1
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Carpanedo L, Rund KM, Wende LM, Kampschulte N, Schebb NH. LC-HRMS analysis of phospholipids bearing oxylipins. Anal Chim Acta 2024; 1326:343139. [PMID: 39260917 DOI: 10.1016/j.aca.2024.343139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2024] [Revised: 08/19/2024] [Accepted: 08/20/2024] [Indexed: 09/13/2024]
Abstract
BACKGROUND Several oxylipins including hydroxy- and epoxy-polyunsaturated fatty acids act as lipid mediators. In biological samples they can be present as non-esterified form, but the major part occurs esterified in phospholipids (PL) or other lipids. Esterified oxylipins are quantified indirectly after alkaline hydrolysis as non-esterified oxylipins. However, in this indirect analysis the information in which lipid class oxylipins are bound is lost. In this work, an untargeted liquid chromatography high-resolution mass spectrometry (LC-HRMS) method for the direct analysis of PL bearing oxylipins was developed. RESULTS Optimized reversed-phase LC separation achieved a sufficient separation of isobaric and isomeric PL from different lipid classes bearing oxylipin positional isomers. Individual PL species bearing oxylipins were identified based on retention time, precursor ion and characteristic product ions. The bound oxylipin could be characterized based on product ions resulting from the α-cleavage occurring at the hydroxy/epoxy group. PL sn-1/sn-2 isomers were identified based on the neutral loss of the fatty acyl in the sn-2 position. A total of 422 individual oxPL species from 7 different lipid classes i.e., PI, PS, PC, PE, PC-P, PC-O, and PE-P were detected in human serum and cells. This method enabled to determine in which PL class supplemented oxylipins are incorporated in HEK293 cells: 20:4;15OH, 20:4;14Ep, and 20:5;14Ep were mostly bound to PI. 20:4;8Ep and 20:5;8Ep were esterified to PC and PE while other oxylipins were mainly found in PC. SIGNIFICANCE The developed LC-HRMS method enables the comprehensive detection as well as the semi-quantification of isobaric and isomeric PL species bearing oxylipins. With this method, we show that the position of the oxidation has a great impact and directs the incorporation of oxylipins into the different PL classes in human cells.
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Affiliation(s)
- Laura Carpanedo
- Faculty of Mathematics and Natural Sciences, University of Wuppertal, Wuppertal, Germany
| | - Katharina M Rund
- Faculty of Mathematics and Natural Sciences, University of Wuppertal, Wuppertal, Germany
| | - Luca M Wende
- Faculty of Mathematics and Natural Sciences, University of Wuppertal, Wuppertal, Germany
| | - Nadja Kampschulte
- Faculty of Mathematics and Natural Sciences, University of Wuppertal, Wuppertal, Germany
| | - Nils Helge Schebb
- Faculty of Mathematics and Natural Sciences, University of Wuppertal, Wuppertal, Germany.
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2
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Suzuki T, Taketomi Y, Yanagida K, Yoshida-Hashidate T, Nagase T, Murakami M, Shimizu T, Shindou H. Re-evaluation of the canonical PAF pathway in cutaneous anaphylaxis. Biochim Biophys Acta Mol Cell Biol Lipids 2024; 1870:159563. [PMID: 39332666 DOI: 10.1016/j.bbalip.2024.159563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2024] [Revised: 08/27/2024] [Accepted: 09/23/2024] [Indexed: 09/29/2024]
Abstract
Platelet-activating factor (PAF) is a potent classical lipid mediator that plays a critical role in various diseases such as allergy and nervous system disorders. In the realm of allergy, previous studies suggested that PAF is generated in response to extracellular stimuli and contributes to allergic reactions via PAF receptor (PAFR). However, the sources of endogenous PAF and its pathophysiological dynamics remain largely elusive in vivo. Here, we report that rapid and local PAF generation completely depends on lysophospholipid acyltransferase 9 (LPLAT9, also known as LPCAT2) expressed in mast cells in IgE-mediated passive cutaneous anaphylaxis. However, we found that LPLAT9 knockout (KO) mice did not display attenuated vascular leakage. Additionally, decreased vascular leakage was observed in PAFR KO mice, but not in endothelial cell-specific mice in this model. These divergences highlight a yet unsolved complexity of the biological functions of PAF and PAFR in a pathophysiological process.
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Affiliation(s)
- Tomoyuki Suzuki
- Department of Lipid Life Science, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, Japan
| | - Yoshitaka Taketomi
- Laboratory of Microenvironmental and Metabolic Health Science, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Keisuke Yanagida
- Department of Lipid Life Science, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, Japan
| | - Tomomi Yoshida-Hashidate
- Department of Lipid Life Science, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, Japan
| | | | - Makoto Murakami
- Laboratory of Microenvironmental and Metabolic Health Science, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Takao Shimizu
- Department of Lipid Life Science, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, Japan; Institute of Microbial Chemistry, Tokyo, Japan
| | - Hideo Shindou
- Department of Lipid Life Science, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, Japan; Department of Medical Lipid Science, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
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3
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Yadav P, Beura SK, Panigrahi AR, Kulkarni PP, Yadav MK, Munshi A, Singh SK. Lysophosphatidylcholine induces oxidative stress and calcium-mediated cell death in human blood platelets. Cell Biol Int 2024; 48:1266-1284. [PMID: 38837523 DOI: 10.1002/cbin.12192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 05/06/2024] [Accepted: 05/11/2024] [Indexed: 06/07/2024]
Abstract
Platelets are essential component of circulation that plays a major role in hemostasis and thrombosis. During activation and its demise, platelets release platelet-derived microvesicles, with lysophosphatidylcholine (LPC) being a prominent component in their lipid composition. LPC, an oxidized low-density lipoprotein, is involved in cellular metabolism, but its higher level is implicated in pathologies like atherosclerosis, diabetes, and inflammatory disorders. Despite this, its impact on platelet function remains relatively unexplored. To address this, we studied LPC's effects on washed human platelets. A multimode plate reader was employed to measure reactive oxygen species and intracellular calcium using H2DCF-DA and Fluo-4-AM, respectively. Flow cytometry was utilized to measure phosphatidylserine expression, mitochondrial membrane potential (ΔΨm), and mitochondrial permeability transition pore (mPTP) formation using FITC-Annexin V, JC-1, and CoCl2/calcein-AM, respectively. Additionally, platelet morphology and its ultrastructure were observed via phase contrast and electron microscopy. Sonoclot and light transmission aggregometry were employed to examine fibrin formation and platelet aggregation, respectively. The findings demonstrate that LPC induced oxidative stress and increased intracellular calcium in platelets, resulting in increased phosphatidylserine expression and reduced ΔΨm. LPC triggered caspase-independent platelet death and mPTP opening via cytosolic and mitochondrial calcium, along with microvesiculation and reduced platelet counts. LPC increased the platelet's size, adopting a balloon-shaped morphology, causing membrane fragmentation and releasing its cellular contents, while inducing a pro-coagulant phenotype with increased fibrin formation and reduced integrin αIIbβ3 activation. Conclusively, this study reveals LPC-induced oxidative stress and calcium-mediated platelet death, necrotic in nature with pro-coagulant properties, potentially impacting inflammation and repair mechanisms during vascular injury.
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Affiliation(s)
- Pooja Yadav
- Department of Zoology, School of Basic Sciences, Central University of Punjab, Ghudda, Bathinda, India
| | - Samir K Beura
- Department of Zoology, School of Basic Sciences, Central University of Punjab, Ghudda, Bathinda, India
| | - Abhishek R Panigrahi
- Department of Zoology, School of Basic Sciences, Central University of Punjab, Ghudda, Bathinda, India
| | - Paresh P Kulkarni
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Mithlesh K Yadav
- Department of Zoology, School of Basic Sciences, Central University of Punjab, Ghudda, Bathinda, India
| | - Anjana Munshi
- Department of Human Genetics and Molecular Medicine, Central University of Punjab, Ghudda, Bathinda, India
| | - Sunil K Singh
- Department of Zoology, School of Basic Sciences, Central University of Punjab, Ghudda, Bathinda, India
- Department of Biochemistry, School of Basic Sciences, Central University of Punjab, Ghudda, Bathinda, India
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4
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Dahal A, Hong Y, Mathew JS, Geber A, Eckl S, Renner S, Sailer CJ, Ryan AT, Mir S, Lim K, Linehan DC, Gerber SA, Kim M. Platelet-activating factor (PAF) promotes immunosuppressive neutrophil differentiation within tumors. Proc Natl Acad Sci U S A 2024; 121:e2406748121. [PMID: 39178229 PMCID: PMC11363292 DOI: 10.1073/pnas.2406748121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Accepted: 07/08/2024] [Indexed: 08/25/2024] Open
Abstract
Chronic inflammatory milieu in the tumor microenvironment (TME) leads to the recruitment and differentiation of myeloid-derived suppressor cells (MDSCs). Polymorphonuclear (PMN)-MDSCs, which are phenotypically and morphologically defined as a subset of neutrophils, cause major immune suppression in the TME, posing a significant challenge in the development of effective immunotherapies. Despite recent advances in our understanding of PMN-MDSC functions, the mechanism that gives rise to immunosuppressive neutrophils within the TME remains elusive. Both in vivo and in vitro, newly recruited neutrophils into the tumor sites remained activated and highly motile for several days and developed immunosuppressive phenotypes, as indicated by increased arginase 1 (Arg1) and dcTrail-R1 expression and suppressed anticancer CD8 T cell cytotoxicity. The strong suppressive function was successfully recapitulated by incubating naive neutrophils with cancer cell culture supernatant in vitro. Cancer metabolite secretome analyses of the culture supernatant revealed that both murine and human cancers released lipid mediators to induce the differentiation of immunosuppressive neutrophils. Liquid chromatography-mass spectrometry (LC-MS) lipidomic analysis identified platelet-activation factor (PAF; 1-O-alkyl-2-acetyl-sn-glycero-3-phosphocholine) as a common tumor-derived lipid mediator that induces neutrophil differentiation. Lysophosphatidylcholine acyltransferase 2 (LPCAT2), the PAF biosynthetic enzyme, is up-regulated in human pancreatic ductal adenocarcinoma (PDAC) and shows an unfavorable correlation with patient survival across multiple cancer types. Our study identifies PAF as a lipid-driven mechanism of MDSC differentiation in the TME, providing a potential target for cancer immunotherapy.
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Affiliation(s)
- Ankit Dahal
- Department of Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, University of Rochester, Rochester, NY
| | - Yeonsun Hong
- Department of Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, University of Rochester, Rochester, NY
| | - Jocelyn S. Mathew
- Department of Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, University of Rochester, Rochester, NY
| | - Adam Geber
- Department of Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, University of Rochester, Rochester, NY
| | - Sarah Eckl
- Department of Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, University of Rochester, Rochester, NY
| | - Stephanie Renner
- Department of Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, University of Rochester, Rochester, NY
| | - Cooper J. Sailer
- Department of Pathology, University of Rochester Medical Center, Rochester, NY
| | - Allison T. Ryan
- Department of Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, University of Rochester, Rochester, NY
| | - Sana Mir
- Department of Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, University of Rochester, Rochester, NY
| | - Kihong Lim
- Department of Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, University of Rochester, Rochester, NY
| | - David C. Linehan
- Department of Surgery, University of Rochester Medical Center, Rochester, NY
- Wilmot Cancer Institute, University of Rochester Medical Center, Rochester, NY
| | - Scott A. Gerber
- Department of Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, University of Rochester, Rochester, NY
- Department of Surgery, University of Rochester Medical Center, Rochester, NY
- Wilmot Cancer Institute, University of Rochester Medical Center, Rochester, NY
| | - Minsoo Kim
- Department of Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, University of Rochester, Rochester, NY
- Department of Surgery, University of Rochester Medical Center, Rochester, NY
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5
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Tabe S, Hikiji H, Hashidate-Yoshida T, Shindou H, Shimizu T, Tominaga K. The role of lysophosphatidylcholine acyltransferase 2 in osteoblastic differentiation of C2C12 cells. FEBS Open Bio 2024. [PMID: 39075841 DOI: 10.1002/2211-5463.13845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 05/12/2024] [Accepted: 05/29/2024] [Indexed: 07/31/2024] Open
Abstract
Glycerophospholipids, a primary component of cellular membranes, play important structural and functional roles in cells. In the remodelling pathway (Lands' cycle), the concerted actions of phospholipase As and lysophospholipid acyltransferases (LPLATs) contribute to the incorporation of diverse fatty acids in glycerophospholipids in an asymmetric manner, which differ between cell types. In this study, the role of LPLATs in osteoblastic differentiation of C2C12 cells was investigated. Gene and protein expression levels of lysophosphatidylcholine acyltransferase 2 (LPCAT2), one of the LPLATs, increased during osteoblastic differentiation in C2C12 cells. LPCAT2 knockdown in C2C12 cells downregulated the expression of osteoblastic differentiation markers and the number and size of lipid droplets (LDs) and suppressed the phosphorylation of Smad1/5/9. In addition, LPCAT2 knockdown inhibited Snail1 and the downstream target of Runx2 and vitamin D receptor (VDR). These results suggest that LPCAT2 modulates osteoblastic differentiation in C2C12 cells through the bone morphogenetic protein (BMP)/Smad signalling pathway.
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Affiliation(s)
- Shirou Tabe
- Division of Oral and Maxillofacial Surgery, Department of Science of Physical Functions, Kyushu Dental University, Kitakyushu-shi, Japan
| | - Hisako Hikiji
- School of Oral Health Sciences, Kyushu Dental University, Kitakyushu-shi, Japan
| | - Tomomi Hashidate-Yoshida
- Department of Lipid Life Science, Research Institute, National Center for Global Health and Medicine, Shinjuku-ku, Japan
| | - Hideo Shindou
- Department of Lipid Life Science, Research Institute, National Center for Global Health and Medicine, Shinjuku-ku, Japan
- Agency for Medical Research and Development-Core Research for Evolutional Medical Science and Technology (AMED-CREST), AMED, Chiyoda-ku, Japan
| | - Takao Shimizu
- Department of Lipid Life Science, Research Institute, National Center for Global Health and Medicine, Shinjuku-ku, Japan
- Department of Lipidomics, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Japan
| | - Kazuhiro Tominaga
- Division of Oral and Maxillofacial Surgery, Department of Science of Physical Functions, Kyushu Dental University, Kitakyushu-shi, Japan
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6
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Fan W, Xu Y, He X, Luo P, Zhu J, Li J, Wang R, Yuan Q, Wu K, Hu W, Zhao Y, Xu S, Cheng X, Wang Y, Xu HE, Zhuang Y. Molecular basis for the activation of PAF receptor by PAF. Cell Rep 2024; 43:114422. [PMID: 38943642 DOI: 10.1016/j.celrep.2024.114422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 05/07/2024] [Accepted: 06/14/2024] [Indexed: 07/01/2024] Open
Abstract
Platelet-activating factor (PAF) is a potent phospholipid mediator crucial in multiple inflammatory and immune responses through binding and activating the PAF receptor (PAFR). However, drug development targeting the PAFR has been limited, partly due to an incomplete understanding of its activation mechanism. Here, we present a 2.9-Å structure of the PAF-bound PAFR-Gi complex. Structural and mutagenesis analyses unveil a specific binding mode of PAF, with the choline head forming cation-π interactions within PAFR hydrophobic pocket, while the alkyl tail penetrates deeply into an aromatic cleft between TM4 and TM5. Binding of PAF modulates conformational changes in key motifs of PAFR, triggering the outward movement of TM6, TM7, and helix 8 for G protein coupling. Molecular dynamics simulation suggests a membrane-side pathway for PAF entry into PAFR via the TM4-TM5 cavity. By providing molecular insights into PAFR signaling, this work contributes a foundation for developing therapeutic interventions targeting PAF signal axis.
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Affiliation(s)
- Wenjia Fan
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing 210046, China; The State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Youwei Xu
- The State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Xinheng He
- The State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ping Luo
- The State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Jingpeng Zhu
- The State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Junrui Li
- The State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Ruolan Wang
- The State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qingning Yuan
- The State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; The Shanghai Advanced Electron Microscope Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Kai Wu
- The State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; The Shanghai Advanced Electron Microscope Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Wen Hu
- The State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; The Shanghai Advanced Electron Microscope Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Yuxi Zhao
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing 210046, China; The State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Shiqi Xu
- The State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Xi Cheng
- The State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yue Wang
- The State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.
| | - H Eric Xu
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing 210046, China; The State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Youwen Zhuang
- The State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; Medicinal Bioinformatics Center, School of Medicine, Shanghai Jiao Tong University, Shanghai 200025, China.
