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Ding Z, Song H, Wang F. Role of lipins in cardiovascular diseases. Lipids Health Dis 2023; 22:196. [PMID: 37964368 PMCID: PMC10644651 DOI: 10.1186/s12944-023-01961-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Accepted: 11/01/2023] [Indexed: 11/16/2023] Open
Abstract
Lipin family members in mammals include lipins 1, 2, and 3. Lipin family proteins play a crucial role in lipid metabolism due to their bifunctionality as both transcriptional coregulators and phosphatidate phosphatase (PAP) enzymes. In this review, we discuss the structural features, expression patterns, and pathophysiologic functions of lipins, emphasizing their direct as well as indirect roles in cardiovascular diseases (CVDs). Elucidating the regulation of lipins facilitates a deeper understanding of the roles of lipins in the processes underlying CVDs. The activity of lipins is modulated at various levels, e.g., in the form of the transcription of genes, post-translational modifications, and subcellular protein localization. Because lipin characteristics are undergoing progressive clarification, further research is necessitated to then actuate the investigation of lipins as viable therapeutic targets in CVDs.
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Affiliation(s)
- Zerui Ding
- The Endocrinology Department of the Third Xiangya Hospital, Central South University, Changsha, 410013, China
- Xiangya School of Medicine, Central South University, Changsha, 410013, China
| | - Hongyu Song
- The Endocrinology Department of the Third Xiangya Hospital, Central South University, Changsha, 410013, China
- Xiangya School of Medicine, Central South University, Changsha, 410013, China
| | - Fang Wang
- The Endocrinology Department of the Third Xiangya Hospital, Central South University, Changsha, 410013, China.
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2
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Invernizzi F, Izzo R, Colangelo I, Legati A, Zanetti N, Garavaglia B, Lamantea E, Peverelli L, Ardissone A, Moroni I, Maggi L, Bonanno S, Fiori L, Velardo D, Magri F, Comi GP, Ronchi D, Ghezzi D, Lamperti C. NGS-Based Genetic Analysis in a Cohort of Italian Patients with Suspected Inherited Myopathies and/or HyperCKemia. Genes (Basel) 2023; 14:1393. [PMID: 37510298 PMCID: PMC10379733 DOI: 10.3390/genes14071393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 06/26/2023] [Accepted: 06/28/2023] [Indexed: 07/30/2023] Open
Abstract
Introduction/Aims HyperCKemia is considered a hallmark of neuromuscular diseases. It can be either isolated or associated with cramps, myalgia, weakness, myoglobinuria, or rhabdomyolysis, suggesting a metabolic myopathy. The aim of this work was to investigate possible genetic causes in order to help diagnose patients with recurrent hyperCKemia or clinical suspicion of inherited metabolic myopathy. Methods A cohort of 139 patients (90 adults and 49 children) was analyzed using a custom panel containing 54 genes associated with hyperCKemia. Results A definite genetic diagnosis was obtained in 15.1% of cases, while candidate variants or variants of uncertain significance were found in a further 39.5%. Similar percentages were obtained in patients with infantile or adult onset, with some different causative genes. RYR1 was the gene most frequently identified, either with single or compound heterozygous variants, while ETFDH variants were the most common cause for recessive cases. In one patient, mRNA analysis allowed identifying a large LPIN1 deletion missed by DNA sequencing, leading to a certain diagnosis. Conclusion These data confirm the high genetic heterogeneity of hyperCKemia and metabolic myopathies. The reduced diagnostic yield suggests the existence of additional genes associated with this condition but also allows speculation that a significant number of cases presenting with hyperCKemia or muscle symptoms are due to extrinsic, not genetic, factors.
