1
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Guse AH. Enzymology of Ca 2+-Mobilizing Second Messengers Derived from NAD: From NAD Glycohydrolases to (Dual) NADPH Oxidases. Cells 2023; 12:cells12040675. [PMID: 36831342 PMCID: PMC9954121 DOI: 10.3390/cells12040675] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 02/14/2023] [Accepted: 02/16/2023] [Indexed: 02/23/2023] Open
Abstract
Nicotinamide adenine dinucleotide (NAD) and its 2'-phosphorylated cousin NADP are precursors for the enzymatic formation of the Ca2+-mobilizing second messengers adenosine diphosphoribose (ADPR), 2'-deoxy-ADPR, cyclic ADPR, and nicotinic acid adenine dinucleotide phosphate (NAADP). The enzymes involved are either NAD glycohydrolases CD38 or sterile alpha toll/interleukin receptor motif containing-1 (SARM1), or (dual) NADPH oxidases (NOX/DUOX). Enzymatic function(s) are reviewed and physiological role(s) in selected cell systems are discussed.
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Affiliation(s)
- Andreas H Guse
- The Calcium Signalling Group, Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
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2
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Fukamizu Y, Uchida Y, Shigekawa A, Sato T, Kosaka H, Sakurai T. Safety evaluation of β-nicotinamide mononucleotide oral administration in healthy adult men and women. Sci Rep 2022; 12:14442. [PMID: 36002548 PMCID: PMC9400576 DOI: 10.1038/s41598-022-18272-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 08/08/2022] [Indexed: 11/09/2022] Open
Abstract
A decrease in the intracellular level of nicotinamide adenine dinucleotide (NAD+), an essential coenzyme for metabolic activity, causes various age-related diseases and metabolic abnormalities. Both in-vivo and in-vitro studies have shown that increasing certain NAD+ levels in cell or tissue by supplementing nicotinamide mononucleotide (NMN), a precursor of NAD+, alleviates age-related diseases and metabolic disorders. In recent years, several clinical trials have been performed to elucidate NMN efficacy in humans. However, previous clinical studies with NMN have not reported on the safety of repeated daily oral administration of ≥ 1000 mg/shot in healthy adult men and women, and human clinical trials on NMN safety are limited. Therefore, we conducted a randomized, double-blind, placebo-controlled, parallel-group study to evaluate the safety of 1250 mg of β-NMN administered orally once daily for up to 4 weeks in 31 healthy adult men and women aged 20–65 years. Oral administration of β-NMN did not result in changes exceeding physiological variations in multiple clinical trials, including anthropometry, hematological, biochemical, urine, and body composition analyses. Moreover, no severe adverse events were observed during the study period. Our results indicate that β-NMN is safe and well-tolerated in healthy adult men and women an oral dose of 1250 mg once daily for up to 4 weeks. Trial registration Clinicaltrials.gov Identifier: UMIN000043084. Registered 21/01/2021. https://center6.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000049188.
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Affiliation(s)
- Yuichiro Fukamizu
- Research and Development Division, Mitsubishi Corporation Life Sciences Limited, 1-1-3 Yurakucho, Chiyoda-ku, Tokyo, 100-0006, Japan
| | - Yoshiaki Uchida
- Research and Development Division, Mitsubishi Corporation Life Sciences Limited, 1-1-3 Yurakucho, Chiyoda-ku, Tokyo, 100-0006, Japan
| | - Akari Shigekawa
- Research and Development Division, Mitsubishi Corporation Life Sciences Limited, 1-1-3 Yurakucho, Chiyoda-ku, Tokyo, 100-0006, Japan
| | - Toshiya Sato
- Research and Development Division, Mitsubishi Corporation Life Sciences Limited, 1-1-3 Yurakucho, Chiyoda-ku, Tokyo, 100-0006, Japan
| | - Hisayuki Kosaka
- Takaishi Fujii Hospital, 1-14-25 Ayazono, Takaishi-shi, Ōsaka, 592-0014, Japan
| | - Takanobu Sakurai
- Research and Development Division, Mitsubishi Corporation Life Sciences Limited, 1-1-3 Yurakucho, Chiyoda-ku, Tokyo, 100-0006, Japan.
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3
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Du SH, Shi J, Yu TY, Hu XX, He SM, Cao YY, Xie ZL, Liu SS, Li YT, Li N, Yu JB. Nicotinamide mononucleotide ameliorates acute lung injury by inducing mitonuclear protein imbalance and activating the UPR mt. Exp Biol Med (Maywood) 2022; 247:1264-1276. [PMID: 35538652 PMCID: PMC9379602 DOI: 10.1177/15353702221094235] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Mitochondria need to interact with the nucleus under homeostasis and stress to maintain cellular demands and nuclear transcriptional programs. Disrupted mitonuclear interaction is involved in many disease processes. However, the role of mitonuclear signaling regulators in endotoxin-induced acute lung injury (ALI) remains unknown. Nicotinamide adenine dinucleotide (NAD+) is closely related to mitonuclear interaction with its central role in mitochondrial metabolism. In the current study, C57BL/6J mice were administrated with lipopolysaccharide 15 mg/kg to induce endotoxin-induced ALI and investigated whether the NAD+ precursor nicotinamide mononucleotide (NMN) could preserve mitonuclear interaction and alleviate ALI. After pretreatment with NMN for 7 days, NAD+ levels in the mitochondrial, nucleus, and total intracellular were significantly increased in endotoxemia mice. Moreover, supplementation of NMN alleviated lung pathologic injury, reduced ROS levels, increased MnSOD activities, mitigated mitochondrial dysfunction, ameliorated the defects in the nucleus morphology, and these cytoprotective effects were accompanied by preserving mitonuclear interaction (including mitonuclear protein imbalance and the mitochondrial unfolded protein response, UPRmt). Furthermore, NAD+-mediated mitonuclear protein imbalance and UPRmt are probably regulated by deacetylase Sirtuin1 (SIRT1). Taken together, our results indicated that NMN pretreatment ameliorated ALI by inducing mitonuclear protein imbalance and activating the UPRmt in an SIRT1-dependent manner.
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Affiliation(s)
- Shi-Han Du
- Department of Anesthesiology and Critical Care Medicine, Tianjin Nankai Hospital, Tianjin Medical University, Tianjin 300100, China
| | - Jia Shi
- Department of Anesthesiology and Critical Care Medicine, Tianjin Nankai Hospital, Tianjin Medical University, Tianjin 300100, China
| | - Tian-Yu Yu
- Tianjin Medical University, Tianjin 300070, China
| | - Xin-Xin Hu
- Department of Anesthesiology and Critical Care Medicine, Tianjin Nankai Hospital, Tianjin Medical University, Tianjin 300100, China
| | - Si-Meng He
- Department of Anesthesiology and Critical Care Medicine, Tianjin Nankai Hospital, NanKai University, Tianjin 300071, China
| | - Ying-Ya Cao
- Department of Anesthesiology and Critical Care Medicine, Tianjin Nankai Hospital, Tianjin Medical University, Tianjin 300100, China
| | - Zi-Lei Xie
- Department of Anesthesiology and Critical Care Medicine, Tianjin Nankai Hospital, Tianjin Medical University, Tianjin 300100, China
| | - Sha-Sha Liu
- Department of Anesthesiology and Critical Care Medicine, Tianjin Nankai Hospital, Tianjin Medical University, Tianjin 300100, China
| | - Yu-Ting Li
- Department of Anesthesiology and Critical Care Medicine, Tianjin Nankai Hospital, Tianjin Medical University, Tianjin 300100, China
| | - Na Li
- Department of Anesthesiology and Critical Care Medicine, Tianjin Nankai Hospital, Tianjin Medical University, Tianjin 300100, China
| | - Jian-Bo Yu
- Department of Anesthesiology and Critical Care Medicine, Tianjin Nankai Hospital, Tianjin Medical University, Tianjin 300100, China,Jian-Bo Yu.
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4
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Li X, Zhu Y, Zhang X, An X, Weng M, Shi J, Wang S, Liu C, Luo S, Zheng T. An alternatively spliced STING isoform localizes in the cytoplasmic membrane and directly senses extracellular cGAMP. J Clin Invest 2021; 132:144339. [PMID: 34905508 PMCID: PMC8803335 DOI: 10.1172/jci144339] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 12/09/2021] [Indexed: 11/17/2022] Open
Abstract
It has been revealed that 2'3'-cyclic-GMP-AMP (cGAMP), a second messenger that activates the antiviral stimulator of interferon genes (STING), elicits an antitumoral immune response. Since cGAMP cannot cross the cell membrane, it is not clear how intracellular STING has been activated by extracellular cGAMP until SLC19A1 was identified as an importer to transport extracellular cGAMP into cytosol. However, SLC19A1 deficient cells also sense extracellular cGAMP, suggesting the presence of mechanisms other than the facilitating transporters for STING sensing extracellular cGAMP. Here, we identified an alternatively spliced STING isoform (plasmatic membrane STING, pmSTING) that localized in the plasma membrane with its C-terminus outside the cell, due to lack of one transmembrane domain in its N-terminus compared to canonical STING, by using immunoprecipitation, immunofluorescence and flow cytometry. Further studies showed that extracellular cGAMP not only promoted the dimerization of pmSTING and interaction of pmSTING with Tank-binding kinase 1 (TBK1) and interferon regulatory factor 3 (IRF3), but also enhanced the phosphorylation of TBK1 and IRF3 and production of interferon in pmSTING transfected cells. Additionally, we also identified similar pmSTING isoforms in other animal species including human. This study suggests a conserved role for pmSTING in sensing extracellular cGAMP and provides insight into cGAMP's role as an immunotransmitter.