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7
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Tachibana T, One C, Khan S, Cline MA. Effect of platelet-activating factor on food intake, cloacal temperature, voluntary activity and crop emptying rate in chicks. Prostaglandins Other Lipid Mediat 2024; 172:106818. [PMID: 38340978 DOI: 10.1016/j.prostaglandins.2024.106818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 02/03/2024] [Accepted: 02/06/2024] [Indexed: 02/12/2024]
Abstract
Platelet-activating factor (PAF) plays a significant role in several leucocyte functions, including platelet aggregation and inflammation. Additionally, PAF has a role in the behavioral and physiological changes in mammals. However, the effect of PAF has not been well studied in birds. Therefore, the study aimed to determine if PAF affects feeding behavior, voluntary activity, cloacal temperature, and feed passage through the digestive tract in chicks (Gallus gallus). We also studied the involvement of PAF in the innate immune system induced by lipopolysaccharide (LPS), a cell wall component of gram-negative bacteria. Both intraperitoneal (IP) and intracerebroventricular (ICV) injections of PAF significantly decreased food intake. IP injection of PAF significantly decreased voluntary activity and slowed the feed passage from the crop, whereas ICV injection had no effect. Conversely, ICV injection of PAF significantly increased the cloacal temperature, but IP injection had no effect. The IP injection of LPS significantly reduced the mRNA expression of lysophosphatidylcholine acyltransferase 2, an enzyme responsible for PAF production in the heart and pancreas. On the other hand, LPS significantly increased the mRNA expression of the PAF receptor in the peripheral organs. The present study shows that PAF influences behavioral and physiological responses and is related to the response against bacterial infections in chicks.
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Affiliation(s)
- Tetsuya Tachibana
- Department of Agrobiological Science, Faculty of Agriculture, Ehime University, Matsuyama 790-8566, Japan.
| | - Chisato One
- Department of Agrobiological Science, Faculty of Agriculture, Ehime University, Matsuyama 790-8566, Japan
| | - Sakirul Khan
- Research Center for Global and Local Infectious Diseases, Oita University, Yufu, Oita 879-5593, Japan; Department of Microbiology, Faculty of Medicine, Oita University, Yufu, Oita 879-5593, Japan
| | - Mark A Cline
- School of Neuroscience, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, United States
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8
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Murano H, Inoue S, Hashidate-Yoshida T, Shindou H, Shimizu T, Otaki Y, Minegishi Y, Kitaoka T, Futakuchi M, Igarashi A, Nishiwaki M, Nemoto T, Sato M, Kobayashi M, Sato K, Hanawa T, Miyazaki O, Watanabe M. Lysophospholipid Acyltransferase 9 Promotes Emphysema Formation via Platelet-activating Factor. Am J Respir Cell Mol Biol 2024; 70:482-492. [PMID: 38377392 DOI: 10.1165/rcmb.2023-0253oc] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 02/20/2024] [Indexed: 02/22/2024] Open
Abstract
Cigarette smoking is known to be the leading cause of chronic obstructive pulmonary disease (COPD). However, the detailed mechanisms have not been elucidated. PAF (platelet-activating factor), a potent inflammatory mediator, is involved in the pathogenesis of various respiratory diseases such as bronchial asthma and COPD. We focused on LPLAT9 (lysophospholipid acyltransferase 9), a biosynthetic enzyme of PAF, in the pathogenesis of COPD. LPLAT9 gene expression was observed in excised COPD lungs and single-cell RNA sequencing data of alveolar macrophages (AMs). LPLAT9 was predominant and upregulated in AMs, particularly monocyte-derived AMs, in patients with COPD. To identify the function of LPLAT9/PAF in AMs in the pathogenesis of COPD, we exposed systemic LPLAT9-knockout (LPALT9-/-) mice to cigarette smoke (CS). CS increased the number of AMs, especially the monocyte-derived fraction, which secreted MMP12 (matrix metalloprotease 12). Also, CS augmented LPLAT9 phosphorylation/activation on macrophages and, subsequently, PAF synthesis in the lung. The LPLAT9-/- mouse lung showed reduced PAF production after CS exposure. Intratracheal PAF administration accumulated AMs by increasing MCP1 (monocyte chemoattractant protein-1). After CS exposure, AM accumulation and subsequent pulmonary emphysema, a primary pathologic change of COPD, were reduced in LPALT9-/- mice compared with LPLAT9+/+ mice. Notably, these phenotypes were again worsened by LPLAT9+/+ bone marrow transplantation in LPALT9-/- mice. Thus, CS-induced LPLAT9 activation in monocyte-derived AMs aggravated pulmonary emphysema via PAF-induced further accumulation of AMs. These results suggest that PAF synthesized by LPLAT9 has an important role in the pathogenesis of COPD.
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Affiliation(s)
- Hiroaki Murano
- Department of Cardiology, Pulmonology, and Nephrology and
- Department of Lipid Life Science and
| | - Sumito Inoue
- Department of Cardiology, Pulmonology, and Nephrology and
| | | | - Hideo Shindou
- Department of Lipid Life Science and
- Department of Medical Lipid Science, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; and
| | - Takao Shimizu
- Department of Lipid Signaling Project, National Center for Global Health and Medicine, Tokyo, Japan
- Institute of Microbial Chemistry, Tokyo, Japan
| | - Yoichiro Otaki
- Department of Cardiology, Pulmonology, and Nephrology and
| | | | - Takumi Kitaoka
- Department of Pathology, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Mitsuru Futakuchi
- Department of Pathology, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Akira Igarashi
- Department of Cardiology, Pulmonology, and Nephrology and
| | | | - Takako Nemoto
- Department of Cardiology, Pulmonology, and Nephrology and
| | - Masamichi Sato
- Department of Cardiology, Pulmonology, and Nephrology and
| | - Maki Kobayashi
- Department of Cardiology, Pulmonology, and Nephrology and
| | - Kento Sato
- Department of Cardiology, Pulmonology, and Nephrology and
| | | | - Osamu Miyazaki
- Department of Cardiology, Pulmonology, and Nephrology and
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9
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Korbecki J, Bosiacki M, Pilarczyk M, Gąssowska-Dobrowolska M, Jarmużek P, Szućko-Kociuba I, Kulik-Sajewicz J, Chlubek D, Baranowska-Bosiacka I. Phospholipid Acyltransferases: Characterization and Involvement of the Enzymes in Metabolic and Cancer Diseases. Cancers (Basel) 2024; 16:2115. [PMID: 38893234 PMCID: PMC11171337 DOI: 10.3390/cancers16112115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 05/23/2024] [Accepted: 05/28/2024] [Indexed: 06/21/2024] Open
Abstract
This review delves into the enzymatic processes governing the initial stages of glycerophospholipid (phosphatidylcholine, phosphatidylethanolamine, and phosphatidylserine) and triacylglycerol synthesis. The key enzymes under scrutiny include GPAT and AGPAT. Additionally, as most AGPATs exhibit LPLAT activity, enzymes participating in the Lands cycle with similar functions are also covered. The review begins by discussing the properties of these enzymes, emphasizing their specificity in enzymatic reactions, notably the incorporation of polyunsaturated fatty acids (PUFAs) such as arachidonic acid and docosahexaenoic acid (DHA) into phospholipids. The paper sheds light on the intricate involvement of these enzymes in various diseases, including obesity, insulin resistance, and cancer. To underscore the relevance of these enzymes in cancer processes, a bioinformatics analysis was conducted. The expression levels of the described enzymes were correlated with the overall survival of patients across 33 different types of cancer using the GEPIA portal. This review further explores the potential therapeutic implications of inhibiting these enzymes in the treatment of metabolic diseases and cancer. By elucidating the intricate enzymatic pathways involved in lipid synthesis and their impact on various pathological conditions, this paper contributes to a comprehensive understanding of these processes and their potential as therapeutic targets.
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Affiliation(s)
- Jan Korbecki
- Department of Anatomy and Histology, Collegium Medicum, University of Zielona Góra, Zyty 28, 65-046 Zielona Góra, Poland;
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University in Szczecin, Powstańców Wlkp. 72, 70-111 Szczecin, Poland; (M.B.); (D.C.)
| | - Mateusz Bosiacki
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University in Szczecin, Powstańców Wlkp. 72, 70-111 Szczecin, Poland; (M.B.); (D.C.)
| | - Maciej Pilarczyk
- Department of Nervous System Diseases, Neurosurgery Center University Hospital in Zielona Góra, Collegium Medicum, University of Zielona Gora, 65-417 Zielona Góra, Poland; (M.P.); (P.J.)
| | - Magdalena Gąssowska-Dobrowolska
- Department of Cellular Signalling, Mossakowski Medical Research Institute, Polish Academy of Sciences, Pawińskiego 5, 02-106 Warsaw, Poland;
| | - Paweł Jarmużek
- Department of Nervous System Diseases, Neurosurgery Center University Hospital in Zielona Góra, Collegium Medicum, University of Zielona Gora, 65-417 Zielona Góra, Poland; (M.P.); (P.J.)
| | | | - Justyna Kulik-Sajewicz
- Department of Conservative Dentistry and Endodontics, Pomeranian Medical University in Szczecin, Powstańców Wlkp. 72, 70-111 Szczecin, Poland;
| | - Dariusz Chlubek
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University in Szczecin, Powstańców Wlkp. 72, 70-111 Szczecin, Poland; (M.B.); (D.C.)
| | - Irena Baranowska-Bosiacka
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University in Szczecin, Powstańców Wlkp. 72, 70-111 Szczecin, Poland; (M.B.); (D.C.)
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10
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Osawa Y, Kawai H, Nakashima K, Nakaseko Y, Suto D, Yanagida K, Hashidate-Yoshida T, Mori T, Yoshio S, Ohtake T, Shindou H, Kanto T. Sphingosine-1-phosphate promotes liver fibrosis in metabolic dysfunction-associated steatohepatitis. PLoS One 2024; 19:e0303296. [PMID: 38753743 PMCID: PMC11098361 DOI: 10.1371/journal.pone.0303296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 04/22/2024] [Indexed: 05/18/2024] Open
Abstract
AIM Metabolic dysfunction-associated steatohepatitis (MASH) is one of the most prevalent liver diseases and is characterized by steatosis and the accumulation of bioactive lipids. This study aims to understand the specific lipid species responsible for the progression of liver fibrosis in MASH. METHODS Changes in bioactive lipid levels were examined in the livers of MASH mice fed a choline-deficient diet (CDD). Additionally, sphingosine kinase (SphK)1 mRNA, which generates sphingosine 1 phosphate (S1P), was examined in the livers of patients with MASH. RESULTS CDD induced MASH and liver fibrosis were accompanied by elevated levels of S1P and increased expression of SphK1 in capillarized liver sinusoidal endothelial cells (LSECs) in mice. SphK1 mRNA also increased in the livers of patients with MASH. Treatment of primary cultured mouse hepatic stellate cells (HSCs) with S1P stimulated their activation, which was mitigated by the S1P receptor (S1PR)2 inhibitor, JTE013. The inhibition of S1PR2 or its knockout in mice suppressed liver fibrosis without reducing steatosis or hepatocellular damage. CONCLUSION S1P level is increased in MASH livers and contributes to liver fibrosis via S1PR2.
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Affiliation(s)
- Yosuke Osawa
- Departments of Gastroenterology, International University of Health and Welfare Hospital, Tochigi, Japan
- Department of Liver Diseases, The Research Center for Hepatitis and Immunology, National Center for Global Health and Medicine, Chiba, Japan
| | - Hironari Kawai
- Department of Liver Diseases, The Research Center for Hepatitis and Immunology, National Center for Global Health and Medicine, Chiba, Japan
- Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Keigo Nakashima
- Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
- Departments of Surgery, International University of Health and Welfare Hospital, Tochigi, Japan
| | - Yuichi Nakaseko
- Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
- Departments of Surgery, International University of Health and Welfare Hospital, Tochigi, Japan
| | - Daisuke Suto
- Departments of Gastroenterology, International University of Health and Welfare Hospital, Tochigi, Japan
| | - Keisuke Yanagida
- Departments of Lipid Life Science, National Center for Global Health and Medicine, Tokyo, Japan
| | | | - Taizo Mori
- Department of Liver Diseases, The Research Center for Hepatitis and Immunology, National Center for Global Health and Medicine, Chiba, Japan
| | - Sachiyo Yoshio
- Department of Liver Diseases, The Research Center for Hepatitis and Immunology, National Center for Global Health and Medicine, Chiba, Japan
| | - Takaaki Ohtake
- Departments of Gastroenterology, International University of Health and Welfare Hospital, Tochigi, Japan
| | - Hideo Shindou
- Departments of Lipid Life Science, National Center for Global Health and Medicine, Tokyo, Japan
- Departments of Medical Lipid Science, Graduated Scholl of Medicine, The University of Tokyo, Tokyo, Japan
| | - Tatsuya Kanto
- Department of Liver Diseases, The Research Center for Hepatitis and Immunology, National Center for Global Health and Medicine, Chiba, Japan
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11
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Cao N, Zhang F, Yin J, Zhang J, Bian X, Zheng G, Li N, Lin Y, Luo L. LPCAT2 inhibits colorectal cancer progression via the PRMT1/SLC7A11 axis. Oncogene 2024; 43:1714-1725. [PMID: 38605214 PMCID: PMC11136653 DOI: 10.1038/s41388-024-02996-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 02/22/2024] [Accepted: 02/26/2024] [Indexed: 04/13/2024]
Abstract
Colorectal cancer (CRC) has a high degree of heterogeneity and identifying the genetic information of individual tumor cells could help enhance our understanding of tumor biology and uncover potential therapeutic targets for CRC. In this study, we identified LPCAT2+ tumor cell populations with less malignancy than LPCAT2- tumor cells in human and mouse CRC tissues using scRNA-seq. Combining in vitro and in vivo experiments, we found that LPCAT2 could inhibit the proliferation of CRC cells by inducing ferroptosis. Mechanistically, LPCAT2 arrested PRMT1 in cytoplasm of CRC cells via regulating acetylation of PRMT1 at the K145 site. In turn, PRMT1 enhanced SLC7A11 promoter activity. Thus, LPCAT2 attenuated the positive regulatory effect of PRMT1 on SLC7A11 promoter. Notably, SLC7A11 acts as a ferroptosis regulator. Furthermore, in LPCAT2 knockout mice (LPCAT2-/-) colon cancer model, we found that LPCAT2-/- mice exhibited more severe lesions, while PRMT1 or SLC7A11 inhibitors delayed the progression. Altogether, we elucidated that LPCAT2 suppresses SLC7A11 expression by inhibiting PRMT1 nuclear translocation, thereby inducing ferroptosis in CRC cells. Moreover, inhibitors of the PRMT1/SLC7A11 axis could delay tumor progression in CRC with low LPCAT2 expression, making it a potentially effective treatment for CRC.
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Affiliation(s)
- Nan Cao
- Department of Clinical Oncology, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, PR China
- Key Laboratory of Cancer Therapy Resistance and Clinical Translational Study, Shiyan, 442000, PR China
| | - Fangmei Zhang
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou Key Laboratory of "Translational Medicine on Malignant Tumor Treatment", Guangzhou, 510095, PR China
| | - Jiang Yin
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou Key Laboratory of "Translational Medicine on Malignant Tumor Treatment", Guangzhou, 510095, PR China
| | - Jianlei Zhang
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou Key Laboratory of "Translational Medicine on Malignant Tumor Treatment", Guangzhou, 510095, PR China
| | - Xiqing Bian
- School of Pharmacy, Macau University of Science and Technology, Macao, 999078, China
| | - Guopei Zheng
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou Key Laboratory of "Translational Medicine on Malignant Tumor Treatment", Guangzhou, 510095, PR China
| | - Nan Li
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou Key Laboratory of "Translational Medicine on Malignant Tumor Treatment", Guangzhou, 510095, PR China.
| | - Ying Lin
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou Key Laboratory of "Translational Medicine on Malignant Tumor Treatment", Guangzhou, 510095, PR China.
| | - Liyun Luo
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou Key Laboratory of "Translational Medicine on Malignant Tumor Treatment", Guangzhou, 510095, PR China.
