1
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Poursharifi P, Schmitt C, Chenier I, Leung YH, Oppong AK, Bai Y, Klein LL, Al-Mass A, Lussier R, Abu-Farha M, Abubaker J, Al-Mulla F, Peyot ML, Madiraju SRM, Prentki M. ABHD6 suppression promotes anti-inflammatory polarization of adipose tissue macrophages via 2-monoacylglycerol/PPAR signaling in obese mice. Mol Metab 2023; 78:101822. [PMID: 37838014 PMCID: PMC10622714 DOI: 10.1016/j.molmet.2023.101822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 09/25/2023] [Accepted: 10/08/2023] [Indexed: 10/16/2023] Open
Abstract
OBJECTIVE Pro-inflammatory polarization of adipose tissue macrophages (ATMs) plays a critical role in the pathogenesis of obesity-associated chronic inflammation. However, little is known about the role of lipids in the regulation of ATMs polarity and inflammation in response to metabolic stress. Deletion of α/β-hydrolase domain-containing 6 (ABHD6), a monoacylglycerol (MAG) hydrolase, has been shown to protect against diet-induced obesity and insulin resistance. METHODS Here we investigated the immunometabolic role of macrophage ABHD6 in response to nutrient excess using whole-body ABHD6-KO mice and human and murine macrophage cell-lines treated with KT203, a selective and potent pharmacological ABHD6 inhibitor. RESULTS KO mice on high-fat diet showed lower susceptibility to systemic diet-induced inflammation. Moreover, in the setting of overnutrition, stromal vascular cells from gonadal fat of KO vs. control mice contained lower number of M1 macrophages and exhibited enhanced levels of metabolically activated macrophages (MMe) and M2 markers, oxygen consumption, and interleukin-6 (IL-6) release. Likewise, under in vitro nutri-stress condition, inhibition of ABHD6 in MMe-polarized macrophages attenuated the expression and release of pro-inflammatory cytokines and M1 markers and induced the upregulation of lipid metabolism genes. ABHD6-inhibited MMe macrophages showed elevated levels of peroxisome proliferator-activated receptors (PPARs) and 2-MAG species. Notably, among different MAG species, only 2-MAG treatment led to increased levels of PPAR target genes in MMe macrophages. CONCLUSIONS Collectively, our findings identify ABHD6 as a key component of pro-inflammatory macrophage activation in response to excess nutrition and implicate an endogenous macrophage lipolysis/ABHD6/2-MAG/PPARs cascade, as a lipid signaling and immunometabolic pathway, which favors the anti-inflammatory polarization of ATMs in obesity.
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Affiliation(s)
- P Poursharifi
- Montreal Diabetes Research Center - Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Canada.
| | - C Schmitt
- Montreal Diabetes Research Center - Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Canada
| | - I Chenier
- Montreal Diabetes Research Center - Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Canada
| | - Y H Leung
- Montreal Diabetes Research Center - Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Canada
| | - A K Oppong
- Montreal Diabetes Research Center - Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Canada
| | - Y Bai
- Montreal Diabetes Research Center - Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Canada
| | - L-L Klein
- Montreal Diabetes Research Center - Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Canada
| | - A Al-Mass
- Department of Biological Sciences, Faculty of Science, Kuwait University, Kuwait City, Kuwait
| | - R Lussier
- Montreal Diabetes Research Center - Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Canada
| | - M Abu-Farha
- Dasman Diabetes Institute, Kuwait City, Kuwait
| | - J Abubaker
- Dasman Diabetes Institute, Kuwait City, Kuwait
| | - F Al-Mulla
- Dasman Diabetes Institute, Kuwait City, Kuwait
| | - M-L Peyot
- Montreal Diabetes Research Center - Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Canada
| | - S R M Madiraju
- Montreal Diabetes Research Center - Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Canada
| | - M Prentki
- Montreal Diabetes Research Center - Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Canada.
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2
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Singer JM, Shew TM, Ferguson D, Renkemeyer MK, Pietka TA, Hall AM, Finck BN, Lutkewitte AJ. Monoacylglycerol O-acyltransferase 1 lowers adipocyte differentiation capacity in vitro but does not affect adiposity in mice. Obesity (Silver Spring) 2022; 30:2122-2133. [PMID: 36321276 PMCID: PMC9634674 DOI: 10.1002/oby.23538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 06/20/2022] [Accepted: 06/23/2022] [Indexed: 11/29/2022]
Abstract
OBJECTIVE Monoacylglycerol O-acyltransferase 1 (Mogat1), a lipogenic enzyme that converts monoacylglycerol to diacylglycerol, is highly expressed in adipocytes and may regulate lipolysis by re-esterifying fatty acids released during times when lipolytic rates are low. However, the role of Mogat1 in regulating adipocyte fat storage during differentiation and diet-induced obesity is relatively understudied. METHODS Here, adipocyte-specific Mogat1 knockout mice were generated and subjected to a high-fat diet to determine the effects of Mogat1 deficiency on diet-induced obesity. Mogat1 floxed mice were also used to develop preadipocyte cell lines wherein Mogat1 could be conditionally knocked out to study adipocyte differentiation in vitro. RESULTS In preadipocytes, it was found that Mogat1 knockout at the onset of preadipocyte differentiation prevented the accumulation of glycerolipids and reduced the differentiation capacity of preadipocytes. However, the loss of adipocyte Mogat1 did not affect weight gain or fat mass induced by a high-fat diet in mice. Furthermore, loss of Mogat1 in adipocytes did not affect plasma lipid or glucose concentrations or insulin tolerance. CONCLUSIONS These data suggest Mogat1 may play a role in adipocyte differentiation in vitro but not adipose tissue expansion in response to nutrient overload in mice.
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Affiliation(s)
- Jason M. Singer
- Center for Human Nutrition, Washington University School of Medicine, St. Louis, MO
| | - Trevor M. Shew
- Center for Human Nutrition, Washington University School of Medicine, St. Louis, MO
| | - Daniel Ferguson
- Center for Human Nutrition, Washington University School of Medicine, St. Louis, MO
| | - M. Katie Renkemeyer
- Center for Human Nutrition, Washington University School of Medicine, St. Louis, MO
| | - Terri A. Pietka
- Center for Human Nutrition, Washington University School of Medicine, St. Louis, MO
| | - Angela M. Hall
- Center for Human Nutrition, Washington University School of Medicine, St. Louis, MO
| | - Brian N. Finck
- Center for Human Nutrition, Washington University School of Medicine, St. Louis, MO
| | - Andrew J. Lutkewitte
- Center for Human Nutrition, Washington University School of Medicine, St. Louis, MO
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3
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Venugopal J, Wang J, Guo C, Eitzman DT. Amiodarone improves anemia in a murine model of sickle cell disease and is associated with increased erythrocyte bis(monoacylglycerol) phosphate. Sci Rep 2022; 12:16437. [PMID: 36180774 PMCID: PMC9525675 DOI: 10.1038/s41598-022-20955-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 09/21/2022] [Indexed: 11/26/2022] Open
Abstract
Sickle cell disease (SCD) is associated with altered plasma and erythrocyte lipid profiles. In a previous study, SCD mice with deficiency of proprotein convertase subtilisin/kexin type 9 (PCSK9) were observed to have more severe anemia and increased sickling compared to control SCD mice. Although PCSK9 affects circulating low density lipoprotein (LDL) by regulation of the LDL receptor, the effect of PCSK9 on anemia was independent of LDL receptor expression. In the current study, erythrocyte metabolomics were performed and revealed altered erythrocyte lipid species between SCD mice with and without PCSK9. Of particular interest, the late endosome-specific lipid bis(mono)acylglycerol phosphate (BMP) 44:12 was markedly decreased in erythrocytes from SCD mice deficient in PCSK9 mice relative to control SCD mice. Incubation of sickle erythrocytes with a neutralizing antibody to BMP increased erythrocyte sickling in vitro. In vitro treatment of SCD erythrocytes with amiodarone (1.5 μM) or medroxyprogesterone (6.75 μM), two pharmacologic compounds known to increase BMP, resulted in reduced erythrocyte sickling. Treatment of SCD mice with amiodarone (10 mg/kg) for 2 weeks resulted in increased BMP, improvement in anemia with reduced reticulocytosis, and decreased ex vivo sickling. In conclusion, severity of anemia in SCD is improved with amiodarone treatment, an effect which may be mediated through increased erythrocyte BMP.
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Affiliation(s)
- Jessica Venugopal
- Cardiovascular Research Center, University of Michigan Internal Medicine-Cardiology Division, 7301A MSRB III, 1150 West Medical Center Drive, Ann Arbor, MI, 48109-0644, USA
| | - Jintao Wang
- Cardiovascular Research Center, University of Michigan Internal Medicine-Cardiology Division, 7301A MSRB III, 1150 West Medical Center Drive, Ann Arbor, MI, 48109-0644, USA
| | - Chiao Guo
- Cardiovascular Research Center, University of Michigan Internal Medicine-Cardiology Division, 7301A MSRB III, 1150 West Medical Center Drive, Ann Arbor, MI, 48109-0644, USA
| | - Daniel T Eitzman
- Cardiovascular Research Center, University of Michigan Internal Medicine-Cardiology Division, 7301A MSRB III, 1150 West Medical Center Drive, Ann Arbor, MI, 48109-0644, USA.
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Plau J, Golczak M, Paik J, Calderon RM, Blaner WS. Retinol-binding protein 2 (RBP2): More than just dietary retinoid uptake. Biochim Biophys Acta Mol Cell Biol Lipids 2022; 1867:159179. [PMID: 35533980 PMCID: PMC9191623 DOI: 10.1016/j.bbalip.2022.159179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 03/28/2022] [Accepted: 04/22/2022] [Indexed: 01/21/2023]
Abstract
Retinol-binding protein 2 (RBP2, also known as cellular retinol-binding protein 2 (CRBP2)) is a member of the fatty acid-binding protein family and has been extensively studied for its role in facilitating dietary vitamin A (retinol) uptake and metabolism within enterocytes of the small intestine. RBP2 is present in highest concentrations in the proximal small intestine where it constitutes approximately 0.1-0.5% of soluble protein. Recent reports have established that RBP2 binds monoacylglycerols (MAGs) with high affinity, including the canonical endocannabinoid 2-arachidonoylglycerol (2-AG). Crystallographic studies reveal that retinol, 2-AG, or other long-chain MAGs alternatively can bind in the retinol-binding pocket of RBP2. It also has been demonstrated recently that Rbp2-deficient mice are more susceptible to developing obesity and associated metabolic phenotypes when exposed to a high fat diet, or as they age when fed a conventional chow diet. When subjected to an oral fat challenge, the Rbp2-deficient mice release into the circulation significantly more, compared to littermate controls, of the intestinal hormone glucose-dependent insulinotropic polypeptide (GIP). These new findings regarding RBP2 structure and actions within the intestine are the focus of this review.
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Affiliation(s)
- Jacqueline Plau
- Department of Pharmacology and Cleveland Center for Membrane and Structural Biology, Case Western Reserve University, Cleveland, OH, United States of America
| | - Marcin Golczak
- Department of Pharmacology and Cleveland Center for Membrane and Structural Biology, Case Western Reserve University, Cleveland, OH, United States of America
| | - Jisun Paik
- Department of Comparative Medicine, University of Washington, Seattle, WA, United States of America
| | - Rossana M Calderon
- Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, NY, United States of America
| | - William S Blaner
- Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, NY, United States of America.
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Liu T, Guo L, Zhangying Y, Ruan S, Liu W, Zhang X, Feng F. Dietary medium-chain 1-monoglycerides modulates the community and function of cecal microbiota of broilers. J Sci Food Agric 2022; 102:2242-2252. [PMID: 34622457 DOI: 10.1002/jsfa.11562] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 09/30/2021] [Accepted: 10/07/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Medium-chain monoglycerides (MGs) are a group of 1-monoglycerides of medium-chain fatty acids with strong antibacterial activity, which may influence the gut microbiota in the diet of broilers. The present study evaluated the effects of mixed MGs on the community and function of gut microbiota in broilers. A total of 528 newly hatched male yellow feathered broiler chicks were weighed and randomly assigned into four groups, including a basal diet (CON), a basal diet containing 300 mg kg-1 MG (MG300), 450 mg kg-1 MG (MG450), or 600 mg kg-1 MG (MG600). RESULTS The cecal acetic acid, propionic acid, butyric acid, isobutyric acid, isovaleric acid and total short-chain fatty acid of broilers in the MG-containing groups were notably increased compared with the CON group. Dietary MG selectively increased the relative abundance of Bifidobacteriaceae, Bacteroides and an unclassified genus of Lachnospiraceae family, but decreased the proportion of an unclassified genus of Barnesiellaceae and a norank genus of Flavobacteriaceae family in the cecum of broilers. Functional prediction revealed that MG supplementation enriched the microbial gene abundance of amino acid metabolism and carbohydrate metabolism, while depleted the gene abundance of fat metabolism and energy metabolism. Moreover, the modulation of gut microbiota by MG supplementation was closely correlated with the alteration of muscle amino acids. CONCLUSION Dietary MGs altered the gut microbiota community structure and metabolites, and modulated the gene abundance of microbial metabolism pathways in the cecum of broilers, which may further influence the growth performance, nutrient utilization and meat quality of the host. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Tao Liu
- ZhongYuan Institute, Zhejiang University, Zhengzhou, China
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, China
- Hangzhou Longyu Biotechnology Co., Ltd, Hangzhou, China
| | - Liangyong Guo
- Institute of Animal Sciences, Huzhou Academy of Agricultural Sciences, Huzhou, China
| | - Ye Zhangying
- ZhongYuan Institute, Zhejiang University, Zhengzhou, China
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, China
| | - Shengyue Ruan
- ZhongYuan Institute, Zhejiang University, Zhengzhou, China
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, China
| | - Wangxin Liu
- ZhongYuan Institute, Zhejiang University, Zhengzhou, China
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, China
| | - Xi Zhang
- School of Chinese Materia Medica, Yunnan University of Chinese Medicine, Kunming, China
| | - Fengqin Feng
- ZhongYuan Institute, Zhejiang University, Zhengzhou, China
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, China
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Abolghasemi A, Manca C, Iannotti FA, Shen M, Leblanc N, Lacroix S, Martin C, Flamand N, Di Marzo V, Silvestri C. Assessment of the Effects of Dietary Vitamin D Levels on Olanzapine-Induced Metabolic Side Effects: Focus on the Endocannabinoidome-Gut Microbiome Axis. Int J Mol Sci 2021; 22:12361. [PMID: 34830242 PMCID: PMC8620071 DOI: 10.3390/ijms222212361] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 11/02/2021] [Accepted: 11/02/2021] [Indexed: 12/19/2022] Open
Abstract
Vitamin D deficiency is associated with poor mental health and dysmetabolism. Several metabolic abnormalities are associated with psychotic diseases, which can be compounded by atypical antipsychotics that induce weight gain and insulin resistance. These side-effects may be affected by vitamin D levels. The gut microbiota and endocannabinoidome (eCBome) are significant regulators of both metabolism and mental health, but their role in the development of atypical antipsychotic drug metabolic side-effects and their interaction with vitamin D status is unknown. We studied the effects of different combinations of vitamin D levels and atypical antipsychotic drug (olanzapine) exposure on whole-body metabolism and the eCBome-gut microbiota axis in female C57BL/6J mice under a high fat/high sucrose (HFHS) diet in an attempt to identify a link between the latter and the different metabolic outputs induced by the treatments. Olanzapine exerted a protective effect against diet-induced obesity and insulin resistance, largely independent of dietary vitamin D status. These changes were concomitant with olanzapine-mediated decreases in Trpv1 expression and increases in the levels of its agonists, including various N-acylethanolamines and 2-monoacylglycerols, which are consistent with the observed improvement in adiposity and metabolic status. Furthermore, while global gut bacteria community architecture was not altered by olanzapine, we identified changes in the relative abundances of various commensal bacterial families. Taken together, changes of eCBome and gut microbiota families under our experimental conditions might contribute to olanzapine and vitamin D-mediated inhibition of weight gain in mice on a HFHS diet.
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Affiliation(s)
- Armita Abolghasemi
- Centre de Recherche, l’Institut Universitaire de Cardiologie et de Pneumologie de Québec (CRIUCPQ), Québec, QC G1V 4G5, Canada; (A.A.); (C.M.); (M.S.); (N.L.); (S.L.); (C.M.); (N.F.); (V.D.M.)
- Département de Médecine, Faculté de Médecine, Université Laval, Québec, QC G1V 0A6, Canada
- Joint International Unit between the National Research Council (CNR) of Italy and Université Laval on Chemical and Biomolecular Research on the Microbiome and Its Impact on Metabolic Health and Nutrition (UMI-MicroMeNu), Université Laval, Québec, QC G1V 0A6, Canada
| | - Claudia Manca
- Centre de Recherche, l’Institut Universitaire de Cardiologie et de Pneumologie de Québec (CRIUCPQ), Québec, QC G1V 4G5, Canada; (A.A.); (C.M.); (M.S.); (N.L.); (S.L.); (C.M.); (N.F.); (V.D.M.)
- Département de Médecine, Faculté de Médecine, Université Laval, Québec, QC G1V 0A6, Canada
- Joint International Unit between the National Research Council (CNR) of Italy and Université Laval on Chemical and Biomolecular Research on the Microbiome and Its Impact on Metabolic Health and Nutrition (UMI-MicroMeNu), Université Laval, Québec, QC G1V 0A6, Canada
| | - Fabio A. Iannotti
- Joint International Unit between the National Research Council (CNR) of Italy and Université Laval on Chemical and Biomolecular Research on the Microbiome and Its Impact on Metabolic Health and Nutrition (UMI-MicroMeNu), Institute of Biomolecular Chemistry, National Council of Research (Consiglio Nazionale delle Ricerche), 80087 Pozzuoli, Italy;
| | - Melissa Shen
- Centre de Recherche, l’Institut Universitaire de Cardiologie et de Pneumologie de Québec (CRIUCPQ), Québec, QC G1V 4G5, Canada; (A.A.); (C.M.); (M.S.); (N.L.); (S.L.); (C.M.); (N.F.); (V.D.M.)
