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Lysophosphatidylcholine: Potential Target for the Treatment of Chronic Pain. Int J Mol Sci 2022; 23:ijms23158274. [PMID: 35955410 PMCID: PMC9368269 DOI: 10.3390/ijms23158274] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 07/22/2022] [Accepted: 07/23/2022] [Indexed: 12/26/2022] Open
Abstract
The bioactive lipid lysophosphatidylcholine (LPC), a major phospholipid component of oxidized low-density lipoprotein (Ox-LDL), originates from the cleavage of phosphatidylcholine by phospholipase A2 (PLA2) and is catabolized to other substances by different enzymatic pathways. LPC exerts pleiotropic effects mediated by its receptors, G protein-coupled signaling receptors, Toll-like receptors, and ion channels to activate several second messengers. Lysophosphatidylcholine (LPC) is increasingly considered a key marker/factor positively in pathological states, especially inflammation and atherosclerosis development. Current studies have indicated that the injury of nervous tissues promotes oxidative stress and lipid peroxidation, as well as excessive accumulation of LPC, enhancing the membrane hyperexcitability to induce chronic pain, which may be recognized as one of the hallmarks of chronic pain. However, findings from lipidomic studies of LPC have been lacking in the context of chronic pain. In this review, we focus in some detail on LPC sources, biochemical pathways, and the signal-transduction system. Moreover, we outline the detection methods of LPC for accurate analysis of each individual LPC species and reveal the pathophysiological implication of LPC in chronic pain, which makes it an interesting target for biomarkers and the development of medicine regarding chronic pain.
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2
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Tserendavga B, Ohshima N, Fujita C, Yuzawa K, Ohshima M, Yanaka N, Minamishima YA, Izumi T. Characterization of recombinant murine GDE4 and GDE7, enzymes producing lysophosphatidic acid and/or cyclic phosphatidic acid. J Biochem 2021; 170:713-727. [PMID: 34523685 DOI: 10.1093/jb/mvab091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 07/30/2021] [Indexed: 11/13/2022] Open
Abstract
GDE4 and GDE7 are membrane-bound enzymes that exhibit lysophospholipase D (lysoPLD) activities. We found that GDE7 produced not only lysophosphatidic acid (LPA) but also cyclic phosphatidic acid (cPA) from lysophospholipids by a transphosphatidylation reaction. In contrast, GDE4 produced only LPA. The analysis of substrate specificity showed that 1-alkyl-lysophosphospholipids were preferred substrates for both enzymes rather than 1-alkyl-lysophospholipids and 1-alkenyl-lysophospholipids. Among the various lysophospholipids with different polar head groups that were tested, lysophosphatidylglycerol and lysophosphatidylserine were preferred substrates for GDE4 and GDE7, respectively. The detailed analysis of the dependency of the enzyme activities of GDE4 and GDE7 on divalent cations suggested multiple divalent cations were bound in the active sites of both enzymes. Taken together, these results suggest the possibility that GDE7 functions as a cPA-producing enzyme in the body.