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12
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Zhang Y, Ding Y, Weng M, Cui K, Yang M, Mai K, Ai Q. Molecular cloning, tissue expression pattern, responses to different fatty acids and potential functions of lysophosphatidylcholine acyltransferase 1 (LPCAT1) in large yellow croaker (Larimichthys crocea). Gene 2024; 896:148056. [PMID: 38042217 DOI: 10.1016/j.gene.2023.148056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 11/21/2023] [Accepted: 11/29/2023] [Indexed: 12/04/2023]
Abstract
In farmed fish, diets rich in palm oil have been observed to promote abnormal lipid build-up in the liver, subsequently leading to physiological harm and disease onset. Emerging research suggests that integrating phospholipids into the feed could serve as a potent countermeasure against hepatic impairments induced by vegetable oil consumption. Phosphatidylcholine is the most abundant type among phospholipids. In the metabolic processes of mammal, lysophosphatidylcholine acyltransferase 1 (LPCAT1), crucial for phosphatidylcholine remodeling, demonstrates a marked affinity towards palmitic acid (PA). Nonetheless, aspects concerning the cloning, tissue-specific distribution, and affinity of the LPCAT1 gene to diverse oil sources have yet to be elucidated in the large yellow croaker (Larimichthys crocea). Within the scope of this study, we successfully isolated and cloned the cDNA of the LPCAT1 gene from the large yellow croaker. Subsequent analysis revealed distinct gene expression patterns of LPCAT1 across ten different tissues of the species. The fully sequenced coding DNA sequence (CDS) of LPCAT1 spans 1503 bp and encodes a sequence of 500 amino acids. Comparative sequence alignment indicates that LPCAT1 shares a 69.75 % amino acid similarity with its counterparts in other species. Although LPCAT1 manifests across various tissues of the large yellow croaker, its predominance is markedly evident in the liver and gills. Furthermore, post exposure of the large yellow croaker's hepatocytes to varied fatty acids, PA has a strong response to LPCAT1. Upon the addition of appropriate lysolecithin to palm oil feed, the mRNA expression of LPCAT1 in the liver cells of the large yellow croaker showed significant variations compared to other subtypes. Concurrently, the mRNA expression of pro-inflammatory genes il-1β, il-6, il-8, tnf-α and ifn-γ in the liver tissue of the large yellow croaker decreased. Interestingly, they exhibit the same trend of change. In conclusion, we have cloned the LPCAT1 gene on fish successfully and find the augmented gene response of LPCAT1 in hepatocytes under PA treatment first. The results of this study suggest that LPCAT1 may be associated with liver inflammation in fish and offer new insights into mitigating liver diseases in fish caused by palm oil feed.
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Affiliation(s)
- Yiliang Zhang
- Key Laboratory of Aquaculture Nutrition and Feed (Ministry of Agriculture and Rural Affair), Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, 5 Yushan Road, 266003 Qingdao, Shandong, PR China.
| | - Yi Ding
- Key Laboratory of Aquaculture Nutrition and Feed (Ministry of Agriculture and Rural Affair), Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, 5 Yushan Road, 266003 Qingdao, Shandong, PR China
| | - Miao Weng
- Key Laboratory of Aquaculture Nutrition and Feed (Ministry of Agriculture and Rural Affair), Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, 5 Yushan Road, 266003 Qingdao, Shandong, PR China
| | - Kun Cui
- Key Laboratory of Aquaculture Nutrition and Feed (Ministry of Agriculture and Rural Affair), Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, 5 Yushan Road, 266003 Qingdao, Shandong, PR China
| | - Mengli Yang
- Key Laboratory of Aquaculture Nutrition and Feed (Ministry of Agriculture and Rural Affair), Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, 5 Yushan Road, 266003 Qingdao, Shandong, PR China
| | - Kangsen Mai
- Key Laboratory of Aquaculture Nutrition and Feed (Ministry of Agriculture and Rural Affair), Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, 5 Yushan Road, 266003 Qingdao, Shandong, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, 1 Wenhai Road, 266003 Qingdao, Shandong, PR China
| | - Qinghui Ai
- Key Laboratory of Aquaculture Nutrition and Feed (Ministry of Agriculture and Rural Affair), Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, 5 Yushan Road, 266003 Qingdao, Shandong, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, 1 Wenhai Road, 266003 Qingdao, Shandong, PR China.
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13
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Ishino T, Oda T, Kawasumi T, Takemoto K, Nishida M, Horibe Y, Chikuie N, Taruya T, Hamamoto T, Ueda T, Takeno S. Severe Type 2 Inflammation Leads to High Platelet-Activating-Factor-Associated Pathology in Chronic Rhinosinusitis with Nasal Polyps-A Hierarchical Cluster Analysis Using Bulk RNA Barcoding and Sequencing. Int J Mol Sci 2024; 25:2113. [PMID: 38396790 PMCID: PMC10889510 DOI: 10.3390/ijms25042113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 02/01/2024] [Accepted: 02/07/2024] [Indexed: 02/25/2024] Open
Abstract
Platelet-activating factor (PAF) is a phospholipid-derived inflammatory mediator that triggers various inflammatory conditions, including eosinophil activation and recruitment. This study aimed to evaluate the expressions of PAF-metabolism-associated genes, namely genes coding the enzymes involved in PAF synthesis (LPCAT1, LPCAT2, LPCAT3, and LPCAT4), PAF degradation (PAFAH1B2, PAFAH1B3, and PAFAH2), and the gene for the PAF receptor (PTAFR) in subtypes of CRSwNP classified by clinical- or hierarchal-analysis-based classifications. Transcriptomic analysis using bulk RNA barcoding and sequencing (BRB-seq) was performed with CRSwNP, including eosinophilic CRS (ECRS) (n = 9), nonECRS (n = 8), ECRS with aspirin-exacerbated respiratory disease (Asp) (n = 3), and controls with a normal uncinate process mucosa (n = 6). PTAFR was only upregulated in ECRS and nonECRS. In the hierarchical cluster analysis with clusters 1 and 2 reflecting patients with low-to-moderate and high levels of type 2 inflammation, respectively, cluster 1 exhibited a significant downregulation of LPCAT2 and an upregulation of PTAFR expression, while cluster 2 showed an upregulation of LPCAT1, PAFAH1B2, and PTAFR and downregulation of PAFAH2 expression. Understanding this strong PAF-associated pathophysiology in the severe type 2 inflammation group could provide valuable insights into the treatment and management of CRSwNP.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Sachio Takeno
- Department of Otorhinolaryngology, Head and Neck Surgery, Graduate School of Biomedical Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima 734-8551, Japan; (T.I.); (T.O.); (T.K.); (K.T.); (M.N.); (Y.H.); (N.C.); (T.T.); (T.H.); (T.U.)
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14
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Shimizu K, Ono M, Mikamoto T, Urayama Y, Yoshida S, Hase T, Michinaga S, Nakanishi H, Iwasaki M, Terada T, Sakurai F, Mizuguchi H, Shindou H, Tomita K, Nishinaka T. Overexpression of lysophospholipid acyltransferase, LPLAT10/LPCAT4/LPEAT2, in the mouse liver increases glucose-stimulated insulin secretion. FASEB J 2024; 38:e23425. [PMID: 38226852 DOI: 10.1096/fj.202301594rr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 12/22/2023] [Accepted: 12/29/2023] [Indexed: 01/17/2024]
Abstract
Postprandial hyperglycemia is an early indicator of impaired glucose tolerance that leads to type 2 diabetes mellitus (T2DM). Alterations in the fatty acid composition of phospholipids have been implicated in diseases such as T2DM and nonalcoholic fatty liver disease. Lysophospholipid acyltransferase 10 (LPLAT10, also called LPCAT4 and LPEAT2) plays a role in remodeling fatty acyl chains of phospholipids; however, its relationship with metabolic diseases has not been fully elucidated. LPLAT10 expression is low in the liver, the main organ that regulates metabolism, under normal conditions. Here, we investigated whether overexpression of LPLAT10 in the liver leads to improved glucose metabolism. For overexpression, we generated an LPLAT10-expressing adenovirus (Ad) vector (Ad-LPLAT10) using an improved Ad vector. Postprandial hyperglycemia was suppressed by the induction of glucose-stimulated insulin secretion in Ad-LPLAT10-treated mice compared with that in control Ad vector-treated mice. Hepatic and serum levels of phosphatidylcholine 40:7, containing C18:1 and C22:6, were increased in Ad-LPLAT10-treated mice. Serum from Ad-LPLAT10-treated mice showed increased glucose-stimulated insulin secretion in mouse insulinoma MIN6 cells. These results indicate that changes in hepatic phosphatidylcholine species due to liver-specific LPLAT10 overexpression affect the pancreas and increase glucose-stimulated insulin secretion. Our findings highlight LPLAT10 as a potential novel therapeutic target for T2DM.
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Affiliation(s)
- Kahori Shimizu
- Laboratory of Biochemistry, Faculty of Pharmacy, Osaka Ohtani University, Osaka, Japan
| | - Moe Ono
- Laboratory of Molecular Biology, Faculty of Pharmacy, Osaka Ohtani University, Osaka, Japan
| | - Takenari Mikamoto
- Laboratory of Biochemistry, Faculty of Pharmacy, Osaka Ohtani University, Osaka, Japan
| | - Yuya Urayama
- Laboratory of Biochemistry, Faculty of Pharmacy, Osaka Ohtani University, Osaka, Japan
| | - Sena Yoshida
- Laboratory of Molecular Biology, Faculty of Pharmacy, Osaka Ohtani University, Osaka, Japan
| | - Tomomi Hase
- Laboratory of Biochemistry, Faculty of Pharmacy, Osaka Ohtani University, Osaka, Japan
| | - Shotaro Michinaga
- Department of Pharmacodynamics, Meiji Pharmaceutical University, Tokyo, Japan
| | | | - Miho Iwasaki
- Laboratory of Biochemistry, Faculty of Pharmacy, Osaka Ohtani University, Osaka, Japan
| | - Tomoyuki Terada
- Laboratory of Biochemistry, Faculty of Pharmacy, Osaka Ohtani University, Osaka, Japan
| | - Fuminori Sakurai
- Laboratory of Biochemistry and Molecular Biology, Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Hiroyuki Mizuguchi
- Laboratory of Biochemistry and Molecular Biology, Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
- Global Center for Medical Engineering and Informatics, Osaka University, Osaka, Japan
- Laboratory of Functional Organoid for Drug Discovery, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan
- Integrated Frontier Research for Medical Science Division, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, Osaka, Japan
- Center for Infectious Disease Education and Research (CiDER), Osaka University, Osaka, Japan
| | - Hideo Shindou
- Department of Lipid Life Science, National Center for Global Health and Medicine, Tokyo, Japan
- Department of Medical Lipid Science, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Koji Tomita
- Laboratory of Molecular Biology, Faculty of Pharmacy, Osaka Ohtani University, Osaka, Japan
| | - Toru Nishinaka
- Laboratory of Biochemistry, Faculty of Pharmacy, Osaka Ohtani University, Osaka, Japan
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15
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de Oliveira Alves N, Dalmasso G, Nikitina D, Vaysse A, Ruez R, Ledoux L, Pedron T, Bergsten E, Boulard O, Autier L, Allam S, Motreff L, Sauvanet P, Letourneur D, Kashyap P, Gagnière J, Pezet D, Godfraind C, Salzet M, Lemichez E, Bonnet M, Najjar I, Malabat C, Monot M, Mestivier D, Barnich N, Yadav P, Fournier I, Kennedy S, Mettouchi A, Bonnet R, Sobhani I, Chamaillard M. The colibactin-producing Escherichia coli alters the tumor microenvironment to immunosuppressive lipid overload facilitating colorectal cancer progression and chemoresistance. Gut Microbes 2024; 16:2320291. [PMID: 38417029 PMCID: PMC10903627 DOI: 10.1080/19490976.2024.2320291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 02/14/2024] [Indexed: 03/01/2024] Open
Abstract
Intratumoral bacteria flexibly contribute to cellular and molecular tumor heterogeneity for supporting cancer recurrence through poorly understood mechanisms. Using spatial metabolomic profiling technologies and 16SrRNA sequencing, we herein report that right-sided colorectal tumors are predominantly populated with Colibactin-producing Escherichia coli (CoPEC) that are locally establishing a high-glycerophospholipid microenvironment with lowered immunogenicity. It coincided with a reduced infiltration of CD8+ T lymphocytes that produce the cytotoxic cytokines IFN-γ where invading bacteria have been geolocated. Mechanistically, the accumulation of lipid droplets in infected cancer cells relied on the production of colibactin as a measure to limit genotoxic stress to some extent. Such heightened phosphatidylcholine remodeling by the enzyme of the Land's cycle supplied CoPEC-infected cancer cells with sufficient energy for sustaining cell survival in response to chemotherapies. This accords with the lowered overall survival of colorectal patients at stage III-IV who were colonized by CoPEC when compared to patients at stage I-II. Accordingly, the sensitivity of CoPEC-infected cancer cells to chemotherapies was restored upon treatment with an acyl-CoA synthetase inhibitor. By contrast, such metabolic dysregulation leading to chemoresistance was not observed in human colon cancer cells that were infected with the mutant strain that did not produce colibactin (11G5∆ClbQ). This work revealed that CoPEC locally supports an energy trade-off lipid overload within tumors for lowering tumor immunogenicity. This may pave the way for improving chemoresistance and subsequently outcome of CRC patients who are colonized by CoPEC.
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Affiliation(s)
| | - Guillaume Dalmasso
- Microbes, Intestin, Inflammation et Susceptibilité de l’Hôte (M2iSH), Centre de Recherche en Nutrition Humaine Auvergne, Université Clermont Auvergne, Clermont-Ferrand, France
| | - Darja Nikitina
- CNRS, Institute Pasteur, Paris, France
- Laboratory of Clinical and Molecular Gastroenterology, Institute for Digestive Research, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Amaury Vaysse
- Institut Pasteur, Université Paris Cité, Bioinformatics and Biostatistics Hub, Plate-Forme Technologique Biomics, Paris, France
| | - Richard Ruez
- ONCOLille, INSERM, Phycell, University of Lille, Lille, France
| | - Lea Ledoux
- Réponse Inflammatoire et Spectrométrie de Masse-PRISM, University of Lille, Lille, France
| | | | - Emma Bergsten
- Institut Pasteur, Université Paris Cité, Paris, France
| | - Olivier Boulard
- ONCOLille, INSERM, Phycell, University of Lille, Lille, France
| | - Lora Autier
- ONCOLille, INSERM, Phycell, University of Lille, Lille, France
| | - Sofian Allam
- ONCOLille, INSERM, Phycell, University of Lille, Lille, France
| | - Laurence Motreff
- Institut Pasteur, Université Paris Cité, Bioinformatics and Biostatistics Hub, Plate-Forme Technologique Biomics, Paris, France
| | - Pierre Sauvanet
- Microbes, Intestin, Inflammation et Susceptibilité de l’Hôte (M2iSH), Centre de Recherche en Nutrition Humaine Auvergne, Université Clermont Auvergne, Clermont-Ferrand, France
| | | | - Pragya Kashyap
- Department of Bioscience & Bioengineering, Indian Institute of Technology, Jodhpur, Rajasthan, India
| | - Johan Gagnière
- Microbes, Intestin, Inflammation et Susceptibilité de l’Hôte (M2iSH), Centre de Recherche en Nutrition Humaine Auvergne, Université Clermont Auvergne, Clermont-Ferrand, France
| | - Denis Pezet
- Microbes, Intestin, Inflammation et Susceptibilité de l’Hôte (M2iSH), Centre de Recherche en Nutrition Humaine Auvergne, Université Clermont Auvergne, Clermont-Ferrand, France
| | - Catherine Godfraind
- Microbes, Intestin, Inflammation et Susceptibilité de l’Hôte (M2iSH), Centre de Recherche en Nutrition Humaine Auvergne, Université Clermont Auvergne, Clermont-Ferrand, France
| | - Michel Salzet
- Réponse Inflammatoire et Spectrométrie de Masse-PRISM, University of Lille, Lille, France
| | | | - Mathilde Bonnet
- Microbes, Intestin, Inflammation et Susceptibilité de l’Hôte (M2iSH), Centre de Recherche en Nutrition Humaine Auvergne, Université Clermont Auvergne, Clermont-Ferrand, France
| | - Imène Najjar
- Institut Pasteur, Université Paris Cité, Bioinformatics and Biostatistics Hub, Plate-Forme Technologique Biomics, Paris, France
| | - Christophe Malabat
- Institut Pasteur, Université Paris Cité, Bioinformatics and Biostatistics Hub, Plate-Forme Technologique Biomics, Paris, France
| | - Marc Monot
- Institut Pasteur, Université Paris Cité, Bioinformatics and Biostatistics Hub, Plate-Forme Technologique Biomics, Paris, France
| | | | - Nicolas Barnich
- Microbes, Intestin, Inflammation et Susceptibilité de l’Hôte (M2iSH), Centre de Recherche en Nutrition Humaine Auvergne, Université Clermont Auvergne, Clermont-Ferrand, France
| | - Pankaj Yadav
- Department of Bioscience & Bioengineering, Indian Institute of Technology, Jodhpur, Rajasthan, India
| | - Isabelle Fournier
- Réponse Inflammatoire et Spectrométrie de Masse-PRISM, University of Lille, Lille, France
| | | | | | - Richard Bonnet
- Microbes, Intestin, Inflammation et Susceptibilité de l’Hôte (M2iSH), Centre de Recherche en Nutrition Humaine Auvergne, Université Clermont Auvergne, Clermont-Ferrand, France
| | - Iradj Sobhani
- Université Paris Est Créteil, Créteil, France
- Service de Gastroentérologie CHU Henri Mondor, Assistance Publique des Hôpitaux de Paris-APHP, Créteil, France
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16
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Valentine WJ, Shimizu T, Shindou H. Lysophospholipid acyltransferases orchestrate the compositional diversity of phospholipids. Biochimie 2023; 215:24-33. [PMID: 37611890 DOI: 10.1016/j.biochi.2023.08.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 08/14/2023] [Accepted: 08/19/2023] [Indexed: 08/25/2023]
Abstract
Lysophospholipid acyltransferases (LPLATs), in concert with glycerol-3-phosphate acyltransferases (GPATs) and phospholipase A1/2s, orchestrate the compositional diversity of the fatty chains in membrane phospholipids. Fourteen LPLAT enzymes which come from two distinct families, AGPAT and MBOAT, have been identified, and in this mini-review we provide an overview of their roles in de novo and remodeling pathways of membrane phospholipid biosynthesis. Recently new nomenclature for LPLATs has been introduced (LPLATx, where x is a number 1-14), and we also give an overview of key biological functions that have been discovered for LPLAT1-14, revealed primarily through studies of LPLAT-gene-deficient mice as well as by linkages to various human diseases.