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Affiliation(s)
- Xiaobo Li
- Department of Pathology, Harbin Medical University, Harbin, China
| | - Yuanyuan Zhu
- Department of Pathology, Harbin Medical University, Harbin, China
| | - Xiao Zhang
- Department of Pathology, Harbin Medical University, Harbin, China
| | - Xiang An
- Department of Pathology, Harbin Medical University, Harbin, China
| | - Mingjiao Weng
- Department of Pathology, Harbin Medical University, Harbin, China
| | - Jiaqi Shi
- Department of Gastrointestinal Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Song Wang
- Department of Pathology, Harbin Medical University, Harbin, China
| | - Caiqi Liu
- Department of Gastrointestinal Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Shengnan Luo
- Department of Gastrointestinal Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Tongsen Zheng
- Department of Gastrointestinal Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, China
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5
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Nabar NR, Heijjer CN, Shi CS, Hwang IY, Ganesan S, Karlsson MCI, Kehrl JH. LRRK2 is required for CD38-mediated NAADP-Ca 2+ signaling and the downstream activation of TFEB (transcription factor EB) in immune cells. Autophagy 2021; 18:204-222. [PMID: 34313548 PMCID: PMC8865229 DOI: 10.1080/15548627.2021.1954779] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
CD38 is a cell surface receptor capable of generating calcium-mobilizing second messengers. It has been implicated in host defense and cancer biology, but signaling mechanisms downstream of CD38 remain unclear. Mutations in LRRK2 (leucine-rich repeat kinase 2) are the most common genetic cause of Parkinson disease; it is also a risk factor for Crohn disease, leprosy, and certain types of cancers. The pathogenesis of these diseases involves inflammation and macroautophagy/autophagy, processes both CD38 and LRRK2 are implicated in. Here, we mechanistically and functionally link CD38 and LRRK2 as upstream activators of TFEB (transcription factor EB), a host defense transcription factor and the master transcriptional regulator of the autophagy/lysosome machinery. In B-lymphocytes and macrophages, we show that CD38 and LRRK2 exist in a complex on the plasma membrane. Ligation of CD38 with the monoclonal antibody clone 90 results in internalization of the CD38-LRRK2 complex and its targeting to the endolysosomal system. This generates an NAADP-dependent calcium signal, which requires LRRK2 kinase activity, and results in the downstream activation of TFEB. lrrk2 KO macrophages accordingly have TFEB activation defects following CD38 or LPS stimulation and fail to switch to glycolytic metabolism after LPS treatment. In overexpression models, the pathogenic LRRK2G2019S mutant promotes hyperactivation of TFEB even in the absence of CD38, both by stabilizing TFEB and promoting its nuclear translocation via aberrant calcium signaling. In sum, we have identified a physiological CD38-LRRK2-TFEB signaling axis in immune cells. The common pathogenic mutant, LRRK2G2019S, appears to hijack this pathway. Abbreviations:ADPR: ADP-ribose; AMPK: AMP-activated protein kinase; BMDM: bone marrow-derived macrophage; cADPR: cyclic-ADP-ribose; COR: C-terminal of ROC; CTSD: cathepsin D; ECAR: extracellular acidification rate; EDTA: ethylenediaminetetraacetic acid; GAPDH: glyceraldehyde-3-phosphate dehydrogenase; GFP: green fluorescent protein; GPN: Gly-Phe β-naphthylamide; GSK3B/GSK3β: glycogen synthase kinase 3 beta; GTP: guanosine triphosphate; KD: knockdown; LAMP1: lysosomal-associated membrane protein 1; LRR: leucine rich repeat; LRRK2: leucine rich repeat kinase 2; mAb: monoclonal antibody; MAP1LC3B/LC3B: microtubule-associated protein 1 light chain 3 beta; MAPK/ERK: mitogen-activated protein kinase; MCOLN1: mucolipin 1; MFI: mean fluorescence intensity; mRNA: messenger RNA; MTOR: mechanistic target of rapamycin kinase; NAADP: nicotinic acid adenine dinucleotide phosphate; NAD: nicotinamide adenine dinucleotide; NADP: nicotinamide adenine dinucleotide phosphate; PD: Parkinson disease; PPP3CB: protein phosphatase 3, catalytic subunit, beta isoform; q-RT-PCR: quantitative reverse transcription polymerase chain reaction; ROC: Ras of complex; siRNA: small interfering RNA; SQSTM1/p62: sequestome 1; TFEB: transcription factor EB; TPCN: two pore channel; TRPM2: transient receptor potential cation channel, subfamily M, member 2; ZKSCAN3: zinc finger with KRAB and SCAN domains 3
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Affiliation(s)
- Neel R Nabar
- B Cell Molecular Immunology Section, Laboratory of Immunoregulation, National Institutes of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Christopher N Heijjer
- B Cell Molecular Immunology Section, Laboratory of Immunoregulation, National Institutes of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Chong-Shan Shi
- B Cell Molecular Immunology Section, Laboratory of Immunoregulation, National Institutes of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Il-Young Hwang
- B Cell Molecular Immunology Section, Laboratory of Immunoregulation, National Institutes of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Sundar Ganesan
- Biological Imaging Section, Research Technologies Branch, National Institutes of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Mikael C I Karlsson
- Department of Microbiology, Tumor, and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - John H Kehrl
- B Cell Molecular Immunology Section, Laboratory of Immunoregulation, National Institutes of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
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6
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Li C, Wu LE. Risks and rewards of targeting NAD + homeostasis in the brain. Mech Ageing Dev 2021; 198:111545. [PMID: 34302821 DOI: 10.1016/j.mad.2021.111545] [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: 03/23/2021] [Revised: 07/18/2021] [Accepted: 07/19/2021] [Indexed: 01/29/2023]
Abstract
Strategies to correct declining nicotinamide adenine dinucleotide (NAD+) levels in neurological disease and biological ageing are promising therapeutic candidates. These strategies include supplementing with NAD+ precursors, small molecule activation of NAD+ biosynthetic enzymes, and treatment with small molecule inhibitors of NAD+ consuming enzymes such as CD38, SARM1 or members of the PARP family. While these strategies have shown efficacy in animal models of neurological disease, each of these has the mechanistic potential for adverse events that could preclude their preclinical use. Here, we discuss the implications of these strategies for treating neurological diseases, including potential off-target effects that may be unique to the brain.
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Affiliation(s)
- Catherine Li
- School of Medical Sciences, UNSW Sydney, NSW, 2052, Australia
| | - Lindsay E Wu
- School of Medical Sciences, UNSW Sydney, NSW, 2052, Australia.
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7
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Najibi M, Honwad HH, Moreau JA, Becker SM, Irazoqui JE. A NOVEL NOX/PHOX-CD38-NAADP-TFEB AXIS IMPORTANT FOR MACROPHAGE ACTIVATION DURING BACTERIAL PHAGOCYTOSIS. Autophagy 2021; 18:124-141. [PMID: 33818279 PMCID: PMC8865266 DOI: 10.1080/15548627.2021.1911548] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Macrophage activation in the presence of bacterial cells and molecules entails complex programs of gene expression. How such triggers elicit specific gene expression programs is incompletely understood. We previously discovered that TFEB (transcription factor EB) is a key contributor to macrophage activation during bacterial phagocytosis. However, the mechanism linking phagocytosis of bacterial cells to TFEB activation and downstream pro-inflammatory cytokine induction remained unknown. We found that macrophages lacking both TFEB and TFE3 (transcription factor E3) were unable to mount a pro-inflammatory phenotype in response to bacterial infection. The NOX/PHOX (NADPH oxidase)-dependent oxidative burst was required for nuclear translocation of TFEB during phagocytosis of Gram-positive or -negative bacteria, and reactive oxygen species (ROS) were sufficient to trigger TFEB activation in a CD38- and NAADP (nicotinic acid adenine dinucleotide phosphate)-dependent manner. Consistent with the Ca2+-releasing activity of NAADP, intracellular Ca2+ chelation and PPP3/calcineurin inhibition prevented TFEB activation by phagocytosis and ROS (reactive oxygen species), impairing the induction of pro-inflammatory cytokines such as IL6 and TNF/TNFα. Therefore, here we describe a previously unknown pathway that links phagocytosis with macrophage pro-inflammatory polarization via TFEB and related transcription factor TFE3. These findings reveal that activation of TFEB and TFE3 is a key regulatory event for the activation of macrophages, and have important implications for infections, inflammation, cancer, obesity, and atherosclerosis.
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Affiliation(s)
- Mehran Najibi
- Department of Microbiology and Physiological Systems and Program in Innate Immunity, University of Massachusetts Medical School, Worcester, USA.,Present Address: Department of Pathology, The Warren Alpert Medical School of Brown University, Providence
| | - Havisha H Honwad
- Department of Microbiology and Physiological Systems and Program in Innate Immunity, University of Massachusetts Medical School, Worcester, USA
| | - Joseph A Moreau
- Department of Microbiology and Physiological Systems and Program in Innate Immunity, University of Massachusetts Medical School, Worcester, USA
| | - Stephanie M Becker
- Department of Microbiology and Physiological Systems and Program in Innate Immunity, University of Massachusetts Medical School, Worcester, USA
| | - Javier E Irazoqui
- Department of Microbiology and Physiological Systems and Program in Innate Immunity, University of Massachusetts Medical School, Worcester, USA
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Zuo W, Liu N, Zeng Y, Liu Y, Li B, Wu K, Xiao Y, Liu Q. CD38: A Potential Therapeutic Target in Cardiovascular Disease. Cardiovasc Drugs Ther 2020; 35:815-828. [PMID: 32472237 DOI: 10.1007/s10557-020-07007-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Substantial research has demonstrated the association between cardiovascular disease and the dysregulation of intracellular calcium, ageing, reduction in nicotinamide adenine dinucleotide NAD+ content, and decrease in sirtuin activity. CD38, which comprises the soluble type, type II, and type III, is the main NADase in mammals. This molecule catalyses the production of cyclic adenosine diphosphate ribose (cADPR), nicotinic acid adenine dinucleotide phosphate (NAADP), and adenosine diphosphate ribose (ADPR), which stimulate the release of Ca2+, accompanied by NAD+ consumption and decreased sirtuin activity. Therefore, the relationship between cardiovascular disease and CD38 has been attracting increased attention. In this review, we summarize the structure, regulation, function, targeted drug development, and current research on CD38 in the cardiac context. More importantly, we provide original views about the as yet elusive mechanisms of CD38 action in certain cardiovascular disease models. Based on our review, we predict that CD38 may serve as a novel therapeutic target in cardiovascular disease in the future.
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Affiliation(s)
- Wanyun Zuo
- Department of Cardiovascular Medicine, The Second Xiangya Hospital of Central South University, No. 139 Middle Renmin Road, Furong District, Changsha, 410011, Hunan, China
| | - Na Liu
- Department of Cardiovascular Medicine, The Second Xiangya Hospital of Central South University, No. 139 Middle Renmin Road, Furong District, Changsha, 410011, Hunan, China
| | - Yunhong Zeng
- Department of Cardiology, Hunan Children's Hospital, No. 86 Ziyuan Road, Yuhua District, Changsha, 410007, Hunan, China
| | - Yaozhong Liu
- Department of Cardiovascular Medicine, The Second Xiangya Hospital of Central South University, No. 139 Middle Renmin Road, Furong District, Changsha, 410011, Hunan, China
| | - Biao Li
- Department of Cardiovascular Medicine, The Second Xiangya Hospital of Central South University, No. 139 Middle Renmin Road, Furong District, Changsha, 410011, Hunan, China
| | - Keke Wu
- Department of Cardiovascular Medicine, The Second Xiangya Hospital of Central South University, No. 139 Middle Renmin Road, Furong District, Changsha, 410011, Hunan, China
| | - Yunbin Xiao
- Department of Cardiology, Hunan Children's Hospital, No. 86 Ziyuan Road, Yuhua District, Changsha, 410007, Hunan, China.
| | - Qiming Liu
- Department of Cardiovascular Medicine, The Second Xiangya Hospital of Central South University, No. 139 Middle Renmin Road, Furong District, Changsha, 410011, Hunan, China.
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Tolomeo S, Chiao B, Lei Z, Chew SH, Ebstein RP. A Novel Role of CD38 and Oxytocin as Tandem Molecular Moderators of Human Social Behavior. Neurosci Biobehav Rev 2020; 115:251-272. [PMID: 32360414 DOI: 10.1016/j.neubiorev.2020.04.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Revised: 03/18/2020] [Accepted: 04/10/2020] [Indexed: 12/16/2022]
Abstract
Oxytocin is an important modulator of human affiliative behaviors, including social skills, human pair bonding, and friendship. CD38 will be discussed as an immune marker and then in more detail the mechanisms of CD38 on releasing brain oxytocin. Mention is made of the paralogue of oxytocin, vasopressin, that has often overlapping and complementary functions with oxytocin on social behavior. Curiously, vasopressin does not require CD38 to be released from the brain. This review discusses the social salience hypothesis of oxytocin action, a novel view of how this molecule influences much of human social behaviors often in contradictory ways. The oxytocinergic-vasopressinergic systems are crucial modulators of broad aspects of human personality. Of special interest are studies of these two hormones in trust related behavior observed using behavioral economic games. This review also covers the role of oxytocin in parenting and parental attachment. In conclusion, the effects of oxytocin on human behavior depend on the individual's social context and importantly as well, the individual's cultural milieu, viz. East and West. ACRONYMS: ACC = Anterior Cingulate ADP = Adenosine diphosphate AQ = Autism Quotient cADPR = Cyclic ADP-ribose CNS = Central nervous system DA = Dopamine eQTLC = Expression Quantitative Trait Loci LC-NE = Locus Coeruleus-Norepinephrine MRI = Magnetic Resonance Imaging OFC = Orbitofrontal cortices OXT = Oxytocin RAGE = Receptor for advanced glycation end-products SARM1 = Sterile Alpha and toll/interleukin-1 receptor motif-containing 1 TRPM2= Transient Receptor Potential Cation Channel Subfamily M Member 2 AVP = Vasopressin.
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Affiliation(s)
- Serenella Tolomeo
- Department of Psychology, National University of Singapore, Singapore.
| | - Benjamin Chiao
- CCBEF (China Center for Behavior Economics and Finance) & SOE (School of Economics), Southwestern University of Finance and Economics, Chengdu, China; PSB Paris School of Business, Paris, France
| | - Zhen Lei
- CCBEF (China Center for Behavior Economics and Finance) & SOE (School of Economics), Southwestern University of Finance and Economics, Chengdu, China
| | - Soo Hong Chew
- CCBEF (China Center for Behavior Economics and Finance) & SOE (School of Economics), Southwestern University of Finance and Economics, Chengdu, China.
| | - Richard P Ebstein
- CCBEF (China Center for Behavior Economics and Finance) & SOE (School of Economics), Southwestern University of Finance and Economics, Chengdu, China.