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Affiliation(s)
- Binderiya Tserendavga
- Department of Biochemistry, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Noriyasu Ohshima
- Department of Biochemistry, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Chiaki Fujita
- Department of Biochemistry, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Koji Yuzawa
- Group of Pharmaceutical Analysis, ENVIRONMENTAL TECHNICAL CO., LTD, Takasaki, Gunma 370-3511, Japan
| | - Mari Ohshima
- Department of Biochemistry, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan.,Group of Pharmaceutical Analysis, ENVIRONMENTAL TECHNICAL CO., LTD, Takasaki, Gunma 370-3511, Japan
| | - Noriyuki Yanaka
- Department of Molecular and Applied Bioscience, Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8528, Japan
| | - Yoji Andrew Minamishima
- Department of Biochemistry, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Takashi Izumi
- Department of Biochemistry, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan.,Faculty of Health Care, Teikyo Heisei University, Tokyo, 170-8445, Japan
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3
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Shibaike Y, Gotoh M, Ogawa C, Nakajima S, Yoshikawa K, Kobayashi T, Murakami-Murofushi K. 2-Carba cyclic phosphatidic acid inhibits lipopolysaccharide-induced prostaglandin E2 production in a human macrophage cell line. Biochem Biophys Rep 2019; 19:100668. [PMID: 31367683 PMCID: PMC6651843 DOI: 10.1016/j.bbrep.2019.100668] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 07/16/2019] [Accepted: 07/16/2019] [Indexed: 12/25/2022] Open
Abstract
Cyclic phosphatidic acid (cPA) is a naturally occurring phospholipid mediator that contains a unique cyclic phosphate ring at the sn-2 and sn-3 positions of its glycerol backbone. Using mouse models for multiple sclerosis (cuprizone-induced demyelination and experimental autoimmune encephalomyelitis) and traumatic brain injury, we revealed that cPA and its metabolically stabilized cPA derivative, 2-carba-cPA (2ccPA), have potential to protect against neuroinflammation. In this study, we investigated whether 2ccPA has anti-inflammatory effect on peripheral immune function or not using inflammation-induced macrophages-like cell line, THP-1 monocytes differentiated by phorbol 12-myristate 13-acetate (PMA). Lipopolysaccharide (LPS)-stimulated THP-1 cells were found to have higher expression of the mRNAs of several inflammation-related cytokines and of the enzyme cyclooxygenase-2 (Cox-2); however, when THP-1 cells were stimulated by LPS in the presence of 2ccPA, the increase in the expression of pro-inflammatory cytokine and Cox-2 mRNA was attenuated. 2ccPA treatment also decreased the amount of prostaglandin E2 (PGE2) produced by LPS-stimulated THP-1 cells and decreased expression of the mRNA of prostaglandin E receptor 2 (EP2, PTGER2), a PGE2 receptor that mediates inflammation. These results indicate that 2ccPA has anti-inflammatory properties. 2-Carba cyclic phosphatidic acid inhibits prostaglandin E2 production. 2-Carba cyclic phosphatidic acid has anti-inflammatory effect. 2-Carba cyclic phosphatidic acid has effect on peripheral immune function.
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Affiliation(s)
- Yuki Shibaike
- Endowed Research Division of Beauty and Science, Ochanomizu University, 2-1-1 Ohtsuka, Bunkyo-ku, Tokyo, 112-8610, Japan.,Research Organization for the Promotion of Global Women's Leadership, Ochanomizu University, 2-1-1 Ohtsuka, Bunkyo-ku, Tokyo, 112-8610, Japan
| | - Mari Gotoh
- Endowed Research Division of Beauty and Science, Ochanomizu University, 2-1-1 Ohtsuka, Bunkyo-ku, Tokyo, 112-8610, Japan.,Institute for Human Life Innovation, Ochanomizu University, 2-1-1 Ohtsuka, Bunkyo-ku, Tokyo, 112-8610, Japan
| | - Chinatsu Ogawa
- Graduate School of Humanities and Sciences, Ochanomizu University, 2-1-1 Ohtsuka, Bunkyo-ku, Tokyo, 112-8610, Japan
| | - Shingo Nakajima
- Endowed Research Division of Beauty and Science, Ochanomizu University, 2-1-1 Ohtsuka, Bunkyo-ku, Tokyo, 112-8610, Japan.,Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry (NCNP), 4-1-1, Ogawa-Higashi, Kodaira, Tokyo, Japan
| | - Keisuke Yoshikawa
- Department of Pharmacology, Faculty of Medicine, Saitama Medical University, 38 Moro-hongo, Moroyama-machi, Iruma-gun, Saitama, 350-0495, Japan
| | - Tetsuyuki Kobayashi
- Institute for Human Life Innovation, Ochanomizu University, 2-1-1 Ohtsuka, Bunkyo-ku, Tokyo, 112-8610, Japan.,Graduate School of Humanities and Sciences, Ochanomizu University, 2-1-1 Ohtsuka, Bunkyo-ku, Tokyo, 112-8610, Japan
| | - Kimiko Murakami-Murofushi
- Endowed Research Division of Beauty and Science, Ochanomizu University, 2-1-1 Ohtsuka, Bunkyo-ku, Tokyo, 112-8610, Japan
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4
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Qualitative and quantitative comparison of cyclic phosphatidic acid and its related lipid species in rat serum using hydrophilic interaction liquid chromatography with tandem-mass spectrometry. J Chromatogr A 2018; 1567:177-184. [DOI: 10.1016/j.chroma.2018.07.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 06/26/2018] [Accepted: 07/02/2018] [Indexed: 12/15/2022]
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5