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Affiliation(s)
- William J Valentine
- Department of Molecular Therapy, National Institute of Neuroscience, National Center of Neurology and Psychiatry (NCNP), Kodaira, Tokyo, 187-8502, Japan.
| | - Takao Shimizu
- Department of Lipid Signaling, National Center for Global Health and Medicine (NCGM), Shinjuku-ku, Tokyo, 162-8655, Japan; Institute of Microbial Chemistry, Shinagawa-ku, Tokyo, 141-0021, Japan
| | - Hideo Shindou
- Department of Lipid Life Science, National Center for Global Health and Medicine (NCGM), Shinjuku-ku, Tokyo, 162-8655, Japan; Department of Lipid Medical Science, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, 113-0033, Japan.
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Siani-Rose M, McKee R, Cox S, Goldstein B, Abrams D, Taylor M, Kurek I. The Potential of Salivary Lipid-Based Cannabis-Responsive Biomarkers to Evaluate Medical Cannabis Treatment in Children with Autism Spectrum Disorder. Cannabis Cannabinoid Res 2023; 8:642-656. [PMID: 35343818 DOI: 10.1089/can.2021.0224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Introduction: Autism spectrum disorder (ASD) is a group of heterogeneous neurodevelopmental conditions affecting social communication and social interaction. Medical cannabis (MC) treatment shows promising results as an approach to reduce behavioral difficulties, as determined mainly by subjective observations. We have recently shown the potential of cannabis-responsive biomarkers detected in saliva of children with ASD to objectively quantify the impact of successful MC treatment using a metabolomics approach. Since the pathology of ASD is associated with abnormal lipid metabolism, we used lipidomics on the same samples to (1) expand the repertoire of cannabis-responsive biomarkers and (2) provide preliminary insight into the role of MC on lipid metabolism. Materials and Methods: Saliva samples collected from children with ASD (n=15) treated with MC (both before and at the time of maximal impact of treatment) and an age-matched group of typically developing (TD) children (n=9) were subjected to untargeted lipidomics. The study was observational. Each child from the ASD group was receiving a unique individualized MC treatment regimen using off-the-shelf products as permitted by California law under physician supervision for at least 1 year. Doses of tetrahydrocannabinol (THC) ranged from 0.05 to 50 mg and cannabidiol (CBD) from 7.5 to 200 mg per treatment. The ASD group was evaluated for signs of improvement using parental brief Likert scale surveys. Results: Twenty-two potential lipid-based cannabis-responsive biomarkers exhibiting a shift toward the TD physiological levels in children with ASD after MC treatment were identified. Members from all five lipid subclasses known to be present in saliva were characterized. Preliminary lipid association network analysis suggests involvement of two subnetworks previously linked to (1) inflammation and/or redox regulation and (2) oxidative stress. The significant changes in sphingomyelin in this study and in N-acetyl-aspartate (NAA) previously detected in the metabolomics analysis of the same saliva samples may indicate a role of MC in neuron function. Conclusions: Our findings suggest that lipid metabolites in saliva can potentially serve as cannabis-responsive biomarkers and objectively quantify the impact of MC treatment, and indicate a possible mechanism of action for MC. This preliminary study requires further investigation with a larger population and appropriate clinical trial monitoring.
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Affiliation(s)
| | - Robert McKee
- Cannformatics, Inc., San Francisco, California, USA
| | - Stephany Cox
- Cannformatics, Inc., San Francisco, California, USA
| | | | | | | | - Itzhak Kurek
- Cannformatics, Inc., San Francisco, California, USA
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18
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Kimura T, Kimura AK, Epand RM. Systematic crosstalk in plasmalogen and diacyl lipid biosynthesis for their differential yet concerted molecular functions in the cell. Prog Lipid Res 2023; 91:101234. [PMID: 37169310 DOI: 10.1016/j.plipres.2023.101234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 04/29/2023] [Accepted: 05/05/2023] [Indexed: 05/13/2023]
Abstract
Plasmalogen is a major phospholipid of mammalian cell membranes. Recently it is becoming evident that the sn-1 vinyl-ether linkage in plasmalogen, contrasting to the ester linkage in the counterpart diacyl glycerophospholipid, yields differential molecular characteristics for these lipids especially related to hydrocarbon-chain order, so as to concertedly regulate biological membrane processes. A role played by NMR in gaining information in this respect, ranging from molecular to tissue levels, draws particular attention. We note here that a broad range of enzymes in de novo synthesis pathway of plasmalogen commonly constitute that of diacyl glycerophospholipid. This fact forms the basis for systematic crosstalk that not only controls a quantitative balance between these lipids, but also senses a defect causing loss of lipid in either pathway for compensation by increase of the counterpart lipid. However, this inherent counterbalancing mechanism paradoxically amplifies imbalance in differential effects of these lipids in a diseased state on membrane processes. While sharing of enzymes has been recognized, it is now possible to overview the crosstalk with growing information for specific enzymes involved. The overview provides a fundamental clue to consider cell and tissue type-dependent schemes in regulating membrane processes by plasmalogen and diacyl glycerophospholipid in health and disease.
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Affiliation(s)
- Tomohiro Kimura
- Department of Chemistry & Department of Biochemistry and Molecular Biophysics, Kansas State University, Manhattan, Kansas 66506, USA.
| | - Atsuko K Kimura
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario L8S 4K1, Canada
| | - Richard M Epand
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario L8S 4K1, Canada
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19
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de Carvalho JCS, da Silva-Neto PV, Toro DM, Fuzo CA, Nardini V, Pimentel VE, Pérez MM, Fraga-Silva TFC, Oliveira CNS, Degiovani AM, Ostini FM, Feitosa MR, Parra RS, da Rocha JJR, Feres O, Vilar FC, Gaspar GG, Santos IKFM, Fernandes APM, Maruyama SR, Russo EMS, Bonato VLD, Cardoso CRB, Dias-Baruffi M, Faccioli LH, Sorgi CA. The Interplay among Glucocorticoid Therapy, Platelet-Activating Factor and Endocannabinoid Release Influences the Inflammatory Response to COVID-19. Viruses 2023; 15:v15020573. [PMID: 36851787 PMCID: PMC9959303 DOI: 10.3390/v15020573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/06/2023] [Accepted: 02/17/2023] [Indexed: 02/22/2023] Open
Abstract
COVID-19 is associated with a dysregulated immune response. Currently, several medicines are licensed for the treatment of this disease. Due to their significant role in inhibiting pro-inflammatory cytokines and lipid mediators, glucocorticoids (GCs) have attracted a great deal of attention. Similarly, the endocannabinoid (eCB) system regulates various physiological processes including the immunological response. Additionally, during inflammatory and thrombotic processes, phospholipids from cell membranes are cleaved to produce platelet-activating factor (PAF), another lipid mediator. Nonetheless, the effect of GCs on this lipid pathway during COVID-19 therapy is still unknown. This is a cross-sectional study involving COVID-19 patients (n = 200) and healthy controls (n = 35). Target tandem mass spectrometry of plasma lipid mediators demonstrated that COVID-19 severity affected eCBs and PAF synthesis. This increased synthesis of eCB was adversely linked with systemic inflammatory markers IL-6 and sTREM-1 levels and neutrophil counts. The use of GCs altered these lipid pathways by reducing PAF and increasing 2-AG production. Corroborating this, transcriptome analysis of GC-treated patients blood leukocytes showed differential modulation of monoacylglycerol lipase and phospholipase A2 gene expression. Altogether, these findings offer a breakthrough in our understanding of COVID-19 pathophysiology, indicating that GCs may promote additional protective pharmacological effects by influencing the eCB and PAF pathways involved in the disease course.
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Affiliation(s)
- Jonatan C. S. de Carvalho
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto-FFCLRP, Universidade de São Paulo-USP, Ribeirao Preto 14040-901, SP, Brazil
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto-FCFRP, Universidade de São Paulo-USP, Ribeirao Preto 14040-903, SP, Brazil
| | - Pedro V. da Silva-Neto
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto-FCFRP, Universidade de São Paulo-USP, Ribeirao Preto 14040-903, SP, Brazil
- Programa de Pós-Graduação em Imunologia Básica e Aplicada-PPGIBA, Instituto de Ciências Biológicas, Universidade Federal do Amazonas-UFAM, Manaus 69080-900, AM, Brazil
| | - Diana M. Toro
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto-FCFRP, Universidade de São Paulo-USP, Ribeirao Preto 14040-903, SP, Brazil
- Programa de Pós-Graduação em Imunologia Básica e Aplicada-PPGIBA, Instituto de Ciências Biológicas, Universidade Federal do Amazonas-UFAM, Manaus 69080-900, AM, Brazil
| | - Carlos A. Fuzo
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto-FCFRP, Universidade de São Paulo-USP, Ribeirao Preto 14040-903, SP, Brazil
| | - Viviani Nardini
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto-FCFRP, Universidade de São Paulo-USP, Ribeirao Preto 14040-903, SP, Brazil
| | - Vinícius E. Pimentel
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto-FCFRP, Universidade de São Paulo-USP, Ribeirao Preto 14040-903, SP, Brazil
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto-FMRP, Universidade de São Paulo-USP, Ribeirao Preto 14040-900, SP, Brazil
| | - Malena M. Pérez
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto-FCFRP, Universidade de São Paulo-USP, Ribeirao Preto 14040-903, SP, Brazil
| | - Thais F. C. Fraga-Silva
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto-FMRP, Universidade de São Paulo-USP, Ribeirao Preto 14040-900, SP, Brazil
| | - Camilla N. S. Oliveira
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto-FCFRP, Universidade de São Paulo-USP, Ribeirao Preto 14040-903, SP, Brazil
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto-FMRP, Universidade de São Paulo-USP, Ribeirao Preto 14040-900, SP, Brazil
| | - Augusto M. Degiovani
- Hospital Santa Casa de Misericórdia de Ribeirão Preto, Ribeirao Preto 14085-000, SP, Brazil
| | - Fátima M. Ostini
- Hospital Santa Casa de Misericórdia de Ribeirão Preto, Ribeirao Preto 14085-000, SP, Brazil
| | - Marley R. Feitosa
- Departamento de Cirurgia e Anatomia, Faculdade de Medicina de Ribeirão Preto-FMRP, Universidade de São Paulo-USP, Ribeirao Preto 14048-900, SP, Brazil
| | - Rogerio S. Parra
- Departamento de Cirurgia e Anatomia, Faculdade de Medicina de Ribeirão Preto-FMRP, Universidade de São Paulo-USP, Ribeirao Preto 14048-900, SP, Brazil
| | - José J. R. da Rocha
- Departamento de Cirurgia e Anatomia, Faculdade de Medicina de Ribeirão Preto-FMRP, Universidade de São Paulo-USP, Ribeirao Preto 14048-900, SP, Brazil
| | - Omar Feres
- Departamento de Cirurgia e Anatomia, Faculdade de Medicina de Ribeirão Preto-FMRP, Universidade de São Paulo-USP, Ribeirao Preto 14048-900, SP, Brazil
| | - Fernando C. Vilar
- Departamento de Clínica Médica, Faculdade de Medicina de Ribeirão Preto-FMRP, Universidade de São Paulo-USP, Ribeirao Preto 14049-900, SP, Brazil
| | - Gilberto G. Gaspar
- Departamento de Clínica Médica, Faculdade de Medicina de Ribeirão Preto-FMRP, Universidade de São Paulo-USP, Ribeirao Preto 14049-900, SP, Brazil
| | - Isabel K. F. M. Santos
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto-FMRP, Universidade de São Paulo-USP, Ribeirao Preto 14040-900, SP, Brazil
| | - Ana P. M. Fernandes
- Departamento de Enfermagem Geral e Especializada, Escola de Enfermagem de Ribeirão Preto-EERP, Universidade de São Paulo-USP, Ribeirao Preto 14040-902, SP, Brazil
| | - Sandra R. Maruyama
- Departamento de Genética e Evolução, Centro de Ciências Biológicas e da Saúde, Universidade Federal de São Carlos-UFSCar, Sao Carlos 13565-905, SP, Brazil
| | - Elisa M. S. Russo
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto-FCFRP, Universidade de São Paulo-USP, Ribeirao Preto 14040-903, SP, Brazil
| | - Vânia L. D. Bonato
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto-FMRP, Universidade de São Paulo-USP, Ribeirao Preto 14040-900, SP, Brazil
| | - Cristina R. B. Cardoso
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto-FCFRP, Universidade de São Paulo-USP, Ribeirao Preto 14040-903, SP, Brazil
| | - Marcelo Dias-Baruffi
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto-FCFRP, Universidade de São Paulo-USP, Ribeirao Preto 14040-903, SP, Brazil
| | - Lúcia H. Faccioli
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto-FCFRP, Universidade de São Paulo-USP, Ribeirao Preto 14040-903, SP, Brazil
| | - Carlos A. Sorgi
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto-FFCLRP, Universidade de São Paulo-USP, Ribeirao Preto 14040-901, SP, Brazil
- Programa de Pós-Graduação em Imunologia Básica e Aplicada-PPGIBA, Instituto de Ciências Biológicas, Universidade Federal do Amazonas-UFAM, Manaus 69080-900, AM, Brazil
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto-FMRP, Universidade de São Paulo-USP, Ribeirao Preto 14040-900, SP, Brazil
- Correspondence: ; Tel.: +55-(16)-3315-9176
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20
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Classes of Lipid Mediators and Their Effects on Vascular Inflammation in Atherosclerosis. Int J Mol Sci 2023; 24:ijms24021637. [PMID: 36675152 PMCID: PMC9863938 DOI: 10.3390/ijms24021637] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 01/06/2023] [Accepted: 01/08/2023] [Indexed: 01/18/2023] Open
Abstract
It is commonly believed that the inactivation of inflammation is mainly due to the decay or cessation of inducers. In reality, in connection with the development of atherosclerosis, spontaneous decay of inducers is not observed. It is now known that lipid mediators originating from polyunsaturated fatty acids (PUFAs), which are important constituents of all cell membranes, can act in the inflamed tissue and bring it to resolution. In fact, PUFAs, such as arachidonic acid (AA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA), are precursors to both pro-inflammatory and anti-inflammatory compounds. In this review, we describe the lipid mediators of vascular inflammation and resolution, and their biochemical activity. In addition, we highlight data from the literature that often show a worsening of atherosclerotic disease in subjects deficient in lipid mediators of inflammation resolution, and we also report on the anti-proteasic and anti-thrombotic properties of these same lipid mediators. It should be noted that despite promising data observed in both animal and in vitro studies, contradictory clinical results have been observed for omega-3 PUFAs. Many further studies will be required in order to clarify the observed conflicts, although lifestyle habits such as smoking or other biochemical factors may often influence the normal synthesis of lipid mediators of inflammation resolution.
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21
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Kawaguchi K, Nagao H, Shindou H, Noguchi H. Conformations of Three Types of Ultra-Long-Chain Fatty Acids in Multicomponent Lipid Bilayers. J Phys Chem B 2022; 126:9316-9324. [PMID: 36334092 DOI: 10.1021/acs.jpcb.2c06189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Ultra-long-chain fatty acids (ULCFAs) are biosynthesized in certain types of tissues, but their biological roles remain unknown. Here, we report how the conformation of ULCFAs depends on the length and unsaturated-bond ratio of the ultra-long chains and the composition of the host bilayer membrane using molecular dynamics simulations. The ultra-long chain of ULCFAs flips between the two leaflets and fluctuates among three conformations: elongated, L-shaped, and turned. Furthermore, we found that the saturated ultra-long chain exhibited an elongated conformation more frequently than the unsaturated chain. In addition, the truncation of the ultra-long chain at C26 had little effect on the remaining ULCFAs. ULCFAs respond to lipid-density differences in the two leaflets, and the ratio of the elongated and turned conformations changed to reduce this difference. However, in cholesterol-containing membranes, ULCFAs exhibit no density difference after the flip-flop of cholesterol removes the difference.