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10
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Okabe K, Yaku K, Tobe K, Nakagawa T. Implications of altered NAD metabolism in metabolic disorders. J Biomed Sci 2019; 26:34. [PMID: 31078136 PMCID: PMC6511662 DOI: 10.1186/s12929-019-0527-8] [Citation(s) in RCA: 133] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 04/25/2019] [Indexed: 12/15/2022] Open
Abstract
Nicotinamide adenine dinucleotide (NAD) is an important coenzyme that participates in various energy metabolism pathways, including glycolysis, β-oxidation, and oxidative phosphorylation. Besides, it is a required cofactor for post-translational modifications such as ADP-ribosylation and deacetylation by poly (ADP-ribose) polymerases (PARPs) and sirtuins, respectively. Thus, NAD regulates energy metabolism, DNA damage repair, gene expression, and stress response through these enzymes. Numerous studies have shown that NAD levels decrease with aging and under disturbed nutrient conditions, such as obesity. Additionally, a decline in NAD levels is closely related to the development of various metabolic disorders, including diabetes and fatty liver disease. In addition, many studies have revealed that administration of NAD precursors, such as nicotinamide mononucleotide (NMN) and nicotinamide riboside (NR), efficiently increase NAD levels in various tissues and prevent such metabolic diseases. These NAD precursors are contained in natural foods, such as cow milk, vegetables, and meats. Therefore, altered NAD metabolism can be a practical target for nutritional intervention. Recently, several human clinical trials using NAD precursors have been conducted to investigate the safety, pharmacokinetics, and efficacy against metabolic disorders such as glucose intolerance. In this review, we summarize current knowledge on the implications of NAD metabolism in metabolic diseases and discuss the outcomes of recent human clinical trials.
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Affiliation(s)
- Keisuke Okabe
- Department of Metabolism and Nutrition, Graduate School of Medicine and Pharmaceutical Science for Research, University of Toyama, 2630 Sugitani, Toyama, Toyama 930-0194 Japan
- First Department of Internal Medicine, Graduate School of Medicine and Pharmaceutical Science for Research, University of Toyama, Toyama, 930-0194 Japan
| | - Keisuke Yaku
- Department of Metabolism and Nutrition, Graduate School of Medicine and Pharmaceutical Science for Research, University of Toyama, 2630 Sugitani, Toyama, Toyama 930-0194 Japan
| | - Kazuyuki Tobe
- First Department of Internal Medicine, Graduate School of Medicine and Pharmaceutical Science for Research, University of Toyama, Toyama, 930-0194 Japan
| | - Takashi Nakagawa
- Department of Metabolism and Nutrition, Graduate School of Medicine and Pharmaceutical Science for Research, University of Toyama, 2630 Sugitani, Toyama, Toyama 930-0194 Japan
- Institute of Natural Medicine, University of Toyama, Toyama, 930-0194 Japan
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11
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Rodríguez-Alba JC, Abrego-Peredo A, Gallardo-Hernández C, Pérez-Lara J, Santiago-Cruz JW, Jiang JW, Espinosa E. HIV Disease Progression: Overexpression of the Ectoenzyme CD38 as a Contributory Factor? Bioessays 2019; 41:e1800128. [PMID: 30537007 PMCID: PMC6545924 DOI: 10.1002/bies.201800128] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2018] [Revised: 11/02/2018] [Indexed: 12/16/2022]
Abstract
Despite abundant evidence associating CD38 overexpression and CD4 T cell depletion in HIV infection, no causal relation has been investigated. To address this issue, a series of mechanisms are proposed, supported by evidence from different fields, by which CD38 overexpression can facilitate CD4 T cell depletion in HIV infection. According to this model, increased catalytic activity of CD38 may reduce CD4 T cells' cytoplasmic nicotin-amide adenine dinucleotide (NAD), leading to a chronic Warburg effect. This will reduce mitochondrial function. Simultaneously, CD38's catalytic products ADPR and cADPR may be transported to the cytoplasm, where they can activate calcium channels and increase cytoplasmic Ca2+ concentrations, further altering mitochondrial integrity. These mechanisms will decrease the viability and regenerative capacity of CD4 T cells. These hypotheses can be tested experimentally, and might reveal novel therapeutic targets. Also see the video abstract here https://youtu.be/k1LTyiTKPKs.
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Affiliation(s)
- J. C. Rodríguez-Alba
- Flow Cytometry Core Facility, Instituto de Ciencias de la Salud, Universidad Veracruzana, Xalapa, Mexico
| | - A. Abrego-Peredo
- Doctorado en Ciencias de la Salud, Instituto de Ciencias de la Salud, Universidad Veracruzana, Xalapa, Mexico
| | - C. Gallardo-Hernández
- Doctorado en Ciencias de la Salud, Instituto de Ciencias de la Salud, Universidad Veracruzana, Xalapa, Mexico
| | - J. Pérez-Lara
- Doctorado en Ciencias de la Salud, Instituto de Ciencias de la Salud, Universidad Veracruzana, Xalapa, Mexico
| | - J. W. Santiago-Cruz
- Maestría en Ciencias de la Salud, Instituto de Ciencias de la Salud, Universidad Veracruzana, Xalapa, Mexico
| | - J., W. Jiang
- Department of Microbiology and Immunology, and Division of Infectious Diseases, Department of Medicine, Medical University of South Carolina, Charleston, SC, USA, 29425
| | - E. Espinosa
- Laboratory of Integrative Immunology, National Institute of Respiratory Diseases (INER), Mexico City, Mexico
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12
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Park DR, Nam TS, Kim YW, Bae YS, Kim UH. Oxidative activation of type III CD38 by NADPH oxidase-derived hydrogen peroxide in Ca 2+ signaling. FASEB J 2018; 33:3404-3419. [PMID: 30452880 DOI: 10.1096/fj.201800235r] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Reactive oxygen species (ROS) derived from NADPH oxidase (Nox) has been shown to activate ADP-ribosyl cyclase (ARC), which produces the Ca2+ mobilizing second messenger, cyclic ADP-ribose (cADPR). In the present study, we examined how ROS activates cluster of differentiation (CD)38, a mammalian prototype of ARC. CD38 exists in type II and III forms with opposing membrane orientation. This study showed the coexpression of type II and III CD38 in lymphokine-activated killer (LAK) cells. The catalytic site of the constitutively active type II CD38 faces the outside of the cell or the inside of early endosomes (EEs), whereas the basally inactive type III CD38 faces the cytosol. Type III CD38 interacted with Nox4/phosphorylated-p22phox (p-p22phox) in EEs of LAK cells upon IL-8 treatment. H2O2 derived from Nox4 activated type III CD38 by forming a disulfide bond between Cys164 and Cys177, resulting in increased cADPR formation. Our study identified the mechanism by which type III CD38 is activated in an immune cell (LAK), in which H2O2 generated by Nox4 oxidizes and activates type III CD38 to generate cADPR. These findings provide a novel model of cross-talk between ROS and Ca2+ signaling.-Park, D.-R., Nam, T.-S., Kim, Y.-W., Bae, Y. S., Kim, U.-H. Oxidative activation of type III CD38 by NADPH oxidase-derived hydrogen peroxide in Ca2+ signaling.
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Affiliation(s)
- Dae-Ryoung Park
- Department of Biochemistry, Chonbuk National University Medical School, Jeonju, Korea.,National Creative Research Laboratory for Ca2+ Signaling Network, Chonbuk National University Medical School, Jeonju, Korea
| | - Tae-Sik Nam
- Department of Biochemistry, Chonbuk National University Medical School, Jeonju, Korea.,National Creative Research Laboratory for Ca2+ Signaling Network, Chonbuk National University Medical School, Jeonju, Korea
| | - Ye-Won Kim
- Department of Biochemistry, Chonbuk National University Medical School, Jeonju, Korea.,National Creative Research Laboratory for Ca2+ Signaling Network, Chonbuk National University Medical School, Jeonju, Korea
| | - Yun Soo Bae
- Department of Life Science, College of Natural Sciences, Ewha Womans University, Seoul, Korea; and
| | - Uh-Hyun Kim
- Department of Biochemistry, Chonbuk National University Medical School, Jeonju, Korea.,National Creative Research Laboratory for Ca2+ Signaling Network, Chonbuk National University Medical School, Jeonju, Korea.,Institute of Cardiovascular Research, Chonbuk National University Medical School, Jeonju, Korea
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13
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Fang C, Li T, Li Y, Xu GJ, Deng QW, Chen YJ, Hou YN, Lee HC, Zhao YJ. CD38 produces nicotinic acid adenosine dinucleotide phosphate in the lysosome. J Biol Chem 2018; 293:8151-8160. [PMID: 29632067 DOI: 10.1074/jbc.ra118.002113] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 03/28/2018] [Indexed: 11/06/2022] Open
Abstract
Nicotinic acid adenosine dinucleotide phosphate (NAADP) is a Ca2+-mobilizing second messenger that regulates a wide range of biological activities. However, the mechanism of its biogenesis remains controversial. CD38 is the only enzyme known to catalyze NAADP synthesis from NADP and nicotinic acid. CD38-mediated catalysis requires an acidic pH, suggesting that NAADP may be produced in acidic endolysosomes, but this hypothesis is untested. In this study, using human cell lines, we specifically directed CD38 to the endolysosomal system and assessed cellular NAADP production. First, we found that nanobodies targeting various epitopes on the C-terminal domain of CD38 could bind to cell surface-localized CD38 and induce its endocytosis. We also found that CD38 internalization occurred via a clathrin-dependent pathway, delivered CD38 to the endolysosome, and elevated intracellular NAADP levels. We also created a CD38 variant for lysosome-specific expression, which not only withstood the degradative environment in the lysosome, but was also much more active than WT CD38 in elevating cellular NAADP levels. Supplementing CD38-expressing cells with nicotinic acid substantially increased cellular NAADP levels. These results demonstrate that endolysosomal CD38 can produce NAADP in human cells. They further suggest that CD38's compartmentalization to the lysosome may allow for its regulation via substrate access, rather than enzyme activation, thereby providing a reliable mechanism for regulating cellular NAADP production.
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Affiliation(s)
- Cheng Fang
- Laboratory of Cytophysiology, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Ting Li
- Laboratory of Cytophysiology, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Ying Li
- Laboratory of Cytophysiology, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Guan Jie Xu
- Laboratory of Cytophysiology, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Qi Wen Deng
- Laboratory of Cytophysiology, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Ya Jie Chen
- Laboratory of Cytophysiology, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Yun Nan Hou
- Laboratory of Cytophysiology, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Hon Cheung Lee
- Laboratory of Cytophysiology, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China.
| | - Yong Juan Zhao
- Laboratory of Cytophysiology, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China.
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14
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Abstract
SIGNIFICANCE Pyridine dinucleotides, nicotinamide adenine dinucleotide (NAD) and nicotinamide adenine dinucleotide phosphate (NADP), were discovered more than 100 years ago as necessary cofactors for fermentation in yeast extracts. Since that time, these molecules have been recognized as fundamental players in a variety of cellular processes, including energy metabolism, redox homeostasis, cellular signaling, and gene transcription, among many others. Given their critical role as mediators of cellular responses to metabolic perturbations, it is unsurprising that dysregulation of NAD and NADP metabolism has been associated with the pathobiology of many chronic human diseases. Recent Advances: A biochemistry renaissance in biomedical research, with its increasing focus on the metabolic pathobiology of human disease, has reignited interest in pyridine dinucleotides, which has led to new insights into the cell biology of NAD(P) metabolism, including its cellular pharmacokinetics, biosynthesis, subcellular localization, and regulation. This review highlights these advances to illustrate the importance of NAD(P) metabolism in the molecular pathogenesis of disease. CRITICAL ISSUES Perturbations of NAD(H) and NADP(H) are a prominent feature of human disease; however, fundamental questions regarding the regulation of the absolute levels of these cofactors and the key determinants of their redox ratios remain. Moreover, an integrated topological model of NAD(P) biology that combines the metabolic and other roles remains elusive. FUTURE DIRECTIONS As the complex regulatory network of NAD(P) metabolism becomes illuminated, sophisticated new approaches to manipulating these pathways in specific organs, cells, or organelles will be developed to target the underlying pathogenic mechanisms of disease, opening doors for the next generation of redox-based, metabolism-targeted therapies. Antioxid. Redox Signal. 28, 180-212.