- Département de Médecine, Faculté de Médecine, Université Laval, Québec, QC G1V 0A6, Canada
| | - Nadine Leblanc
- Centre de Recherche, l’Institut Universitaire de Cardiologie et de Pneumologie de Québec (CRIUCPQ), Québec, QC G1V 4G5, Canada; (A.A.); (C.M.); (M.S.); (N.L.); (S.L.); (C.M.); (N.F.); (V.D.M.)
- Institut sur la Nutrition et les Aliments Fonctionnels (INAF), Québec, QC G1V 0A6, Canada
| | - Sébastien Lacroix
- Centre de Recherche, l’Institut Universitaire de Cardiologie et de Pneumologie de Québec (CRIUCPQ), Québec, QC G1V 4G5, Canada; (A.A.); (C.M.); (M.S.); (N.L.); (S.L.); (C.M.); (N.F.); (V.D.M.)
- Institut sur la Nutrition et les Aliments Fonctionnels (INAF), Québec, QC G1V 0A6, Canada
| | - Cyril Martin
- Centre de Recherche, l’Institut Universitaire de Cardiologie et de Pneumologie de Québec (CRIUCPQ), Québec, QC G1V 4G5, Canada; (A.A.); (C.M.); (M.S.); (N.L.); (S.L.); (C.M.); (N.F.); (V.D.M.)
| | - Nicolas Flamand
- Centre de Recherche, l’Institut Universitaire de Cardiologie et de Pneumologie de Québec (CRIUCPQ), Québec, QC G1V 4G5, Canada; (A.A.); (C.M.); (M.S.); (N.L.); (S.L.); (C.M.); (N.F.); (V.D.M.)
- Département de Médecine, Faculté de Médecine, Université Laval, Québec, QC G1V 0A6, Canada
| | - Vincenzo Di Marzo
- Centre de Recherche, l’Institut Universitaire de Cardiologie et de Pneumologie de Québec (CRIUCPQ), Québec, QC G1V 4G5, Canada; (A.A.); (C.M.); (M.S.); (N.L.); (S.L.); (C.M.); (N.F.); (V.D.M.)
- Département de Médecine, Faculté de Médecine, Université Laval, Québec, QC G1V 0A6, Canada
- Joint International Unit between the National Research Council (CNR) of Italy and Université Laval on Chemical and Biomolecular Research on the Microbiome and Its Impact on Metabolic Health and Nutrition (UMI-MicroMeNu), Université Laval, Québec, QC G1V 0A6, Canada
- Joint International Unit between the National Research Council (CNR) of Italy and Université Laval on Chemical and Biomolecular Research on the Microbiome and Its Impact on Metabolic Health and Nutrition (UMI-MicroMeNu), Institute of Biomolecular Chemistry, National Council of Research (Consiglio Nazionale delle Ricerche), 80087 Pozzuoli, Italy;
- Institut sur la Nutrition et les Aliments Fonctionnels (INAF), Québec, QC G1V 0A6, Canada
- École de Nutrition, Faculté des Sciences de L’agriculture et de L’alimentation (FSAA), Université Laval, Québec, QC G1V 0A6, Canada
- Centre Nutrition, Santé et Société (NUTRISS), Université Laval, Québec, QC G1V 0A6, Canada
| | - Cristoforo Silvestri
- Centre de Recherche, l’Institut Universitaire de Cardiologie et de Pneumologie de Québec (CRIUCPQ), Québec, QC G1V 4G5, Canada; (A.A.); (C.M.); (M.S.); (N.L.); (S.L.); (C.M.); (N.F.); (V.D.M.)
- Département de Médecine, Faculté de Médecine, Université Laval, Québec, QC G1V 0A6, Canada
- Joint International Unit between the National Research Council (CNR) of Italy and Université Laval on Chemical and Biomolecular Research on the Microbiome and Its Impact on Metabolic Health and Nutrition (UMI-MicroMeNu), Université Laval, Québec, QC G1V 0A6, Canada
- Institut sur la Nutrition et les Aliments Fonctionnels (INAF), Québec, QC G1V 0A6, Canada
- Centre Nutrition, Santé et Société (NUTRISS), Université Laval, Québec, QC G1V 0A6, Canada
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Mitra S, Gobira PH, Werner CT, Martin JA, Iida M, Thomas SA, Erias K, Miracle S, Lafargue C, An C, Dietz DM. A role for the endocannabinoid enzymes monoacylglycerol and diacylglycerol lipases in cue-induced cocaine craving following prolonged abstinence. Addict Biol 2021; 26:e13007. [PMID: 33496035 PMCID: PMC11000690 DOI: 10.1111/adb.13007] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 12/25/2020] [Accepted: 01/12/2021] [Indexed: 01/01/2023]
Abstract
Following exposure to drugs of abuse, long-term neuroadaptations underlie persistent risk to relapse. Endocannabinoid signaling has been associated with drug-induced neuroadaptations, but the role of lipases that mediate endocannabinoid biosynthesis and metabolism in regulating relapse behaviors following prolonged periods of drug abstinence has not been examined. Here, we investigated how pharmacological manipulation of lipases involved in regulating the expression of the endocannabinoid 2-AG in the nucleus accumbens (NAc) influence cocaine relapse via discrete neuroadaptations. At prolonged abstinence (30 days) from cocaine self-administration, there is an increase in the NAc levels of diacylglycerol lipase (DAGL), the enzyme responsible for the synthesis of the endocannabinoid 2-AG, along with decreased levels of monoacylglycerol lipase (MAGL), which hydrolyzes 2-AG. Since endocannabinoid-mediated behavioral plasticity involves phosphatase dysregulation, we examined the phosphatase calcineurin after 30 days of abstinence and found decreased expression in the NAc, which we demonstrate is regulated through the transcription factor EGR1. Intra-NAc pharmacological manipulation of DAGL and MAGL with inhibitors DO-34 and URB-602, respectively, bidirectionally regulated cue-induced cocaine seeking and altered the phosphostatus of translational initiation factor, eIF2α. Finally, we found that cocaine seeking 30 days after abstinence leads to decreased phosphorylation of eIF2α and reduced expression of its downstream target NPAS4, a protein involved in experience-dependent neuronal plasticity. Together, our findings demonstrate that lipases that regulate 2-AG expression influence transcriptional and translational changes in the NAc related to drug relapse vulnerability.
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Affiliation(s)
- Swarup Mitra
- Department of Pharmacology and Toxicology, Program in Neuroscience, The State University of New York at Buffalo, Buffalo, NY, USA
- These authors contributed equally to this work
| | - Pedro H. Gobira
- Department of Pharmacology and Toxicology, Program in Neuroscience, The State University of New York at Buffalo, Buffalo, NY, USA
- Department of Physics and Chemistry, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
- These authors contributed equally to this work
| | - Craig T. Werner
- Department of Pharmacology and Toxicology, Program in Neuroscience, The State University of New York at Buffalo, Buffalo, NY, USA
| | - Jennifer A. Martin
- Department of Pharmacology and Toxicology, Program in Neuroscience, The State University of New York at Buffalo, Buffalo, NY, USA
| | - Madoka Iida
- Department of Pharmacology and Toxicology, Program in Neuroscience, The State University of New York at Buffalo, Buffalo, NY, USA
| | - Shruthi A. Thomas
- Department of Pharmacology and Toxicology, Program in Neuroscience, The State University of New York at Buffalo, Buffalo, NY, USA
| | - Kyra Erias
- Department of Pharmacology and Toxicology, Program in Neuroscience, The State University of New York at Buffalo, Buffalo, NY, USA
| | - Sophia Miracle
- Department of Pharmacology and Toxicology, Program in Neuroscience, The State University of New York at Buffalo, Buffalo, NY, USA
| | - Charles Lafargue
- Department of Pharmacology and Toxicology, Program in Neuroscience, The State University of New York at Buffalo, Buffalo, NY, USA
| | - Chunna An
- Department of Pharmacology and Toxicology, Program in Neuroscience, The State University of New York at Buffalo, Buffalo, NY, USA
| | - David M. Dietz
- Department of Pharmacology and Toxicology, Program in Neuroscience, The State University of New York at Buffalo, Buffalo, NY, USA
- Department of Psychology, The State University of New York at Buffalo, Buffalo, NY, USA
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8
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Ilnytska O, Lai K, Gorshkov K, Schultz ML, Tran BN, Jeziorek M, Kunkel TJ, Azaria RD, McLoughlin HS, Waghalter M, Xu Y, Schlame M, Altan-Bonnet N, Zheng W, Lieberman AP, Dobrowolski R, Storch J. Enrichment of NPC1-deficient cells with the lipid LBPA stimulates autophagy, improves lysosomal function, and reduces cholesterol storage. J Biol Chem 2021; 297:100813. [PMID: 34023384 PMCID: PMC8294588 DOI: 10.1016/j.jbc.2021.100813] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Revised: 04/29/2021] [Accepted: 05/19/2021] [Indexed: 02/06/2023] Open
Abstract
Niemann-Pick C (NPC) is an autosomal recessive disorder characterized by mutations in the NPC1 or NPC2 genes encoding endolysosomal lipid transport proteins, leading to cholesterol accumulation and autophagy dysfunction. We have previously shown that enrichment of NPC1-deficient cells with the anionic lipid lysobisphosphatidic acid (LBPA; also called bis(monoacylglycerol)phosphate) via treatment with its precursor phosphatidylglycerol (PG) results in a dramatic decrease in cholesterol storage. However, the mechanisms underlying this reduction are unknown. In the present study, we showed using biochemical and imaging approaches in both NPC1-deficient cellular models and an NPC1 mouse model that PG incubation/LBPA enrichment significantly improved the compromised autophagic flux associated with NPC1 disease, providing a route for NPC1-independent endolysosomal cholesterol mobilization. PG/LBPA enrichment specifically enhanced the late stages of autophagy, and effects were mediated by activation of the lysosomal enzyme acid sphingomyelinase. PG incubation also led to robust and specific increases in LBPA species with polyunsaturated acyl chains, potentially increasing the propensity for membrane fusion events, which are critical for late-stage autophagy progression. Finally, we demonstrated that PG/LBPA treatment efficiently cleared cholesterol and toxic protein aggregates in Purkinje neurons of the NPC1I1061T mouse model. Collectively, these findings provide a mechanistic basis supporting cellular LBPA as a potential new target for therapeutic intervention in NPC disease.
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Affiliation(s)
- Olga Ilnytska
- Department of Nutritional Sciences, Rutgers University, New Brunswick, New Jersey, USA; Rutgers Center for Lipid Research, Rutgers University, New Brunswick, New Jersey, USA.
| | - Kimberly Lai
- Department of Nutritional Sciences, Rutgers University, New Brunswick, New Jersey, USA
| | - Kirill Gorshkov
- National Center for Advancing Translational Sciences, National Institutes of Health, Bethesda, Maryland, USA
| | - Mark L Schultz
- Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Bruce Nguyen Tran
- National Center for Advancing Translational Sciences, National Institutes of Health, Bethesda, Maryland, USA
| | - Maciej Jeziorek
- Department of Biological Sciences, Rutgers University, Newark, New Jersey, USA
| | - Thaddeus J Kunkel
- Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Ruth D Azaria
- Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Hayley S McLoughlin
- Department of Neurology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Miriam Waghalter
- Department of Nutritional Sciences, Rutgers University, New Brunswick, New Jersey, USA
| | - Yang Xu
- Departments of Anesthesiology and Cell Biology, New York University School of Medicine, New York, New York, USA
| | - Michael Schlame
- Departments of Anesthesiology and Cell Biology, New York University School of Medicine, New York, New York, USA
| | - Nihal Altan-Bonnet
- Laboratory of Host-Pathogen Dynamics, National Heart, Lung and Blood Institute, Bethesda, Maryland, USA
| | - Wei Zheng
- National Center for Advancing Translational Sciences, National Institutes of Health, Bethesda, Maryland, USA
| | - Andrew P Lieberman
- Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Radek Dobrowolski
- Department of Biological Sciences, Rutgers University, Newark, New Jersey, USA; Rutgers Center for Lipid Research, Rutgers University, New Brunswick, New Jersey, USA
| | - Judith Storch
- Department of Nutritional Sciences, Rutgers University, New Brunswick, New Jersey, USA; Rutgers Center for Lipid Research, Rutgers University, New Brunswick, New Jersey, USA.
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9
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Paget TL, Parkinson-Lawrence EJ, Trim PJ, Autilio C, Panchal MH, Koster G, Echaide M, Snel MF, Postle AD, Morrison JL, Pérez-Gil J, Orgeig S. Increased Alveolar Heparan Sulphate and Reduced Pulmonary Surfactant Amount and Function in the Mucopolysaccharidosis IIIA Mouse. Cells 2021; 10:849. [PMID: 33918094 PMCID: PMC8070179 DOI: 10.3390/cells10040849] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 03/18/2021] [Accepted: 03/24/2021] [Indexed: 02/07/2023] Open
Abstract
Mucopolysaccharidosis IIIA (MPS IIIA) is a lysosomal storage disease with significant neurological and skeletal pathologies. Respiratory dysfunction is a secondary pathology contributing to mortality in MPS IIIA patients. Pulmonary surfactant is crucial to optimal lung function and has not been investigated in MPS IIIA. We measured heparan sulphate (HS), lipids and surfactant proteins (SP) in pulmonary tissue and bronchoalveolar lavage fluid (BALF), and surfactant activity in healthy and diseased mice (20 weeks of age). Heparan sulphate, ganglioside GM3 and bis(monoacylglycero)phosphate (BMP) were increased in MPS IIIA lung tissue. There was an increase in HS and a decrease in BMP and cholesteryl esters (CE) in MPS IIIA BALF. Phospholipid composition remained unchanged, but BALF total phospholipids were reduced (49.70%) in MPS IIIA. There was a reduction in SP-A, -C and -D mRNA, SP-D protein in tissue and SP-A, -C and -D protein in BALF of MPS IIIA mice. Captive bubble surfactometry showed an increase in minimum and maximum surface tension and percent surface area compression, as well as a higher compressibility and hysteresis in MPS IIIA surfactant upon dynamic cycling. Collectively these biochemical and biophysical changes in alveolar surfactant are likely to be detrimental to lung function in MPS IIIA.
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Affiliation(s)
- Tamara L. Paget
- Mechanisms in Cell Biology and Disease Group, UniSA Clinical and Health Sciences, University of South Australia, Adelaide, SA 5000, Australia; (T.L.P.); (E.J.P.-L.)
| | - Emma J. Parkinson-Lawrence
- Mechanisms in Cell Biology and Disease Group, UniSA Clinical and Health Sciences, University of South Australia, Adelaide, SA 5000, Australia; (T.L.P.); (E.J.P.-L.)
| | - Paul J. Trim
- Proteomics, Metabolomics and MS-Imaging Core Facility, South Australian Health and Medical Research Institute, Adelaide, SA 5000, Australia; (P.J.T.); (M.F.S.)
| | - Chiara Autilio
- Department of Biochemistry, Faculty of Biology and Research Institute Hospital 12 de Octubre (Imas12), Complutense University, 28003 Madrid, Spain; (C.A.); (M.E.); (J.P.-G.)
| | - Madhuriben H. Panchal
- Faculty of Medicine, University of Southampton, Southampton SO16 6YD, UK; (M.H.P.); (G.K.); (A.D.P.)
| | - Grielof Koster
- Faculty of Medicine, University of Southampton, Southampton SO16 6YD, UK; (M.H.P.); (G.K.); (A.D.P.)
| | - Mercedes Echaide
- Department of Biochemistry, Faculty of Biology and Research Institute Hospital 12 de Octubre (Imas12), Complutense University, 28003 Madrid, Spain; (C.A.); (M.E.); (J.P.-G.)
| | - Marten F. Snel
- Proteomics, Metabolomics and MS-Imaging Core Facility, South Australian Health and Medical Research Institute, Adelaide, SA 5000, Australia; (P.J.T.); (M.F.S.)
| | - Anthony D. Postle
- Faculty of Medicine, University of Southampton, Southampton SO16 6YD, UK; (M.H.P.); (G.K.); (A.D.P.)
| | - Janna L. Morrison
- Early Origins Adult Health Research Group, Health and Biomedical Innovation, UniSA Clinical and Health Sciences, University of South Australia, Adelaide, SA 5000, Australia;
| | - Jésus Pérez-Gil
- Department of Biochemistry, Faculty of Biology and Research Institute Hospital 12 de Octubre (Imas12), Complutense University, 28003 Madrid, Spain; (C.A.); (M.E.); (J.P.-G.)
| | - Sandra Orgeig
- Mechanisms in Cell Biology and Disease Group, UniSA Clinical and Health Sciences, University of South Australia, Adelaide, SA 5000, Australia; (T.L.P.); (E.J.P.-L.)
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10
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Carrière F, Longhi S, Record M. The endosomal lipid bis(monoacylglycero) phosphate as a potential key player in the mechanism of action of chloroquine against SARS-COV-2 and other enveloped viruses hijacking the endocytic pathway. Biochimie 2020; 179:237-246. [PMID: 32485205 PMCID: PMC7261073 DOI: 10.1016/j.biochi.2020.05.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 05/26/2020] [Accepted: 05/27/2020] [Indexed: 02/06/2023]
Abstract
The anti-malarial drug Chloroquine (CQ) and its derivative hydroxychloroquine have shown antiviral activities in vitro against many viruses, including coronaviruses, dengue virus and the biosafety level 4 Nipah and Hendra paramyxoviruses. The in vivo efficacy of CQ in the treatment of COVID-19 is currently a matter of debate. CQ is a lysosomotrophic compound that accumulates in lysosomes, as well as in food vacuoles of Plasmodium falciparum. In the treatment of malaria, CQ impairs the digestion and growth of the parasite by increasing the pH of the food vacuole. Similarly, it is assumed that the antiviral effects of CQ results from the increase of lysosome pH and the inhibition of acidic proteases involved in the maturation of virus fusion protein. CQ has however other effects, among which phospholipidosis, characterized by the accumulation of multivesicular bodies within the cell. The increase in phospholipid species particularly concerns bis(monoacylglycero)phosphate (BMP), a specific lipid of late endosomes involved in vesicular trafficking and pH-dependent vesicle budding. It was shown previously that drugs like progesterone, the cationic amphiphile U18666A and the phospholipase inhibitor methyl arachidonyl fluoro phosphonate (MAFP) induce the accumulation of BMP in THP-1 cells and decrease cell infection by human immunodeficiency virus. HIV viral particles were found to be retained into large endosomal-type vesicles, preventing virus spreading. Since BMP was also reported to favour virus entry through hijacking of the endocytic pathway, we propose here that BMP could play a dual role in viral infection, with its antiviral effects triggered by lysosomotropic drugs like CQ.