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Affiliation(s)
- Kazutomo Kawaguchi
- Institute of Science and Engineering, Kanazawa University, Kanazawa920-1192, Ishikawa, Japan
| | - Hidemi Nagao
- Institute of Science and Engineering, Kanazawa University, Kanazawa920-1192, Ishikawa, Japan
| | - Hideo Shindou
- Department of Lipid Life Science, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo162-8655, Japan.,Department of Medical Lipid Science, Graduate School of Medicine, University of Tokyo, Bunkyo-ku, Tokyo113-0033, Japan
| | - Hiroshi Noguchi
- Institute for Solid State Physics, University of Tokyo, Kashiwa277-8581, Chiba, Japan
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22
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Sánchez Crespo M, Montero O, Fernandez N. The role of PAF in immunopathology: From immediate hypersensitivity reactions to fungal defense. Biofactors 2022; 48:1217-1225. [PMID: 36176024 PMCID: PMC10087027 DOI: 10.1002/biof.1888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 09/03/2022] [Indexed: 12/24/2022]
Abstract
Platelet-activating factor (PAF, 1-alkyl-2-acetyl-sn-glycero-3-phosphorylcholine) was discovered when the mechanisms involved in the deposition of immune complex in tissues were being scrutinized in the experimental model of rabbit serum sickness. The initial adscription of PAF to IgE-dependent anaphylaxis was soon extended after disclosing its release from phagocytes stimulated by calcium mobilizing agents, formylated peptides, and phagocytosable particles. This explains why ongoing research in the field turned to the analysis of immune cell types and stimuli involved in PAF production with the purpose of establishing its role in pathology. This was spurred by the identification of the chemical structure of PAF and the enzymic mechanisms involved in its biosynthesis and degradation, which showed commonalities with those involved in eicosanoid production and the Lands' cycle of phospholipid fatty acid remodeling. The reassignment of PAF function in immunopathology is explained by the finding that the most robust mechanisms leading to PAF production are associated with opsonic and non-opsonic phagocytosis, depending on the cell type. While polymorphonuclear leukocytes exhibit opsonic phagocytosis, monocyte-derived dendritic cells show a marked preference for non-opsonic phagocytosis associated with C-type lectin receptors. This is particularly relevant to the defense against fungal invasion and explains why PAF exerts an autocrine feed-forwarding mechanism required for the selective expression of some cytokines.
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Affiliation(s)
- Mariano Sánchez Crespo
- Unidad de Excelencia Instituto de Biología y Genética Molecular, CSIC-Universidad de Valladolid, Valladolid, Spain
| | - Olimpio Montero
- Unidad de Excelencia Instituto de Biología y Genética Molecular, CSIC-Universidad de Valladolid, Valladolid, Spain
| | - Nieves Fernandez
- Unidad de Excelencia Instituto de Biología y Genética Molecular, CSIC-Universidad de Valladolid, Valladolid, Spain
- Departamento de Bioquímica y Biología Molecular, y Fisiología, Facultad de Medicina, Universidad de Valladolid, Valladolid, Spain
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Dorninger F, Werner ER, Berger J, Watschinger K. Regulation of plasmalogen metabolism and traffic in mammals: The fog begins to lift. Front Cell Dev Biol 2022; 10:946393. [PMID: 36120579 PMCID: PMC9471318 DOI: 10.3389/fcell.2022.946393] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 07/25/2022] [Indexed: 12/15/2022] Open
Abstract
Due to their unique chemical structure, plasmalogens do not only exhibit distinct biophysical and biochemical features, but require specialized pathways of biosynthesis and metabolization. Recently, major advances have been made in our understanding of these processes, for example by the attribution of the gene encoding the enzyme, which catalyzes the final desaturation step in plasmalogen biosynthesis, or by the identification of cytochrome C as plasmalogenase, which allows for the degradation of plasmalogens. Also, models have been presented that plausibly explain the maintenance of adequate cellular levels of plasmalogens. However, despite the progress, many aspects around the questions of how plasmalogen metabolism is regulated and how plasmalogens are distributed among organs and tissues in more complex organisms like mammals, remain unresolved. Here, we summarize and interpret current evidence on the regulation of the enzymes involved in plasmalogen biosynthesis and degradation as well as the turnover of plasmalogens. Finally, we focus on plasmalogen traffic across the mammalian body - a topic of major importance, when considering plasmalogen replacement therapies in human disorders, where deficiencies in these lipids have been reported. These involve not only inborn errors in plasmalogen metabolism, but also more common diseases including Alzheimer's disease and neurodevelopmental disorders.
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Affiliation(s)
- Fabian Dorninger
- Department of Pathobiology of the Nervous System, Center for Brain Research, Medical University of Vienna, Vienna, Austria,*Correspondence: Fabian Dorninger, ; Katrin Watschinger,
| | - Ernst R. Werner
- Institute of Biological Chemistry, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Johannes Berger
- Department of Pathobiology of the Nervous System, Center for Brain Research, Medical University of Vienna, Vienna, Austria
| | - Katrin Watschinger
- Institute of Biological Chemistry, Biocenter, Medical University of Innsbruck, Innsbruck, Austria,*Correspondence: Fabian Dorninger, ; Katrin Watschinger,
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24
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Possible Regulation of Toll-Like Receptor 4 By Lysine Acetylation Through LPCAT2 Activity in RAW264.7 Cells. Biosci Rep 2022; 42:231468. [PMID: 35735109 PMCID: PMC9289797 DOI: 10.1042/bsr20220251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 06/16/2022] [Accepted: 06/22/2022] [Indexed: 11/17/2022] Open
Abstract
Inflammation is central to several diseases. TLR4 mediates inflammation by recognising and binding to bacterial lipopolysaccharides and interacting with other proteins in the TLR4 signalling pathway. Although there is extensive research on TLR4-mediated inflammation, there are gaps in understanding its mechanisms. Recently, TLR4 co-localised with LPCAT2, a lysophospholipid acetyltransferase. LPCAT2 is already known to influence lipopolysaccharide-induced inflammation; however, the mechanism of LPCAT2 influencing lipopolysaccharide-mediated inflammation is not understood. The present study combined computational analysis with biochemical analysis to investigate the influence of LPCAT2 on lysine acetylation in LPS-treated RAW264.7 cells. The results suggest for the first time that LPCAT2 influences lysine acetylation in LPS-treated RAW264.7 cells. Moreover, we detected acetylated lysine residues on TLR4. The present study lays a foundation for further research on the role of lysine acetylation on TLR4 signalling. Moreover, further research is required to characterise LPCAT2 as a protein acetyltransferase.
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Delpero M, Arends D, Freiberg A, Brockmann GA, Hesse D. QTL-mapping in the obese Berlin Fat Mouse identifies additional candidate genes for obesity and fatty liver disease. Sci Rep 2022; 12:10471. [PMID: 35729251 PMCID: PMC9213485 DOI: 10.1038/s41598-022-14316-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 06/06/2022] [Indexed: 11/29/2022] Open
Abstract
The Berlin Fat Mouse Inbred line (BFMI) is a model for obesity and the metabolic syndrome. This study aimed to identify genetic variants associated with liver weight, liver triglycerides, and body weight using the obese BFMI sub-line BFMI861-S1. BFMI861-S1 mice are insulin resistant and store ectopic fat in the liver. In generation 10, 58 males and 65 females of the advanced intercross line (AIL) BFMI861-S1xB6N were phenotyped under a standard diet over 20 weeks. QTL analysis was performed after genotyping with the MiniMUGA Genotyping Array. Whole-genome sequencing and gene expression data of the parental lines was used for the prioritization of positional candidate genes. Three QTLs associated with liver weight, body weight, and subcutaneous adipose tissue (scAT) weight were identified. A highly significant QTL on chromosome (Chr) 1 (157–168 Mb) showed an association with liver weight. A QTL for body weight at 20 weeks was found on Chr 3 (34.1–40 Mb) overlapping with a QTL for scAT weight. In a multiple QTL mapping approach, an additional QTL affecting body weight at 16 weeks was identified on Chr 6 (9.5–26.1 Mb). Considering sequence variants and expression differences, Sec16b and Astn1 were prioritized as top positional candidate genes for the liver weight QTL on Chr 1; Met and Ica1 for the body weight QTL on Chr 6. Interestingly, all top candidate genes have previously been linked with metabolic traits. This study shows once more the power of an advanced intercross line for fine mapping. QTL mapping combined with a detailed prioritization approach allowed us to identify additional and plausible candidate genes linked to metabolic traits in the BFMI861-S1xB6N AIL. By reidentifying known candidate genes in a different crossing population the causal link with specific traits is underlined and additional evidence is given for further investigations.
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Affiliation(s)
- Manuel Delpero
- Department for Crop and Animal Sciences, Albrecht Daniel Thaer-Institute of Agricultural and Horticultural Sciences Humboldt-Universität Zu Berlin, Unter den Linden 6, 10099, Berlin, Germany
| | - Danny Arends
- Department for Crop and Animal Sciences, Albrecht Daniel Thaer-Institute of Agricultural and Horticultural Sciences Humboldt-Universität Zu Berlin, Unter den Linden 6, 10099, Berlin, Germany
| | - Aimée Freiberg
- Department for Crop and Animal Sciences, Albrecht Daniel Thaer-Institute of Agricultural and Horticultural Sciences Humboldt-Universität Zu Berlin, Unter den Linden 6, 10099, Berlin, Germany
| | - Gudrun A Brockmann
- Department for Crop and Animal Sciences, Albrecht Daniel Thaer-Institute of Agricultural and Horticultural Sciences Humboldt-Universität Zu Berlin, Unter den Linden 6, 10099, Berlin, Germany
| | - Deike Hesse
- Department for Crop and Animal Sciences, Albrecht Daniel Thaer-Institute of Agricultural and Horticultural Sciences Humboldt-Universität Zu Berlin, Unter den Linden 6, 10099, Berlin, Germany.
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Watanabe A, Hama K, Watanabe K, Fujiwara Y, Yokoyama K, Murata S, Takita R. Controlled Tetradeuteration of Straight‐Chain Fatty Acids: Synthesis, Application, and Insight into the Metabolism of Oxidized Linoleic Acid. Angew Chem Int Ed Engl 2022; 61:e202202779. [PMID: 35411582 PMCID: PMC9324819 DOI: 10.1002/anie.202202779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Ayako Watanabe
- One-stop Sharing Facility Center for Future Drug Discoveries Graduate School of Pharmaceutical Sciences University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Kotaro Hama
- Faculty of Pharma-Sciences Teikyo University 2-11-1 Kaga, Itabashi-ku Tokyo 173-8605 Japan
- Advanced Comprehensive Research Organization (ACRO) Teikyo University Japan
| | - Kohei Watanabe
- One-stop Sharing Facility Center for Future Drug Discoveries Graduate School of Pharmaceutical Sciences University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Yuko Fujiwara
- Faculty of Pharma-Sciences Teikyo University 2-11-1 Kaga, Itabashi-ku Tokyo 173-8605 Japan
| | - Kazuaki Yokoyama
- Faculty of Pharma-Sciences Teikyo University 2-11-1 Kaga, Itabashi-ku Tokyo 173-8605 Japan
| | - Shigeo Murata
- One-stop Sharing Facility Center for Future Drug Discoveries Graduate School of Pharmaceutical Sciences University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Ryo Takita
- One-stop Sharing Facility Center for Future Drug Discoveries Graduate School of Pharmaceutical Sciences University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
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27
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Abnormal male reproduction and embryonic development induced by downregulation of a phospholipid fatty acid-introducing enzyme Lpgat1 in zebrafish. Sci Rep 2022; 12:7312. [PMID: 35508627 PMCID: PMC9068807 DOI: 10.1038/s41598-022-11002-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 04/18/2022] [Indexed: 11/23/2022] Open
Abstract
Phospholipids in the membrane consist of diverse pairs of fatty acids bound to a glycerol backbone. The biological significance of the diversity, however, remains mostly unclear. Part of this diversity is due to lysophospholipid acyltransferases (LPLATs), which introduce a fatty acid into lysophospholipids. The human genome has 14 LPLATs and most of them are highly conserved in vertebrates. Here, we analyzed the function of one of these enzymes, lysophosphatidylglycerol acyltransferase 1 (Lpgat1), in zebrafish. We found that the reproduction of heterozygous (lpgat1+/−) male mutants was abnormal. Crosses between heterozygous males and wild-type females produced many eggs with no obvious cleavage, whereas eggs produced by crosses between heterozygous females and wild-type males cleaved normally. Consistent with this, spermatozoa from heterozygous males had reduced motility and abnormal morphology. We also found that the occurrence of lpgat1 homozygous (lpgat1−/−) mutants was far lower than expected. In addition, downregulation of lpgat1 by morpholino antisense oligonucleotides resulted in severe developmental defects. Lipidomic analysis revealed that selective phospholipid species with stearic acid and docosahexaenoic acid were reduced in homozygous larvae and spermatozoa from heterozygotes. These results suggest that the specific phospholipid molecular species produced by Lpgat1 have an essential role in sperm fertilization and in embryonic development.
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28
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Saito RDF, Andrade LNDS, Bustos SO, Chammas R. Phosphatidylcholine-Derived Lipid Mediators: The Crosstalk Between Cancer Cells and Immune Cells. Front Immunol 2022; 13:768606. [PMID: 35250970 PMCID: PMC8889569 DOI: 10.3389/fimmu.2022.768606] [Citation(s) in RCA: 52] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 01/13/2022] [Indexed: 01/16/2023] Open
Abstract
To become resistant, cancer cells need to activate and maintain molecular defense mechanisms that depend on an energy trade-off between resistance and essential functions. Metabolic reprogramming has been shown to fuel cell growth and contribute to cancer drug resistance. Recently, changes in lipid metabolism have emerged as an important driver of resistance to anticancer agents. In this review, we highlight the role of choline metabolism with a focus on the phosphatidylcholine cycle in the regulation of resistance to therapy. We analyze the contribution of phosphatidylcholine and its metabolites to intracellular processes of cancer cells, both as the major cell membrane constituents and source of energy. We further extended our discussion about the role of phosphatidylcholine-derived lipid mediators in cellular communication between cancer and immune cells within the tumor microenvironment, as well as their pivotal role in the immune regulation of therapeutic failure. Changes in phosphatidylcholine metabolism are part of an adaptive program activated in response to stress conditions that contribute to cancer therapy resistance and open therapeutic opportunities for treating drug-resistant cancers.
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Affiliation(s)
- Renata de Freitas Saito
- Centro de Investigação Translacional em Oncologia (LIM24), Departamento de Radiologia e Oncologia, Faculdade de Medicina da Universidade de São Paulo and Instituto do Câncer do Estado de São Paulo, São Paulo, Brazil
| | - Luciana Nogueira de Sousa Andrade
- Centro de Investigação Translacional em Oncologia (LIM24), Departamento de Radiologia e Oncologia, Faculdade de Medicina da Universidade de São Paulo and Instituto do Câncer do Estado de São Paulo, São Paulo, Brazil
| | - Silvina Odete Bustos
- Centro de Investigação Translacional em Oncologia (LIM24), Departamento de Radiologia e Oncologia, Faculdade de Medicina da Universidade de São Paulo and Instituto do Câncer do Estado de São Paulo, São Paulo, Brazil
| | - Roger Chammas
- Centro de Investigação Translacional em Oncologia (LIM24), Departamento de Radiologia e Oncologia, Faculdade de Medicina da Universidade de São Paulo and Instituto do Câncer do Estado de São Paulo, São Paulo, Brazil
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29
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Watanabe A, Hama K, Watanabe K, Fujiwara Y, Yokoyama K, Murata S, Takita R. Controlled Tetradeuteration of Straight‐Chain Fatty Acids: Synthesis, Application, and Insight into the Metabolism of Oxidized Linoleic Acid. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202202779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ayako Watanabe
- One-stop Sharing Facility Center for Future Drug Discoveries Graduate School of Pharmaceutical Sciences University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Kotaro Hama
- Faculty of Pharma-Sciences Teikyo University 2-11-1 Kaga, Itabashi-ku Tokyo 173-8605 Japan
- Advanced Comprehensive Research Organization (ACRO) Teikyo University Japan
| | - Kohei Watanabe
- One-stop Sharing Facility Center for Future Drug Discoveries Graduate School of Pharmaceutical Sciences University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Yuko Fujiwara
- Faculty of Pharma-Sciences Teikyo University 2-11-1 Kaga, Itabashi-ku Tokyo 173-8605 Japan
| | - Kazuaki Yokoyama
- Faculty of Pharma-Sciences Teikyo University 2-11-1 Kaga, Itabashi-ku Tokyo 173-8605 Japan
| | - Shigeo Murata
- One-stop Sharing Facility Center for Future Drug Discoveries Graduate School of Pharmaceutical Sciences University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Ryo Takita
- One-stop Sharing Facility Center for Future Drug Discoveries Graduate School of Pharmaceutical Sciences University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
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30
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Rong P, Wang JL, Angelova A, Almsherqi ZA, Deng Y. Plasmalogenic Lipid Analogs as Platelet-Activating Factor Antagonists: A Potential Novel Class of Anti-inflammatory Compounds. Front Cell Dev Biol 2022; 10:859421. [PMID: 35493091 PMCID: PMC9048793 DOI: 10.3389/fcell.2022.859421] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 03/24/2022] [Indexed: 12/31/2022] Open
Abstract
Plasmalogens and Platelet-Activating Factor (PAF) are both bioactive ether phospholipids. Whereas plasmalogens are recognized for their important antioxidant function and modulatory role in cell membrane structure and dynamics, PAF is a potent pro-inflammatory lipid mediator known to have messenger functions in cell signaling and inflammatory response. The relationship between these two types of lipids has been rarely studied in terms of their metabolic interconversion and reciprocal modulation of the pro-inflammation/anti-inflammation balance. The vinyl-ether bonded plasmalogen lipid can be the lipid sources for the precursor of the biosynthesis of ether-bonded PAF. In this opinion paper, we suggest a potential role of plasmalogenic analogs of PAF as modulators and PAF antagonists (anti-PAF). We discuss that the metabolic interconversion of these two lipid kinds may be explored towards the development of efficient preventive and relief strategies against PAF-mediated pro-inflammation. We propose that plasmalogen analogs, acting as anti-PAF, may be considered as a new class of bioactive anti-inflammatory drugs. Despite of the scarcity of available experimental data, the competition between PAF and its natural plasmalogenic analogs for binding to the PAF receptor (PAF-R) can be proposed as a mechanistic model and potential therapeutic perspective against multiple inflammatory diseases (e.g., cardiovascular and neurodegenerative disorders, diabetes, cancers, and various manifestations in coronavirus infections such as COVID-19).