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Affiliation(s)
- Joshua P Fessel
- 1 Department of Medicine, Vanderbilt University , Nashville, Tennessee
| | - William M Oldham
- 2 Department of Medicine, Brigham and Women's Hospital , Boston, Massachusetts.,3 Department of Medicine, Harvard Medical School , Boston, Massachusetts
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15
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Yalçintepe L, Halis E, Ulku S. Effect of CD38 on the multidrug resistance of human chronic myelogenous leukemia K562 cells to doxorubicin. Oncol Lett 2016; 11:2290-2296. [PMID: 26998164 DOI: 10.3892/ol.2016.4165] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 12/14/2015] [Indexed: 01/10/2023] Open
Abstract
Drug resistance is a serious challenge in cancer chemotherapy. Alterations in the intracellular concentration and homeostasis of calcium (Ca2+) may contribute to the development of drug resistance. To investigate the mechanism of drug resistance in leukemia, the present study rendered human chronic myelogenous leukemia K562 cells resistant to the cytotoxic effect of doxorubicin by progressively adapting the sensitive parental K562 cells to doxorubicin. The resulting cells were termed K562/DOX. Subsequently, the expression of two multidrug resistance proteins, P-glycoprotein (P-gp) and multidrug resistance protein 1 (MRP1), was analyzed in K562/DOX cells. In addition to P-gp and MRP1, these cells also expressed cluster of differentiation (CD)38 and its active enzyme adenosine diphosphate (ADP)-ribosyl cyclase. The present study also demonstrated that K562/DOX cells responded to cyclic ADP-ribose-mediated increases in intracellular Ca2+. These data indicate that CD38 may participate in the development of drug resistance to doxorubicin in K562 cells.
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Affiliation(s)
- Leman Yalçintepe
- Department of Biophysics, Istanbul Faculty of Medicine, Istanbul University, Çapa-Istanbul, Istanbul 34093, Turkey
| | - Emre Halis
- Department of Biophysics, Istanbul Faculty of Medicine, Istanbul University, Çapa-Istanbul, Istanbul 34093, Turkey
| | - Sibel Ulku
- Department of Biophysics, Istanbul Faculty of Medicine, Istanbul University, Çapa-Istanbul, Istanbul 34093, Turkey
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16
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Structure, function, evolution, and application of bacterial Pnu-type vitamin transporters. Biol Chem 2015; 396:955-66. [DOI: 10.1515/hsz-2015-0113] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Accepted: 02/17/2015] [Indexed: 11/15/2022]
Abstract
AbstractMany bacteria can take up vitamins from the environment via specific transport machineries. Uptake is essential for organisms that lack complete vitamin biosynthesis pathways, but even in the presence of biosynthesis routes uptake is likely preferred, because it is energetically less costly. Pnu transporters represent a class of membrane transporters for a diverse set of B-type vitamins. They were identified 30 years ago and catalyze transport by the mechanism of facilitated diffusion, without direct coupling to ATP hydrolysis or transport of coupling ions. Instead, directionality is achieved by metabolic trapping, in which the vitamin substrate is converted into a derivative that cannot be transported, for instance by phosphorylation. The recent crystal structure of the nicotinamide riboside transporter PnuC has provided the first insights in substrate recognition and selectivity. Here, we will summarize the current knowledge about the function, structure, and evolution of Pnu transporters. Additionally, we will highlight their role for potential biotechnological and pharmaceutical applications.
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17
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Nikiforov A, Kulikova V, Ziegler M. The human NAD metabolome: Functions, metabolism and compartmentalization. Crit Rev Biochem Mol Biol 2015; 50:284-97. [PMID: 25837229 PMCID: PMC4673589 DOI: 10.3109/10409238.2015.1028612] [Citation(s) in RCA: 162] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The metabolism of NAD has emerged as a key regulator of cellular and organismal homeostasis. Being a major component of both bioenergetic and signaling pathways, the molecule is ideally suited to regulate metabolism and major cellular events. In humans, NAD is synthesized from vitamin B3 precursors, most prominently from nicotinamide, which is the degradation product of all NAD-dependent signaling reactions. The scope of NAD-mediated regulatory processes is wide including enzyme regulation, control of gene expression and health span, DNA repair, cell cycle regulation and calcium signaling. In these processes, nicotinamide is cleaved from NAD+ and the remaining ADP-ribosyl moiety used to modify proteins (deacetylation by sirtuins or ADP-ribosylation) or to generate calcium-mobilizing agents such as cyclic ADP-ribose. This review will also emphasize the role of the intermediates in the NAD metabolome, their intra- and extra-cellular conversions and potential contributions to subcellular compartmentalization of NAD pools.
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Affiliation(s)
- Andrey Nikiforov
- a Institute of Nanobiotechnologies, St. Petersburg State Polytechnical University , St. Petersburg , Russia .,b Institute of Cytology, Russian Academy of Sciences , St. Petersburg , Russia , and
| | - Veronika Kulikova
- a Institute of Nanobiotechnologies, St. Petersburg State Polytechnical University , St. Petersburg , Russia
| | - Mathias Ziegler
- c Department of Molecular Biology , University of Bergen , Bergen , Norway
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18
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Mutafova-Yambolieva VN, Durnin L. The purinergic neurotransmitter revisited: a single substance or multiple players? Pharmacol Ther 2014; 144:162-91. [PMID: 24887688 PMCID: PMC4185222 DOI: 10.1016/j.pharmthera.2014.05.012] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Accepted: 05/23/2014] [Indexed: 12/20/2022]
Abstract
The past half century has witnessed tremendous advances in our understanding of extracellular purinergic signaling pathways. Purinergic neurotransmission, in particular, has emerged as a key contributor in the efficient control mechanisms in the nervous system. The identity of the purine neurotransmitter, however, remains controversial. Identifying it is difficult because purines are present in all cell types, have a large variety of cell sources, and are released via numerous pathways. Moreover, studies on purinergic neurotransmission have relied heavily on indirect measurements of integrated postjunctional responses that do not provide direct information for neurotransmitter identity. This paper discusses experimental support for adenosine 5'-triphosphate (ATP) as a neurotransmitter and recent evidence for possible contribution of other purines, in addition to or instead of ATP, in chemical neurotransmission in the peripheral, enteric and central nervous systems. Sites of release and action of purines in model systems such as vas deferens, blood vessels, urinary bladder and chromaffin cells are discussed. This is preceded by a brief discussion of studies demonstrating storage of purines in synaptic vesicles. We examine recent evidence for cell type targets (e.g., smooth muscle cells, interstitial cells, neurons and glia) for purine neurotransmitters in different systems. This is followed by brief discussion of mechanisms of terminating the action of purine neurotransmitters, including extracellular nucleotide hydrolysis and possible salvage and reuptake in the cell. The significance of direct neurotransmitter release measurements is highlighted. Possibilities for involvement of multiple purines (e.g., ATP, ADP, NAD(+), ADP-ribose, adenosine, and diadenosine polyphosphates) in neurotransmission are considered throughout.
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Affiliation(s)
| | - Leonie Durnin
- Department of Physiology and Cell Biology, University of Nevada School of Medicine, Reno, NV 89557, United States
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19
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Di Stefano M, Conforti L. Diversification of NAD biological role: the importance of location. FEBS J 2013; 280:4711-28. [PMID: 23848828 DOI: 10.1111/febs.12433] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2012] [Accepted: 07/08/2013] [Indexed: 02/03/2023]
Abstract
Over 100 years after its first discovery, several new aspects of the biology of the redox co-factor NAD are rapidly emerging. NAD, as well as its precursors, its derivatives, and its metabolic enzymes, have been recently shown to play a determinant role in a variety of biological functions, from the classical role in oxidative phosphorylation and redox reactions to a role in regulation of gene transcription, lifespan and cell death, from a role in neurotransmission to a role in axon degeneration, and from a function in regulation of glucose homeostasis to that of control of circadian rhythm. It is also becoming clear that this variety of specialized functions is regulated by the fine subcellular localization of NAD, its related nucleotides and its metabolic enzymatic machinery. Here we describe the known NAD biosynthetic and catabolic pathways, and review evidence supporting a specialized role for NAD metabolism in a subcellular compartment-dependent manner.
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Affiliation(s)
- Michele Di Stefano
- School of Biomedical Sciences, University of Nottingham Medical School, Queen's Medical Centre, UK
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20
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Li PL, Zhang Y, Abais JM, Ritter JK, Zhang F. Cyclic ADP-Ribose and NAADP in Vascular Regulation and Diseases. ACTA ACUST UNITED AC 2013; 2:63-85. [PMID: 24749015 DOI: 10.1166/msr.2013.1022] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cyclic ADP-ribose (cADPR) and nicotinic acid adenine dinucleotide phosphate (NAADP), two intracellular Ca2+ mobilizing second messengers, have been recognized as a fundamental signaling mechanism regulating a variety of cell or organ functions in different biological systems. Here we reviewed the literature regarding these ADP-ribosylcyclase products in vascular cells with a major focus on their production, physiological roles, and related underlying mechanisms mediating their actions. In particular, several hot topics in this area of research are comprehensively discussed, which may help understand some of the controversial evidence provided by different studies. For example, some new models are emerging for the agonist receptor coupling of CD38 or ADP-ribosylcyclase and for the formation of an acidic microenvironment to facilitate the production of NAADP in vascular cells. We also summarized the evidence regarding the NAADP-mediated two-phase Ca2+ release with a slow Ca2+-induced Ca2+ release (CICR) and corresponding physiological relevance. The possibility of a permanent structural space between lysosomes and sarcoplasmic reticulum (SR), as well as the critical role of lysosome trafficking in phase 2 Ca2+ release in response to some agonists are also explored. With respect to the molecular targets of NAADP within cells, several possible candidates including SR ryanodine receptors (RyRs), lysosomal transient receptor potential-mucolipin 1 (TRP-ML1) and two pore channels (TPCs) are presented with supporting and opposing evidence. Finally, the possible role of NAADP-mediated regulation of lysosome function in autophagy and atherogenesis is discussed, which may indicate a new direction for further studies on the pathological roles of cADPR and NAADP in the vascular system.
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Affiliation(s)
- Pin-Lan Li
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, VA 23298, USA
| | - Yang Zhang
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, VA 23298, USA
| | - Justine M Abais
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, VA 23298, USA
| | - Joseph K Ritter
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, VA 23298, USA
| | - Fan Zhang
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, VA 23298, USA
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21
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Molecular mechanism and functional role of brefeldin A-mediated ADP-ribosylation of CtBP1/BARS. Proc Natl Acad Sci U S A 2013; 110:9794-9. [PMID: 23716697 DOI: 10.1073/pnas.1222413110] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
ADP-ribosylation is a posttranslational modification that modulates the functions of many target proteins. We previously showed that the fungal toxin brefeldin A (BFA) induces the ADP-ribosylation of C-terminal-binding protein-1 short-form/BFA-ADP-ribosylation substrate (CtBP1-S/BARS), a bifunctional protein with roles in the nucleus as a transcription factor and in the cytosol as a regulator of membrane fission during intracellular trafficking and mitotic partitioning of the Golgi complex. Here, we report that ADP-ribosylation of CtBP1-S/BARS by BFA occurs via a nonconventional mechanism that comprises two steps: (i) synthesis of a BFA-ADP-ribose conjugate by the ADP-ribosyl cyclase CD38 and (ii) covalent binding of the BFA-ADP-ribose conjugate into the CtBP1-S/BARS NAD(+)-binding pocket. This results in the locking of CtBP1-S/BARS in a dimeric conformation, which prevents its binding to interactors known to be involved in membrane fission and, hence, in the inhibition of the fission machinery involved in mitotic Golgi partitioning. As this inhibition may lead to arrest of the cell cycle in G2, these findings provide a strategy for the design of pharmacological blockers of cell cycle in tumor cells that express high levels of CD38.