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Shimizu Y, Ishikawa M, Gotoh M, Fukasawa K, Yamamoto S, Iwasa K, Yoshikawa K, Murakami-Murofushi K. Quantitative determination of cyclic phosphatidic acid and its carba analog in mouse organs and plasma using LC-MS/MS. J Chromatogr B Analyt Technol Biomed Life Sci 2018; 1076:15-21. [PMID: 29353671 DOI: 10.1016/j.jchromb.2018.01.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 12/12/2017] [Accepted: 01/02/2018] [Indexed: 11/29/2022]
Abstract
Cyclic phosphatidic acid (cPA), an analog of lysophosphatidic acid, is involved in the regulation of many cellular processes. A sensitive and specific method to quantify the molecular species of cPA is important for studying the physiological and pathophysiological roles of cPA. Here, we developed a liquid chromatography-tandem mass spectrometry (LC-MS/MS)-based quantification method for the simultaneous detection of cPA species having various fatty acids (16:0, 18:0, 18:1, and 18:2) as well as 2-carba-cPA, a chemically synthesized analog of cPA. Chromatography was performed using a reversed-phase C18 column. cPA species were detected using a triple quadrupole mass spectrometer. cPA 17:0 was used as an internal standard. Intra- and interday precision values (CV%) were within 10%. The linear range of detection for each cPA species was 0.01 μg/mL to 5 μg/mL, with correlation coefficients of 0.998 or higher. The developed method was applied to the quantification of cPA species in mouse plasma and organs. The concentrations of cPA 16:0, 18:0, and 18:1 were revealed to be significantly reduced in the brains of cuprizone-treated mice, a model of multiple sclerosis, compared with control mice. These findings could be important for understanding the roles of cPA in the neurodegenerative processes associated with multiple sclerosis.
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Affiliation(s)
- Yoshibumi Shimizu
- Endowed Research Division of Human Welfare Sciences, Ochanomizu University, Tokyo, Japan.
| | - Masaki Ishikawa
- Department of Pharmacology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
| | - Mari Gotoh
- Endowed Research Division of Human Welfare Sciences, Ochanomizu University, Tokyo, Japan; Institute for Human Life Innovation, Ochanomizu University, Tokyo, Japan
| | - Keiko Fukasawa
- Endowed Research Division of Human Welfare Sciences, Ochanomizu University, Tokyo, Japan
| | - Shinji Yamamoto
- Department of Pharmacology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
| | - Kensuke Iwasa
- Department of Pharmacology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
| | - Keisuke Yoshikawa
- Department of Pharmacology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
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6
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The effect of cyclic phosphatidic acid on the proliferation and differentiation of mouse cerebellar granule precursor cells during cerebellar development. Brain Res 2015; 1614:28-37. [DOI: 10.1016/j.brainres.2015.04.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Accepted: 04/09/2015] [Indexed: 11/18/2022]
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7
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Maeda-Sano K, Gotoh M, Morohoshi T, Someya T, Murofushi H, Murakami-Murofushi K. Cyclic phosphatidic acid and lysophosphatidic acid induce hyaluronic acid synthesis via CREB transcription factor regulation in human skin fibroblasts. Biochim Biophys Acta Mol Cell Biol Lipids 2014; 1841:1256-63. [DOI: 10.1016/j.bbalip.2014.05.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Revised: 05/07/2014] [Accepted: 05/12/2014] [Indexed: 02/02/2023]
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8
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Cyclic phosphatidic acid treatment suppress cuprizone-induced demyelination and motor dysfunction in mice. Eur J Pharmacol 2014; 741:17-24. [PMID: 25084219 DOI: 10.1016/j.ejphar.2014.07.040] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Revised: 07/18/2014] [Accepted: 07/21/2014] [Indexed: 11/21/2022]
Abstract
Multiple sclerosis is a chronic demyelinating disease of the central nervous system leading to progressive cognitive and motor dysfunction, which is characterized by neuroinflammation, demyelination, astrogliosis, loss of oligodendrocytes, and axonal pathologies. Cyclic phosphatidic acid (cPA) is a naturally occurring phospholipid mediator with a unique cyclic phosphate ring structure at the sn-2 and sn-3 positions of the glycerol backbone. cPA elicits a neurotrophin-like action and protects hippocampal neurons from ischemia-induced delayed neuronal death. In this study, we investigated the effects of cPA on cuprizone-induced demyelination, which is a model of multiple sclerosis. Mice were fed a diet containing 0.2% cuprizone for 5 weeks, which induces severe demyelination, astrocyte and microglial activation, and motor dysfunction. Simultaneous administration of cPA effectively attenuated cuprizone-induced demyelination, glial activation, and motor dysfunction. These data indicate that cPA may be a useful treatment to reduce the extent of demyelination and the severity of motor dysfunction in multiple sclerosis. cPA is a potential lead compound in the development of drugs for the treatment of this devastating disease.