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Affiliation(s)
- Pu Rong
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, China
| | - Jie-Li Wang
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, China
| | - Angelina Angelova
- CNRS, Institut Galien Paris-Saclay, Université Paris-Saclay, Châtenay-Malabry, France
| | - Zakaria A. Almsherqi
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- *Correspondence: Zakaria A. Almsherqi, ; Yuru Deng,
| | - Yuru Deng
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, China
- *Correspondence: Zakaria A. Almsherqi, ; Yuru Deng,
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31
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O'Donnell VB. New appreciation for an old pathway: the Lands Cycle moves into new arenas in health and disease. Biochem Soc Trans 2022; 50:1-11. [PMID: 35225335 PMCID: PMC9022965 DOI: 10.1042/bst20210579] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 02/15/2022] [Accepted: 02/15/2022] [Indexed: 02/08/2023]
Abstract
The Lands Pathway is a fundamental biochemical process named for its discovery by William EM Lands and revealed in a series of seminal papers published in the Journal of Biological Chemistry between 1958-65. It describes the selective placement in phospholipids of acyl chains, by phospholipid acyltransferases. This pathway has formed a core component of our knowledge of phospholipid and also diglyceride metabolism in mammalian tissues for over 60 years now. Our understanding of how the Lands pathways are enzymatically mediated via large families of related gene products that display both substrate and tissue specificity has grown exponentially since. Recent studies building on this are starting to reveal key roles for the Lands pathway in specific scenarios, in particular inflammation, immunity and inflammation. This review will cover the Lands cycle from historical perspectives first, then present new information on how this important cycle forms a central regulatory node connecting fatty acyl and phospholipid metabolism and how its altered regulation may present new opportunities for therapeutic intervention in human disease.
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Affiliation(s)
- Valerie B. O'Donnell
- Systems Immunity Research Institute, School of Medicine, Cardiff University, Cardiff CF14 4SN, U.K
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32
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Abstract
The prevalence of allergic diseases such as asthma is globally increasing, posing threat to the life quality of the affected population. Genome-wide association studies (GWAS) suggest that genetic variations only account for a small proportion of immunoglobulin E (IgE)-mediated type I hypersensitivity. Recently, epigenetics has gained attention as an approach to further understand the missing heritability and underpinning mechanisms of allergic diseases. Furthermore, epigenetic regulation allows the evaluation of the interaction between an individual's genetic predisposition and their environmental exposures. This chapter summarizes several large-scale epigenome-wide association studies (EWAS) on asthma and other allergic diseases and draws a blueprint for future analysis and research direction.
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Affiliation(s)
- Yale Jiang
- Division of Pulmonary Medicine, Department of Pediatrics, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, PA, USA
- School of Medicine, Tsinghua University, Beijing, China
| | - Erick Forno
- Division of Pulmonary Medicine, Department of Pediatrics, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, PA, USA
| | - Wei Chen
- Division of Pulmonary Medicine, Department of Pediatrics, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, PA, USA.
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33
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Lin T, Zhang E, Lin Z, Peng L. Comprehensive Analysis of LPCATs Highlights the Prognostic and Immunological Values of LPCAT1/4 in Hepatocellular Carcinoma. Int J Gen Med 2021; 14:9117-9130. [PMID: 34876845 PMCID: PMC8643204 DOI: 10.2147/ijgm.s344723] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 11/18/2021] [Indexed: 12/14/2022] Open
Abstract
Background The prognosis of patients with advanced hepatocellular carcinoma (HCC) remains poor. Lipid remodeling modulators are considered promising therapeutic targets of cancers, owing to their functions of facilitating cancer cells’ adaption to the limited environment. Lysophosphatidylcholine acyltransferases (LPCATs) are enzymes regulating bio-membrane remodeling, whose roles in HCC have not been fully illuminated. Methods Multiple bioinformatic tools were applied to comprehensively evaluate the expression, genetic alterations, clinical relevance, prognostic values, DNA methylation, biological functions, and correlations with immune infiltration of LPCATs in HCC. Results We found LPCAT1 was significantly overexpressed and the most frequently altered in HCC. The high-expression of LPCAT1/4 indicated clinicopathological advancements and poor prognoses of HCC patients. Even though the global DNA methylation of LPCATs in HCC showed no significant difference with that in normal liver, the hypermethylation of numerous CpG sites of them implied worse survivals of HCC patients. Thirty LPCATs’ interactive genes were identified, which were generally membrane components and partook in phospholipid metabolism pathways. Finally, we found the expression of LPCATs was extensively positively correlated with the infiltration of various stimulatory and suppressive tumor-infiltrating immune cells (TIICs) in the tumor microenvironment. Conclusion This study addressed LPCAT1/4 were potential prognostic and immunotherapeutic biomarkers of HCC targeting bio-membrane lipid remodeling.
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Affiliation(s)
- Tong Lin
- The Fourth Clinical Medical School, Guangzhou University of Chinese Medicine, Shenzhen, People's Republic of China
| | - E Zhang
- The Fourth Clinical Medical School, Guangzhou University of Chinese Medicine, Shenzhen, People's Republic of China
| | - Zhimei Lin
- The Fourth Clinical Medical School, Guangzhou University of Chinese Medicine, Shenzhen, People's Republic of China
| | - Lisheng Peng
- Department of Science and Education, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, People's Republic of China
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34
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Valentine WJ, Yanagida K, Kawana H, Kono N, Noda NN, Aoki J, Shindou H. Update and nomenclature proposal for mammalian lysophospholipid acyltransferases which create membrane phospholipid diversity. J Biol Chem 2021; 298:101470. [PMID: 34890643 PMCID: PMC8753187 DOI: 10.1016/j.jbc.2021.101470] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 11/23/2021] [Indexed: 12/13/2022] Open
Abstract
The diversity of glycerophospholipid species in cellular membranes is immense and affects various biological functions. Glycerol-3-phosphate acyltransferases (GPATs) and lysophospholipid acyltransferases (LPLATs), in concert with phospholipase A1/2s enzymes, contribute to this diversity via selective esterification of fatty acyl chains at the sn-1 or sn-2 positions of membrane phospholipids. These enzymes are conserved across all kingdoms, and in mammals four GPATs of the 1-acylglycerol-3-phosphate O-acyltransferase (AGPAT) family and at least 14 LPLATs, either of the AGPAT or the membrane-bound O-acyltransferase (MBOAT) families, have been identified. Here we provide an overview of the biochemical and biological activities of these mammalian enzymes, including their predicted structures, involvements in human diseases, and essential physiological roles as revealed by gene-deficient mice. Recently, the nomenclature used to refer to these enzymes has generated some confusion due to the use of multiple names to refer to the same enzyme and instances of the same name being used to refer to completely different enzymes. Thus, this review proposes a more uniform LPLAT enzyme nomenclature, as well as providing an update of recent advances made in the study of LPLATs, continuing from our JBC mini review in 2009.
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Affiliation(s)
- William J Valentine
- Department of Lipid Signaling, National Center for Global Health and Medicine (NCGM), Shinjuku-ku, Tokyo 162-8655, Japan; Department of Molecular Therapy, National Institute of Neuroscience, National Center of Neurology and Psychiatry (NCNP), Kodaira, Tokyo, 187-8502, Japan
| | - Keisuke Yanagida
- Department of Lipid Signaling, National Center for Global Health and Medicine (NCGM), Shinjuku-ku, Tokyo 162-8655, Japan
| | - Hiroki Kawana
- Department of Health Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Nozomu Kono
- Department of Health Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Nobuo N Noda
- Institute of Microbial Chemistry (BIKAKEN), Microbial Chemistry Research Foundation, Tokyo 141-0021, Japan
| | - Junken Aoki
- Department of Health Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hideo Shindou
- Department of Lipid Signaling, National Center for Global Health and Medicine (NCGM), Shinjuku-ku, Tokyo 162-8655, Japan; Department of Lipid Medical Science, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan.
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35
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The structural basis for the phospholipid remodeling by lysophosphatidylcholine acyltransferase 3. Nat Commun 2021; 12:6869. [PMID: 34824256 PMCID: PMC8617236 DOI: 10.1038/s41467-021-27244-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 11/08/2021] [Indexed: 12/18/2022] Open
Abstract
As the major component of cell membranes, phosphatidylcholine (PC) is synthesized de novo in the Kennedy pathway and then undergoes extensive deacylation-reacylation remodeling via Lands' cycle. The re-acylation is catalyzed by lysophosphatidylcholine acyltransferase (LPCAT) and among the four LPCAT members in human, the LPCAT3 preferentially introduces polyunsaturated acyl onto the sn-2 position of lysophosphatidylcholine, thereby modulating the membrane fluidity and membrane protein functions therein. Combining the x-ray crystallography and the cryo-electron microscopy, we determined the structures of LPCAT3 in apo-, acyl donor-bound, and acyl receptor-bound states. A reaction chamber was revealed in the LPCAT3 structure where the lysophosphatidylcholine and arachidonoyl-CoA were positioned in two tunnels connected near to the catalytic center. A side pocket was found expanding the tunnel for the arachidonoyl CoA and holding the main body of arachidonoyl. The structural and functional analysis provides the basis for the re-acylation of lysophosphatidylcholine and the substrate preference during the reactions.
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36
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Morgan DM, Ruiter B, Smith NP, Tu AA, Monian B, Stone BE, Virk-Hundal N, Yuan Q, Shreffler WG, Love JC. Clonally expanded, GPR15-expressing pathogenic effector T H2 cells are associated with eosinophilic esophagitis. Sci Immunol 2021; 6:eabi5586. [PMID: 34389613 PMCID: PMC8686696 DOI: 10.1126/sciimmunol.abi5586] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 07/14/2021] [Indexed: 12/13/2022]
Abstract
Eosinophilic esophagitis (EoE) is an allergic disorder characterized by the recruitment of eosinophils to the esophagus, resulting in chronic inflammation. We sought to understand the cellular populations present in tissue biopsies of patients with EoE and to determine how these populations are altered between active disease and remission. To this end, we analyzed cells obtained from esophageal biopsies, duodenal biopsies, and peripheral blood of patients with EoE diagnosed with active disease or remission with single-cell RNA and T cell receptor (TCR) sequencing. Pathogenic effector TH2 (peTH2) cells present in the esophageal biopsies of patients with active disease expressed distinct gene signatures associated with the synthesis of eicosanoids. The esophageal tissue-resident peTH2 population also exhibited clonal expansion, suggesting antigen-specific activation. Peripheral CRTH2+CD161- and CRTH2+CD161+ memory CD4+ T cells were enriched for either a conventional TH2 phenotype or a peTH2 phenotype, respectively. These cells also exhibited substantial clonal expansion and convergence of TCR sequences, suggesting that they are expanded in response to a defined set of antigens. The esophagus-homing receptor GPR15 was up-regulated by peripheral peTH2 clonotypes that were also detected in the esophagus. Finally, GPR15+ peTH2 cells were enriched among milk-reactive CD4+ T cells in patients with milk-triggered disease, suggesting that these cells are an expanded, food antigen-specific population with enhanced esophagus homing potential.
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Affiliation(s)
- Duncan M Morgan
- Koch Institute for Integrative Cancer Research, MIT, Cambridge, MA, USA.
- Department of Chemical Engineering, MIT, Cambridge, MA, USA
| | - Bert Ruiter
- Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| | - Neal P Smith
- Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Boston, MA, USA
| | - Ang A Tu
- Koch Institute for Integrative Cancer Research, MIT, Cambridge, MA, USA
- Department of Biological Engineering, MIT, Cambridge, MA, USA
- Immunitas Therapeutics Inc., Cambridge, MA, USA
| | - Brinda Monian
- Koch Institute for Integrative Cancer Research, MIT, Cambridge, MA, USA
- Department of Chemical Engineering, MIT, Cambridge, MA, USA
| | - Brandon E Stone
- Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Boston, MA, USA
| | | | - Qian Yuan
- Food Allergy Center, Massachusetts General Hospital, Boston, MA, USA
| | - Wayne G Shreffler
- Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Boston, MA, USA.
- Harvard Medical School, Boston, MA, USA
- Food Allergy Center, Massachusetts General Hospital, Boston, MA, USA
| | - J Christopher Love
- Koch Institute for Integrative Cancer Research, MIT, Cambridge, MA, USA.
- Department of Chemical Engineering, MIT, Cambridge, MA, USA
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Ragon Institute of MGH, MIT and Harvard, Cambridge, MA, USA
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37
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Hamano F, Matoba K, Hashidate-Yoshida T, Suzuki T, Miura K, Hishikawa D, Harayama T, Yuki K, Kita Y, Noda NN, Shimizu T, Shindou H. Mutagenesis and homology modeling reveal a predicted pocket of lysophosphatidylcholine acyltransferase 2 to catch Acyl-CoA. FASEB J 2021; 35:e21501. [PMID: 33956375 DOI: 10.1096/fj.202002591r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 02/12/2021] [Accepted: 02/18/2021] [Indexed: 11/11/2022]
Abstract
Platelet-activating factor (PAF) is a potent proinflammatory phospholipid mediator that elicits various cellular functions and promotes several pathological events, including anaphylaxis and neuropathic pain. PAF is biosynthesized by two types of lyso-PAF acetyltransferases: lysophosphatidylcholine acyltransferase 1 (LPCAT1) and LPCAT2, which are constitutive and inducible forms of lyso-PAF acetyltransferase, respectively. Because LPCAT2 mainly produces PAF under inflammatory stimuli, understanding the structure of LPCAT2 is important for developing specific drugs against PAF-related inflammatory diseases. Although the structure of LPCAT2 has not been determined, the crystal structure was reported for Thermotoga maritima PlsC, an enzyme in the same gene family as LPCAT2. Here, we identified residues in mouse LPCAT2 essential for its enzymatic activity and a potential acyl-coenzyme A (CoA)-binding pocket, based on homology modeling of mouse LPCAT2 with PlsC. We also found that Ala115 of mouse LPCAT2 was important for acyl-CoA selectivity. In conclusion, these results predict the three-dimensional (3D) structure of mouse LPCAT2. Our findings have implications for the future development of new drugs against PAF-related diseases.