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22
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Jover E, Tawk MY, Laventie BJ, Poulain B, Prévost G. Staphylococcal leukotoxins trigger free intracellular Ca(2+) rise in neurones, signalling through acidic stores and activation of store-operated channels. Cell Microbiol 2012; 15:742-58. [PMID: 23152983 PMCID: PMC3654557 DOI: 10.1111/cmi.12069] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Revised: 10/18/2012] [Accepted: 11/06/2012] [Indexed: 12/31/2022]
Abstract
Headache, muscle aches and chest pain of mild to medium intensity are among the most common clinical symptoms in moderate Staphylococcus aureus infections, with severe infections usually associated with worsening pain symptoms. These nociceptive responses of the body raise the question of how bacterial infection impinges on the nervous system. Does S. aureus, or its released virulence factors, act directly on neurones? To address this issue, we evaluated the potential effects on neurones of certain bi-component leukotoxins, which are virulent factors released by the bacterium. The activity of four different leukotoxins was verified by measuring the release of glutamate from rat cerebellar granular neurones. The bi-component γ-haemolysin HlgC/HlgB was the most potent leukotoxin, initiating transient rises in intracellular Ca2+ concentration in cerebellar neurones and in primary sensory neurones from dorsal root ganglia, as probed with the Fura-2 Ca2+ indicator dye. Using pharmacological antagonists of receptors and Ca2+ channels, the variations in intracellular Ca2+ concentration were found independent of the activation of voltage-operatedCa2+ channels or glutamate receptors. Drugs targeting Sarco-Endoplasmic Reticulum Ca2+-ATPase (SERCA) or H+-ATPase and antagonists of the store-operated Ca2+ entry complex blunted, or significantly reduced, the leukotoxin-induced elevation in intracellular Ca2+. Moreover, activation of the ADP-ribosyl cyclase CD38 was also required to initiate the release of Ca2+ from acidic stores. These findings suggest that, prior to forming a pore at the plasma membrane, leukotoxin HlgC/HlgB triggers a multistep process which initiates the release of Ca2+ from lysosomes, modifies the steady-state level of reticular Ca2+ stores and finally activates the Store-Operated Calcium Entry complex.
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Affiliation(s)
- Emmanuel Jover
- INCI - UPR-CNRS 3212, Neurotransmission et sécrétion neuroendocrine, 5, rue Blaise Pascal, F- 67084 Strasbourg cedex, France. jover@inci-cnrs
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23
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Karimi-Busheri F, Zadorozhny V, Carrier E, Fakhrai H. Molecular integrity and global gene expression of breast and lung cancer stem cells under long-term storage and recovery. Cell Tissue Bank 2012; 14:175-86. [PMID: 22592563 PMCID: PMC3663207 DOI: 10.1007/s10561-012-9315-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Accepted: 04/20/2012] [Indexed: 12/12/2022]
Abstract
Cryopreservation is a common procedure widely used in biological and clinical sciences. Similar protocols are also applied in preserving cancer stem cells, a field with high promises and challenges. Specific cell surface membrane proteins are considered to be biomarkers of cancer stem cells and they may play a critical role in differentiating stem cells from non stem cells. We have looked at the possible effect of long-term cryopreservation on the molecular integrity of breast MCF7 and lung, A549 and H460, cancer stem cells and to assess if these cells are more sensitive to long-term storage process. We analyzed the expression of CD24 and CD38 as two potent biomarkers of lung cancer stem cells and EpCAM and ALDH that are used as biomarkers of a wide range of cancer stem cells. We also selected three genes essential for the normal functioning of the cells, Fos, MUC1, and HLA. Our results indicate a pattern of down-regulation in the expression of the genes following freezing, in particular among cell surface marker proteins. Global gene expression of the post-thaw breast and lung cancer stem cells also reveals a significant down-regulation in freeze-thaw cells independent from each other. Analyzing the canonical pathways between two populations reveals a significant alteration in the gene expression of the pathways involved in cell cycle, mitosis, and ataxia telangiectasia mutated pathways. Overall, our results indicate that current protocols for long-term storage of lung and breast cancer stem cells may substantially influence the activity and function of genes.
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24
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Kang J, Park KH, Kim JJ, Jo EK, Han MK, Kim UH. The role of CD38 in Fcγ receptor (FcγR)-mediated phagocytosis in murine macrophages. J Biol Chem 2012; 287:14502-14. [PMID: 22396532 DOI: 10.1074/jbc.m111.329003] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Phagocytosis is a crucial event in the immune system that allows cells to engulf and eliminate pathogens. This is mediated through the action of immunoglobulin (IgG)-opsonized microbes acting on Fcγ receptors (FcγR) on macrophages, which results in sustained levels of intracellular Ca(2+) through the mobilization of Ca(2+) second messengers. It is known that the ADP-ribosyl cyclase is responsible for the rise in Ca(2+) levels after FcγR activation. However, it is unclear whether and how CD38 is involved in FcγR-mediated phagocytosis. Here we show that CD38 is recruited to the forming phagosomes during phagocytosis of IgG-opsonized particles and produces cyclic-ADP-ribose, which acts on ER Ca(2+) stores, thus allowing an increase in FcγR activation-mediated phagocytosis. Ca(2+) data show that pretreatment of J774A.1 macrophages with 8-bromo-cADPR, ryanodine, blebbistatin, and various store-operated Ca(2+) inhibitors prevented the long-lasting Ca(2+) signal, which significantly reduced the number of ingested opsonized particles. Ex vivo data with macrophages extracted from CD38(-/-) mice also shows a reduced Ca(2+) signaling and phagocytic index. Furthermore, a significantly reduced phagocytic index of Mycobacterium bovis BCG was shown in macrophages from CD38(-/-) mice in vivo. This study suggests a crucial role of CD38 in FcγR-mediated phagocytosis through its recruitment to the phagosome and mobilization of cADPR-induced intracellular Ca(2+) and store-operated extracellular Ca(2+) influx.
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Affiliation(s)
- John Kang
- Department of Biochemistry, Chonbuk National University Medical School, Jeonju, 561-180, Korea
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Masuda W, Jimi E. CD38/ADP-ribosyl cyclase in the rat sublingual gland: Subcellular localization under resting and saliva-secreting conditions. Arch Biochem Biophys 2011; 513:131-9. [DOI: 10.1016/j.abb.2011.07.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2011] [Revised: 07/06/2011] [Accepted: 07/07/2011] [Indexed: 12/01/2022]
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Zhang X, Mou Z. Extracellular pyridine nucleotides induce PR gene expression and disease resistance in Arabidopsis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2009; 57:302-12. [PMID: 18798871 DOI: 10.1111/j.1365-313x.2008.03687.x] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Although it is well known that the pyridine nucleotides NAD and NADP function inside the cell to regulate intracellular signaling processes, recent evidence from animal studies suggests that NAD(P) also functions in the extracellular compartment (ECC). Extracellular NAD(P) [eNAD(P)] can either directly bind to plasma membrane receptors or be metabolized by ecto-enzymes to produce cyclic ADP-ribose and nicotinic acid adenine dinucleotide phosphate, and/or may ADP-ribosylate cell-surface receptors, resulting in activation of transmembrane signaling. In this study, we report that, in plants, exogenous NAD(P) induces the expression of pathogenesis-related (PR) genes and resistance to the bacterial pathogen Pseudomonas syringae pv. maculicola ES4326. Chelation of Ca(2+) by EGTA significantly inhibits the induction of PR genes by exogenous NAD(P), suggesting that exogenous NAD(P) may induce PR genes through a pathway that involves Ca(2+) signaling. We show that exogenous application of NAD(P) causes accumulation of the defense signal molecule salicylic acid (SA), and induces both SA/NPR1-dependent and -independent PR gene expression and disease resistance. Furthermore, we demonstrate that NAD(P) leaks into the plant ECC after mechanical wounding and pathogen infection, and that the amount of NAD(P) leaking into the ECC after P. syringae pv. tobacco DC3000/avrRpt2 infection is sufficient for induction of both PR gene expression and disease resistance. We propose that NAD(P) leakage from cells losing membrane integrity upon environmental stress may function as an elicitor to activate plant defense responses. Our data provide evidence that eNAD(P) functions in plant signaling, and illustrate the potential importance of eNAD(P) in plant innate immunity.
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Affiliation(s)
- Xudong Zhang
- Department of Microbiology and Cell Science, University of Florida, PO Box 110700, Gainesville, FL 32611, USA
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Salmina AB, Okuneva OS, Malinovskaya NA, Taranushenko TE, Morgun AV, Mantorova NS, Mikhutkina SV. NAD+-dependent mechanisms of disturbances of viability of brain cells during the acute period of hypoxic-ischemic perinatal injury. NEUROCHEM J+ 2008. [DOI: 10.1134/s1819712408030136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Jia SJ, Jin S, Zhang F, Yi F, Dewey WL, Li PL. Formation and function of ceramide-enriched membrane platforms with CD38 during M1-receptor stimulation in bovine coronary arterial myocytes. Am J Physiol Heart Circ Physiol 2008; 295:H1743-52. [PMID: 18723763 DOI: 10.1152/ajpheart.00617.2008] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
CD38 contains an ADP ribosylcyclase domain that mediates intracellular Ca(2+) signaling by the production of cyclic ADP-ribose (cADPR), but the mechanisms by which the agonists activate this enzyme remain unclear. The present study tested a hypothesis that a special lipid-raft (LR) form, ceramide-enriched lipid platform, contributes to CD38 activation to produce cADPR in response to muscarinic type 1 (M(1)) receptor stimulation in bovine coronary arterial myocytes (CAMs). By confocal microscopic analysis, oxotremorine (Oxo), an M(1) receptor agonist, was found to increase LR clustering on the membrane with the formation of a complex of CD38 and LR components such as GM(1), acid sphingomyelinase (ASMase), and ceramide, a typical ceramide-enriched macrodomain. At 80 microM, Oxo increased LR clustering by 78.8%, which was abolished by LR disruptors, methyl-beta-cyclodextrin (MCD), or filipin. With the use of a fluorescence resonance energy transfer (FRET) technique, 15.5+/-1.9% energy transfer rate (vs. 5.3+/-0.9% of control) between CD38 and LR component, ganglioside M(1) was detected, further confirming the proximity of both molecules. In the presence of MCD or filipin, there were no FRET signals detected. In floated detergent-resistant membrane fractions, CD38 significantly increased in LR fractions of CAMs treated by Oxo. Moreover, MCD or filipin attenuated Oxo-induced production of cADPR via CD38. Functionally, Oxo-induced intracellular Ca(2+) release and coronary artery constriction via cADPR were also blocked by LR disruption or ASMase inhibition. These results provide the first evidence that the formation of ceramide-enriched lipid macrodomains is crucial for Oxo-induced activation of CD38 to produce cADPR in CAMs, and these lipid macrodomains mediate transmembrane signaling of M(1) receptor activation to produce second messenger cADPR.
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Affiliation(s)
- Su-Jie Jia
- Department of Pharmacology and Toxicology, Medical College of Virginia, Virginia Commonwealth University, Richmond, Virginia 23298, USA
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Billington RA, Travelli C, Ercolano E, Galli U, Roman CB, Grolla AA, Canonico PL, Condorelli F, Genazzani AA. Characterization of NAD uptake in mammalian cells. J Biol Chem 2008; 283:6367-74. [PMID: 18180302 DOI: 10.1074/jbc.m706204200] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Recent evidence has shown that NAD(P) plays a variety of roles in cell-signaling processes. Surprisingly, the presence of NAD(P) utilizing ectoenzymes suggests that NAD(P) is present extracellularly. Indeed, nanomolar concentrations of NAD have been found in plasma and other body fluids. Although very high concentrations of NAD have been shown to enter cells, it is not known whether lower, more physiological concentrations are able to be taken up. Here we show that two mammalian cell types are able to transport low NAD concentrations effectively. Furthermore, extracellular application of NAD was able to counteract FK866-induced cell death and restore intracellular NAD(P) levels. We propose that NAD uptake may play a role in physiological NAD homeostasis.