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Affiliation(s)
- Frédéric Carrière
- Aix Marseille Univ, CNRS, BIP, UMR7281, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 9, France.
| | - Sonia Longhi
- Aix Marseille Univ, CNRS, AFMB, UMR7257, 163 Avenue de Luminy, 13288, Marseille cedex 09, France
| | - Michel Record
- UMR INSERM 1037-CRCT (Cancer Research Center of Toulouse), University of Toulouse III Paul Sabatier, Team "Cholesterol Metabolism and Therapeutic Innovations,", 2 Avenue Hubert Curien, 31037, Toulouse cedex 1, France.
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11
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Luquain-Costaz C, Rabia M, Hullin-Matsuda F, Delton I. Bis(monoacylglycero)phosphate, an important actor in the host endocytic machinery hijacked by SARS-CoV-2 and related viruses. Biochimie 2020; 179:247-256. [PMID: 33159981 PMCID: PMC7642752 DOI: 10.1016/j.biochi.2020.10.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 10/28/2020] [Accepted: 10/29/2020] [Indexed: 12/12/2022]
Abstract
Viruses, including the novel coronavirus SARS-CoV-2, redirect infected cell metabolism to their own purposes. After binding to its receptor angiotensin-converting enzyme 2 (ACE2) on the cell surface, the SARS-CoV-2 is taken up by receptor-mediated endocytosis ending in the acidic endolysosomal compartment. The virus hijacks the endosomal machinery leading to fusion of viral and endosomal membranes and release of the viral RNA into the cytosol. This mini-review specifically highlights the membrane lipid organization of the endosomal system focusing on the unconventional and late endosome/lysosome-specific phospholipid, bis(monoacylglycero)phosphate (BMP). BMP is enriched in alveolar macrophages of lung, one of the target tissue of SARS-CoV-2. This review details the BMP structure, its unsaturated fatty acid composition and fusogenic properties that are essential for the highly dynamic formation of the intraluminal vesicles inside the endosomes. Interestingly, BMP is necessary for infection and replication of enveloped RNA virus such as SARS-CoV-1 and Dengue virus. We also emphasize the role of BMP in lipid sorting and degradation, especially cholesterol transport in cooperation with Niemann Pick type C proteins (NPC 1 and 2) and with some oxysterol-binding protein (OSBP)-related proteins (ORPs) as well as in sphingolipid degradation. Interestingly, numerous virus infection required NPC1 as well as ORPs along the endocytic pathway. Furthermore, BMP content is increased during pathological endosomal lipid accumulation in various lysosomal storage disorders. This is particularly important knowing the high percentage of patients with metabolic disorders among the SARS-CoV-2 infected patients presenting severe forms of COVID-19.
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Affiliation(s)
- Céline Luquain-Costaz
- Univ-Lyon, CarMeN Laboratory, Inserm U1060, INRAe U1397, INSA Lyon, Villeurbanne, France
| | - Maxence Rabia
- Univ-Lyon, CarMeN Laboratory, Inserm U1060, INRAe U1397, INSA Lyon, Villeurbanne, France
| | | | - Isabelle Delton
- Univ-Lyon, CarMeN Laboratory, Inserm U1060, INRAe U1397, INSA Lyon, Villeurbanne, France.
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12
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Showalter MR, Berg AL, Nagourney A, Heil H, Carraway KL, Fiehn O. The Emerging and Diverse Roles of Bis(monoacylglycero) Phosphate Lipids in Cellular Physiology and Disease. Int J Mol Sci 2020; 21:ijms21218067. [PMID: 33137979 PMCID: PMC7663174 DOI: 10.3390/ijms21218067] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 10/22/2020] [Accepted: 10/26/2020] [Indexed: 02/06/2023] Open
Abstract
Although understudied relative to many phospholipids, accumulating evidence suggests that bis(monoacylglycero)phosphate (BMP) is an important class of regulatory lipid that plays key roles in lysosomal integrity and function. BMPs are rare in most mammalian tissues, comprising only a few percent of total cellular lipid content, but are elevated in cell types such as macrophages that rely heavily on lysosomal function. BMPs are markedly enriched in endosomal and lysosomal vesicles compared to other organelles and membranous structures, and their unique sn-1:sn-1′ stereoconfiguration may confer stability within the hydrolytic lysosomal environment. BMP-enriched vesicles serve in endosomal-lysosomal trafficking and function as docking structures for the activation of lysosomal hydrolytic enzymes, notably those involved in the catabolic breakdown of sphingolipids. BMP levels are dysregulated in lysosomal storage disorders, phospholipidosis, metabolic diseases, liver and kidney diseases and neurodegenerative disorders. However, whether BMP alteration is a mediator or simply a marker of pathological states is unclear. Likewise, although BMP acyl chain composition may be altered with disease states, the functional significance of specific BMP species remains to be resolved. Newly developed tools for untargeted lipidomic analysis, together with a deeper understanding of enzymes mediating BMP synthesis and degradation, will help shed further light on the functional significance of BMPs in cellular physiology and pathology.
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Affiliation(s)
- Megan R. Showalter
- NIH West Coast Metabolomics Center, University of California Davis, Davis, CA 95616, USA; (M.R.S.); (A.N.); (H.H.)
| | - Anastasia L. Berg
- Department of Biochemistry and Molecular Medicine, UC Davis School of Medicine, Sacramento, CA 95817, USA; (A.L.B.); (K.L.C.III)
| | - Alexander Nagourney
- NIH West Coast Metabolomics Center, University of California Davis, Davis, CA 95616, USA; (M.R.S.); (A.N.); (H.H.)
| | - Hailey Heil
- NIH West Coast Metabolomics Center, University of California Davis, Davis, CA 95616, USA; (M.R.S.); (A.N.); (H.H.)
| | - Kermit L. Carraway
- Department of Biochemistry and Molecular Medicine, UC Davis School of Medicine, Sacramento, CA 95817, USA; (A.L.B.); (K.L.C.III)
| | - Oliver Fiehn
- NIH West Coast Metabolomics Center, University of California Davis, Davis, CA 95616, USA; (M.R.S.); (A.N.); (H.H.)
- Correspondence:
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13
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Grabner GF, Fawzy N, Schreiber R, Pusch LM, Bulfon D, Koefeler H, Eichmann TO, Lass A, Schweiger M, Marsche G, Schoiswohl G, Taschler U, Zimmermann R. Metabolic regulation of the lysosomal cofactor bis(monoacylglycero)phosphate in mice. J Lipid Res 2020; 61:995-1003. [PMID: 32350080 PMCID: PMC7328040 DOI: 10.1194/jlr.ra119000516] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 04/23/2020] [Indexed: 01/02/2023] Open
Abstract
Bis(monoacylglycero)phosphate (BMP), also known as lysobisphosphatidic acid, is a phospholipid that promotes lipid sorting in late endosomes/lysosomes by activating lipid hydrolases and lipid transfer proteins. Changes in the cellular BMP content therefore reflect an altered metabolic activity of the endolysosomal system. Surprisingly, little is known about the physiological regulation of BMP. In this study, we investigated the effects of nutritional and metabolic factors on BMP profiles of whole tissues and parenchymal and nonparenchymal cells. Tissue samples were obtained from fed, fasted, 2 h refed, and insulin-treated mice, as well as from mice housed at 5°C, 22°C, or 30°C. These tissues exhibited distinct BMP profiles that were regulated by the nutritional state in a tissue-specific manner. Insulin treatment was not sufficient to mimic refeeding-induced changes in tissue BMP levels, indicating that BMP metabolism is regulated by other hormonal or nutritional factors. Tissue fractionation experiments revealed that fasting drastically elevates BMP levels in hepatocytes and pancreatic cells. Furthermore, we observed that the BMP content in brown adipose tissue strongly depends on housing temperatures. In conclusion, our observations suggest that BMP concentrations adapt to the metabolic state in a tissue- and cell-type-specific manner in mice. Drastic changes observed in hepatocytes, pancreatic cells, and brown adipocytes suggest that BMP plays a role in the functional adaption to nutrient starvation and ambient temperature.
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Affiliation(s)
- Gernot F Grabner
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Nermeen Fawzy
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Renate Schreiber
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Lisa M Pusch
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Dominik Bulfon
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Harald Koefeler
- Otto Loewi Research Center, and Center for Medical Research, Medical University of Graz, Graz, Austria; BioTechMed-Graz, Graz, Austria
| | - Thomas O Eichmann
- Institute of Molecular Biosciences, University of Graz, Graz, Austria; Center for Explorative Lipidomics, BioTechMed-Graz, Graz, Austria
| | - Achim Lass
- Institute of Molecular Biosciences, University of Graz, Graz, Austria; BioTechMed-Graz, Graz, Austria
| | - Martina Schweiger
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Gunther Marsche
- Division of Pharmacology, Medical University of Graz, Graz, Austria; BioTechMed-Graz, Graz, Austria
| | | | - Ulrike Taschler
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Robert Zimmermann
- Institute of Molecular Biosciences, University of Graz, Graz, Austria; BioTechMed-Graz, Graz, Austria. mailto:
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14
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Welch JL, Xiang J, Okeoma CM, Schlievert PM, Stapleton JT. Glycerol Monolaurate, an Analogue to a Factor Secreted by Lactobacillus, Is Virucidal against Enveloped Viruses, Including HIV-1. mBio 2020; 11:e00686-20. [PMID: 32371599 PMCID: PMC7201201 DOI: 10.1128/mbio.00686-20] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 04/10/2020] [Indexed: 12/15/2022] Open
Abstract
The vaginal microbiota influences sexual transmission of human immunodeficiency virus type 1 (HIV-1). Colonization of the vaginal tract is normally dominated by Lactobacillus species. Both Lactobacillus and Enterococcus faecalis may secrete reutericyclin, which inhibits the growth of a variety of pathogenic bacteria. Increasing evidence suggests a potential therapeutic role for an analogue of reutericyclin, glycerol monolaurate (GML), against microbial pathogens. Previous studies using a macaque vaginal simian immunodeficiency virus (SIV) transmission model demonstrated that GML reduces transmission and alters immune responses to infection in vitro Previous studies showed that structural analogues of GML negatively impact other enveloped viruses. We sought to expand understanding of how GML inhibits HIV-1 and other enveloped viruses and show that GML restricts HIV-1 entry post-CD4 engagement at the step of coreceptor binding. Further, HIV-1 and yellow fever virus (YFV) particles were more sensitive to GML interference than particles "matured" by proteolytic processing. We show that high-pressure-liquid-chromatography (HPLC)-purified reutericyclin and reutericyclin secreted by Lactobacillus inhibit HIV-1. These data emphasize the importance and protective nature of the normal vaginal flora during viral infections and provide insights into the antiviral mechanism of GML during HIV-1 infection and, more broadly, to other enveloped viruses.IMPORTANCE A total of 340 million sexually transmitted infections (STIs) are acquired each year. Antimicrobial agents that target multiple infectious pathogens are ideal candidates to reduce the number of newly acquired STIs. The antimicrobial and immunoregulatory properties of GML make it an excellent candidate to fit this critical need. Previous studies established the safety profile and antibacterial activity of GML against both Gram-positive and Gram-negative bacteria. GML protected against high-dose SIV infection and reduced inflammation, which can exacerbate disease, during infection. We found that GML inhibits HIV-1 and other human-pathogenic viruses (yellow fever virus, mumps virus, and Zika virus), broadening its antimicrobial range. Because GML targets diverse infectious pathogens, GML may be an effective agent against the broad range of sexually transmitted pathogens. Further, our data show that reutericyclin, a GML analog expressed by some lactobacillus species, also inhibits HIV-1 replication and thus may contribute to the protective effect of Lactobacillus in HIV-1 transmission.
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Affiliation(s)
- Jennifer L Welch
- Department of Microbiology and Immunology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
- Medical Service, Iowa City Veterans Affairs Medical Center, Iowa City, Iowa, USA
- Department of Internal Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Jinhua Xiang
- Department of Microbiology and Immunology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
- Medical Service, Iowa City Veterans Affairs Medical Center, Iowa City, Iowa, USA
- Department of Internal Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Chioma M Okeoma
- Department of Pharmacology, Stony Brook University School of Medicine, Stony Brook, New York, USA
| | - Patrick M Schlievert
- Department of Microbiology and Immunology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Jack T Stapleton
- Department of Microbiology and Immunology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
- Medical Service, Iowa City Veterans Affairs Medical Center, Iowa City, Iowa, USA
- Department of Internal Medicine, University of Iowa, Iowa City, Iowa, USA
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15
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Lee SA, Yang KJZ, Brun PJ, Silvaroli JA, Yuen JJ, Shmarakov I, Jiang H, Feranil JB, Li X, Lackey AI, Krężel W, Leibel RL, Libien J, Storch J, Golczak M, Blaner WS. Retinol-binding protein 2 (RBP2) binds monoacylglycerols and modulates gut endocrine signaling and body weight. Sci Adv 2020; 6:eaay8937. [PMID: 32195347 PMCID: PMC7065888 DOI: 10.1126/sciadv.aay8937] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 12/16/2019] [Indexed: 05/09/2023]
Abstract
Expressed in the small intestine, retinol-binding protein 2 (RBP2) facilitates dietary retinoid absorption. Rbp2-deficient (Rbp2-/- ) mice fed a chow diet exhibit by 6-7 months-of-age higher body weights, impaired glucose metabolism, and greater hepatic triglyceride levels compared to controls. These phenotypes are also observed when young Rbp2-/- mice are fed a high fat diet. Retinoids do not account for the phenotypes. Rather, RBP2 is a previously unidentified monoacylglycerol (MAG)-binding protein, interacting with the endocannabinoid 2-arachidonoylglycerol (2-AG) and other MAGs with affinities comparable to retinol. X-ray crystallographic studies show that MAGs bind in the retinol binding pocket. When challenged with an oil gavage, Rbp2-/- mice show elevated mucosal levels of 2-MAGs. This is accompanied by significantly elevated blood levels of the gut hormone GIP (glucose-dependent insulinotropic polypeptide). Thus, RBP2, in addition to facilitating dietary retinoid absorption, modulates MAG metabolism and likely signaling, playing a heretofore unknown role in systemic energy balance.
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Affiliation(s)
- Seung-Ah Lee
- Department of Medicine, Institute of Human Nutrition, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Kryscilla Jian Zhang Yang
- Department of Medicine, Institute of Human Nutrition, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Pierre-Jacques Brun
- Department of Medicine, Institute of Human Nutrition, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Josie A. Silvaroli
- Department of Pharmacology, Case Western Reserve University, Cleveland, OH, USA
| | - Jason J. Yuen
- Department of Medicine, Institute of Human Nutrition, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Igor Shmarakov
- Department of Medicine, Institute of Human Nutrition, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Hongfeng Jiang
- Department of Medicine, Institute of Human Nutrition, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Jun B. Feranil
- Department of Medicine, Institute of Human Nutrition, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Xueting Li
- PhD Program in Nutritional and Metabolic Biology, Institute of Human Nutrition, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Atreju I. Lackey
- Department of Nutritional Sciences and Rutgers Center for Lipid Research, Rutgers University, New Brunswick, NJ, USA
| | - Wojciech Krężel
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, U1258, CNRS, UMR 7104, Unistra, Illkirch 67404, France
| | - Rudolph L. Leibel
- Department of Pediatrics, Institute of Human Nutrition, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Jenny Libien
- Department of Pathology, SUNY Downstate Medical Center, Brooklyn, NY, USA
| | - Judith Storch
- Department of Nutritional Sciences and Rutgers Center for Lipid Research, Rutgers University, New Brunswick, NJ, USA
| | - Marcin Golczak
- Department of Pharmacology, Case Western Reserve University, Cleveland, OH, USA
- Cleveland Center for Membrane and Structural Biology, Case Western Reserve University, Cleveland, OH, USA
| | - William S. Blaner
- Department of Medicine, Institute of Human Nutrition, College of Physicians and Surgeons, Columbia University, New York, NY, USA
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16
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Moreau D, Vacca F, Vossio S, Scott C, Colaco A, Paz Montoya J, Ferguson C, Damme M, Moniatte M, Parton RG, Platt FM, Gruenberg J. Drug-induced increase in lysobisphosphatidic acid reduces the cholesterol overload in Niemann-Pick type C cells and mice. EMBO Rep 2019; 20:e47055. [PMID: 31267706 PMCID: PMC6607015 DOI: 10.15252/embr.201847055] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 04/12/2019] [Accepted: 04/23/2019] [Indexed: 12/26/2022] Open
Abstract
Most cells acquire cholesterol by endocytosis of circulating low-density lipoproteins (LDLs). After cholesteryl ester de-esterification in endosomes, free cholesterol is redistributed to intracellular membranes via unclear mechanisms. Our previous work suggested that the unconventional phospholipid lysobisphosphatidic acid (LBPA) may play a role in modulating the cholesterol flux through endosomes. In this study, we used the Prestwick library of FDA-approved compounds in a high-content, image-based screen of the endosomal lipids, lysobisphosphatidic acid and LDL-derived cholesterol. We report that thioperamide maleate, an inverse agonist of the histamine H3 receptor HRH3, increases highly selectively the levels of lysobisphosphatidic acid, without affecting any endosomal protein or function that we tested. Our data also show that thioperamide significantly reduces the endosome cholesterol overload in fibroblasts from patients with the cholesterol storage disorder Niemann-Pick type C (NPC), as well as in liver of Npc1-/- mice. We conclude that LBPA controls endosomal cholesterol mobilization and export to cellular destinations, perhaps by fluidifying or buffering cholesterol in endosomal membranes, and that thioperamide has repurposing potential for the treatment of NPC.