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Affiliation(s)
- Fumie Hamano
- Department of Lipid Signaling, National Center for Global Health and Medicine, Tokyo, Japan.,Life Sciences Core Facility, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Kazuaki Matoba
- Institute of Microbial Chemistry (BIKAKEN), Tokyo, Japan
| | | | - Tomoyuki Suzuki
- Department of Lipid Signaling, National Center for Global Health and Medicine, Tokyo, Japan.,Department of Respiratory Medicine, The University of Tokyo, Tokyo, Japan
| | - Kiyotake Miura
- Department of Biochemistry and Molecular Biology, The University of Tokyo, Tokyo, Japan
| | - Daisuke Hishikawa
- Department of Lipid Signaling, National Center for Global Health and Medicine, Tokyo, Japan.,Institute of Research, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Takeshi Harayama
- Department of Lipid Signaling, National Center for Global Health and Medicine, Tokyo, Japan.,Institut de Pharmacologie Moléculaire et Cellulaire, CNRS, Université Côte d'Azur, Valbonne, France
| | - Koichi Yuki
- Department of Biochemistry and Molecular Biology, The University of Tokyo, Tokyo, Japan.,Department of Anesthesiology, Critical Care and Pain Medicine, Boston Children's Hospital, Boston, MA, USA.,Department of Anesthesia and Immunology, Harvard Medical School, Boston, MA, USA
| | - Yoshihiro Kita
- Life Sciences Core Facility, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Nobuo N Noda
- Institute of Microbial Chemistry (BIKAKEN), Tokyo, Japan
| | - Takao Shimizu
- Department of Lipid Signaling, National Center for Global Health and Medicine, Tokyo, Japan.,Institute of Microbial Chemistry (BIKAKEN), Tokyo, Japan
| | - Hideo Shindou
- Department of Lipid Signaling, National Center for Global Health and Medicine, Tokyo, Japan.,Department of Medical Lipid Science, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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38
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Saito RF, Rangel MC, Halman JR, Chandler M, de Sousa Andrade LN, Odete-Bustos S, Furuya TK, Carrasco AGM, Chaves-Filho AB, Yoshinaga MY, Miyamoto S, Afonin KA, Chammas R. Simultaneous silencing of lysophosphatidylcholine acyltransferases 1-4 by nucleic acid nanoparticles (NANPs) improves radiation response of melanoma cells. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2021; 36:102418. [PMID: 34171470 DOI: 10.1016/j.nano.2021.102418] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Revised: 05/17/2021] [Accepted: 05/25/2021] [Indexed: 12/19/2022]
Abstract
Radiation induces the generation of platelet-activating factor receptor (PAF-R) ligands, including PAF and oxidized phospholipids. Alternatively, PAF is also synthesized by the biosynthetic enzymes lysophosphatidylcholine acyltransferases (LPCATs) which are expressed by tumor cells including melanoma. The activation of PAF-R by PAF and oxidized lipids triggers a survival response protecting tumor cells from radiation-induced cell death, suggesting the involvement of the PAF/PAF-R axis in radioresistance. Here, we investigated the role of LPCATs in the melanoma cell radiotherapy response. LPCAT is a family of four enzymes, LPCAT1-4, and modular nucleic acid nanoparticles (NANPs) allowed for the simultaneous silencing of all four LPCATs. We found that the in vitro simultaneous silencing of all four LPCAT transcripts by NANPs enhanced the therapeutic effects of radiation in melanoma cells by increasing cell death, reducing long-term cell survival, and activating apoptosis. Thus, we propose that NANPs are an effective strategy for improving radiotherapy efficacy in melanomas.
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Affiliation(s)
- Renata F Saito
- Centro de Investigação Translacional em Oncologia (LIM24), Departamento de Radiologia e Oncologia, Faculdade de Medicina da Universidade de São Paulo and Instituto do Câncer do Estado de São Paulo, São Paulo, SP, Brazil.
| | - Maria Cristina Rangel
- Centro de Investigação Translacional em Oncologia (LIM24), Departamento de Radiologia e Oncologia, Faculdade de Medicina da Universidade de São Paulo and Instituto do Câncer do Estado de São Paulo, São Paulo, SP, Brazil.
| | - Justin R Halman
- Nanoscale Science Program, Department of Chemistry, University of North Carolina at Charlotte, Charlotte, NC, USA.
| | - Morgan Chandler
- Nanoscale Science Program, Department of Chemistry, University of North Carolina at Charlotte, Charlotte, NC, USA.
| | - Luciana Nogueira de Sousa Andrade
- Centro de Investigação Translacional em Oncologia (LIM24), Departamento de Radiologia e Oncologia, Faculdade de Medicina da Universidade de São Paulo and Instituto do Câncer do Estado de São Paulo, São Paulo, SP, Brazil.
| | - Silvina Odete-Bustos
- Centro de Investigação Translacional em Oncologia (LIM24), Departamento de Radiologia e Oncologia, Faculdade de Medicina da Universidade de São Paulo and Instituto do Câncer do Estado de São Paulo, São Paulo, SP, Brazil.
| | - Tatiane Katsue Furuya
- Centro de Investigação Translacional em Oncologia (LIM24), Departamento de Radiologia e Oncologia, Faculdade de Medicina da Universidade de São Paulo and Instituto do Câncer do Estado de São Paulo, São Paulo, SP, Brazil.
| | - Alexis Germán Murillo Carrasco
- Centro de Investigação Translacional em Oncologia (LIM24), Departamento de Radiologia e Oncologia, Faculdade de Medicina da Universidade de São Paulo and Instituto do Câncer do Estado de São Paulo, São Paulo, SP, Brazil.
| | - Adriano B Chaves-Filho
- Laboratório de Lipídeos Modificados, Departamento de Bioquímica, Universidade de São Paulo, São Paulo, Brazil.
| | - Marcos Y Yoshinaga
- Laboratório de Lipídeos Modificados, Departamento de Bioquímica, Universidade de São Paulo, São Paulo, Brazil.
| | - Sayuri Miyamoto
- Laboratório de Lipídeos Modificados, Departamento de Bioquímica, Universidade de São Paulo, São Paulo, Brazil.
| | - Kirill A Afonin
- Nanoscale Science Program, Department of Chemistry, University of North Carolina at Charlotte, Charlotte, NC, USA.
| | - Roger Chammas
- Centro de Investigação Translacional em Oncologia (LIM24), Departamento de Radiologia e Oncologia, Faculdade de Medicina da Universidade de São Paulo and Instituto do Câncer do Estado de São Paulo, São Paulo, SP, Brazil; Nanoscale Science Program, Department of Chemistry, University of North Carolina at Charlotte, Charlotte, NC, USA.
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Dalmaso B, da Silva-Junior IA, Fragel-Madeira L, Jancar S, Del Debbio CB. Platelet activating factor in the eye: Physiological roles, diseases and future perspectives. Prostaglandins Other Lipid Mediat 2021; 153:106522. [PMID: 33358892 DOI: 10.1016/j.prostaglandins.2020.106522] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 12/03/2020] [Accepted: 12/18/2020] [Indexed: 01/09/2023]
Abstract
Platelet Activating Factor (PAF) is a known phospholipid mediator of inflammation. Since its first description in 1972, it has emerged as a key regulator of vital cellular signaling functions, as proliferation, cell adhesion, and apoptosis. Evidence suggests that interactions between PAF and its receptor (PAFR) play a critical role in nervous system tissues, including the retina. The retina is a very important constituent of the visual system, along with the cornea, sclera, choroid, iris, and ciliary body, that acts synergistically to provide vision and to maintain optical homeostasis. There is evidence that PAF may regulate a wide range of physiological functions in the visual system tissues, such as eye development, inflammation, epithelial wound healing, and synapsis. Due to their multiple functions, PAF and PAFR also have important pathological and clinical implications in ocular disorders such as Choroidal Neovascularization (CNV), Age Macular Degeneration, (AMD), Diabetic Retinopathy (DR), transplant responses, and pharmacological interactions. Studies with PAFR antagonists have shown promising results such as inhibition of neovascularization and chloroquine-induced retinopathies, as well as reducing inflammation and retinal cell death. Due to the importance of PAFR signaling in the visual system and ophthalmology research, this review aims to provide a general overview of current and future perspectives about PAF in eye biology.
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Affiliation(s)
- Barbara Dalmaso
- Department of Cell and Developmental Biology, Biomedical Sciences Institute, University of Sao Paulo, São Paulo, Brazil
| | | | - Lucianne Fragel-Madeira
- Department of Neurobiology, Institute of Biology, Fluminense Federal University, Rio de Janeiro, Brazil
| | - Sonia Jancar
- Department of Immunology, Biomedical Sciences Institute, University of Sao Paulo, São Paulo, Brazil
| | - Carolina Beltrame Del Debbio
- Department of Cell and Developmental Biology, Biomedical Sciences Institute, University of Sao Paulo, São Paulo, Brazil.
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40
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Madzime M, Rossouw TM, Theron AJ, Anderson R, Steel HC. Interactions of HIV and Antiretroviral Therapy With Neutrophils and Platelets. Front Immunol 2021; 12:634386. [PMID: 33777022 PMCID: PMC7994251 DOI: 10.3389/fimmu.2021.634386] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 02/18/2021] [Indexed: 12/16/2022] Open
Abstract
Neutrophils are important components of the innate immune system that mediate pathogen defense by multiple processes including phagocytosis, release of proteolytic enzymes, production of reactive oxygen species, and neutrophil extracellular trap formation. Abnormalities of neutrophil count and function have been described in the setting of HIV infection, with the majority of antiretroviral agents (ARVs), excluding zidovudine, having been reported to correct neutropenia. Questions still remain, however, about their impact on neutrophil function, particularly the possibility of persistent neutrophil activation, which could predispose people living with HIV to chronic inflammatory disorders, even in the presence of virally-suppressive treatment. In this context, the effects of protease inhibitors and integrase strand transfer inhibitors, in particular, on neutrophil function remain poorly understood and deserve further study. Besides mediating hemostatic functions, platelets are increasingly recognized as critical role players in the immune response against infection. In the setting of HIV, these cells have been found to harbor the virus, even in the presence of antiretroviral therapy (ART) potentially promoting viral dissemination. While HIV-infected individuals often present with thrombocytopenia, they have also been reported to have increased platelet activation, as measured by an upregulation of expression of CD62P (P-selectin), CD40 ligand, glycoprotein IV, and RANTES. Despite ART-mediated viral suppression, HIV-infected individuals reportedly have sustained platelet activation and dysfunction. This, in turn, contributes to persistent immune activation and an inflammatory vascular environment, seemingly involving neutrophil-platelet-endothelium interactions that increase the risk for development of comorbidities such as cardiovascular disease (CVD) that has become the leading cause of morbidity and mortality in HIV-infected individuals on treatment, clearly underscoring the importance of unraveling the possible etiologic roles of ARVs. In this context, abacavir and ritonavir-boosted lopinavir and darunavir have all been linked to an increased risk of CVD. This narrative review is therefore focused primarily on the role of neutrophils and platelets in HIV transmission and disease, as well as on the effect of HIV and the most common ARVs on the numbers and functions of these cells, including neutrophil-platelet-endothelial interactions.
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Affiliation(s)
- Morris Madzime
- Department of Immunology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
| | - Theresa M Rossouw
- Department of Immunology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
| | - Annette J Theron
- Department of Immunology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
| | - Ronald Anderson
- Department of Immunology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
| | - Helen C Steel
- Department of Immunology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
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41
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Matsushita Y, Nakagawa H, Koike K. Lipid Metabolism in Oncology: Why It Matters, How to Research, and How to Treat. Cancers (Basel) 2021; 13:474. [PMID: 33530546 PMCID: PMC7865757 DOI: 10.3390/cancers13030474] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 01/20/2021] [Accepted: 01/22/2021] [Indexed: 12/11/2022] Open
Abstract
Lipids in our body, which are mainly composed of fatty acids, triacylglycerides, sphingolipids, phospholipids, and cholesterol, play important roles at the cellular level. In addition to being energy sources and structural components of biological membranes, several types of lipids serve as signaling molecules or secondary messengers. Metabolic reprogramming has been recognized as a hallmark of cancer, but changes in lipid metabolism in cancer have received less attention compared to glucose or glutamine metabolism. However, recent innovations in mass spectrometry- and chromatography-based lipidomics technologies have increased our understanding of the role of lipids in cancer. Changes in lipid metabolism, so-called "lipid metabolic reprogramming", can affect cellular functions including the cell cycle, proliferation, growth, and differentiation, leading to carcinogenesis. Moreover, interactions between cancer cells and adjacent immune cells through altered lipid metabolism are known to support tumor growth and progression. Characterization of cancer-specific lipid metabolism can be used to identify novel metabolic targets for cancer treatment, and indeed, several clinical trials are currently underway. Thus, we discuss the latest findings on the roles of lipid metabolism in cancer biology and introduce current advances in lipidomics technologies, focusing on their applications in cancer research.
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Affiliation(s)
| | - Hayato Nakagawa
- Department of Gastroenterology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan; (Y.M.); (K.K.)
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Fragopoulou E, Detopoulou P, Alepoudea E, Nomikos T, Kalogeropoulos N, Antonopoulou S. Associations between red blood cells fatty acids, desaturases indices and metabolism of platelet activating factor in healthy volunteers. Prostaglandins Leukot Essent Fatty Acids 2021; 164:102234. [PMID: 33373961 DOI: 10.1016/j.plefa.2020.102234] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 11/18/2020] [Accepted: 12/15/2020] [Indexed: 11/15/2022]
Abstract
INTRODUCTION Platelet-activating-factor is an inflammatory lipid mediator. Key enzymes of its biosynthesis are CDP-choline:1-alkyl-2-acetyl-sn-glycerol-cholinephosphotransferase (PAF-CPT) and acetyl-CoA:lyso-PAF-acetyltransferases (Lyso-PAF-AT) while PAF-AH/Lp-PLA2 degrade PAF. The interplay between PAF and fatty acids metabolism was explored. MATERIAL AND METHODS In a healthy population, PAF levels, its metabolic enzymes activity and RBC fatty acids were measured while desaturases indices (D) were estimated. A principal component analysis was also applied to assess patterns of RBC fatty acids. RESULTS SFA were related to increased PAF biosynthesis and decreased Lp-PLA2 only in women. MUFA were inversely associated with PAF biosynthesis and positively with Lp-PLA2. Omega-6 fatty acids were positively correlated only with PAF-CPT while no significant correlations were observed with n3 fatty acids. D6 index was positively related with PAF biosynthetic enzymes and inversely with Lp-PLA2 while D9 correlated positively with Lp-PLA2. The pattern of high MUFA and low n6 was associated with reduced PAF biosynthesis and/or increased catabolism in both sexes. CONCLUSION The role of fatty acids in amplifying or reducing inflammation seems to be also reflected in PAF metabolism.
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Affiliation(s)
- E Fragopoulou
- Department of Nutrition and Dietetics, School of Health Science and Education, Harokopio University, 70 El. Venizelou Street, 17671, Athens, Greece
| | - P Detopoulou
- Department of Nutrition and Dietetics, School of Health Science and Education, Harokopio University, 70 El. Venizelou Street, 17671, Athens, Greece
| | - E Alepoudea
- Department of Nutrition and Dietetics, School of Health Science and Education, Harokopio University, 70 El. Venizelou Street, 17671, Athens, Greece
| | - T Nomikos
- Department of Nutrition and Dietetics, School of Health Science and Education, Harokopio University, 70 El. Venizelou Street, 17671, Athens, Greece
| | - N Kalogeropoulos
- Department of Nutrition and Dietetics, School of Health Science and Education, Harokopio University, 70 El. Venizelou Street, 17671, Athens, Greece
| | - S Antonopoulou
- Department of Nutrition and Dietetics, School of Health Science and Education, Harokopio University, 70 El. Venizelou Street, 17671, Athens, Greece.
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43
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Watanabe H, Miyake K, Matsuoka T, Kojima R, Sakurai D, Masuyama K, Yamagata Z. LPCAT2 Methylation, a Novel Biomarker for the Severity of Cedar Pollen Allergic Rhinitis in Japan. Am J Rhinol Allergy 2020; 35:631-639. [PMID: 33356413 DOI: 10.1177/1945892420983646] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND Recently, the role of the epigenome in allergies has been receiving increasing attention. Although several genes that are methylated in relation to serum immunoglobulin E (IgE) concentration have been reported by epigenome-wide association studies, little is known about the DNA methylation sites associated with the symptoms and severity of cedar pollinosis (CP). OBJECTIVE Our aim was to analyze the association between DNA methylation and the symptoms and severity of CP in peripheral blood mononuclear cells (PBMCs) and nasal mucosa scraping cells (NMSCs). METHODS We recruited 70 participants during the cedar pollen dispersal season. IgE levels were measured by a fluorescence enzyme immunoassay. We analyzed DNA methylation of acyl-CoA thioesterase 7 (ACOT7), mucin 4 (MUC4), schlafen 12 (SLFN12), lysophosphatidylcholine acyltransferase 2 (LPCAT2), and interleukin-4 (IL4) in PBMCs and NMSCs using bisulfite next-generation sequencing; the correlation of DNA methylation with non-specific IgE and cedar pollen-specific IgE levels in peripheral blood samples was also investigated. Symptom severity and DNA methylation were investigated in 15 untreated CP patients. RESULTS Non-specific IgE levels showed a significant negative correlation with average IL4 methylation in PBMCs (r = -0.46, P < 0.0001) but not with methylation of ACOT7, MUC4, SLFN12, and LPCAT2. Cedar pollen-specific IgE levels showed a significant negative correlation with average IL4 and MUC4 methylation in PBMCs (r = -0.31, P = 0.01 and r = -0.241, P = 0.046, respectively) but not with methylation of ACOT7, SLFN12, and LPCAT2. The methylation of some genes in NMSCs was not significantly correlated with IgE levels. The mean methylation of LPCAT2 in NMSCs showed a decreasing trend with increasing severity of CP (P = 0.027). CONCLUSION LPCAT2 methylation in NMSCs may reflect the severity of CP and could be used as a novel biomarker to identify suitable treatment options for CP.