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Affiliation(s)
- Richard A Billington
- Dipartimento di Scienze Chimiche, Alimentari, Farmaceutiche e Farmacologiche and the Drug and Food Biotechnology Center, Università del Piemonte Orientale, Via Bovio 6, Novara, Italy.
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30
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McKenzie JL, Gan OI, Doedens M, Dick JE. Reversible cell surface expression of CD38 on CD34-positive human hematopoietic repopulating cells. Exp Hematol 2007; 35:1429-36. [PMID: 17656009 DOI: 10.1016/j.exphem.2007.05.017] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2007] [Revised: 05/10/2007] [Accepted: 05/29/2007] [Indexed: 12/13/2022]
Abstract
OBJECTIVE Although increased expression of CD38 on the surface of human CD34(+) cells is associated with differentiation, we reported recently that both lineage-negative (Lin(-)) CD34(+)CD38(-) and Lin(-)CD34(+)CD38(lo) fractions of cord blood contain primitive severe combined immunodeficient (SCID)-repopulating cells (SRC). Thus, it is important to determine if a hierarchical relationship exists between the SRC from these two populations or if CD38 is reversibly expressed. MATERIALS AND METHODS To determine if SRC from the CD34(+)CD38(-) and CD34(+)CD38(lo) cell fractions could generate SRC of the same and/or alternate CD38 expression, cells from primary nonobese diabetic/SCID mice transplanted with CD34(+)CD38(-) cells were resorted into both CD34(+)CD38(-) and CD34(+)CD38(lo) fractions and injected into separate secondary recipients, which were evaluated for human cell engraftment 7 to 10 weeks later. As primary mice transplanted with CD34(+)CD38(lo) cells also contained cells of both immunophenotype, these cells were also resorted and transplanted into separate secondary recipients. The cell-cycle status of various CD34(+) SRC fractions were evaluated using Hoechst 33342 and Pyronin Y staining in order to determine if CD38 expression was coordinated with divisional activation. RESULTS Each cell fraction obtained from primary recipients was able to reconstitute secondary mice, indicating that CD38 expression reversibly oscillates between negative and low levels on CD34(+) repopulating cells. CD38 expression on repopulating cells correlated with a transition between the G(0) and G(1) phases of the cell cycle. CONCLUSION CD38 is reversibly expressed on CD34(+) SRC between negative and low levels and corresponds to a change in the cell-cycle state. These observations establish a foundation to uncover the molecular program of stem cell regulation and underscore the importance of functional assessments when isolating and characterizing human hematopoietic stem cells.
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Affiliation(s)
- Joby L McKenzie
- Division of Cell and Molecular Biology, University Health Network, Toronto, Ontario, Canada
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Higashida H, Salmina AB, Olovyannikova RY, Hashii M, Yokoyama S, Koizumi K, Jin D, Liu HX, Lopatina O, Amina S, Islam MS, Huang JJ, Noda M. Cyclic ADP-ribose as a universal calcium signal molecule in the nervous system. Neurochem Int 2007; 51:192-9. [PMID: 17664018 DOI: 10.1016/j.neuint.2007.06.023] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2007] [Revised: 05/30/2007] [Accepted: 06/01/2007] [Indexed: 01/09/2023]
Abstract
beta-NAD(+) is as abundant as ATP in neuronal cells. beta-NAD(+) functions not only as a coenzyme but also as a substrate. beta-NAD(+)-utilizing enzymes are involved in signal transduction. We focus on ADP-ribosyl cyclase/CD38 which synthesizes cyclic ADP-ribose (cADPR), a universal Ca(2+) mobilizer from intracellular stores, from beta-NAD(+). cADPR acts through activation/modulation of ryanodine receptor Ca(2+) releasing Ca(2+) channels. cADPR synthesis in neuronal cells is stimulated or modulated via different pathways and various factors. Subtype-specific coupling of various neurotransmitter receptors with ADP-ribosyl cyclase confirms the involvement of the enzyme in signal transduction in neurons and glial cells. Moreover, cADPR/CD38 is critical in oxytocin release from the hypothalamic cell dendrites and nerve terminals in the posterior pituitary. Therefore, it is possible that pharmacological manipulation of intracellular cADPR levels through ADP-ribosyl cyclase activity or synthetic cADPR analogues may provide new therapeutic opportunities for treatment of neurodevelopmental disorders.
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Affiliation(s)
- Haruhiro Higashida
- Department of Biophysical Genetics, Kanazawa University Graduate School of Medicine, Kanazawa 920-8640, Japan.
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Billington RA, Bruzzone S, De Flora A, Genazzani AA, Koch-Nolte F, Ziegler M, Zocchi E. Emerging functions of extracellular pyridine nucleotides. Mol Med 2007. [PMID: 17380199 DOI: 10.2119/2006-00075.billington] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
In addition to the well-known metabolic functions of NAD and NADP, it is rapidly emerging that these 2 pyridine nucleotides and their derivatives also play important roles in cell signaling. Surprisingly, a number of NAD(P) metabolizing enzymes and NAD(P) targets have been found on the outer surface of the plasma membrane and the presence of NAD has been confirmed in extracellular fluids. These findings have opened the door to a new field of research aimed at elucidating the contribution of extracellular pyridine nucleotides in physiological signaling pathways and pathological conditions.
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Affiliation(s)
- Richard A Billington
- DiSCAFF and the DFB Centre, Università del Piemonte Orientale, Via Bovio 6, 28100 Novara, Italy
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Billington RA, Bruzzone S, De Flora A, Genazzani AA, Koch-Nolte F, Ziegler M, Zocchi E. Emerging functions of extracellular pyridine nucleotides. MOLECULAR MEDICINE (CAMBRIDGE, MASS.) 2007; 12:324-7. [PMID: 17380199 PMCID: PMC1829198 DOI: 10.2119/2006–00075.billington] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/15/2006] [Accepted: 12/19/2006] [Indexed: 11/06/2022]
Abstract
In addition to the well-known metabolic functions of NAD and NADP, it is rapidly emerging that these 2 pyridine nucleotides and their derivatives also play important roles in cell signaling. Surprisingly, a number of NAD(P) metabolizing enzymes and NAD(P) targets have been found on the outer surface of the plasma membrane and the presence of NAD has been confirmed in extracellular fluids. These findings have opened the door to a new field of research aimed at elucidating the contribution of extracellular pyridine nucleotides in physiological signaling pathways and pathological conditions.
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Affiliation(s)
- Richard A Billington
- DiSCAFF and the DFB Centre, Università del Piemonte Orientale, Via Bovio 6, 28100 Novara, Italy
| | - Santina Bruzzone
- DIMES, Section of Biochemistry, and Center of Excellence for Biomedical Research, University of Genova, Viale Benedetto XV/1, 16132, Genova, Italy
| | - Antonio De Flora
- DIMES, Section of Biochemistry, and Center of Excellence for Biomedical Research, University of Genova, Viale Benedetto XV/1, 16132, Genova, Italy
| | - Armando A Genazzani
- DiSCAFF and the DFB Centre, Università del Piemonte Orientale, Via Bovio 6, 28100 Novara, Italy
- Address correspondence and reprint requests to Armando Genazzani, DiSCAFF, Via Bovio 6, 28100 Novara, Italy, Phone: 0039 0321 375827; Fax: 0039 0321 375821; e-mail:
| | - Friedrich Koch-Nolte
- Institute of Immunology, Dept. of Clinical Pathology, University Medical Center Hamburg-Eppendorf, D-20246 Hamburg, Germany
| | - Mathias Ziegler
- Department of Molecular Biology, University of Bergen, Thormohlensgt. 55, 5020 Bergen, Norway
| | - Elena Zocchi
- DIMES, Section of Biochemistry, and Center of Excellence for Biomedical Research, University of Genova, Viale Benedetto XV/1, 16132, Genova, Italy
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Rah SY, Park KH, Nam TS, Kim SJ, Kim H, Im MJ, Kim UH. Association of CD38 with Nonmuscle Myosin Heavy Chain IIA and Lck Is Essential for the Internalization and Activation of CD38. J Biol Chem 2007; 282:5653-60. [PMID: 17182620 DOI: 10.1074/jbc.m609478200] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Activation of CD38 in lymphokine-activated killer (LAK) cells involves interleukin-8 (IL8)-mediated protein kinase G (PKG) activation and results in an increase in the sustained intracellular Ca(2+) concentration ([Ca(2+)](i)), cADP-ribose, and LAK cell migration. However, direct phosphorylation or activation of CD38 by PKG has not been observed in vitro. In this study, we examined the molecular mechanism of PKG-mediated activation of CD38. Nonmuscle myosin heavy chain IIA (MHCIIA) was identified as a CD38-associated protein upon IL8 stimulation. The IL8-induced association of MHCIIA with CD38 was dependent on PKG-mediated phosphorylation of MHCIIA. Supporting these observations, IL8- or cell-permeable cGMP analog-induced formation of cADP-ribose, increase in [Ca(2+)](i), and migration of LAK cells were inhibited by treatment with the MHCIIA inhibitor blebbistatin. Binding studies using purified proteins revealed that the association of MHCIIA with CD38 occurred through Lck, a tyrosine kinase. Moreover, these three molecules co-immunoprecipitated upon IL8 stimulation of LAK cells. IL8 treatment of LAK cells resulted in internalization of CD38, which co-localized with MHCIIA and Lck, and blebbistatin blocked internalization of CD38. These findings demonstrate that the association of phospho-MHCIIA with Lck and CD38 is a critical step in the internalization and activation of CD38.
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Affiliation(s)
- So-Young Rah
- Department of Biochemistry, Chonbuk National University Medical School, Jeonju 561-182, Republic of Korea
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35
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Rogers RC, Van Meter MJ, Hermann GE. Tumor necrosis factor potentiates central vagal afferent signaling by modulating ryanodine channels. J Neurosci 2006; 26:12642-6. [PMID: 17151266 PMCID: PMC6674848 DOI: 10.1523/jneurosci.3530-06.2006] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Disease processes such as infection, leukemia, and autoimmune disorders are often associated with nausea, emesis, and anorexia. A common denominator of these rather disparate states is the production of the early, proinflammatory cytokine tumor necrosis factor-alpha (TNF) in significant quantities. Recent studies have shown that TNF may act as a neuromodulator in the hindbrain to produce malaise by potentiating visceral afferent signaling at the central processes of the vagus nerve. However, the mechanism by which TNF produces this signal amplification is not known. Our time-lapse calcium imaging studies of individual central vagal afferent varicosities in the caudal brainstem slice preparation show that, although TNF has minimal direct effects to elevate terminal intracellular calcium levels, TNF does potentiate the terminal afferent responses to other stimuli through a ryanodine-based, calcium-induced calcium release mechanism. Such a scheme may explain how TNF sensitizes visceral as well as somatosensory primary afferents.
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Affiliation(s)
- Richard C Rogers
- Laboratory of Autonomic Neuroscience, Pennington Biomedical Research Center, Baton Rouge, Louisiana 70808, USA.
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36
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Massullo P, Sumoza-Toledo A, Bhagat H, Partida-Sánchez S. TRPM channels, calcium and redox sensors during innate immune responses. Semin Cell Dev Biol 2006; 17:654-66. [PMID: 17178241 DOI: 10.1016/j.semcdb.2006.11.006] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Melastatin-related TRPM ion channels have emerged as novel therapeutic targets due to their potential ability to modulate the function and fate of immune cells during inflammation, innate, and adaptive immunity. Four family members, TRPM1, TRPM2, TRPM4 and TRPM7 have a strong presence in the immune system. TRPM channels regulate ion-homeostasis by sensing cellular redox status and cytoplasmic calcium levels. TRPM2 for example, is highly expressed in phagocytes. This channel is activated by intracellular ADP-ribose upon exposure to oxidative stress and induces cell death. Here we will review the functional links between TRPM-mediated ion conductance, chemotaxis, apoptosis, and innate immunity.