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Affiliation(s)
- Dimitri Moreau
- Department of BiochemistryUniversity of GenevaGeneva 4Switzerland
| | - Fabrizio Vacca
- Department of BiochemistryUniversity of GenevaGeneva 4Switzerland
| | - Stefania Vossio
- Department of BiochemistryUniversity of GenevaGeneva 4Switzerland
| | - Cameron Scott
- Department of BiochemistryUniversity of GenevaGeneva 4Switzerland
| | | | | | - Charles Ferguson
- Institute for Molecular Bioscience and Center for Microscopy and MicroanalysisUniversity of QueenslandBrisbaneQldAustralia
| | - Markus Damme
- Biochemisches InstitutChristian‐Albrechts‐UniversitätKielGermany
| | - Marc Moniatte
- Mass Spectrometry Core FacilityEPFLLausanneSwitzerland
| | - Robert G Parton
- Institute for Molecular Bioscience and Center for Microscopy and MicroanalysisUniversity of QueenslandBrisbaneQldAustralia
| | | | - Jean Gruenberg
- Department of BiochemistryUniversity of GenevaGeneva 4Switzerland
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17
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Zhao M, Cai H, Liu M, Deng L, Li Y, Zhang H, Feng F. Dietary glycerol monolaurate supplementation for the modification of functional properties of egg white protein. J Sci Food Agric 2019; 99:3852-3859. [PMID: 30680726 DOI: 10.1002/jsfa.9607] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 01/12/2019] [Accepted: 01/22/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND Understanding the interactions between feed additives and the functional properties of egg white protein (EWP) may offer novel insights into the effects of feed additives on laying hens and may provide an alternative for modification of the functional properties of EWP by using laying hens as bioreactors. Glycerol monolaurate (GML) is widely used in the food industry as an effective antibacterial emulsifier. In this work, the effects of three doses of dietary GML supplementation (150, 300, and 450 mg kg-1 hen) on the functional properties of EWP were investigated. RESULTS The hardness of EWP gels was significantly improved by 300 and 450 mg kg-1 GML supplementation. Foaming capacity (FC) and foaming stability (FS) were increased after GML treatment; 450 mg kg-1 GML supplementation showed the most significant improvements, with 44.82% in FC and 23.39% in FS. Stabilization of EWP-oil emulsions was also improved, supported by a slowed creaming process and the formation of smaller oil droplets. The heat denaturation temperature and rheological properties were also modified by dietary GML supplementation, implying improved thermal stability. CONCLUSION Our study demonstrated that GML supplementation has the potential to modify the functional properties of EWP, broadening the application of GML and providing a new perspective for evaluation of the efficacy of feed additives. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Minjie Zhao
- College of Biosystems Engineering and Food Science, National Engineering Laboratory of Intelligent Food Technology and Equipment, Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Key Laboratory for Agro-Products Nutritional Evaluation of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang University, Hangzhou, China
| | - Haiying Cai
- Zhejiang Key Lab for Chem & Bio Processing Technology of Farm Product, Zhejiang University of Science and Technology, Hangzhou, China
| | - Mengyun Liu
- College of Biosystems Engineering and Food Science, National Engineering Laboratory of Intelligent Food Technology and Equipment, Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Key Laboratory for Agro-Products Nutritional Evaluation of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang University, Hangzhou, China
| | - Lingli Deng
- College of Biosystems Engineering and Food Science, National Engineering Laboratory of Intelligent Food Technology and Equipment, Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Key Laboratory for Agro-Products Nutritional Evaluation of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang University, Hangzhou, China
| | - Yang Li
- College of Biosystems Engineering and Food Science, National Engineering Laboratory of Intelligent Food Technology and Equipment, Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Key Laboratory for Agro-Products Nutritional Evaluation of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang University, Hangzhou, China
| | - Hui Zhang
- College of Biosystems Engineering and Food Science, National Engineering Laboratory of Intelligent Food Technology and Equipment, Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Key Laboratory for Agro-Products Nutritional Evaluation of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang University, Hangzhou, China
| | - Fengqin Feng
- College of Biosystems Engineering and Food Science, National Engineering Laboratory of Intelligent Food Technology and Equipment, Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Key Laboratory for Agro-Products Nutritional Evaluation of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang University, Hangzhou, China
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18
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Marcos AL, Corradi GR, Mazzitelli LR, Casali CI, Fernández Tome MDC, Adamo HP, de Tezanos Pinto F. The Parkinson-associated human P5B-ATPase ATP13A2 modifies lipid homeostasis. Biochim Biophys Acta Biomembr 2019; 1861:182993. [PMID: 31132336 DOI: 10.1016/j.bbamem.2019.05.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Revised: 05/21/2019] [Accepted: 05/22/2019] [Indexed: 12/12/2022]
Abstract
Mutations in the ATP13A2 gene (PARK9, CLN12, OMIM 610513) were initially associated with a form of Parkinson's Disease (PD) known as Kufor Rakeb Syndrome (KRS). However, the genetic spectrum of ATP13A2-associated disorders was expanded in the last years, because it has been found to underlay variants of neuronal ceroid-lipofuscinoses (NCLs) and hereditary spastic paraplegia. As ATP13A2 seems to be a key component of the endo-lysosome pathway, the fact that these pathologies are commonly characterized by endo-lysosomal dysfunction is not surprising. Here we report that increasing the level of functional ATP13A2 in a stable SH-SY5Y cell line disrupts lipid homeostasis. ATP13A2 overexpression increases the fluorescence intensity of the fluorescent analog phosphatidylethanolamine (NBD-PE) and the formation of multilamellar bodies, resembling the so-called "drug-induced phospholipidosis". We also found that expression of ATP13A2 reduces the ceramide-fluorescence intensity and the content of bis(monoacylglyceryl)phosphate (BMP). BMP is required for lipid degradation and exosome biogenesis inside acidic compartments, so this result suggests that ATP13A2 may be modifying the lipid digestion capacity and/or the redistribution of lipids in these subcellular organelles. In addition, ATP13A2-overexpression decreased the total content of triglycerides (TGs), cholesterol and lipid droplets. As TGs are necessary for the synthesis of new membranes, this observation suggests that increasing the function of ATP13A2 switches the endo-lysosomal system towards vesicle secretion.
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Affiliation(s)
- Alejandra Lucía Marcos
- Department of Biological Chemistry, School of Pharmacy and Biochemistry, University of Buenos (UBA), Junín 956, 1113 Buenos Aires, Argentina; Institute of Biochemistry and Biophysics, Consejo Nacional de Investigaciones Científicas y Tecnológicas (IQUIFIB-CONICET), Junín 956, 1113 Buenos Aires, Argentina
| | - Gerardo Raul Corradi
- Department of Biological Chemistry, School of Pharmacy and Biochemistry, University of Buenos (UBA), Junín 956, 1113 Buenos Aires, Argentina; Institute of Biochemistry and Biophysics, Consejo Nacional de Investigaciones Científicas y Tecnológicas (IQUIFIB-CONICET), Junín 956, 1113 Buenos Aires, Argentina
| | - Luciana Romina Mazzitelli
- Department of Biological Chemistry, School of Pharmacy and Biochemistry, University of Buenos (UBA), Junín 956, 1113 Buenos Aires, Argentina; Institute of Biochemistry and Biophysics, Consejo Nacional de Investigaciones Científicas y Tecnológicas (IQUIFIB-CONICET), Junín 956, 1113 Buenos Aires, Argentina
| | - Cecilia Irene Casali
- Department of Biological Sciences, School of Pharmacy and Biochemistry, University of Buenos Aires (UBA), Junín 956, 1113 Buenos Aires, Argentina; Institute of Biochemistry and Biophysics, Consejo Nacional de Investigaciones Científicas y Tecnológicas (IQUIFIB-CONICET), Junín 956, 1113 Buenos Aires, Argentina
| | - María Del Carmen Fernández Tome
- Department of Biological Sciences, School of Pharmacy and Biochemistry, University of Buenos Aires (UBA), Junín 956, 1113 Buenos Aires, Argentina; Institute of Biochemistry and Biophysics, Consejo Nacional de Investigaciones Científicas y Tecnológicas (IQUIFIB-CONICET), Junín 956, 1113 Buenos Aires, Argentina
| | - Hugo Pedro Adamo
- Department of Biological Chemistry, School of Pharmacy and Biochemistry, University of Buenos (UBA), Junín 956, 1113 Buenos Aires, Argentina; Institute of Biochemistry and Biophysics, Consejo Nacional de Investigaciones Científicas y Tecnológicas (IQUIFIB-CONICET), Junín 956, 1113 Buenos Aires, Argentina
| | - Felicitas de Tezanos Pinto
- Department of Biological Sciences, School of Pharmacy and Biochemistry, University of Buenos Aires (UBA), Junín 956, 1113 Buenos Aires, Argentina; Department of Biological Chemistry, School of Pharmacy and Biochemistry, University of Buenos (UBA), Junín 956, 1113 Buenos Aires, Argentina; Institute of Biochemistry and Biophysics, Consejo Nacional de Investigaciones Científicas y Tecnológicas (IQUIFIB-CONICET), Junín 956, 1113 Buenos Aires, Argentina.
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19
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Grabner GF, Fawzy N, Pribasnig MA, Trieb M, Taschler U, Holzer M, Schweiger M, Wolinski H, Kolb D, Horvath A, Breinbauer R, Rülicke T, Rabl R, Lass A, Stadlbauer V, Hutter-Paier B, Stauber RE, Fickert P, Zechner R, Marsche G, Eichmann TO, Zimmermann R. Metabolic disease and ABHD6 alter the circulating bis(monoacylglycerol)phosphate profile in mice and humans. J Lipid Res 2019; 60:1020-1031. [PMID: 30894461 PMCID: PMC6495172 DOI: 10.1194/jlr.m093351] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 03/18/2019] [Indexed: 02/03/2023] Open
Abstract
Bis(monoacylglycerol)phosphate (BMP) is a phospholipid that is crucial for lipid degradation and sorting in acidic organelles. Genetic and drug-induced lysosomal storage disorders (LSDs) are associated with increased BMP concentrations in tissues and in the circulation. Data on BMP in disorders other than LSDs, however, are scarce, and key enzymes regulating BMP metabolism remain elusive. Here, we demonstrate that common metabolic disorders and the intracellular BMP hydrolase α/β-hydrolase domain-containing 6 (ABHD6) affect BMP metabolism in mice and humans. In mice, dietary lipid overload strongly affects BMP concentration and FA composition in the liver and plasma, similar to what has been observed in LSDs. Notably, distinct changes in the BMP FA profile enable a clear distinction between lipid overload and drug-induced LSDs. Global deletion of ABHD6 increases circulating BMP concentrations but does not cause LSDs. In humans, nonalcoholic fatty liver disease and liver cirrhosis affect the serum BMP FA composition and concentration. Furthermore, we identified a patient with a loss-of-function mutation in the ABHD6 gene, leading to an altered circulating BMP profile. In conclusion, our results suggest that common metabolic diseases and ABHD6 affect BMP metabolism in mice and humans.
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Affiliation(s)
- Gernot F Grabner
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Nermeen Fawzy
- Institute of Molecular Biosciences, University of Graz, Graz, Austria; BioTechMed-Graz Graz, Austria
| | - Maria A Pribasnig
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Markus Trieb
- Division of Pharmacology Otto Loewi Research Center, Medical University of Graz, Graz, Austria
| | - Ulrike Taschler
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Michael Holzer
- Division of Pharmacology Otto Loewi Research Center, Medical University of Graz, Graz, Austria
| | - Martina Schweiger
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Heimo Wolinski
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Dagmar Kolb
- Core Facility Ultrastructure Analysis Division of Cell Biology, Histology and Embryology, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria
| | - Angela Horvath
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Rolf Breinbauer
- Institute of Organic Chemistry Graz University of Technology, Graz, Austria; BioTechMed-Graz Graz, Austria
| | - Thomas Rülicke
- Institute of Laboratory Animal Science University of Veterinary Medicine Vienna, Vienna, Austria
| | | | - Achim Lass
- Institute of Molecular Biosciences, University of Graz, Graz, Austria; BioTechMed-Graz Graz, Austria
| | - Vanessa Stadlbauer
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | | | - Rudolf E Stauber
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Peter Fickert
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Rudolf Zechner
- Institute of Molecular Biosciences, University of Graz, Graz, Austria; BioTechMed-Graz Graz, Austria
| | - Gunther Marsche
- Division of Pharmacology Otto Loewi Research Center, Medical University of Graz, Graz, Austria; BioTechMed-Graz Graz, Austria
| | - Thomas O Eichmann
- Institute of Molecular Biosciences, University of Graz, Graz, Austria; Center for Explorative Lipidomics Graz, Austria; BioTechMed-Graz Graz, Austria.
| | - Robert Zimmermann
- Institute of Molecular Biosciences, University of Graz, Graz, Austria; BioTechMed-Graz Graz, Austria. robert.zimmermann@uni-graz
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20
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Wei Y, Xiong ZJ, Li J, Zou C, Cairo CW, Klassen JS, Privé GG. Crystal structures of human lysosomal EPDR1 reveal homology with the superfamily of bacterial lipoprotein transporters. Commun Biol 2019; 2:52. [PMID: 30729188 PMCID: PMC6363788 DOI: 10.1038/s42003-018-0262-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 12/11/2018] [Indexed: 01/01/2023] Open
Abstract
EPDR1, a member of the ependymin-related protein family, is a relatively uncharacterized protein found in the lysosomes and secretomes of most vertebrates. Despite having roles in human disease and health, the molecular functions of EPDR1 remain unknown. Here, we present crystal structures of human EPDR1 and reveal that the protein adopts a fold previously seen only in bacterial proteins related to the LolA lipoprotein transporter. EPDR1 forms a homodimer with an overall shape resembling a half-shell with two non-overlapping hydrophobic grooves on the flat side of the hemisphere. EPDR1 can interact with membranes that contain negatively charged lipids, including BMP and GM1, and we suggest that EPDR1 may function as a lysosomal activator protein or a lipid transporter. A phylogenetic analysis reveals that the fold is more widely distributed than previously suspected, with representatives identified in all branches of cellular life.
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Affiliation(s)
- Yong Wei
- Princess Margaret Cancer Centre, Toronto, M5G 1L7 ON Canada
| | - Zi Jian Xiong
- Department of Biochemistry, University of Toronto, Toronto, M5S 1A8 ON Canada
| | - Jun Li
- Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton, T6G 2G2 AB Canada
| | - Chunxia Zou
- Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton, T6G 2G2 AB Canada
| | - Christopher W. Cairo
- Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton, T6G 2G2 AB Canada
| | - John S. Klassen
- Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton, T6G 2G2 AB Canada
| | - Gilbert G. Privé
- Princess Margaret Cancer Centre, Toronto, M5G 1L7 ON Canada
- Department of Biochemistry, University of Toronto, Toronto, M5S 1A8 ON Canada
- Department of Medical Biophysics, University of Toronto, Toronto, M5G 1L7 ON Canada
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21
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Peppino Margutti M, Gaveglio VL, Reyna M, Pasquaré SJ, Racagni GE, Villasuso AL. Differential phosphatidic acid metabolism in barley leaves and roots induced by chilling temperature. Plant Physiol Biochem 2018; 132:174-182. [PMID: 30199789 DOI: 10.1016/j.plaphy.2018.08.038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 08/28/2018] [Accepted: 08/28/2018] [Indexed: 06/08/2023]
Abstract
Phosphatidic acid (PA) is an important bioactive lipid that mediates chilling responses in barley. Modifications in the lipid composition of cellular membranes during chilling are essential to maintain their integrity and fluidity. First, we investigated the molecular species of PA present in leaves and roots by ESI-MS/MS, to evaluate the modifications that occur in response to chilling. We demonstrated that PA pools in leaves differ from PA fatty acid composition in roots. Compared with plants grown at 25 °C, the short-term and long-term chilling for 3 h and 36 h at 4 °C not produced significant changes in PA molecular species. The endogenous DAG and PA phosphorylation by in vitro DAG and PA kinase activities showed higher activity in leaves compared with that in root, and they showed contrasting responses to chilling. Similarly, PA removal by phosphatidate phosphohydrolase was tested, showing that this activity was specifically increased in response to chilling in roots. The findings presented here may be helpful to understand how the PA signal is modulated between tissues, and may serve to highlight the importance of knowing the basal PA pools in different plant organs.
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Affiliation(s)
- Micaela Peppino Margutti
- Dpto. de Biología Molecular, FCEFQN, Universidad Nacional de Río Cuarto, X5804BYA, Río Cuarto, Córdoba, Argentina
| | - Virginia L Gaveglio
- Instituto de Investigaciones Bioquímicas de Bahía Blanca INIBIBB, UNS-CONICET, Edificio E1, Camino La Carrindanga Km 7, 8000, Bahía Blanca, Argentina; Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, San Juan 670, 8000, Bahía Blanca, Argentina
| | - Mercedes Reyna
- Dpto. de Biología Molecular, FCEFQN, Universidad Nacional de Río Cuarto, X5804BYA, Río Cuarto, Córdoba, Argentina
| | - Susana J Pasquaré
- Instituto de Investigaciones Bioquímicas de Bahía Blanca INIBIBB, UNS-CONICET, Edificio E1, Camino La Carrindanga Km 7, 8000, Bahía Blanca, Argentina; Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, San Juan 670, 8000, Bahía Blanca, Argentina
| | - Graciela E Racagni
- Dpto. de Biología Molecular, FCEFQN, Universidad Nacional de Río Cuarto, X5804BYA, Río Cuarto, Córdoba, Argentina
| | - Ana Laura Villasuso
- Dpto. de Biología Molecular, FCEFQN, Universidad Nacional de Río Cuarto, X5804BYA, Río Cuarto, Córdoba, Argentina.