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Phospholipase D toxins of brown spider venom convert lysophosphatidylcholine and sphingomyelin to cyclic phosphates. PLoS One 2013; 8:e72372. [PMID: 24009677 PMCID: PMC3756997 DOI: 10.1371/journal.pone.0072372] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Accepted: 07/15/2013] [Indexed: 11/19/2022] Open
Abstract
Venoms of brown spiders in the genus Loxosceles contain phospholipase D enzyme toxins that can cause severe dermonecrosis and even death in humans. These toxins cleave the substrates sphingomyelin and lysophosphatidylcholine in mammalian tissues, releasing the choline head group. The other products of substrate cleavage have previously been reported to be monoester phospholipids, which would result from substrate hydrolysis. Using (31)P NMR and mass spectrometry we demonstrate that recombinant toxins, as well as whole venoms from diverse Loxosceles species, exclusively catalyze transphosphatidylation rather than hydrolysis, forming cyclic phosphate products from both major substrates. Cyclic phosphates have vastly different biological properties from their monoester counterparts, and they may be relevant to the pathology of brown spider envenomation.
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Abstract
Lysophosphatidic acid (LPA) is a potent bioactive phospholipid. As many other biological active lipids, LPA is an autacoid: it is formed locally on demand, and it acts locally near its site of synthesis. LPA has a plethora of biological activities on blood cells (platelets, monocytes) and cells of the vessel wall (endothelial cells, smooth muscle cells, macrophages) that are all key players in atherosclerotic and atherothrombotic processes. The specific cellular actions of LPA are determined by its multifaceted molecular structures, the expression of multiple G-protein coupled LPA receptors at the cell surface and their diverse coupling to intracellular signalling pathways. Numerous studies have now shown that LPA has thrombogenic and atherogenic actions. Here, we aim to provide a comprehensive, yet concise, thoughtful and critical review of this exciting research area and to pinpoint potential pharmacological targets for inhibiting thrombogenic and atherogenic activities of LPA. We hope that the review will serve to accelerate knowledge of basic and clinical science, and to foster drug development in the field of LPA and atherosclerotic/atherothrombotic diseases.