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Affiliation(s)
- Pam Massullo
- Columbus Children's Research Institute, Center for Microbial Pathogenesis, The Ohio State University, Columbus, OH 43205, USA
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Pande AH, Moe D, Jamnadas M, Tatulian SA, Teter K. The Pertussis Toxin S1 Subunit Is a Thermally Unstable Protein Susceptible to Degradation by the 20S Proteasome†. Biochemistry 2006; 45:13734-40. [PMID: 17105192 PMCID: PMC2518456 DOI: 10.1021/bi061175+] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Pertussis toxin (PT) is an AB-type protein toxin that consists of a catalytic A subunit (PT S1) and an oligomeric, cell-binding B subunit. It belongs to a subset of AB toxins that move from the cell surface to the endoplasmic reticulum (ER) before the A chain passes into the cytosol. Toxin translocation is thought to involve A chain unfolding in the ER and the quality control mechanism of ER-associated degradation (ERAD). The absence of lysine residues in PT S1 may allow the translocated toxin to avoid ubiquitin-dependent degradation by the 26S proteasome, which is the usual fate of exported ERAD substrates. As the conformation of PT S1 appears to play an important role in toxin translocation, we used biophysical and biochemical methods to examine the structural properties of PT S1. Our in vitro studies found that the isolated PT S1 subunit is a thermally unstable protein that can be degraded in a ubiquitin-independent fashion by the core 20S proteasome. The thermal denaturation of PT S1 was inhibited by its interaction with NAD, a donor molecule used by PT S1 for the ADP ribosylation of target G proteins. These observations support a model of intoxication in which toxin translocation, degradation, and activity are all influenced by the heat-labile nature of the isolated toxin A chain.
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Affiliation(s)
- Abhay H. Pande
- Department of Molecular Biology and Microbiology, University of Central Florida, 12722 Research Parkway, Orlando, FL 32826
- Biomolecular Science Center, University of Central Florida, 12722 Research Parkway, Orlando, FL 32826
| | - David Moe
- Department of Molecular Biology and Microbiology, University of Central Florida, 12722 Research Parkway, Orlando, FL 32826
- Biomolecular Science Center, University of Central Florida, 12722 Research Parkway, Orlando, FL 32826
| | - Maneesha Jamnadas
- Department of Molecular Biology and Microbiology, University of Central Florida, 12722 Research Parkway, Orlando, FL 32826
| | - Suren A. Tatulian
- Biomolecular Science Center, University of Central Florida, 12722 Research Parkway, Orlando, FL 32826
| | - Ken Teter
- Department of Molecular Biology and Microbiology, University of Central Florida, 12722 Research Parkway, Orlando, FL 32826
- Biomolecular Science Center, University of Central Florida, 12722 Research Parkway, Orlando, FL 32826
- To whom correspondence should be addressed: Tel. (407) 882-2247; Fax: (407) 384-2062;
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Gerlach G, Reidl J. NAD+ utilization in Pasteurellaceae: simplification of a complex pathway. J Bacteriol 2006; 188:6719-27. [PMID: 16980474 PMCID: PMC1595515 DOI: 10.1128/jb.00432-06] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Affiliation(s)
- Gabriele Gerlach
- Institut für Hygiene und Mikrobiologie, Universität Würzburg, Josef Schneider Str. 2, E1, 97080 Würzburg, Germany
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Bruzzone S, Moreschi I, Guida L, Usai C, Zocchi E, De Flora A. Extracellular NAD+ regulates intracellular calcium levels and induces activation of human granulocytes. Biochem J 2006; 393:697-704. [PMID: 16225456 PMCID: PMC1360722 DOI: 10.1042/bj20051302] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Beta-NAD+e (extracellular beta-NAD+), present at nanomolar levels in human plasma, has been implicated in the regulation of [Ca2+]i (the intracellular calcium concentration) in various cell types, including blood cells, by means of different mechanisms. Here, we demonstrate that micromolar NAD+e (both the alpha and the beta extracellular NAD+ forms) induces a sustained [Ca2+]i increase in human granulocytes by triggering the following cascade of causally related events: (i) activation of adenylate cyclase and overproduction of cAMP; (ii) activation of protein kinase A; (iii) stimulation of ADP-ribosyl cyclase activity and consequent overproduction of cADP-ribose, a universal Ca2+ mobilizer; and (iv) influx of extracellular Ca2+. The NAD+e-triggered [Ca2+]i elevation translates into granulocyte activation, i.e. superoxide and nitric oxide generation, and enhanced chemotaxis in response to 0.1-10 microM NAD+e. Thus extracellular beta-NAD+e behaves as a novel pro-inflammatory cytokine, stimulating human granulocytes and potentially recruiting them at sites of inflammation.
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Affiliation(s)
- Santina Bruzzone
- *Department of Experimental Medicine, Section of Biochemistry, and Center of Excellence for Biomedical Research, University of Genova, Viale Benedetto XV/1, 16132 Genova, Italy
| | - Iliana Moreschi
- *Department of Experimental Medicine, Section of Biochemistry, and Center of Excellence for Biomedical Research, University of Genova, Viale Benedetto XV/1, 16132 Genova, Italy
| | - Lucrezia Guida
- *Department of Experimental Medicine, Section of Biochemistry, and Center of Excellence for Biomedical Research, University of Genova, Viale Benedetto XV/1, 16132 Genova, Italy
| | - Cesare Usai
- †Institute of Biophysics, CNR, Via De Marini 6, 16149 Genova, Italy
| | - Elena Zocchi
- *Department of Experimental Medicine, Section of Biochemistry, and Center of Excellence for Biomedical Research, University of Genova, Viale Benedetto XV/1, 16132 Genova, Italy
| | - Antonio De Flora
- *Department of Experimental Medicine, Section of Biochemistry, and Center of Excellence for Biomedical Research, University of Genova, Viale Benedetto XV/1, 16132 Genova, Italy
- To whom correspondence should be addressed (email )
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Zhang F, Zhang G, Zhang AY, Koeberl MJ, Wallander E, Li PL. Production of NAADP and its role in Ca2+ mobilization associated with lysosomes in coronary arterial myocytes. Am J Physiol Heart Circ Physiol 2006; 291:H274-82. [PMID: 16473958 DOI: 10.1152/ajpheart.01064.2005] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The present study was designed to determine the production of nicotinic acid adenine dinucleotide phosphate (NAADP) and its role associated with lysosomes in mediating endothelin-1 (ET-1)-induced vasoconstriction in coronary arteries. HPLC assay showed that NAADP was produced in coronary arterial smooth muscle cells (CASMCs) via endogenous ADP-ribosyl cyclase. Fluorescence microscopic analysis of intracellular Ca2+ concentration ([Ca2+]i) in CASMCs revealed that exogenous 100 nM NAADP increased [Ca2+]i by 711 +/- 47 nM. Lipid bilayer experiments, however, demonstrated that NAADP did not directly activate ryanodine (Rya) receptor Ca2+ release channels on the sarcoplasmic reticulum. In CASMCs pretreated with 100 nM bafilomycin A1 (Baf), an inhibitor of lysosomal Ca2+ release and vacuolar proton pump function, NAADP-induced [Ca2+]i increase was significantly abolished. Moreover, ET-1 significantly increased NAADP formation in CASMCs and resulted in the rise of [Ca2+]i in these cells with a large increase in global Ca2+ level of 1,815 +/- 84 nM. Interestingly, before this large Ca2+ increase, a small Ca2+ spike with an increase in [Ca2+]i of 529 +/- 32 nM was observed. In the presence of Baf (100 nM), this ET-1-induced two-phase [Ca2+]i response was completely abolished, whereas Rya (50 microM) only markedly blocked the ET-1-induced large global Ca2+ increase. Functional studies showed that 100 nM Baf significantly attenuated ET-1-induced maximal constriction from 82.26 +/- 4.42% to 51.80 +/- 4.36%. Our results suggest that a lysosome-mediated Ca2+ regulatory mechanism via NAADP contributes to ET-1-induced Ca2+ mobilization in CASMCs and consequent vasoconstriction of coronary arteries.
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Affiliation(s)
- Fan Zhang
- Department of Pharmacology and Toxicology, Medical College of Virginia, Virginia Commonwealth University, Richmond, VA 23298, USA
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Bréchard S, Brunello A, Bueb JL, Tschirhart EJ. Modulation by cADPr of Ca2+ mobilization and oxidative response in dimethylsulfoxide- or retinoic acid-differentiated HL-60 cells. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2005; 1763:129-36. [PMID: 16413069 DOI: 10.1016/j.bbamcr.2005.12.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2005] [Revised: 11/17/2005] [Accepted: 12/05/2005] [Indexed: 11/18/2022]
Abstract
In human phagocytic cells, reactive oxygen species (ROS) generation in response to N-formyl-L-Methionyl-L-Leucyl-L-Phenylalanine (fMLF) is largely dependent on cytosolic free calcium concentration ([Ca2+]i). Cyclic ADP-ribose (cADPr) is able to regulate Ca2+ release from intracellular stores through the ryanodine receptor but its potential role in biological responses has so far not been determined. In this study, we examined whether extracellular and intracellular cADPr is required in fMLF-induced [Ca2+]i rise and consequently in the oxidative response in human neutrophil-like HL-60 cells differentiated with dimethylsulfoxide or all-trans-retinoic acid (ATRA). We establish that extracellular cADPr cannot elicit [Ca2+]i elevation. Furthermore, we demonstrate that 8-Br-cADPr, a functional antagonist of cADPr, inhibits Ca2+ entry into HL-60 cells differentiated with ATRA and stimulated with fMLF (95+/-4 and 148+/-5 nM respectively, n=3). Finally, we show that this partial inhibition of Ca2+ mobilization is unrelated to ROS production (10.0+/-0.3 vs. 9.6+/-0.5 A.U., n=3). In conclusion, we showed that cADPr can control fMLF-induced Ca2+ influx but is unable to regulate a Ca2+-dependent biological response, i.e. H2O2 production.
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Affiliation(s)
- S Bréchard
- Laboratoire de Biologie et Physiologie Intégrée. Faculté des Sciences, de la Technologie et de la Communication. Université du Luxembourg, Luxembourg
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42
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Pinkas-Sarafova A, Markova NG, Simon M. Dynamic changes in nicotinamide pyridine dinucleotide content in normal human epidermal keratinocytes and their effect on retinoic acid biosynthesis. Biochem Biophys Res Commun 2005; 336:554-64. [PMID: 16164943 DOI: 10.1016/j.bbrc.2005.08.131] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2005] [Accepted: 08/18/2005] [Indexed: 01/25/2023]
Abstract
The function of many enzymes that regulate metabolism and transcription depends critically on the nicotinamide pyridine dinucleotides. To understand the role of NAD(P)(H) in physiology and pathophysiology, it is imperative to estimate both their amount and ratios in a given cell type. In human epidermis and in cultured epidermal keratinocytes, we found that the total dinucleotide content is in the low millimolar range. The dinucleotide pattern changes during proliferation and maturation of keratinocytes in culture. Differences in the concentrations of NAD(P)(H) of 1.5- to 12-fold were observed. This resulted in alteration of the NAD(P)H/NAD(P) ratio, which could impact the differential regulation of both transcriptional and metabolic processes. In support of this notion, we provide evidence that the two-step oxidation of retinol to retinoic acid, a nuclear hormone critical for epidermal homeostasis, can be regulated by the relative physiological amounts of the pyridine dinucleotides.
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Affiliation(s)
- Adriana Pinkas-Sarafova
- Living Skin Bank, Department of Oral Biology and Pathology, School of Dental Medicine, SUNY Stony Brook, Stony Brook, NY 11794-8702, USA.