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22
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Tso P, Vurma M, Ko CW, Lee D, DeMichele S. Effect of mono- and diglycerides on the digestion and absorption of lutein in lymph fistula rats. Am J Physiol Gastrointest Liver Physiol 2018; 315:G95-G103. [PMID: 29470144 PMCID: PMC6109709 DOI: 10.1152/ajpgi.00236.2017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 02/16/2018] [Accepted: 02/16/2018] [Indexed: 01/31/2023]
Abstract
Breast milk lutein is better absorbed by infants than lutein delivered in infant formula. Therefore, we wanted to better understand the possible absorption differences of lutein in breast milk vs. that in infant formula by determining its bioavailability after gastric administration and whether the intestinal absorption of lutein can be improved by using new delivery vehicles. Study 1 compared the intestinal uptake,and the lymphatic and portal transport of lutein in conscious lymph fistula rats. Four groups of lymph- and portal vein-cannulated rats ( n = 8-10/group) were randomized to receive via gastric tube increasing doses (10, 20, 40, or 80 mg/kg) of 20% lutein in safflower oil (SO) suspension to assess whether there was a saturable level of lutein that could be absorbed and transported in lymph. Aliquots of hourly portal blood and lymph were taken for lutein and zeaxanthin analyses. The dose-response study showed that 20 mg/kg lutein was the saturable level of lymphatic lutein absorption with no lutein detected in portal circulation at any dosage level tested. Study 2 randomized five groups of lymph fistula rats ( n = 4-9/group) to receive 20 mg/kg lutein from either lutein in SO or lutein in four different mono- and diglyceride oils (MDGs). Gastric infusion of lutein suspended in MDG (20 mg/kg) significantly improved (71-211%, P < 0.05) lymphatic lutein output 2-6 h after lipid feeding vs. lutein in SO. Lymphatic zeaxanthin (10% of the lutein fed mixture) transport in both Study 1 and Study 2 followed that of lutein. We conclude that a mixture of MDGs helps solubilize lutein and facilitate gastrointestinal micelle formation, thus improving lymphatic lutein absorption compared with triglyceride oils. NEW & NOTEWORTHY This paper describes how lutein is digested and absorbed by the gastrointestinal tract by using the conscious lymph fistula rat model. Our dose-response study showed that absorption and lymphatic transport of lutein is a saturable process with no lutein detected in portal circulation at any dosage level tested. Our paper also provides insight into how this process can be improved by modifying the typical lipid mixtures carrying the lutein.
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Affiliation(s)
- Patrick Tso
- Department of Pathology and Laboratory Medicine, Metabolic Disease Institute, University of Cincinnati , Cincinnati, Ohio
| | - Mustafa Vurma
- Discovery and Product Research and Development, Abbott Nutrition, Abbott Laboratories , Columbus, Ohio
| | - Chih-Wei Ko
- Department of Pathology and Laboratory Medicine, Metabolic Disease Institute, University of Cincinnati , Cincinnati, Ohio
| | - Dana Lee
- Department of Pathology and Laboratory Medicine, Metabolic Disease Institute, University of Cincinnati , Cincinnati, Ohio
| | - Stephen DeMichele
- Discovery and Product Research and Development, Abbott Nutrition, Abbott Laboratories , Columbus, Ohio
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23
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Miranda AM, Lasiecka ZM, Xu Y, Neufeld J, Shahriar S, Simoes S, Chan RB, Oliveira TG, Small SA, Di Paolo G. Neuronal lysosomal dysfunction releases exosomes harboring APP C-terminal fragments and unique lipid signatures. Nat Commun 2018; 9:291. [PMID: 29348617 PMCID: PMC5773483 DOI: 10.1038/s41467-017-02533-w] [Citation(s) in RCA: 144] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 12/06/2017] [Indexed: 12/11/2022] Open
Abstract
Defects in endolysosomal and autophagic functions are increasingly viewed as key pathological features of neurodegenerative disorders. A master regulator of these functions is phosphatidylinositol-3-phosphate (PI3P), a phospholipid synthesized primarily by class III PI 3-kinase Vps34. Here we report that disruption of neuronal Vps34 function in vitro and in vivo impairs autophagy, lysosomal degradation as well as lipid metabolism, causing endolysosomal membrane damage. PI3P deficiency also promotes secretion of unique exosomes enriched for undigested lysosomal substrates, including amyloid precursor protein C-terminal fragments (APP-CTFs), specific sphingolipids, and the phospholipid bis(monoacylglycero)phosphate (BMP), which normally resides in the internal vesicles of endolysosomes. Secretion of these exosomes requires neutral sphingomyelinase 2 and sphingolipid synthesis. Our results reveal a homeostatic response counteracting lysosomal dysfunction via secretion of atypical exosomes eliminating lysosomal waste and define exosomal APP-CTFs and BMP as candidate biomarkers for endolysosomal dysfunction associated with neurodegenerative disorders.
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Affiliation(s)
- André M Miranda
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY, 10032, USA
- Taub Institute for Research on Alzheimer's disease and the Aging Brain, Columbia University Medical Center, New York, NY, 10032, USA
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, 4710-057, Portugal
- ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, 4710-057, Portugal
| | - Zofia M Lasiecka
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY, 10032, USA
| | - Yimeng Xu
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY, 10032, USA
| | - Jessi Neufeld
- Taub Institute for Research on Alzheimer's disease and the Aging Brain, Columbia University Medical Center, New York, NY, 10032, USA
- Departments of Neurology, Columbia University Medical Center, New York, NY, 10032, USA
| | - Sanjid Shahriar
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY, 10032, USA
| | - Sabrina Simoes
- Taub Institute for Research on Alzheimer's disease and the Aging Brain, Columbia University Medical Center, New York, NY, 10032, USA
- Departments of Neurology, Columbia University Medical Center, New York, NY, 10032, USA
| | - Robin B Chan
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY, 10032, USA
- Taub Institute for Research on Alzheimer's disease and the Aging Brain, Columbia University Medical Center, New York, NY, 10032, USA
| | - Tiago Gil Oliveira
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, 4710-057, Portugal
- ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, 4710-057, Portugal
| | - Scott A Small
- Taub Institute for Research on Alzheimer's disease and the Aging Brain, Columbia University Medical Center, New York, NY, 10032, USA
- Departments of Neurology, Columbia University Medical Center, New York, NY, 10032, USA
| | - Gilbert Di Paolo
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY, 10032, USA.
- Taub Institute for Research on Alzheimer's disease and the Aging Brain, Columbia University Medical Center, New York, NY, 10032, USA.
- Denali Therapeutics, South San Francisco, CA, 94080, USA.
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Anderson DMG, Ablonczy Z, Koutalos Y, Hanneken AM, Spraggins JM, Calcutt MW, Crouch RK, Caprioli RM, Schey KL. Bis(monoacylglycero)phosphate lipids in the retinal pigment epithelium implicate lysosomal/endosomal dysfunction in a model of Stargardt disease and human retinas. Sci Rep 2017; 7:17352. [PMID: 29229934 PMCID: PMC5725462 DOI: 10.1038/s41598-017-17402-1] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 11/22/2017] [Indexed: 01/10/2023] Open
Abstract
Stargardt disease is a juvenile onset retinal degeneration, associated with elevated levels of lipofuscin and its bis-retinoid components, such as N-retinylidene-N-retinylethanolamine (A2E). However, the pathogenesis of Stargardt is still poorly understood and targeted treatments are not available. Utilizing high spatial and high mass resolution matrix assisted laser desorption ionization (MALDI) imaging mass spectrometry (IMS), we determined alterations of lipid profiles specifically localized to the retinal pigment epithelium (RPE) in Abca4 -/- Stargardt model mice compared to their relevant background strain. Extensive analysis by LC-MS/MS in both positive and negative ion mode was required to accurately confirm the identity of one highly expressed lipid class, bis(monoacylgylercoro)phosphate (BMP) lipids, and to distinguish them from isobaric species. The same BMP lipids were also detected in the RPE of healthy human retina. BMP lipids have been previously associated with the endosomal/lysosomal storage diseases Niemann-Pick and neuronal ceroid lipofuscinosis and have been reported to regulate cholesterol levels in endosomes. These results suggest that perturbations in lipid metabolism associated with late endosomal/lysosomal dysfunction may play a role in the pathogenesis of Stargardt disease and is evidenced in human retinas.
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Affiliation(s)
- David M G Anderson
- Mass Spectrometry Research Center and Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Zsolt Ablonczy
- Department of Ophthalmology, Storm Eye Institute, Medical University of South Carolina, Charleston, SC, USA
- Preclinical Department, Ora Inc, Andover, MA, USA
| | - Yiannis Koutalos
- Department of Ophthalmology, Storm Eye Institute, Medical University of South Carolina, Charleston, SC, USA
| | - Anne M Hanneken
- Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Jeffrey M Spraggins
- Mass Spectrometry Research Center and Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN, USA
- Department of Biochemistry, Vanderbilt University, Nashville, TN, USA
- Department of Chemistry, Nashville, TN, USA
| | - M Wade Calcutt
- Mass Spectrometry Research Center and Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Rosalie K Crouch
- Department of Ophthalmology, Storm Eye Institute, Medical University of South Carolina, Charleston, SC, USA
| | - Richard M Caprioli
- Mass Spectrometry Research Center and Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN, USA
- Department of Biochemistry, Vanderbilt University, Nashville, TN, USA
- Department of Chemistry, Nashville, TN, USA
- Department of Pharmacology and Medicine, Vanderbilt University, Nashville, TN, USA
| | - Kevin L Schey
- Mass Spectrometry Research Center and Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN, USA.
- Department of Biochemistry, Vanderbilt University, Nashville, TN, USA.
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Poursharifi P, Madiraju SRM, Prentki M. Monoacylglycerol signalling and ABHD6 in health and disease. Diabetes Obes Metab 2017; 19 Suppl 1:76-89. [PMID: 28880480 DOI: 10.1111/dom.13008] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 04/24/2017] [Accepted: 05/11/2017] [Indexed: 12/14/2022]
Abstract
Lipid metabolism dysregulation underlies chronic pathologies such as obesity, diabetes and cancer. Besides their role in structure and energy storage, lipids are also important signalling molecules regulating multiple biological functions. Thus, understanding the precise lipid metabolism enzymatic steps that are altered in some pathological conditions is helpful for designing better treatment strategies. Several monoacylglycerol (MAG) species are only recently being recognized as signalling lipid molecules in different tissues. Recent studies indicated the importance of the ubiquitously expressed serine hydrolase α/β-hydrolase domain 6 (ABHD6), which is a MAG hydrolase, in regulating signalling competent MAG in both central and peripheral tissues. The central and peripheral function of the endocannabinoid 2-arachidonoylglycerol, which is a 2-MAG, and its breakdown by both ABHD6 and classical MAG lipase has been well documented. ABHD6 and its substrate MAG appear to be involved in the regulation of various physiological and pathological processes including insulin secretion, adipose browning, food intake, neurotransmission, autoimmune disorders, neurological and metabolic diseases as well as cancer. Diverse cellular targets such as mammalian unc13-1 (Munc13-1), PPARs, GPR119 and CB1/2 receptors, for MAG-mediated signalling processes have been proposed in different cell types. The purpose of this review is to provide a comprehensive summary of the current state of knowledge regarding ABHD6/MAG signalling and its possible therapeutic implications.
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Affiliation(s)
- Pegah Poursharifi
- Departments of Nutrition, Biochemistry and Molecular Medicine, University of Montreal, and Montreal Diabetes Research Center, CRCHUM, Montreal, Canada
| | - Sri Ramachandra Murthy Madiraju
- Departments of Nutrition, Biochemistry and Molecular Medicine, University of Montreal, and Montreal Diabetes Research Center, CRCHUM, Montreal, Canada
| | - Marc Prentki
- Departments of Nutrition, Biochemistry and Molecular Medicine, University of Montreal, and Montreal Diabetes Research Center, CRCHUM, Montreal, Canada
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Bravo A, Brands M, Wewer V, Dörmann P, Harrison MJ. Arbuscular mycorrhiza-specific enzymes FatM and RAM2 fine-tune lipid biosynthesis to promote development of arbuscular mycorrhiza. New Phytol 2017; 214:1631-1645. [PMID: 28380681 DOI: 10.1111/nph.14533] [Citation(s) in RCA: 171] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Accepted: 02/16/2017] [Indexed: 05/04/2023]
Abstract
During arbuscular mycorrhizal symbiosis (AMS), considerable amounts of lipids are generated, modified and moved within the cell to accommodate the fungus in the root, and it has also been suggested that lipids are delivered to the fungus. To determine the mechanisms by which root cells redirect lipid biosynthesis during AMS we analyzed the roles of two lipid biosynthetic enzymes (FatM and RAM2) and an ABC transporter (STR) that are required for symbiosis and conserved uniquely in plants that engage in AMS. Complementation analyses indicated that the biochemical function of FatM overlaps with that of other Fat thioesterases, in particular FatB. The essential role of FatM in AMS was a consequence of timing and magnitude of its expression. Lipid profiles of fatm and ram2 suggested that FatM increases the outflow of 16:0 fatty acids from the plastid, for subsequent use by RAM2 to produce 16:0 β-monoacylglycerol. Thus, during AMS, high-level, specific expression of key lipid biosynthetic enzymes located in the plastid and the endoplasmic reticulum enables the root cell to fine-tune lipid biosynthesis to increase the production of β-monoacylglycerols. We propose a model in which β-monoacylglycerols, or a derivative thereof, are exported out of the root cell across the periarbuscular membrane for ultimate use by the fungus.
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Affiliation(s)
- Armando Bravo
- Boyce Thompson Institute, 533 Tower Road, Ithaca, NY, 14853, USA
| | - Mathias Brands
- Institute of Molecular Physiology and Biotechnology of Plants, University of Bonn, Karlrobert-Kreiten-Strasse 13, 53115, Bonn, Germany
| | - Vera Wewer
- Institute of Molecular Physiology and Biotechnology of Plants, University of Bonn, Karlrobert-Kreiten-Strasse 13, 53115, Bonn, Germany
| | - Peter Dörmann
- Institute of Molecular Physiology and Biotechnology of Plants, University of Bonn, Karlrobert-Kreiten-Strasse 13, 53115, Bonn, Germany
| | - Maria J Harrison
- Boyce Thompson Institute, 533 Tower Road, Ithaca, NY, 14853, USA
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Casteras S, Abdul-Wahed A, Soty M, Vulin F, Guillou H, Campana M, Le Stunff H, Pirola L, Rajas F, Mithieux G, Gautier-Stein A. The suppression of hepatic glucose production improves metabolism and insulin sensitivity in subcutaneous adipose tissue in mice. Diabetologia 2016; 59:2645-2653. [PMID: 27631137 DOI: 10.1007/s00125-016-4097-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 08/05/2016] [Indexed: 12/13/2022]
Abstract
AIMS/HYPOTHESIS Despite the strong correlation between non-alcoholic fatty liver disease and insulin resistance, hepatic steatosis is associated with greater whole-body insulin sensitivity in several models. We previously reported that the inhibition of hepatic glucose production (HGP) protects against the development of obesity and diabetes despite severe steatosis, thanks to the secretion of specific hepatokines such as fibroblast growth factor 21 (FGF21) and angiopoietin-related growth factor. In this work, we focused on adipose tissue to assess whether liver metabolic fluxes might, by interorgan communication, control insulin signalling in lean animals. METHODS Insulin signalling was studied in the adipose tissue of mice lacking the catalytic subunit of glucose 6-phosphatase, the key enzyme in endogenous glucose production, in the liver (L-G6pc -/- mice). Morphological and metabolic changes in the adipose tissues were characterised by histological analyses, gene expression and protein content. RESULTS Mice lacking HGP exhibited improved insulin sensitivity of the phosphoinositide 3-kinase/Akt pathway in the subcutaneous adipose tissue associated with a browning of adipocytes. The suppression of HGP increased FGF21 levels in lean animals, and increased FGF21 was responsible for the metabolic changes in the subcutaneous adipose tissue but not for its greater insulin sensitivity. The latter might be linked to an increase in the ratio of monounsaturated to saturated fatty acids released by the liver. CONCLUSIONS Our work provides evidence that HGP controls subcutaneous adipose tissue browning and insulin sensitivity through two pathways: the release of beneficial hepatokines and changes in hepatic fatty acids profile.
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Affiliation(s)
- Sylvie Casteras
- Inserm U1213, Faculté Laennec, 7 rue Guillaume Paradin, 69372, Lyon cedex 08, France
- Université de Lyon, Lyon, France
- Université Lyon1, Villeurbanne, France
| | - Aya Abdul-Wahed
- Inserm U1213, Faculté Laennec, 7 rue Guillaume Paradin, 69372, Lyon cedex 08, France
- Université de Lyon, Lyon, France
- Université Lyon1, Villeurbanne, France
| | - Maud Soty
- Inserm U1213, Faculté Laennec, 7 rue Guillaume Paradin, 69372, Lyon cedex 08, France
- Université de Lyon, Lyon, France
- Université Lyon1, Villeurbanne, France
| | - Fanny Vulin
- Inserm U1213, Faculté Laennec, 7 rue Guillaume Paradin, 69372, Lyon cedex 08, France
- Université de Lyon, Lyon, France
- Université Lyon1, Villeurbanne, France
| | - Hervé Guillou
- INRA, ToxAlim UMR1331 (Research Center in Food Toxicology), Toulouse, France
| | - Mélanie Campana
- Unité Biologie Fonctionnelle et Adaptative -UMR CNRS 8251, Université Paris- Diderot (7), Paris, France
- I2BC - UMR 9198 Université Paris Sud, Gif sur Yvette, France
| | - Hervé Le Stunff
- Unité Biologie Fonctionnelle et Adaptative -UMR CNRS 8251, Université Paris- Diderot (7), Paris, France
- I2BC - UMR 9198 Université Paris Sud, Gif sur Yvette, France
| | - Luciano Pirola
- Université de Lyon, Lyon, France
- Université Lyon1, Villeurbanne, France
- Laboratoire de Recherche en Cardiovasculaire, Métabolisme, Diabétologie et Nutrition, CarMeN, Oullins, France
| | - Fabienne Rajas
- Inserm U1213, Faculté Laennec, 7 rue Guillaume Paradin, 69372, Lyon cedex 08, France
- Université de Lyon, Lyon, France
- Université Lyon1, Villeurbanne, France
| | - Gilles Mithieux
- Inserm U1213, Faculté Laennec, 7 rue Guillaume Paradin, 69372, Lyon cedex 08, France
- Université de Lyon, Lyon, France
- Université Lyon1, Villeurbanne, France
| | - Amandine Gautier-Stein
- Inserm U1213, Faculté Laennec, 7 rue Guillaume Paradin, 69372, Lyon cedex 08, France.