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Affiliation(s)
- Andreas Schober
- Institute for Molecular Cardiovascular Research, RWTH Aachen University, Aachen, Germany
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11
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Gotoh M, Sano-Maeda K, Murofushi H, Murakami-Murofushi K. Protection of neuroblastoma Neuro2A cells from hypoxia-induced apoptosis by cyclic phosphatidic acid (cPA). PLoS One 2012; 7:e51093. [PMID: 23251428 PMCID: PMC3521017 DOI: 10.1371/journal.pone.0051093] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Accepted: 10/29/2012] [Indexed: 12/02/2022] Open
Abstract
Cyclic phosphatidic acid (cPA) is a naturally occurring phospholipid mediator with a unique cyclic phosphate ring at the sn-2 and sn-3 positions of its glycerol backbone. We have previously shown that cPA significantly suppresses ischemia-induced delayed neuronal death and the accumulation of glial fibrillary acidic protein in the CA1 region of the rat hippocampus. These results indicated that the systemic administration of cPA can protect hippocampal neurons against ischemia-induced delayed neuronal cell death. In the current study, we investigated the effects of cPA on neuronal cell death caused by hypoxia in vitro and the molecular mechanisms underlying these effects. We used cobalt chloride (CoCl2) to expose cells to hypoxic conditions in vitro. Treating mouse neuroblastoma (Neuro2A) cells with CoCl2 induced nuclear DNA condensation and phosphatidylserine exposure. However, adding cPA led to the suppression of CoCl2-induced apoptosis in a cPA dose-dependent manner and attenuated the increase in the Bax/Bcl-2 ratio caused by CoCl2. Quantitative PCR analysis showed that Neuro2A cells strongly express the LPA1, LPA2, and LPA6, which are G-protein coupled receptors that can be activated by cPA. To date, LPA1 and LPA2 have been reported to exhibit antiapoptotic activity. Therefore, to assess the roles of LPA1 and LPA2 on cPA-induced neuroprotective functions, Ki16425, a selective LPA1 and LPA3 antagonist, was adopted to know the LPA1 function and siRNA was used to knockdown the expression of LPA2. On the basis of our results, we propose that cPA-induced protection of Neuro2A cells from CoCl2-induced hypoxia damage is mediated via LPA2.
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Subauste AR, Das AK, Li X, Elliot B, Evans C, El Azzouny M, Treutelaar M, Oral E, Leff T, Burant CF. Alterations in lipid signaling underlie lipodystrophy secondary to AGPAT2 mutations. Diabetes 2012; 61:2922-31. [PMID: 22872237 PMCID: PMC3478532 DOI: 10.2337/db12-0004] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Congenital generalized lipodystrophy (CGL), secondary to AGPAT2 mutation is characterized by the absence of adipocytes and development of severe insulin resistance. In the current study, we investigated the adipogenic defect associated with AGPAT2 mutations. Adipogenesis was studied in muscle-derived multipotent cells (MDMCs) isolated from vastus lateralis biopsies obtained from controls and subjects harboring AGPAT2 mutations and in 3T3-L1 preadipocytes after knockdown or overexpression of AGPAT2. We demonstrate an adipogenic defect using MDMCs from control and CGL human subjects with mutated AGPAT2. This defect was rescued in CGL MDMCs with a retrovirus expressing AGPAT2. Both CGL-derived MDMCs and 3T3-L1 cells with knockdown of AGPAT2 demonstrated an increase in cell death after induction of adipogenesis. Lack of AGPAT2 activity reduces Akt activation, and overexpression of constitutively active Akt can partially restore lipogenesis. AGPAT2 modulated the levels of phosphatidic acid, lysophosphatidic acid, phosphatidylinositol species, as well as the peroxisome proliferator-activated receptor γ (PPARγ) inhibitor cyclic phosphatidic acid. The PPARγ agonist pioglitazone partially rescued the adipogenic defect in CGL cells. We conclude that AGPAT2 regulates adipogenesis through the modulation of the lipome, altering normal activation of phosphatidylinositol 3-kinase (PI3K)/Akt and PPARγ pathways in the early stages of adipogenesis.
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Affiliation(s)
- Angela R. Subauste
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
| | - Arun K. Das
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
| | - Xiangquan Li
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
| | - Brandon Elliot
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
| | - Charles Evans
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
| | | | - Mary Treutelaar
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
| | - Elif Oral
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
| | - Todd Leff
- Department of Pathology, Wayne State University, Detroit, Michigan
| | - Charles F. Burant
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, Michigan
- Corresponding author: Charles F. Burant,
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Harmon GS, Lam MT, Glass CK. PPARs and lipid ligands in inflammation and metabolism. Chem Rev 2012; 111:6321-40. [PMID: 21988241 DOI: 10.1021/cr2001355] [Citation(s) in RCA: 113] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Gregory S Harmon
- Department of Medicine, Division of Digestive Diseases, University of California-Los Angeles, Los Angeles, California 90095, USA
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Abstract
A recent study in Molecular Cell (Tsukahara et al., 2010) identifies cyclic phosphatidic acid (CPA) as a naturally occurring PPARgamma antagonist that can be generated from lysophospholipids by signal-dependent activation of phospholipase D2. This endogenous CPA regulates PPARgamma functions required for adipogenesis, glucose homeostasis, and vascular wall biology.