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43
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Heidemann AC, Schipke CG, Kettenmann H. Extracellular application of nicotinic acid adenine dinucleotide phosphate induces Ca2+ signaling in astrocytes in situ. J Biol Chem 2005; 280:35630-40. [PMID: 16061474 DOI: 10.1074/jbc.m507338200] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Nicotinic acid adenine dinucleotide phosphate (NAADP+) has been identified as a novel second messenger triggering Ca2+ release from intracellular stores. Here we report that murine cortical astrocytes in culture and in acute slices respond with transient intracellular Ca2+ increases to extracellularly applied NAADP+ and express the NAADP+-producing enzyme CD38. The Ca2+ transients triggered by NAADP+ occurred with an average delay of 35 s as compared with ATP-triggered Ca2+ signaling, suggesting that NAADP+ may have to enter the cell to act. Blockage of connexin hemichannels (a possible entry route for NAADP+ into the cell) reduced the number of astrocytes responding to NAADP+. Disruption of lysosomes as the suggested site of NAADP+ receptors reduced the number of astrocytes responding to NAADP+ strongly. The NAADP+-triggered Ca2+ signal also depended on intact endoplasmic reticulum Ca2+ stores linked to activation of inositol 1,4,5-trisphosphate receptors and on the activity of voltage-gated Ca2+ channels. Adenosine receptor-mediated signaling contributes to the NAADP+-evoked signal, since it is strongly reduced by the adenosine receptor blocker CGS-15943. Moreover, NAADP+ triggered responses in all other cell types (cultured cerebellar neurons, microglia, and oligodendrocytes) of the central nervous system.
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Affiliation(s)
- Antje C Heidemann
- Max-Delbrück-Center for Molecular Medicine, Cellular Neuroscience, 10 Robert-Rössle-Strasse, Berlin D-13092, Germany
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44
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Laporte R, Hui A, Laher I. Pharmacological modulation of sarcoplasmic reticulum function in smooth muscle. Pharmacol Rev 2005; 56:439-513. [PMID: 15602008 DOI: 10.1124/pr.56.4.1] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The sarco/endoplasmic reticulum (SR/ER) is the primary storage and release site of intracellular calcium (Ca2+) in many excitable cells. The SR is a tubular network, which in smooth muscle (SM) cells distributes close to cellular periphery (superficial SR) and in deeper aspects of the cell (deep SR). Recent attention has focused on the regulation of cell function by the superficial SR, which can act as a buffer and also as a regulator of membrane channels and transporters. Ca2+ is released from the SR via two types of ionic channels [ryanodine- and inositol 1,4,5-trisphosphate-gated], whereas accumulation from thecytoplasm occurs exclusively by an energy-dependent sarco-endoplasmic reticulum Ca2+-ATPase pump (SERCA). Within the SR, Ca2+ is bound to various storage proteins. Emerging evidence also suggests that the perinuclear portion of the SR may play an important role in nuclear transcription. In this review, we detail the pharmacology of agents that alter the functions of Ca2+ release channels and of SERCA. We describe their use and selectivity and indicate the concentrations used in investigating various SM preparations. Important aspects of cell regulation and excitation-contractile activity coupling in SM have been uncovered through the use of such activators and inhibitors of processes that determine SR function. Likewise, they were instrumental in the recent finding of an interaction of the SR with other cellular organelles such as mitochondria. Thus, an appreciation of the pharmacology and selectivity of agents that interfere with SR function in SM has greatly assisted in unveiling the multifaceted nature of the SR.
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Affiliation(s)
- Régent Laporte
- Ferring Research Institute, Inc., Ferring Pharmaceuticals, San Diego, California, USA
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45
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Abstract
NAD+ and its metabolites serve important functions in intracellular signalling. NAD+-mediated regulatory processes also take place on the cell surface, particularly of immune cells. In this issue of the Biochemical Journal, Gerth et al. have demonstrated a new mechanism of Ca2+ uptake into monocytes which is triggered by NAD+ or its degradation product, ADP-ribose. These observations point to a hitherto unknown Ca2+-influx mechanism and underscore the potential significance of NAD+ and ADP-ribose as signalling molecules on the extracellular side of the plasma membrane.
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Affiliation(s)
- Mathias Ziegler
- Department of Molecular Biology, University of Bergen, Thormøhlensgt. 55, 5020 Bergen, Norway.
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46
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Gerth A, Nieber K, Oppenheimer N, Hauschildt S. Extracellular NAD+ regulates intracellular free calcium concentration in human monocytes. Biochem J 2005; 382:849-56. [PMID: 15233622 PMCID: PMC1133960 DOI: 10.1042/bj20040979] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2004] [Revised: 06/30/2004] [Accepted: 07/02/2004] [Indexed: 01/07/2023]
Abstract
Ca(2+) ions play a critical role in the biochemical cascade of signal transduction pathways, leading to the activation of immune cells. In the present study, we show that the exposure of freshly isolated human monocytes to NAD(+) results in a rapid concentration-dependent elevation of [Ca(2+)](i) (intracellular free Ca(2+) concentration) caused by the influx of extracellular Ca(2+). NAD(+) derivatives containing a modified adenine or nicotinamide ring failed to trigger a Ca(2+) increase. Treating monocytes with ADPR (ADP-ribose), a major degradation product of NAD(+), also resulted in a rise in [Ca(2+)](i). Selective inhibition of CD38, an NAD-glycohydrolase that generates free ADPR from NAD(+), does not abolish the effect of NAD(+), excluding the possibility that NAD(+) might act via ADPR. The NAD(+)-induced Ca(2+) response was prevented by the prior addition of ADPR and vice versa, indicating that both compounds share some mechanisms mediating the rise in [Ca(2+)](i). NAD(+), as well as ADPR, were ineffective when applied following ATP, suggesting that ATP controls events that intersect with NAD(+) and ADPR signalling.
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Affiliation(s)
- Anja Gerth
- *Department of Immunobiology, Institute of Zoology, University of Leipzig, Liebigstrasse 18, D-04103 Leipzig, Germany
| | - Karen Nieber
- †Department of Pharmacology for Natural Sciences, Institute of Pharmacy, University of Leipzig, Liebigstrasse 18, D-04103 Leipzig, Germany
| | - Norman J. Oppenheimer
- ‡Department of Pharmaceutical Chemistry S-926, University of California, San Francisco, CA 94143-0446, U.S.A
| | - Sunna Hauschildt
- *Department of Immunobiology, Institute of Zoology, University of Leipzig, Liebigstrasse 18, D-04103 Leipzig, Germany
- To whom correspondence should be addressed (email )
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47
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Bai N, Lee HC, Laher I. Emerging role of cyclic ADP-ribose (cADPR) in smooth muscle. Pharmacol Ther 2004; 105:189-207. [PMID: 15670626 DOI: 10.1016/j.pharmthera.2004.10.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2004] [Accepted: 10/14/2004] [Indexed: 10/26/2022]
Abstract
Cyclic adenosine diphosphate ribose (cADPR) is a naturally occurring cyclic nucleotide and represents a novel class of endogenous Ca(2+) messengers implicated in the regulation of the gating properties of ryanodine receptors (RyRs). This action of cADPR occurs independently from the inositol-1,4,5-trisphosphate (IP(3)) receptor. The regulation of intracellular Ca(2+) release is a fundamental element of cellular Ca(2+) homeostasis since a number of smooth muscle functions (tone, proliferation, apoptosis, and gene expression) are modulated by intracellular Ca(2+) concentration ([Ca(2+)](i)). There has been a surge in the efforts aimed at understanding the mechanisms of cADPR-mediated Ca(2+) mobilization and its impact on smooth muscle function. This review summarizes the proposed roles of cADPR in the regulation of smooth muscle tone.
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Affiliation(s)
- Ni Bai
- Department of Pharmacology and Therapeutics, University of British Columbia Vancouver, BC, Canada V6T 1Z3
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48
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McCarthy TV, Datar S, Mackrill JJ. Activation of ryanodine receptor/Ca2+ release channels downregulates CD38 in the Namalwa B lymphoma. FEBS Lett 2003; 554:133-7. [PMID: 14596927 DOI: 10.1016/s0014-5793(03)01122-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
CD38 is a multifunctional ectoenzyme that catalyses formation of cyclic ADP ribose (cADPr), a second messenger that opens ryanodine receptor (RyR) Ca2+ channels. Despite its importance in signal transduction processes, little is known about the mechanisms regulating CD38 expression levels. In the current study, ryanodine stimulation of Ca2+ release in Namalwa cells decreased both CD38 protein abundance and cyclase activity. Reductions in cyclase activity were prevented by RyR antagonists, by lysosomal blockers, though not by calpain or proteasomal inhibitors. These findings indicate a novel negative feedback mechanism between RyR channel activity and CD38 abundance acts in cADPr signal transduction.
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Affiliation(s)
- Tommie V McCarthy
- Department of Biochemistry, Biosciences Institute, National University of Ireland, University College Cork, College Road, Cork, Ireland
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49
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Lacapère JJ, Boulla G, Lund FE, Primack J, Oppenheimer N, Schuber F, Deterre P. Fluorometric studies of ligand-induced conformational changes of CD38. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2003; 1652:17-26. [PMID: 14580993 DOI: 10.1016/j.bbapap.2003.07.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The lymphoid surface antigen CD38 is a NAD(+)-glycohydrolase that also catalyzes the transformation of NAD(+) into cyclic ADP-ribose, a calcium mobilizing second messenger. In addition, ligation of CD38 by antibodies triggers signaling in lymphoid cells. Since the cytoplasmic tail of CD38 is dispensable for this latter property, we have previously proposed that CD38-mediated receptor signal transduction might be regulated by its conformational state. We have now examined the molecular changes of this protein during its interaction with NAD(+) by measuring the intrinsic fluorescence of CD38. We have shown that addition of the substrate produced a dramatic decrease in the fluorescence of the catalytically active recombinant soluble ectodomain of murine CD38. Analysis of this event revealed that the catalytic cycle involves a state of the enzyme that is characterized by a low fluorescence which, upon substrate turnover, reverts to the initial high intrinsic fluorescence level. In contrast, non-hydrolyzable substrates trap CD38 in its altered low fluorescence state. Studies with the hydrophilic quencher potassium iodide revealed that the tryptophan residues that are mainly involved in the observed changes in fluorescence, are remote from the active site. Similar data were also obtained with human CD38, indicating that studies of intrinsic fluorescence will be useful in monitoring the transconformation of CD38 from different species. Together, these data demonstrate that CD38 undergoes a reversible conformational change after substrate binding, and suggest a mechanism by which this change could alter interactions with different cell-surface partners.
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Affiliation(s)
- Jean-Jacques Lacapère
- INSERM U410, Faculté de Médecine Xavier Bichat, 16 rue Henri Huchard, 75018 Paris, France
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50
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Sternfeld L, Krause E, Guse AH, Schulz I. Hormonal control of ADP-ribosyl cyclase activity in pancreatic acinar cells from rats. J Biol Chem 2003; 278:33629-36. [PMID: 12807891 DOI: 10.1074/jbc.m301043200] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Cyclic ADP-ribose, a metabolite of NAD+ evokes Ca2+ release from intracellular stores in different cells. We have determined the activity of cADPr-producing enzymes (ADP-ribosyl cyclases) in different cellular fractions prepared from isolated pancreatic acinar cells by measuring the conversion of the beta-NAD+ analogs 1,N6-etheno-NAD and nicotinamide guanine dinucleotide to the fluorescent products 1,N6-etheno-cADPr and cyclic GDP-ribose, respectively. Substrate/product analyses were carried out by reverse-phase high pressure liquid chromatography. In all subcellular fractions examined (cytosol, mitochondria, plasma, and intracellular membranes), ADP-ribosyl cyclase activity was detected except in zymogen granular membranes. Western blot analysis and immunoprecipitation experiments revealed the presence of the ADP-ribosyl cyclase CD38 in both plasma membranes and mitochondria but not in the cytosol. Hormonal stimulation of intact acinar cells for 1 min with acetylcholine (ACh), cholecystokinin (CCK), or a membrane-permeant analog of cGMP increased ADP-ribosyl cyclase activity in the cytosol by 1.8-, 1.6-, and 1.9-fold, respectively, as compared with the control but had no effect in any other fraction. Both ACh and CCK also increased accumulation of cGMP in the cells by about 2-fold. Bombesin had no significant effect on either ADP-ribosyl cyclase activity or cGMP accumulation within this short period of stimulation. We conclude that at least two types of ADP-ribosyl cyclases are present in pancreatic acinar cells: membrane-bound CD38 and a cytosolic enzyme different from CD38. Stimulation of pancreatic acinar cells with CCK or ACh results in exclusive activation of the cytosolic ADP-ribosyl cyclase activity, most likely mediated by cGMP.
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Affiliation(s)
- Lutz Sternfeld
- University of the Saarland, Institute of Physiology, Building 58, 66421 Homburg, Germany
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