- Université de Lyon, Lyon, France.
- Université Lyon1, Villeurbanne, France.
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28
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He Y, Li J, Kodali S, Chen B, Guo Z. The near-ideal catalytic property of Candida antarctica lipase A to highly concentrate n-3 polyunsaturated fatty acids in monoacylglycerols via one-step ethanolysis of triacylglycerols. Bioresour Technol 2016; 219:466-478. [PMID: 27521783 DOI: 10.1016/j.biortech.2016.08.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 08/01/2016] [Accepted: 08/03/2016] [Indexed: 06/06/2023]
Abstract
Declining quantity/quality of available n-3 polyunsaturated fatty acids (n-3 PUFAs) resources demand innovative technology to concentrate n-3 PUFAs from low quality oils into value-added products/health-beneficial ingredients rich in n-3 PUFAs. This work proposed the catalytic property and specificity of an ideal enzyme required to tackle this task and identified Candida antarctica lipase A (CAL-A) is such a near-ideal enzyme in practice, which concentrates n-3 PUFAs from 25% to 27% in oils to a theoretically closer value 90% in monoacylglycerols (MAGs) via one-step enzymatic ethanolysis. Non-regiospecificity and high non-n-3 PUFAs preference of CAL-A are the catalytic feature to selectively cleave non-n-3 PUFAs in all 3 positions of triacylglycerols (TAGs); while high ethanol/TAGs ratio, low operation temperature and high tolerance to polar ethanol are essential conditions beyond biocatalyst itself. C-13 Nuclear magnetic resonance ((13)C NMR) analysis and competitive factor estimation verified the hypothesis and confirmed the plausible suggestion of catalytic mechanism of CAL-A.
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Affiliation(s)
- Yongjin He
- College of Life Science, Fujian Normal University, Fuzhou 350117, China; Department of Engineering, Aarhus University, Gustav Wieds Vej 10, 8000 Aarhus C, Denmark
| | - Jingbo Li
- Department of Engineering, Aarhus University, Gustav Wieds Vej 10, 8000 Aarhus C, Denmark
| | - Sitharam Kodali
- Department of Engineering, Aarhus University, Gustav Wieds Vej 10, 8000 Aarhus C, Denmark
| | - Bilian Chen
- College of Life Science, Fujian Normal University, Fuzhou 350117, China; Engineering Research Center of Industrial Microbiology of Ministry of Education, Fujian Normal University, Fuzhou 350117, China.
| | - Zheng Guo
- Department of Engineering, Aarhus University, Gustav Wieds Vej 10, 8000 Aarhus C, Denmark
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Abstract
Diacylglycerol lipases (DGLs) mainly catalyze "on-demand" biosynthesis of bioactive monoacylglycerols (MAGs) with different long fatty acyl chains, including 2-arachidonoylglycerol (2-AG), 2-linoleoylglycerol (2-LG), 2-oleoylglycerol (2-OG) and 2-palmitoylglycerol (2-PG). Enzymatic characterization of DGLs, their expression and distribution, and functional features has been elucidated from microorganisms to mammals in some extent. In mammals, biosynthesis, degradation and metabolism of these bioactive lipids intertwine and form a complicated biochemical pathway to affect the mammal neuromodulation of central nervous system and also other physiological processes in most peripheral organs and non-nervous tissue cells, and yet we still do not know if the neuromodulatory role of mammal DGL and MAGs is similar to invertebrates. Tracing the evolutionary history of DGLs from microorganisms to vertebrates will be an essential method to infer DGL and MAG research in organisms. In this review, we give an exhaustive explanation of the ancestral origin, divergence and evolutionary pattern through systemic searching of DGL orthologs in different species. Finally, we also summarize our recent work on the structural and functional studies of DGL in order to explore usage of DGLs in industry and the development of inhibitors for clinical intervention.
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Affiliation(s)
- Dongjuan Yuan
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, People's Republic of China; College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, People's Republic of China
| | - Zhongdao Wu
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, People's Republic of China
| | - Yonghua Wang
- College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, People's Republic of China.
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Sagalowicz L, Moccand C, Davidek T, Ghanbari R, Martiel I, Negrini R, Mezzenga R, Leser ME, Blank I, Michel M. Lipid self-assembled structures for reactivity control in food. Philos Trans A Math Phys Eng Sci 2016; 374:rsta.2015.0136. [PMID: 27298441 DOI: 10.1098/rsta.2015.0136] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/08/2016] [Indexed: 06/06/2023]
Abstract
Lipid self-assembled structures (SASs) have recently gained considerable interest for their potential applications, especially for sustained nutrient release and protein crystallization. An additional property, which is underexploited, is their ability to control chemical reactions in food products. Here, we concentrate on SASs formed by phospholipids (PLs) and monoglycerides (MGs), those compounds being the most natural surfactants and therefore, the best compatible with food products, in view of providing new functionalities through the formation of SASs. In this work, the phase behaviour of these amphiphiles when mixed with oil and water is described and compared. Subsequently, we address the influence of these structures to the oxidation and Maillard-type reactions. Finally, we show that SASs formed by MGs can strongly increase the yield of key aroma impact compounds generated by Maillard-type reactions when compared with the reaction performed in aqueous precursor solutions. Various SASs are compared. In particular, addition of oil to a reversed bicontinuous structure formed by MG leads to a reversed microemulsion, which, considering its low viscosity, is particularly suitable for food products and act as a very efficient reactor system. The influence of oil and precursors on phase behaviour is discussed and related to the efficiency of the Maillard reactions.This article is part of the themed issue 'Soft interfacial materials: from fundamentals to formulation'.
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Affiliation(s)
- L Sagalowicz
- Nestlé Research Center, Vers-Chez-Les-Blanc, Lausanne 26 1000, Switzerland
| | - C Moccand
- Nestlé Research Center, Vers-Chez-Les-Blanc, Lausanne 26 1000, Switzerland
| | - T Davidek
- Nestlé PTC Orbe, Rte de Chavornay 3, Orbe 1350, Switzerland
| | - R Ghanbari
- Department of Health Science and Technology, ETH Zürich, Switzerland
| | - I Martiel
- Department of Health Science and Technology, ETH Zürich, Switzerland
| | - R Negrini
- Department of Health Science and Technology, ETH Zürich, Switzerland
| | - R Mezzenga
- Department of Health Science and Technology, ETH Zürich, Switzerland
| | - M E Leser
- Nestlé Research Center, Vers-Chez-Les-Blanc, Lausanne 26 1000, Switzerland
| | - I Blank
- Nestlé Research Center, Vers-Chez-Les-Blanc, Lausanne 26 1000, Switzerland
| | - M Michel
- Nestlé Research Center, Vers-Chez-Les-Blanc, Lausanne 26 1000, Switzerland
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Gómez-Torres MJ, García EM, Guerrero J, Medina S, Izquierdo-Rico MJ, Gil-Izquierdo Á, Orduna J, Savirón M, González-Brusi L, Ten J, Bernabeu R, Avilés M. Metabolites involved in cellular communication among human cumulus-oocyte-complex and sperm during in vitro fertilization. Reprod Biol Endocrinol 2015; 13:123. [PMID: 26553294 PMCID: PMC4640411 DOI: 10.1186/s12958-015-0118-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 10/22/2015] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Fertilization is a key physiological process for the preservation of the species. Consequently, different mechanisms affecting the sperm and the oocyte have been developed to ensure a successful fertilization. Thus, sperm acrosome reaction is necessary for the egg coat penetration and sperm-oolema fusion. Several molecules are able to induce the sperm acrosome reaction; however, this process should be produced coordinately in time and in the space to allow the success of fertilization between gametes. The goal of this study was to analyze the metabolites secreted by cumulus-oocyte-complex (COC) to find out new components that could contribute to the induction of the human sperm acrosome reaction and other physiological processes at the time of gamete interaction and fertilization. METHODS For the metabolomic analysis, eighteen aliquots of medium were used in each group, containing: a) only COC before insemination and after 3 h of incubation; b) COC and capacitated spermatozoa after insemination and incubated for 16-20 hours; c) only capacitated sperm after 16-20 h in culture and d) only fertilization medium as control. Six patients undergoing assisted reproduction whose male partners provided normozoospermic samples were included in the study. Seventy-two COC were inseminated. RESULTS The metabolites identified were monoacylglycerol (MAG), lysophosphatidylcholine (LPC) and phytosphingosine (PHS). Analysis by PCR and in silico of the gene expression strongly suggests that the cumulus cells contribute to the formation of the PHS and LPC. CONCLUSIONS LPC and PHS are secreted by cumulus cells during in vitro fertilization and they could be involved in the induction of human acrosome reaction (AR). The identification of new molecules with a paracrine effect on oocytes, cumulus cells and spermatozoa will provide a better understanding of gamete interaction.
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Affiliation(s)
- María José Gómez-Torres
- Department of Biotechnology, University of Alicante, 99, Carretera de San Vicente s/n, Alicante, 03016, Spain.
| | - Eva María García
- Department of Biotechnology, University of Alicante, 99, Carretera de San Vicente s/n, Alicante, 03016, Spain
- Instituto Bernabeu of Fertility and Gynecology, Alicante, 03016, Spain
| | - Jaime Guerrero
- Instituto Bernabeu of Fertility and Gynecology, Alicante, 03016, Spain
| | - Sonia Medina
- Research Group on Quality, Safety and Bioactivity of Plant Foods, Food Science and Technology Department, CEBAS-CSIC, Espinardo (Murcia), Spain
| | - María José Izquierdo-Rico
- Department of Cell Biology and Histology, Faculty of Medicine, University of Murcia, Campus Mare Nostrum, Espinardo 30100 and IMIB, Murcia, Spain
| | - Ángel Gil-Izquierdo
- Research Group on Quality, Safety and Bioactivity of Plant Foods, Food Science and Technology Department, CEBAS-CSIC, Espinardo (Murcia), Spain
| | - Jesús Orduna
- Institute of Materials Science of Aragon, CSIC-University of Zaragoza, 50009, Zaragoza, Spain
| | - María Savirón
- Institute of Materials Science of Aragon, CSIC-University of Zaragoza, 50009, Zaragoza, Spain
| | - Leopoldo González-Brusi
- Department of Cell Biology and Histology, Faculty of Medicine, University of Murcia, Campus Mare Nostrum, Espinardo 30100 and IMIB, Murcia, Spain
| | - Jorge Ten
- Department of Biotechnology, University of Alicante, 99, Carretera de San Vicente s/n, Alicante, 03016, Spain
- Instituto Bernabeu of Fertility and Gynecology, Alicante, 03016, Spain
| | - Rafael Bernabeu
- Instituto Bernabeu of Fertility and Gynecology, Alicante, 03016, Spain
| | - Manuel Avilés
- Department of Cell Biology and Histology, Faculty of Medicine, University of Murcia, Campus Mare Nostrum, Espinardo 30100 and IMIB, Murcia, Spain
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Kleberg K, Nielsen LL, Stuhr-Hansen N, Nielsen J, Hansen HS. Evaluation of the immediate vascular stability of lipoprotein lipase-generated 2-monoacylglycerol in mice. Biofactors 2014; 40:596-602. [PMID: 25359532 DOI: 10.1002/biof.1189] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Accepted: 10/14/2014] [Indexed: 11/07/2022]
Abstract
2-Monoacylglycerols are gaining increasing interest as signaling lipids, beyond endocannabinoids, for example, as ligands for the receptor GPR119 and as mediators of insulin secretion. In the vascular system, they are formed by the action of lipoprotein lipase (LPL); however, their further disposition is unclear. Assuming similar affinity for uptake and incorporation into tissues of 2-oleoylglycerol and 2-oleylglyceryl ether, we have synthesized a (3)H-labeled 2-ether analog of triolein (labeled in alkyl group) and compared its disposition with (14)C-labeled triolein (labeled in glycerol) 20 min after intravenous coadministration in a ratio of 1:1 to mice. We found that peripheral tissues and the liver in particular are able to take up 2-monoacylglycerols as seen from (3)H uptake. In muscle and adipose tissue, 2-monoacylglycerols are probably further hydrolyzed as seen by an increased (3)H/(14)C ratio, whereas in the liver and the heart, data suggest that they are also subjected to re-esterification to triacylglycerol, as seen by an unchanged (3)H/(14)C ratio in the lipid fraction of the tissues. Our findings suggest that LPL-generated 2-monoacylglycerol is likely to be stable in the vascular system and thus have a potential to circulate or at least exert effects in tissues where it may be locally produced.
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Affiliation(s)
- Karen Kleberg
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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Zygmunt PM, Ermund A, Movahed P, Andersson DA, Simonsen C, Jönsson BAG, Blomgren A, Birnir B, Bevan S, Eschalier A, Mallet C, Gomis A, Högestätt ED. Monoacylglycerols activate TRPV1--a link between phospholipase C and TRPV1. PLoS One 2013; 8:e81618. [PMID: 24312564 PMCID: PMC3847081 DOI: 10.1371/journal.pone.0081618] [Citation(s) in RCA: 115] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Accepted: 10/25/2013] [Indexed: 01/17/2023] Open
Abstract
Phospholipase C-mediated hydrolysis of phosphatidylinositol 4,5-bisphosphate generates diacylglycerol, inositol 1,4,5-trisphosphate and protons, all of which can regulate TRPV1 activity via different mechanisms. Here we explored the possibility that the diacylglycerol metabolites 2-arachidonoylglycerol and 1-arachidonoylglycerol, and not metabolites of these monoacylglycerols, activate TRPV1 and contribute to this signaling cascade. 2-Arachidonoylglycerol and 1-arachidonoylglycerol activated native TRPV1 on vascular sensory nerve fibers and heterologously expressed TRPV1 in whole cells and inside-out membrane patches. The monoacylglycerol lipase inhibitors methylarachidonoyl-fluorophosphonate and JZL184 prevented the metabolism of deuterium-labeled 2-arachidonoylglycerol and deuterium-labeled 1-arachidonoylglycerol in arterial homogenates, and enhanced TRPV1-mediated vasodilator responses to both monoacylglycerols. In mesenteric arteries from TRPV1 knock-out mice, vasodilator responses to 2-arachidonoylglycerol were minor. Bradykinin and adenosine triphosphate, ligands of phospholipase C-coupled membrane receptors, increased the content of 2-arachidonoylglycerol in dorsal root ganglia. In HEK293 cells expressing the phospholipase C-coupled histamine H1 receptor, exposure to histamine stimulated the formation of 2-AG, and this effect was augmented in the presence of JZL184. These effects were prevented by the diacylglycerol lipase inhibitor tetrahydrolipstatin. Histamine induced large whole cell currents in HEK293 cells co-expressing TRPV1 and the histamine H1 receptor, and the TRPV1 antagonist capsazepine abolished these currents. JZL184 increased the histamine-induced currents and tetrahydrolipstatin prevented this effect. The calcineurin inhibitor ciclosporin and the endogenous "entourage" compound palmitoylethanolamide potentiated the vasodilator response to 2-arachidonoylglycerol, disclosing TRPV1 activation of this monoacylglycerol at nanomolar concentrations. Furthermore, intracerebroventricular injection of JZL184 produced TRPV1-dependent antinociception in the mouse formalin test. Our results show that intact 2-arachidonoylglycerol and 1-arachidonoylglycerol are endogenous TRPV1 activators, contributing to phospholipase C-dependent TRPV1 channel activation and TRPV1-mediated antinociceptive signaling in the brain.
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Affiliation(s)
- Peter M. Zygmunt
- Department of Laboratory Medicine, Lund University, Lund, Sweden
- Lund University Pain Research Centre, Lund University, Lund, Sweden
- * E-mail: (PMZ); (EDH)
| | - Anna Ermund
- Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Pouya Movahed
- Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - David A. Andersson
- Wolfson Centre for Age-Related Diseases, King's College London, London, United Kingdom
| | | | - Bo A. G. Jönsson
- Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Anders Blomgren
- Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Bryndis Birnir
- Department of Neuroscience, Uppsala University, Uppsala, Sweden
| | - Stuart Bevan
- Wolfson Centre for Age-Related Diseases, King's College London, London, United Kingdom
| | - Alain Eschalier
- Clermont Université, Université d'Auvergne, Pharmacologie Fondamentale et Clinique de la Douleur, Laboratoire de Pharmacologie, Facultés de Médecine/Pharmacie, Clermont-Ferrand, France
- Inserm, U1107 Neuro-Dol, Clermont-Ferrand, France
- CHU Clermont-Ferrand, Service de Pharmacologie, Hôpital G. Montpied, Clermont-Ferrand, France
| | - Christophe Mallet
- Clermont Université, Université d'Auvergne, Pharmacologie Fondamentale et Clinique de la Douleur, Laboratoire de Pharmacologie, Facultés de Médecine/Pharmacie, Clermont-Ferrand, France
- Inserm, U1107 Neuro-Dol, Clermont-Ferrand, France
| | - Ana Gomis
- Instituto de Neurociencias, Universidad Miguel Hernández-Consejo Superior de Investigaciones Científicas, Sant Joan d'Alacant, Spain
| | - Edward D. Högestätt
- Department of Laboratory Medicine, Lund University, Lund, Sweden
- Lund University Pain Research Centre, Lund University, Lund, Sweden
- * E-mail: (PMZ); (EDH)
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Brown MV, Compton SA, Milburn MV, Lawton KA, Cheatham B. Metabolomic signatures in lipid-loaded HepaRGs reveal pathways involved in steatotic progression. Obesity (Silver Spring) 2013; 21:E561-70. [PMID: 23512965 PMCID: PMC3689848 DOI: 10.1002/oby.20440] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Accepted: 02/21/2013] [Indexed: 12/30/2022]
Abstract
OBJECTIVES A spectrum of disorders including simple steatosis, nonalcoholic steatohepatitis, fibrosis, and cirrhosis is described by nonalcoholic fatty liver disease (NAFLD). With the increased prevalence of obesity, and consequently NAFLD, there is a need for novel therapeutics in this area. To facilitate this effort, a cellular model of hepatic steatosis was developed using HepaRG cells and the resulting biochemical alterations were determined. DESIGN AND METHODS Using global metabolomic profiling, by means of a novel metabolite extraction procedure, the metabolic profiles in response to the saturated fatty acid palmitate, and a mixture of saturated and unsaturated fatty acids, palmitate and oleate (1:2) were examined. RESULTS We observed elevated levels of the branched chain amino acids, tricarboxylic acid cycle intermediates, sphingosine and acylcarnitines, and reduced levels of carnitine in the steatotic HepaRG model with both palmitate and palmitate:oleate treatments. In addition, elevated levels of diacylglycerols and monoacylglycerols as well as altered bile acid metabolism were selectively displayed by palmitate-induced steatotic cells. CONCLUSIONS Biochemical changes in pathways important in the transition to hepatic steatosis including insulin resistance, altered mitochondrial metabolism, and oxidative stress are revealed by this global metabolomic approach. Moreover, the utility of this in vitro model for investigating the mechanisms of steatotic progression, insulin resistance, and lipotoxicity in NAFLD was demonstrated.