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Affiliation(s)
- Yumiko Oishi-Tanaka
- Department of Cellular and Molecular Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0651, USA
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15
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Rytczak P, Koziołkiewicz M, Okruszek A. The chemical synthesis of phosphorothioate and phosphorodithioate analogues of lysophosphatidic acid (LPA) and cyclic phosphatidic acid (CPA). NEW J CHEM 2010. [DOI: 10.1039/b9nj00704k] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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16
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Zhao Y, Natarajan V. Lysophosphatidic acid signaling in airway epithelium: role in airway inflammation and remodeling. Cell Signal 2009; 21:367-77. [PMID: 18996473 PMCID: PMC2660380 DOI: 10.1016/j.cellsig.2008.10.010] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2008] [Revised: 09/27/2008] [Accepted: 10/21/2008] [Indexed: 02/07/2023]
Abstract
Lysophosphatidic acid (LPA), a potent bioactive phospholipid, induces diverse cellular responses, including cell proliferation, migration, and cytokine release. LPA can be generated intracellularly and extracellularly through multiple synthetic pathways by action of various enzymes, such as phospholipase A(1/2) (PLA(1/2)), phospholipase D (PLD), acylglycerol kinase (AGK), and lysophospholipase D (lysoPLD). Metabolism of LPA is regulated by a family of lipid phosphate phosphatases (LPPs). Significant amounts of LPA have been detected in various biological fluids, including serum, saliva, and bronchoalveolar lavage fluid (BALF). The most significant effects of LPA appear to be through activation of the G-protein-coupled receptors (GPCRs), termed LPA(1-6). LPA regulates gene expression through activation of several transcriptional factors, such as nuclear factor-kappaB (NF-kappaB), AP-1, and C/EBPbeta. In addition to GPCRs, cross-talk between LPA receptors and receptor tyrosine kinases (RTKs) partly regulates LPA-induced intracellular signaling and cellular responses. Airway epithelial cells participate in innate immunity through the release of cytokines, chemokines, lipid mediators, other inflammatory mediators and an increase in barrier function in response to a variety of inhaled stimuli. Expression of LPA receptors has been demonstrated in airway epithelial cells. This review summarizes our recent observations of the role of LPA/LPA-Rs in regulation of airway epithelium, especially in relation to the secretion of pro- and anti-inflammatory mediators and regulation of airway barrier function.
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Affiliation(s)
- Yutong Zhao
- Department of Medicine, University of Chicago, Chicago, IL 60637, USA.
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17
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Fujiwara Y. Cyclic phosphatidic acid - a unique bioactive phospholipid. BIOCHIMICA ET BIOPHYSICA ACTA 2008; 1781:519-24. [PMID: 18554524 PMCID: PMC2572151 DOI: 10.1016/j.bbalip.2008.05.002] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2008] [Revised: 05/06/2008] [Accepted: 05/12/2008] [Indexed: 02/05/2023]
Abstract
Cyclic phosphatidic acid (CPA) is a naturally occurring analog of the growth factor-like phospholipid mediator, lysophosphatidic acid (LPA). The sn-2 hydroxy group of CPA forms a 5-membered ring with the sn-3 phosphate. CPA affects numerous cellular functions, including anti-mitogenic regulation of the cell cycle, induction of stress fiber formation, inhibition of tumor cell invasion and metastasis, and regulation of differentiation and survival of neuronal cells. Interestingly, many of these cellular responses caused by CPA oppose those of LPA despite the activation of apparently overlapping receptor populations. Since the early 1990s, studies on CPA actions gradually developed, and we are now beginning to understand the importance of this lipid. In this review, we focus on the current knowledge about CPA, including enzymatic formation of CPA, unique biological activities and biological targets of CPA, and we also explore metabolically stabilized CPA analogs.
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Affiliation(s)
- Yuko Fujiwara
- Department of Physiology, The University of Tennessee Health Sciences Center, 894 Union Avenue, Memphis, TN 38163, USA.
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