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Affiliation(s)
- Hiroyuki Watanabe
- Department of Otorhinolaryngology, Head and Neck Surgery, Faculty of Medicine, Graduate Faculty of Interdisciplinary Research, University of Yamanashi, Kofu, Japan.,Department of Health Sciences, Graduate School of Interdisciplinary Research, University of Yamanashi, Kofu, Japan
| | - Kunio Miyake
- Department of Health Sciences, Graduate School of Interdisciplinary Research, University of Yamanashi, Kofu, Japan
| | - Tomokazu Matsuoka
- Department of Otorhinolaryngology, Head and Neck Surgery, Faculty of Medicine, Graduate Faculty of Interdisciplinary Research, University of Yamanashi, Kofu, Japan
| | - Reiji Kojima
- Department of Health Sciences, Graduate School of Interdisciplinary Research, University of Yamanashi, Kofu, Japan
| | - Daiju Sakurai
- Department of Otorhinolaryngology, Head and Neck Surgery, Faculty of Medicine, Graduate Faculty of Interdisciplinary Research, University of Yamanashi, Kofu, Japan
| | - Keisuke Masuyama
- Department of Otorhinolaryngology, Head and Neck Surgery, Faculty of Medicine, Graduate Faculty of Interdisciplinary Research, University of Yamanashi, Kofu, Japan.,Department of Otorhinolaryngology, Suwa Central Hospital, Chino, Japan
| | - Zentaro Yamagata
- Department of Health Sciences, Graduate School of Interdisciplinary Research, University of Yamanashi, Kofu, Japan
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Marathe GK, Chaithra VH, Ke LY, Chen CH. Effect of acyl and alkyl analogs of platelet-activating factor on inflammatory signaling. Prostaglandins Other Lipid Mediat 2020; 151:106478. [PMID: 32711129 DOI: 10.1016/j.prostaglandins.2020.106478] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 07/20/2020] [Accepted: 07/20/2020] [Indexed: 01/11/2023]
Abstract
Platelet-activating factor (PAF), a bioactive ether phospholipid with significant pro-inflammatory properties, was identified almost half a century ago. Despite extensive study of this autocoid, therapeutic strategies for targeting its signaling components have not been successful, including the recent clinical trials with darapladib, a drug that targets plasma PAF-acetylhydrolase (PAF-AH). We recently provided experimental evidence that the previously unrecognized acyl analog of PAF, which is concomitantly produced along with PAF during biosynthesis, dampens PAF signaling by acting both as a sacrificial substrate for PAF-AH and probably as an endogenous PAF-receptor antagonist/partial agonist. If this is the scenario in vivo, PAF-AH needs to catalyze the selective hydrolysis of alkyl-PAF and not acyl-PAF. Accordingly, different approaches are needed for treating inflammatory diseases in which PAF signaling is implicated. The interplay between acyl-PAF, alkyl-PAF, PAF-AH, and PAF-R is complex, and the outcome of this interplay has not been previously appreciated. In this review, we discuss this interaction based on our recent findings. It is very likely that the relative abundance of acyl and alkyl-PAF and their interactions with PAF-R in the presence of their hydrolyzing enzyme PAF-AH may exert a modulatory effect on PAF signaling during inflammation.
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Affiliation(s)
- Gopal Kedihithlu Marathe
- Department of Studies in Biochemistry, University of Mysore, Manasagangothri, Mysuru, 570006, Karnataka, India; Department of Studies in Molecular Biology, University of Mysore, Manasagangothri, Mysuru, 570006, Karnataka, India.
| | | | - Liang-Yin Ke
- College of Health Sciences, Kaohsiung Medical University, Vascular and Medicinal Research, Kaohsiung, 80708, Taiwan.
| | - Chu-Huang Chen
- Vascular and Medicinal Research, Texas Heart Institute, Houston, Texas 77030, USA.
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45
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Emerging roles of lysophospholipids in health and disease. Prog Lipid Res 2020; 80:101068. [PMID: 33068601 DOI: 10.1016/j.plipres.2020.101068] [Citation(s) in RCA: 140] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 10/09/2020] [Accepted: 10/11/2020] [Indexed: 12/22/2022]
Abstract
Lipids are abundant and play essential roles in human health and disease. The main functions of lipids are building blocks for membrane biogenesis. However, lipids are also metabolized to produce signaling molecules. Here, we discuss the emerging roles of circulating lysophospholipids. These lysophospholipids consist of lysoglycerophospholipids and lysosphingolipids. They are both present in cells at low concentration, but their concentrations in extracellular fluids are significantly higher. The biological functions of some of these lysophospholipids have been recently revealed. Remarkably, some of the lysophospholipids play pivotal signaling roles as well as being precursors for membrane biogenesis. Revealing how circulating lysophospholipids are produced, released, transported, and utilized in multi-organ systems is critical to understand their functions. The discovery of enzymes, carriers, transporters, and membrane receptors for these lysophospholipids has shed light on their physiological significance. In this review, we summarize the biological roles of these lysophospholipids via discussing about the proteins regulating their functions. We also discuss about their potential impacts to human health and diseases.
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Mizuno H, Kihara Y. Druggable Lipid GPCRs: Past, Present, and Prospects. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1274:223-258. [PMID: 32894513 DOI: 10.1007/978-3-030-50621-6_10] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
G protein-coupled receptors (GPCRs) have seven transmembrane spanning domains and comprise the largest superfamily with ~800 receptors in humans. GPCRs are attractive targets for drug discovery because they transduce intracellular signaling in response to endogenous ligands via heterotrimeric G proteins or arrestins, resulting in a wide variety of physiological and pathophysiological responses. The endogenous ligands for GPCRs are highly chemically diverse and include ions, biogenic amines, nucleotides, peptides, and lipids. In this review, we follow the KonMari method to better understand druggable lipid GPCRs. First, we have a comprehensive tidying up of lipid GPCRs including receptors for prostanoids, leukotrienes, specialized pro-resolving mediators (SPMs), lysophospholipids, sphingosine 1-phosphate (S1P), cannabinoids, platelet-activating factor (PAF), free fatty acids (FFAs), and sterols. This tidying up consolidates 46 lipid GPCRs and declutters several perplexing lipid GPCRs. Then, we further tidy up the lipid GPCR-directed drugs from the literature and databases, which identified 24 clinical drugs targeting 16 unique lipid GPCRs available in the market and 44 drugs under evaluation in more than 100 clinical trials as of 2019. Finally, we introduce drug designs for GPCRs that spark joy, such as positive or negative allosteric modulators (PAM or NAM), biased agonism, functional antagonism like fingolimod, and monoclonal antibodies (MAbs). These strategic drug designs may increase the efficacy and specificity of drugs and reduce side effects. Technological advances will help to discover more endogenous lipid ligands from the vast number of remaining orphan GPCRs and will also lead to the development novel lipid GPCR drugs to treat various diseases.
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Affiliation(s)
| | - Yasuyuki Kihara
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA.
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47
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Shimamoto-Mitsuyama C, Nakaya A, Esaki K, Balan S, Iwayama Y, Ohnishi T, Maekawa M, Toyota T, Dean B, Yoshikawa T. Lipid Pathology of the Corpus Callosum in Schizophrenia and the Potential Role of Abnormal Gene Regulatory Networks with Reduced Microglial Marker Expression. Cereb Cortex 2020; 31:448-462. [PMID: 32924060 PMCID: PMC7727339 DOI: 10.1093/cercor/bhaa236] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 07/29/2020] [Accepted: 07/30/2020] [Indexed: 12/13/2022] Open
Abstract
Structural changes in the corpus callosum have been reported in schizophrenia; however, the underlying molecular mechanism remains unclear. As the corpus callosum is high in lipid content, we analyzed the lipid contents of the corpora callosa from 15 patients with schizophrenia and 15 age- and sex-matched controls using liquid chromatography coupled to tandem mass spectrometry and identified lipid combinations associated with schizophrenia. Real-time quantitative polymerase chain reaction analyses using extended samples (schizophrenia, n = 95; control, n = 91) showed low expression levels of lipid metabolism-related genes and their potential upstream transcription factors in schizophrenia. Subsequent pathway analysis identified a gene regulatory network where nuclear factor of activated T cells 2 (NFATC2) is placed most upstream. We also observed low gene expression levels of microglial markers, inflammatory cytokines, and colony-stimulating factor 1 receptor (CSF1R), which is known to regulate the density of microglia, in the corpus callosum in schizophrenia. The interactions between CSF1R and several genes in the presently identified gene network originating from NFATC2 have been reported. Collectively, this study provides evidence regarding lipid abnormalities in the corpora callosa of patients with schizophrenia and proposes the potential role of impaired “NFATC2-relevant gene network-microglial axis” as its underlying mechanism.
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Affiliation(s)
| | - Akihiro Nakaya
- Laboratory of Molecular Psychiatry, RIKEN Center for Brain Science, Wako, Saitama, Japan.,Laboratory of Genome Data Science, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba, Japan
| | - Kayoko Esaki
- Laboratory of Molecular Psychiatry, RIKEN Center for Brain Science, Wako, Saitama, Japan
| | - Shabeesh Balan
- Laboratory of Molecular Psychiatry, RIKEN Center for Brain Science, Wako, Saitama, Japan
| | - Yoshimi Iwayama
- Laboratory of Molecular Psychiatry, RIKEN Center for Brain Science, Wako, Saitama, Japan.,Support Unit for Bio-Material Analysis, Research Resources Division, RIKEN Center for Brain Science, Wako, Saitama, Japan
| | - Tetsuo Ohnishi
- Laboratory of Molecular Psychiatry, RIKEN Center for Brain Science, Wako, Saitama, Japan
| | - Motoko Maekawa
- Laboratory of Molecular Psychiatry, RIKEN Center for Brain Science, Wako, Saitama, Japan
| | - Tomoko Toyota
- Laboratory of Molecular Psychiatry, RIKEN Center for Brain Science, Wako, Saitama, Japan
| | - Brian Dean
- The Florey Institute of Neuroscience and Mental Health, Howard Florey Laboratories, The University of Melbourne, Parkville, Victoria, Australia.,The Centre for Mental Health, Swinburne University, Hawthorn, Victoria, Australia
| | - Takeo Yoshikawa
- Laboratory of Molecular Psychiatry, RIKEN Center for Brain Science, Wako, Saitama, Japan
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Lysophosphatidylcholine acyltransferase 2 (LPCAT2) co-localises with TLR4 and regulates macrophage inflammatory gene expression in response to LPS. Sci Rep 2020; 10:10355. [PMID: 32587324 PMCID: PMC7316826 DOI: 10.1038/s41598-020-67000-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 05/06/2020] [Indexed: 12/24/2022] Open
Abstract
Despite extensive investigations, an effective treatment for sepsis remains elusive and a better understanding of the inflammatory response to infection is required to identify potential new targets for therapy. In this study we have used RNAi technology to show, for the first time, that the inducible lysophosphatidylcholine acyltransferase 2 (LPCAT2) plays a key role in macrophage inflammatory gene expression in response to stimulation with bacterial ligands. Using siRNA- or shRNA-mediated knockdown, we demonstrate that, in contrast to the constitutive LPCAT1, LPCAT2 is required for macrophage cytokine gene expression and release in response to TLR4 and TLR2 ligand stimulation but not for TLR-independent stimuli. In addition, cells transfected to overexpress LPCAT2 exhibited increased expression of inflammatory genes in response to LPS and other bacterial ligands. Furthermore, we have used immunoprecipitation and Western blotting to show that in response to LPS, LPCAT2, but not LPCAT1, rapidly associates with TLR4 and translocates to membrane lipid raft domains. Our data thus suggest a novel mechanism for the regulation of inflammatory gene expression in response to bacterial stimuli and highlight LPCAT2 as a potential therapeutic target for development of anti-inflammatory and anti-sepsis therapies.
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49
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Valentine WJ, Hashidate-Yoshida T, Yamamoto S, Shindou H. Biosynthetic Enzymes of Membrane Glycerophospholipid Diversity as Therapeutic Targets for Drug Development. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1274:5-27. [PMID: 32894505 DOI: 10.1007/978-3-030-50621-6_2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Biophysical properties of membranes are dependent on their glycerophospholipid compositions. Lysophospholipid acyltransferases (LPLATs) selectively incorporate fatty chains into lysophospholipids to affect the fatty acid composition of membrane glycerophospholipids. Lysophosphatidic acid acyltransferases (LPAATs) of the 1-acylglycerol-3-phosphate O-acyltransferase (AGPAT) family incorporate fatty chains into phosphatidic acid during the de novo glycerophospholipid synthesis in the Kennedy pathway. Other LPLATs of both the AGPAT and the membrane bound O-acyltransferase (MBOAT) families further modify the fatty chain compositions of membrane glycerophospholipids in the remodeling pathway known as the Lands' cycle. The LPLATs functioning in these pathways possess unique characteristics in terms of their biochemical activities, regulation of expressions, and functions in various biological contexts. Essential physiological functions for LPLATs have been revealed in studies using gene-deficient mice, and important roles for several enzymes are also indicated in human diseases where their mutation or dysregulation causes or contributes to the pathological condition. Now several LPLATs are emerging as attractive therapeutic targets, and further understanding of the mechanisms underlying their physiological and pathological roles will aid in the development of novel therapies to treat several diseases that involve altered glycerophospholipid metabolism.
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Affiliation(s)
- William J Valentine
- Department of Lipid Signaling, National Center for Global Health and Medicine, Tokyo, Japan. .,Department of Molecular Therapy, National Center of Neurology and Psychiatry, Tokyo, Japan.
| | | | - Shota Yamamoto
- Department of Lipid Signaling, National Center for Global Health and Medicine, Tokyo, Japan
| | - Hideo Shindou
- Department of Lipid Signaling, National Center for Global Health and Medicine, Tokyo, Japan. .,Department of Lipid Science, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan. .,Japan Agency for Medical Research and Development, Tokyo, Japan.
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Ménégaut L, Jalil A, Thomas C, Masson D. Macrophage fatty acid metabolism and atherosclerosis: The rise of PUFAs. Atherosclerosis 2019; 291:52-61. [PMID: 31693943 DOI: 10.1016/j.atherosclerosis.2019.10.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2019] [Revised: 09/26/2019] [Accepted: 10/09/2019] [Indexed: 01/24/2023]
Abstract
Among the pathways involved in the regulation of macrophage functions, the metabolism of unsaturated fatty acids is central. Indeed, unsaturated fatty acids act as precursors of bioactive molecules such as prostaglandins, leukotrienes, resolvins and related compounds. As components of phospholipids, they have a pivotal role in cell biology by regulating membrane fluidity and membrane-associated cellular processes. Finally, polyunsaturated fatty acids (PUFAs) are also endowed with ligand properties for numerous membrane or nuclear receptors. Although myeloid cells are dependent on the metabolic context for the uptake of essential FAs, recent studies showed that these cells autonomously handle the synthesis of n-3 and n-6 long chain PUFAs such as arachidonic acid and eicosapentaenoic acid. Moreover, targeting PUFA metabolism in macrophages influences pathological processes, including atherosclerosis, by modulating macrophage functions. Omics evidence also supports a role for macrophage PUFA metabolism in the development of cardiometabolic diseases in humans. Currently, there is a renewed interest in the role of n-3/n-6 PUFAs and their oxygenated derivatives in the onset of atherosclerosis and plaque rupture. Purified n-3 FA supplementation appears as a potential strategy in the treatment and prevention of cardiovascular diseases. In this context, the ability of immune cells to handle and to synthesize very long chain PUFA must absolutely be integrated and better understood.
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Affiliation(s)
- Louise Ménégaut
- Univ. Bourgogne Franche-Comté, LNC UMR1231, F-21000, Dijon, France; FCS Bourgogne-Franche Comté, LipSTIC LabEx, F-21000, Dijon, France
| | - Antoine Jalil
- Univ. Bourgogne Franche-Comté, LNC UMR1231, F-21000, Dijon, France; FCS Bourgogne-Franche Comté, LipSTIC LabEx, F-21000, Dijon, France
| | - Charles Thomas
- Univ. Bourgogne Franche-Comté, LNC UMR1231, F-21000, Dijon, France; FCS Bourgogne-Franche Comté, LipSTIC LabEx, F-21000, Dijon, France
| | - David Masson
- Univ. Bourgogne Franche-Comté, LNC UMR1231, F-21000, Dijon, France; FCS Bourgogne-Franche Comté, LipSTIC LabEx, F-21000, Dijon, France.
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