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Morin C, Rousseau É, Fortin S. Anti-proliferative effects of a new docosapentaenoic acid monoacylglyceride in colorectal carcinoma cells. Prostaglandins Leukot Essent Fatty Acids 2013; 89:203-13. [PMID: 23932824 DOI: 10.1016/j.plefa.2013.07.004] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Revised: 07/11/2013] [Accepted: 07/16/2013] [Indexed: 11/16/2022]
Abstract
N-3 polyunsaturated fatty acids (n-3 PUFAs) have been shown to inhibit the induction and progression of many tumor types. However, the anticancer effect of n-3 PUFA monoglyceride on colorectal cancer has yet to be assessed. The aim of the present study was to determine the anti-tumorigenic effects of docosahexaenoic acid monoglyceride (MAG-DHA), eicosapentaenoic acid monoglyceride (MAG-EPA) and docosapentaenoic acid (22:5n-3) monoglyceride (MAG-DPA) in colorectal carcinoma cells. Our results demonstrate that MAG-DHA, MAG-EPA and MAG-DPA all decreased cell proliferation and induced apoptosis in HCT116 cells, with MAG-DPA having the higher anti-proliferative and pro-apoptotic effects in vitro. In a HCT116 xenograft mouse model, oral administration of MAG-DPA significantly inhibited tumor growth. Furthermore, MAG-DPA treatments decreased NFκB activation leading to a reduction in Bcl-2, CyclinD1, c-myc, COX-2, MMP9 and VEGF expression levels in tumor tissue sections. Altogether, these data provide new evidence regarding the mode of action of MAG-DPA in colorectal cancer cells.
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Affiliation(s)
- Caroline Morin
- SCF Pharma, Ste-Luce, QC, Canada G0K 1P0; Department of Physiology and Biophysics, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada J1H 5N4.
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Tortoriello G, Rhodes BP, Takacs SM, Stuart JM, Basnet A, Raboune S, Widlanski TS, Doherty P, Harkany T, Bradshaw HB. Targeted lipidomics in Drosophila melanogaster identifies novel 2-monoacylglycerols and N-acyl amides. PLoS One 2013; 8:e67865. [PMID: 23874457 PMCID: PMC3708943 DOI: 10.1371/journal.pone.0067865] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Accepted: 05/28/2013] [Indexed: 11/19/2022] Open
Abstract
Lipid metabolism is critical to coordinate organ development and physiology in response to tissue-autonomous signals and environmental cues. Changes to the availability and signaling of lipid mediators can limit competitiveness, adaptation to environmental stressors, and augment pathological processes. Two classes of lipids, the N-acyl amides and the 2-acyl glycerols, have emerged as important signaling molecules in a wide range of species with important signaling properties, though most of what is known about their cellular functions is from mammalian models. Therefore, expanding available knowledge on the repertoire of these lipids in invertebrates will provide additional avenues of research aimed at elucidating biosynthetic, metabolic, and signaling properties of these molecules. Drosophila melanogaster is a commonly used organism to study intercellular communication, including the functions of bioactive lipids. However, limited information is available on the molecular identity of lipids with putative biological activities in Drosophila. Here, we used a targeted lipidomics approach to identify putative signaling lipids in third instar Drosophila larvae, possessing particularly large lipid mass in their fat body. We identified 2-linoleoyl glycerol, 2-oleoyl glycerol, and 45 N-acyl amides in larval tissues, and validated our findings by the comparative analysis of Oregon-RS, Canton-S and w1118 strains. Data here suggest that Drosophila represent another model system to use for the study of 2-acyl glycerol and N-acyl amide signaling.
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Affiliation(s)
- Giuseppe Tortoriello
- Division of Molecular Neurobiology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Brandon P. Rhodes
- Psychological and Brain Sciences, Indiana University, Bloomington, Indiana, United States of America
| | - Sara M. Takacs
- Psychological and Brain Sciences, Indiana University, Bloomington, Indiana, United States of America
| | - Jordyn M. Stuart
- Psychological and Brain Sciences, Indiana University, Bloomington, Indiana, United States of America
| | - Arjun Basnet
- Department of Chemistry, Indiana University, Bloomington, Indiana, United States of America
| | - Siham Raboune
- Psychological and Brain Sciences, Indiana University, Bloomington, Indiana, United States of America
| | - Theodore S. Widlanski
- Department of Chemistry, Indiana University, Bloomington, Indiana, United States of America
| | - Patrick Doherty
- Wolfson Centre for Ageing-Related Diseases, King’s College London, London, United Kingdom
| | - Tibor Harkany
- Division of Molecular Neurobiology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
- European Neuroscience Institute, University of Aberdeen, Aberdeen, United Kingdom
| | - Heather B. Bradshaw
- Psychological and Brain Sciences, Indiana University, Bloomington, Indiana, United States of America
- * E-mail:
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Pascual AC, Gaveglio VL, Giusto NM, Pasquaré SJ. Aging modifies the enzymatic activities involved in 2-arachidonoylglycerol metabolism. Biofactors 2013; 39:209-20. [PMID: 23281018 DOI: 10.1002/biof.1055] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Accepted: 09/08/2012] [Indexed: 12/17/2022]
Abstract
One of the principal monoacylglycerol (MAG) species in animal tissues is 2-arachidonoylglycerol (2-AG), and the diacylglycerol lipase (DAGL) pathway is the most important 2-AG biosynthetic pathway proposed to date. Lysophosphatidate phosphatase (LPAase) activity is part of another 2-AG-forming pathway in which monoacylglycerol lipase (MAGL) is the major degrading enzyme. The purpose of this study was to analyze the manner in which DAGL, LPAase, and MAGL enzymes are modified in the central nervous system (CNS) during aging. To this end, diacylglycerols (DAGs) and MAGs of different composition were used as substrates of DAGL and MAGL, respectively. All enzymatic activities were evaluated in membrane and soluble fractions as well as in synaptic terminals from the cerebral cortex (CC) of adult and aged rats. Results related to 2-AG metabolism show that aging: (a) decreases DAGL-α expression in the membrane fraction whereas in synaptosomes it increases DAGL-β and decreases MAGL expression; (b) decreases LPAase activity in both membrane and soluble fractions; (c) decreases DAGL and stimulates LPAase activities in CC synaptic terminals; (d) stimulates membrane-associated MAGL-coupled DAGL activity; and (e) stimulates MAGL activity in CC synaptosomes. Our results also reveal that during aging the net balance between the enzymatic activities involved in 2-AG synthesis and breakdown is low availability of 2-AG in CC membrane fractions and synaptic terminals. Taken together, our results lead us to conclude that these enzymes play crucial roles in the regulation of 2-AG tissue levels during aging.
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Affiliation(s)
- Ana C Pascual
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Universidad Nacional del Sur and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 8000 Bahía Blanca, Argentina
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Vijayaraj P, Jashal CB, Vijayakumar A, Rani SH, Venkata Rao D, Rajasekharan R. A bifunctional enzyme that has both monoacylglycerol acyltransferase and acyl hydrolase activities. Plant Physiol 2012; 160:667-83. [PMID: 22915575 PMCID: PMC3461547 DOI: 10.1104/pp.112.202135] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2012] [Accepted: 08/16/2012] [Indexed: 05/23/2023]
Abstract
Monoacylglycerol acyltransferase (MGAT) catalyzes the synthesis of diacylglycerol, the precursor of triacylglycerol biosynthesis and an important signaling molecule. Here, we describe the isolation and characterization of the peanut (Arachis hypogaea) MGAT gene. The soluble enzyme utilizes invariant histidine-62 and aspartate-67 residues of the acyltransferase motif for its MGAT activity. A sequence analysis revealed the presence of a hydrolase (GXSXG) motif, and enzyme assays revealed the presence of monoacylglycerol (MAG) and lysophosphatidylcholine (LPC) hydrolytic activities, indicating the bifunctional nature of the enzyme. The overexpression of the MGAT gene in yeast (Saccharomyces cerevisiae) caused an increase in triacylglycerol accumulation. Similar to the peanut MGAT, the Arabidopsis (Arabidopsis thaliana) homolog (At1g52760) also exhibited both acyltransferase and hydrolase activities. Interestingly, the yeast homolog lacks the conserved HX(4)D motif, and it is deficient in the acyltransferase function but exhibits MAG and LPC hydrolase activities. This study demonstrates the presence of a soluble MGAT/hydrolase in plants. The predicted three-dimensional homology modeling and substrate docking suggested the presence of two separate substrate (MAG and LPC)-binding sites in a single polypeptide. Our study describes a soluble bifunctional enzyme that has both MGAT and hydrolase functions.
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Rengachari S, Bezerra GA, Riegler-Berket L, Gruber CC, Sturm C, Taschler U, Boeszoermenyi A, Dreveny I, Zimmermann R, Gruber K, Oberer M. The structure of monoacylglycerol lipase from Bacillus sp. H257 reveals unexpected conservation of the cap architecture between bacterial and human enzymes. Biochim Biophys Acta 2012; 1821:1012-21. [PMID: 22561231 PMCID: PMC3790968 DOI: 10.1016/j.bbalip.2012.04.006] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Revised: 04/18/2012] [Accepted: 04/20/2012] [Indexed: 11/20/2022]
Abstract
Monoacylglycerol lipases (MGLs) catalyse the hydrolysis of monoacylglycerol into free fatty acid and glycerol. MGLs have been identified throughout all genera of life and have adopted different substrate specificities depending on their physiological role. In humans, MGL plays an integral part in lipid metabolism affecting energy homeostasis, signalling processes and cancer cell progression. In bacteria, MGLs degrade short-chain monoacylglycerols which are otherwise toxic to the organism. We report the crystal structures of MGL from the bacterium Bacillus sp. H257 (bMGL) in its free form at 1.2Å and in complex with phenylmethylsulfonyl fluoride at 1.8Å resolution. In both structures, bMGL adopts an α/β hydrolase fold with a cap in an open conformation. Access to the active site residues, which were unambiguously identified from the protein structure, is facilitated by two different channels. The larger channel constitutes the highly hydrophobic substrate binding pocket with enough room to accommodate monoacylglycerol. The other channel is rather small and resembles the proposed glycerol exit hole in human MGL. Molecular dynamics simulation of bMGL yielded open and closed states of the entrance channel and the glycerol exit hole. Despite differences in the number of residues, secondary structure elements, and low sequence identity in the cap region, this first structure of a bacterial MGL reveals striking structural conservation of the overall cap architecture in comparison with human MGL. Thus it provides insight into the structural conservation of the cap amongst MGLs throughout evolution and provides a framework for rationalising substrate specificities in each organism.
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Affiliation(s)
| | - Gustavo A. Bezerra
- Institute of Molecular Biosciences, University of Graz, A‐8010 Graz, Austria
| | - Lina Riegler-Berket
- Institute of Molecular Biosciences, University of Graz, A‐8010 Graz, Austria
| | | | - Christian Sturm
- Institute of Molecular Biosciences, University of Graz, A‐8010 Graz, Austria
| | - Ulrike Taschler
- Institute of Molecular Biosciences, University of Graz, A‐8010 Graz, Austria
| | | | - Ingrid Dreveny
- School of Pharmacy, University of Nottingham, NG7 2RD, UK
| | - Robert Zimmermann
- Institute of Molecular Biosciences, University of Graz, A‐8010 Graz, Austria
| | - Karl Gruber
- Institute of Molecular Biosciences, University of Graz, A‐8010 Graz, Austria
| | - Monika Oberer
- Institute of Molecular Biosciences, University of Graz, A‐8010 Graz, Austria
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Dawson G, Fuller M, Helmsley KM, Hopwood JJ. Abnormal gangliosides are localized in lipid rafts in Sanfilippo (MPS3a) mouse brain. Neurochem Res 2012; 37:1372-80. [PMID: 22484966 PMCID: PMC3646418 DOI: 10.1007/s11064-012-0761-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2011] [Revised: 02/29/2012] [Accepted: 03/22/2012] [Indexed: 01/16/2023]
Abstract
Allogenic stem cell transplantation can reduce lysosomal storage of heparan sulfate-derived oligosaccharides by up to 27 % in Sanfilippo MPS3a brain, but does not reduce the abnormal storage of sialolactosylceramide (G(M3)) or improve neurological symptoms, suggesting that ganglioside storage is in a non-lysosomal compartment. To investigate this further we isolated the Triton X100-insoluble at 4 °C, lipid raft (LR) fraction from a sucrose-density gradient from cerebral hemispheres of a 7 month old mouse model of Sanfilippo MPS3a and age-matched control mouse brain. HPLC/MS/MS analysis revealed the expected enrichment of normal complex gangliosides, ceramides, galatosylceramides and sphingomyelin enrichment in this LR fraction. The abnormal HS-derived oligosaccharide storage material was in the Triton X100-soluble at 4 °C fractions (8-12),whereas both GM3 and sialo[GalNAc]lactosylceramide (GM2) were found exclusively in the LR fraction (fractions 3 and 4) and were >90 % C18:0 fatty acid, suggesting a neuronal origin. Further analysis also revealed a >threefold increase in the late-endosome marker bis (monoacylglycerol) phosphate (>70 % as C22:6/22:6-BMP) in non-LR fractions 8-12 whereas different forms of the proposed BMP precursor, phosphatidylglycerol (PG) were in both LR and non-LR fractions and were less elevated in MPS3a brain. Thus heparan sulfate-derived oligosaccharide storage is associated with abnormal lipid accumulation in both lysosomal (BMP) and non-lysosomal (GM3 and GM2) compartments.
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Affiliation(s)
- G Dawson
- University of Chicago, Chicago, IL, USA.
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41
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Petrie JR, Vanhercke T, Shrestha P, El Tahchy A, White A, Zhou XR, Liu Q, Mansour MP, Nichols PD, Singh SP. Recruiting a new substrate for triacylglycerol synthesis in plants: the monoacylglycerol acyltransferase pathway. PLoS One 2012; 7:e35214. [PMID: 22523576 PMCID: PMC3327653 DOI: 10.1371/journal.pone.0035214] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2012] [Accepted: 03/12/2012] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Monoacylglycerol acyltransferases (MGATs) are predominantly associated with lipid absorption and resynthesis in the animal intestine where they catalyse the first step in the monoacylglycerol (MAG) pathway by acylating MAG to form diacylglycerol (DAG). Typical plant triacylglycerol (TAG) biosynthesis routes such as the Kennedy pathway do not include an MGAT step. Rather, DAG and TAG are synthesised de novo from glycerol-3-phosphate (G-3-P) by a series of three subsequent acylation reactions although a complex interplay with membrane lipids exists. METHODOLOGY/PRINCIPAL FINDINGS We demonstrate that heterologous expression of a mouse MGAT acyltransferase in Nicotiana benthamiana significantly increases TAG accumulation in vegetative tissues despite the low levels of endogenous MAG substrate available. In addition, DAG produced by this acyltransferase can serve as a substrate for both native and coexpressed diacylglycerol acyltransferases (DGAT). Finally, we show that the Arabidopsis thaliana GPAT4 acyltransferase can produce MAG in Saccharomyces cerevisiae using oleoyl-CoA as the acyl-donor. CONCLUSIONS/SIGNIFICANCE This study demonstrates the concept of a new method of increasing oil content in vegetative tissues by using MAG as a substrate for TAG biosynthesis. Based on in vitro yeast assays and expression results in N. benthamiana, we propose that co-expression of a MAG synthesising enzyme such as A. thaliana GPAT4 and a MGAT or bifunctional M/DGAT can result in DAG and TAG synthesis from G-3-P via a route that is independent and complementary to the endogenous Kennedy pathway and other TAG synthesis routes.
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Affiliation(s)
- James R. Petrie
- CSIRO Food Futures National Research Flagship, Canberra, ACT, Australia
| | | | - Pushkar Shrestha
- CSIRO Food Futures National Research Flagship, Canberra, ACT, Australia
| | - Anna El Tahchy
- CSIRO Food Futures National Research Flagship, Canberra, ACT, Australia
| | - Adam White
- CSIRO Food Futures National Research Flagship, Canberra, ACT, Australia
| | | | - Qing Liu
- CSIRO Food Futures National Research Flagship, Canberra, ACT, Australia
| | - Maged P. Mansour
- CSIRO Food Futures National Research Flagship, Canberra, ACT, Australia
- CSIRO Marine and Atmospheric Research, Hobart, TAS, Australia
| | - Peter D. Nichols
- CSIRO Food Futures National Research Flagship, Canberra, ACT, Australia
- CSIRO Marine and Atmospheric Research, Hobart, TAS, Australia
| | - Surinder P. Singh
- CSIRO Food Futures National Research Flagship, Canberra, ACT, Australia
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Piccoli E, Nadai M, Caretta CM, Bergonzini V, Del Vecchio C, Ha HR, Bigler L, Dal Zoppo D, Faggin E, Pettenazzo A, Orlando R, Salata C, Calistri A, Palù G, Baritussio A. Amiodarone impairs trafficking through late endosomes inducing a Niemann-Pick C-like phenotype. Biochem Pharmacol 2011; 82:1234-49. [PMID: 21878321 PMCID: PMC7092840 DOI: 10.1016/j.bcp.2011.07.090] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2011] [Revised: 07/19/2011] [Accepted: 07/20/2011] [Indexed: 02/03/2023]
Abstract
Patients treated with amiodarone accumulate lysobisphosphatidic acid (LBPA), also known as bis(monoacylglycero)phosphate, in airway secretions and develop in different tissues vacuoles and inclusion bodies thought to originate from endosomes. To clarify the origin of these changes, we studied in vitro the effects of amiodarone on endosomal activities like transferrin recycling, Shiga toxin processing, ESCRT-dependent lentivirus budding, fluid phase endocytosis, proteolysis and exosome secretion. Furthermore, since the accumulation of LBPA might point to a broader disturbance in lipid homeostasis, we studied the effect of amiodarone on the distribution of LBPA, unesterified cholesterol, sphingomyelin and glycosphyngolipids. Amiodarone analogues were also studied, including the recently developed derivative dronedarone. We found that amiodarone does not affect early endosomal activities, like transferrin recycling, Shiga toxin processing and lentivirus budding. Amiodarone, instead, interferes with late compartments of the endocytic pathway, blocking the progression of fluid phase endocytosis and causing fusion of organelles, collapse of lumenal structures, accumulation of undegraded substrates and amassing of different types of lipids. Not all late endocytic compartments are affected, since exosome secretion is spared. These changes recall the Niemann-Pick type-C phenotype (NPC), but originate by a different mechanism, since, differently from NPC, they are not alleviated by cholesterol removal. Studies with analogues indicate that basic pKa and high water-solubility at acidic pH are crucial requirements for the interference with late endosomes/lysosomes and that, in this respect, dronedarone is at least as potent as amiodarone. These findings may have relevance in fields unrelated to rhythm control.
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Affiliation(s)
- Elena Piccoli
- Department of Histology, Microbiology and Medical Biotechnologies, University of Padova, via A. Gabelli 63, 35121, Italy
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Heier C, Taschler U, Rengachari S, Oberer M, Wolinski H, Natter K, Kohlwein SD, Leber R, Zimmermann R. Identification of Yju3p as functional orthologue of mammalian monoglyceride lipase in the yeast Saccharomycescerevisiae. Biochim Biophys Acta Mol Cell Biol Lipids 2010; 1801:1063-71. [PMID: 20554061 PMCID: PMC2911655 DOI: 10.1016/j.bbalip.2010.06.001] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2010] [Revised: 05/19/2010] [Accepted: 06/01/2010] [Indexed: 01/16/2023]
Abstract
Monoacylglycerols (MAGs) are short-lived intermediates of glycerolipid metabolism. Specific molecular species, such as 2-arachidonoylglycerol, which is a potent activator of cannabinoid receptors, may also function as lipid signaling molecules. In mammals, enzymes hydrolyzing MAG to glycerol and fatty acids, resembling the final step in lipolysis, or esterifying MAG to diacylglycerol, are well known; however, despite the high level of conservation of lipolysis, the corresponding activities in yeast have not been characterized yet. Here we provide evidence that the protein Yju3p functions as a potent MAG hydrolase in yeast. Cellular MAG hydrolase activity was decreased by more than 90% in extracts of Yju3p-deficient cells, indicating that Yju3p accounts for the vast majority of this activity in yeast. Loss of this activity was restored by heterologous expression of murine monoglyceride lipase (MGL). Since yju3Δ mutants accumulated MAG in vivo only at very low concentrations, we considered the possibility that MAGs are re-esterified into DAG by acyltransferases. Indeed, cellular MAG levels were further increased in mutant cells lacking Yju3p and Dga1p or Lro1p acyltransferase activities. In conclusion, our studies suggest that catabolic and anabolic reactions affect cellular MAG levels. Yju3p is the functional orthologue of mammalian MGL and is required for efficient degradation of MAG in yeast.
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Affiliation(s)
| | | | | | | | | | | | | | - Regina Leber
- Corresponding author. Applied Biocatalysis Research Center, Petersgasse 14, A-8010 Graz, Austria. Tel.: +43 316 873 9342; fax: +43 316 873 9343.
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Tan MAF, Fuller M, Zabidi-Hussin ZAMH, Hopwood JJ, Meikle PJ. Biochemical profiling to predict disease severity in metachromatic leukodystrophy. Mol Genet Metab 2010; 99:142-8. [PMID: 19815439 DOI: 10.1016/j.ymgme.2009.09.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2009] [Revised: 09/09/2009] [Accepted: 09/10/2009] [Indexed: 11/21/2022]
Abstract
Metachromatic leukodystrophy is a neurodegenerative disease that is characterized by a deficiency of arylsulfatase A, resulting in the accumulation of sulfatide and other lipids in the lysosomal network of affected cells. Accumulation of sulfatide in the nervous system leads to severe impairment of neurological function with a fatal outcome. Prognosis is often poor unless treatment is carried out before the onset of clinical symptoms. Pre-symptomatic detection of affected individuals may be possible with the introduction of newborn screening programs. The ability to accurately predict clinical phenotype and rate of disease progression in asymptomatic individuals will be essential to assist selection of the most appropriate treatment strategy. Biochemical profiling, incorporating the determination of residual enzyme protein/activity using immune-based assays, and metabolite profiling using electrospray ionization-tandem mass spectrometry, was performed on urine and cultured skin fibroblasts from a cohort of patients representing the clinical spectrum of metachromatic leukodystrophy and on unaffected controls. Residual enzyme protein/activity in fibroblasts was able to differentiate unaffected controls, arylsulfatase A pseudo-deficient individuals, pseudo-deficient compound heterozygotes and affected patients. Metachromatic leukodystrophy phenotypes were distinguished by quantification of sulfatide and other secondarily altered lipids in urine and skin fibroblasts; this enabled further differentiation of the late-infantile form of the disorder from the juvenile and adult forms. Prediction of the rate of disease progression for metachromatic leukodystrophy requires a combination of information on genotype, residual arylsulfatase A protein and activity and the measurement of sulfatide and other lipids in urine and cultured skin fibroblasts.
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Affiliation(s)
- M A F Tan
- Lysosomal Diseases Research Unit, SA Pathology at Women's and Children's Hospital, North Adelaide, SA 5006, Australia
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Hullin-Matsuda F, Luquain-Costaz C, Bouvier J, Delton-Vandenbroucke I. Bis(monoacylglycero)phosphate, a peculiar phospholipid to control the fate of cholesterol: Implications in pathology. Prostaglandins Leukot Essent Fatty Acids 2009; 81:313-24. [PMID: 19857945 DOI: 10.1016/j.plefa.2009.09.006] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2009] [Revised: 09/21/2009] [Accepted: 09/21/2009] [Indexed: 12/15/2022]
Abstract
Bis(monoacylglycero)phosphate (BMP) is a structural isomer of phosphatidylglycerol that exhibits an unusual sn1:sn1' stereoconfiguration, based on the position of the phosphate moiety on its two glycerol units. Early works have underlined the high concentration of BMP in the lysosomal compartment, especially during some lysosomal storage disorders and drug-induced phospholipidosis. Despite numerous studies, both biosynthetic and degradative pathways of BMP remained not completely elucidated. More recently, BMP has been localized in the internal membranes of late endosomes where it forms specialized lipid domains. Its involvement in both dynamics and lipid/protein sorting functions of late endosomes has started to be documented, especially in the control of cellular cholesterol distribution. BMP also plays an important role in the late endosomal/lysosomal degradative pathway. Another peculiarity of BMP is to be naturally enriched in docosahexaenoic acid and/or to specifically incorporate this fatty acid compared to other polyunsaturated fatty acids, which may confer specific biophysical and functional properties to this phospholipid. This review summarizes and updates our knowledge on BMP with an emphasis on its possible implication in human health and diseases, especially in relation to cholesterol homeostasis.
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Affiliation(s)
- F Hullin-Matsuda
- Université de Lyon, UMR 870 Inserm, Insa-Lyon, UMR 1135 Inra, Univ Lyon 1, Hospices Civils de Lyon, IMBL, 20 Ave A. Einstein, 69621 Villeurbanne, France
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Lin YC, Schlievert PM, Anderson MJ, Fair CL, Schaefers MM, Muthyala R, Peterson ML. Glycerol monolaurate and dodecylglycerol effects on Staphylococcus aureus and toxic shock syndrome toxin-1 in vitro and in vivo. PLoS One 2009; 4:e7499. [PMID: 19838303 PMCID: PMC2759527 DOI: 10.1371/journal.pone.0007499] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2009] [Accepted: 09/24/2009] [Indexed: 12/23/2022] Open
Abstract
Background Glycerol monolaurate (GML), a 12 carbon fatty acid monoester, inhibits Staphylococcus aureus growth and exotoxin production, but is degraded by S. aureus lipase. Therefore, dodecylglycerol (DDG), a 12 carbon fatty acid monoether, was compared in vitro and in vivo to GML for its effects on S. aureus growth, exotoxin production, and stability. Methodology/Principal Findings Antimicrobial effects of GML and DDG (0 to 500 µg/ml) on 54 clinical isolates of S. aureus, including pulsed-field gel electrophoresis (PFGE) types USA200, USA300, and USA400, were determined in vitro. A rabbit Wiffle ball infection model assessed GML and DDG (1 mg/ml instilled into the Wiffle ball every other day) effects on S. aureus (MN8) growth (inoculum 3×108 CFU/ml), toxic shock syndrome toxin-1 (TSST-1) production, tumor necrosis factor-α (TNF-α) concentrations and mortality over 7 days. DDG (50 and 100 µg/ml) inhibited S. aureus growth in vitro more effectively than GML (p<0.01) and was stable to lipase degradation. Unlike GML, DDG inhibition of TSST-1 was dependent on S. aureus growth. GML-treated (4 of 5; 80%) and DDG-treated rabbits (2 of 5; 40%) survived after 7 days. Control rabbits (5 of 5; 100%) succumbed by day 4. GML suppressed TNF-α at the infection site on day 7; however, DDG did not (<10 ng/ml versus 80 ng/ml, respectively). Conclusions/Significance These data suggest that DDG was stable to S. aureus lipase and inhibited S. aureus growth at lower concentrations than GML in vitro. However, in vivo GML was more effective than DDG by reducing mortality, and suppressing TNF-α, S. aureus growth and exotoxin production, which may reduce toxic shock syndrome. GML is proposed as a more effective anti-staphylococcal topical anti-infective candidate than DDG, despite its potential degradation by S. aureus lipase.
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Affiliation(s)
- Ying-Chi Lin
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, United States of America
| | - Patrick M. Schlievert
- Department of Microbiology, Medical School, University of Minnesota, Minneapolis, Minnesota, United States of America
| | - Michele J. Anderson
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, United States of America
| | - Christina L. Fair
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, United States of America
| | - Matthew M. Schaefers
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, United States of America
| | - Ramaiah Muthyala
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, United States of America
- Center for Orphan Drug Research, University of Minnesota, Minneapolis, Minnesota, United States of America
| | - Marnie L. Peterson
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, United States of America
- Department of Microbiology, Medical School, University of Minnesota, Minneapolis, Minnesota, United States of America
- * E-mail:
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Valério A, Krüger RL, Ninow J, Corazza FC, de Oliveira D, Oliveira JV, Corazza ML. Kinetics of solvent-free lipase-catalyzed glycerolysis of olive oil in surfactant system. J Agric Food Chem 2009; 57:8350-8356. [PMID: 19708657 DOI: 10.1021/jf901771m] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
This work reports experimental data and kinetic modeling of solvent-free glycerolysis of olive oil using a commercial immobilized lipase (Novozym 435) in the presence of Triton X-100 surfactant for the production of monoacylglycerols (MAG) and diacylglycerols (DAG). The experiments were performed in batch mode evaluating the effects of temperature (30-70 degrees C), enzyme concentration (2.5-18 wt %), Triton X-100 concentration (10-20 wt %), and glycerol to oil molar ratio (3:1, 6:1, and 9:1). Experimental results showed that lipase-catalyzed solvent-free glycerolysis with the addition of Triton X-100 might be a potential alternative route to conventional organic solvent methods, as good conversions were obtained with relatively low enzyme concentrations (9 wt %) in short reaction times (240 min). The glycerolysis and hydrolysis parallel reactions were considered with rate constants estimated by minimizing a maximum likelihood function. A very satisfactory agreement between experimental data and model results was obtained, thus allowing a better understanding of the reaction kinetics.
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Affiliation(s)
- Alexsandra Valério
- Department of Food Engineering, URI - Campus de Erechim, Av. Sete de Setembro 1621, Erechim, 99700-000 RS, Brazil
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Reis P, Holmberg K, Miller R, Krägel J, Grigoriev DO, Leser ME, Watzke HJ. Competition between lipases and monoglycerides at interfaces. Langmuir 2008; 24:7400-7407. [PMID: 18547084 DOI: 10.1021/la800531y] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Tensiometry (the pendant drop technique), interfacial shear rheology, and ellipsometry have been used to study the effect of polar lipids that are generated during fat digestion on the behavior of lipases at the oil-water interface. Both Sn-1,3 regiospecific and nonregiospecific lipases have been used, and a noncatalytically active protein, beta-lacloglobulin, has been used as reference in the interfacial shear rheology experiments. The results from the pendant drop measurements and the interfacial rheology studies were in agreement with each other and demonstrated that the Sn-2 monoglyceride, which is one of the lipolysis products generated when a Sn-1,3 regiospecific lipase catalyzes triglyceride hydrolysis, is very interfacially active and efficiently expels the enzyme from the interface. Ellipsometry conducted at the liquid-liquid interface showed that the lipase forms a sublayer in the aqueous phase, just beneath the monoglyceride-covered interface. Sn-1/3 monoglycerides do not behave this way because they are rapidly degraded to fatty acid and glycerol and the fatty acid (or the fatty acid salt) does not have enough interfacial activity to expel the lipase from the interface. Since the lipases present in the gastrointestinal tract are highly Sn-1,3 regiospecific, we believe that the results obtained can be transferred to the in vivo situation. The formation of stable and amphiphilic Sn-2 monoglycerides can be seen as a self-regulatory process for fat digestion.
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Affiliation(s)
- Pedro Reis
- Nestle Research Center, CH-1000 Lausanne 26, Switzerland
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Abstract
Intestinal monoacylglycerol (MG) metabolism is well known to involve its anabolic reesterification to triacylglycerol (TG). We recently provided evidence for enterocyte MG hydrolysis and demonstrated expression of the monoacylglycerol lipase (MGL) gene in human intestinal Caco-2 cells and rodent small intestinal mucosa. Despite the large quantities of MG derived from dietary TG, the regulation of MG metabolism in the intestine has not been previously explored. In the present studies, we examined the mRNA expression, protein expression, and activities of the two known MG-metabolizing enzymes, MGL and MGAT2, in C57BL/6 mouse small intestine, as well as liver and adipose tissues, during development and under nutritional modifications. Results demonstrate that MG metabolism undergoes tissue-specific changes during development. Marked induction of small intestinal MGAT2 protein expression and activity were found during suckling. Moreover, while substantial levels of MGL protein and activity were detected in adult intestine, its regulation during ontogeny was complex, suggesting post-transcriptional regulation of expression. In addition, during the suckling period MG hydrolytic activity is likely to derive from carboxyl ester lipase rather than MGL. In contrast to intestinal MGL, liver MGL mRNA, protein and activity all increased 5-10-fold during development, suggesting that transcriptional regulation is the primary mechanism for hepatic MGL expression. Three weeks of high fat feeding (40% kcal) significantly induced MGL expression and activity in small intestine relative to low fat feeding (10% kcal), but little change was observed upon starvation, suggesting a role for MGL in dietary lipid assimilation following a high fat intake.
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Affiliation(s)
- Su-Hyoun Chon
- Department of Nutritional Sciences and the Rutgers Center for Lipid Research, Rutgers University, New Brunswick, New Jersey 08901
| | - Yin Xiu Zhou
- Department of Nutritional Sciences and the Rutgers Center for Lipid Research, Rutgers University, New Brunswick, New Jersey 08901
| | - Joseph L Dixon
- Department of Nutritional Sciences and the Rutgers Center for Lipid Research, Rutgers University, New Brunswick, New Jersey 08901
| | - Judith Storch
- Department of Nutritional Sciences and the Rutgers Center for Lipid Research, Rutgers University, New Brunswick, New Jersey 08901.
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Damstrup ML, Kiil S, Jensen AD, Sparsø FV, Xu X. Process development of continuous glycerolysis in an immobilized enzyme-packed reactor for industrial monoacylglycerol production. J Agric Food Chem 2007; 55:7786-92. [PMID: 17715899 DOI: 10.1021/jf063366p] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Continuous and easily operated glycerolysis was studied in different lipase-packed columns to evaluate the most potential process set-ups for industrial monoacylglycerol (MAG) production. Practical design-related issues such as enzyme-filling degree, required reaction time, mass transfer investigations, and capacity and stability of the enzyme were evaluated. A commercially available immobilized Candida antarctica lipase B was used to catalyze the glycerolysis reaction between glycerol and sunflower oil dissolved in a binary tert-butanol: tert-pentanol medium. Considering easy handling of the enzyme and measured expansion when wetted with a reaction mixture, a filling degree of 52 vol % dry enzymes particles per column volume seemed appropriate. Twenty minutes was required to reach equilibrium conditions with a MAG content of 50-55 wt %. Only insignificant indications of mass transfer limitations were observed. Hence, the commercial lipase seemed adequate to use in its available particle size distribution ranging from 300 to 900 microm. A column length-to-diameter ratio of less than 25 did not interfere with the transfer of the fluid mixture through the column. Under the tested conditions, the enzyme could be active for approximately 92 days before enzyme renewal was needed. This corresponds to a very high enzyme capacity with approximately 2000 L pure MAG produced per kg enzyme.
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Affiliation(s)
- Marianne Linde Damstrup
- BioCentrum and Department of Chemical Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
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