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Affiliation(s)
- Federica Invernizzi
- Medical Genetics and Neurogenetics Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20126 Milan, Italy
| | - Rossella Izzo
- Medical Genetics and Neurogenetics Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20126 Milan, Italy
| | - Isabel Colangelo
- Medical Genetics and Neurogenetics Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20126 Milan, Italy
| | - Andrea Legati
- Medical Genetics and Neurogenetics Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20126 Milan, Italy
| | - Nadia Zanetti
- Medical Genetics and Neurogenetics Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20126 Milan, Italy
| | - Barbara Garavaglia
- Medical Genetics and Neurogenetics Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20126 Milan, Italy
| | - Eleonora Lamantea
- Medical Genetics and Neurogenetics Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20126 Milan, Italy
| | - Lorenzo Peverelli
- Medical Genetics and Neurogenetics Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20126 Milan, Italy
| | - Anna Ardissone
- Child Neurology Unit-Department of Pediatric Neuroscience, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20133 Milan, Italy
| | - Isabella Moroni
- Child Neurology Unit-Department of Pediatric Neuroscience, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20133 Milan, Italy
| | - Lorenzo Maggi
- Department of Neuroimmunology and Neuromuscular Diseases, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20133 Milan, Italy
| | - Silvia Bonanno
- Department of Neuroimmunology and Neuromuscular Diseases, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20133 Milan, Italy
| | - Laura Fiori
- UOS di Malattie Metaboliche e Nutrizione, Ospedale dei Bambini Vittore Buzzi, 20154 Milan, Italy
| | - Daniele Velardo
- Neuromuscular and Rare Disease Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy
| | - Francesca Magri
- Neurology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy
| | - Giacomo P Comi
- Neuromuscular and Rare Disease Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy
- Department of Pathophysiology and Transplantation, Dino Ferrari Center, University of Milan, 20122 Milan, Italy
| | - Dario Ronchi
- Neurology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy
- Department of Pathophysiology and Transplantation, Dino Ferrari Center, University of Milan, 20122 Milan, Italy
| | - Daniele Ghezzi
- Medical Genetics and Neurogenetics Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20126 Milan, Italy
- Lab of Neurogenetics and Mitochondrial Disorders, Department of Pathophysiology and Transplantation, University of Milan, 20122 Milan, Italy
| | - Costanza Lamperti
- Medical Genetics and Neurogenetics Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20126 Milan, Italy
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3
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Yeganeh M, March K, Jones C, Ho G, Selby KA, Chanoine JP, Stockler S, Salvarinova R, Horvath G, Brunel-Guitton C. Use of dexamethasone in acute rhabdomyolysis in LPIN1 deficiency. Mol Genet Metab Rep 2023; 35:100961. [PMID: 36941958 PMCID: PMC10024045 DOI: 10.1016/j.ymgmr.2023.100961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 02/20/2023] [Accepted: 02/21/2023] [Indexed: 03/12/2023] Open
Abstract
Introduction LPIN1 deficiency is an autosomal recessive form of early childhood recurrent severe rhabdomyolysis. Although not completely lucid yet, LPIN1 has been shown to modulate endosomal-related pro-inflammatory responses via peroxisome proliferator-activated receptor α (PPARα) and PPARγ coactivator 1α (PGC-1α). Treatment with anti-inflammatory agents such as dexamethasone has been proposed to improve the outcome. Case We report a male toddler with recurrent episodes of complicated rhabdomyolysis, requiring prolonged intensive care unit admissions. Whole exome sequencing revealed a common homozygous 1.7 kb intragenic deletion in LPIN1. Despite optimal metabolic cares, the patient presented with an extremely high CK level where he benefited from intravenous dexamethasone (0.6 mg/Kg/day) for a period of 6 days. Results Dexamethasone administration shortened the course of active rhabdomyolysis, intensive care admission and rehabilitation. It also prevented rhabdomyolysis-related complications such as kidney injury and compartment syndrome. Conclusion Our patient showed a favorable response to parenteral dexamethasone, in addition to hyperhydration with IV fluids, sufficient calorie intake, and restricted dietary fat. The improvement with corticosteroids suggests an uncontrolled inflammatory response as the pathophysiology of LPIN1 deficiency.
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Affiliation(s)
- Mehdi Yeganeh
- Division of Biochemical Genetics, Department of Pediatrics, University of British Columbia, BC Children's Hospital, Vancouver V6H 3N1, BC, Canada
| | - Kaitlin March
- Division of Biochemical Genetics, Department of Pediatrics, University of British Columbia, BC Children's Hospital, Vancouver V6H 3N1, BC, Canada
| | - Catherine Jones
- Division of Biochemical Genetics, Department of Pediatrics, University of British Columbia, BC Children's Hospital, Vancouver V6H 3N1, BC, Canada
| | - Gloria Ho
- Division of Biochemical Genetics, Department of Pediatrics, University of British Columbia, BC Children's Hospital, Vancouver V6H 3N1, BC, Canada
| | - Kathryn A. Selby
- Division of Neurology, Department of Pediatrics, University of British Columbia, BC Children's Hospital, Vancouver, V6H 3N1, BC, Canada
| | - Jean-Pierre Chanoine
- Division of Endocrinology, Department of Pediatrics, University of British Columbia, BC Children's Hospital, Vancouver, V6H 3N1, BC, Canada
| | - Sylvia Stockler
- Division of Biochemical Genetics, Department of Pediatrics, University of British Columbia, BC Children's Hospital, Vancouver V6H 3N1, BC, Canada
| | - Ramona Salvarinova
- Division of Biochemical Genetics, Department of Pediatrics, University of British Columbia, BC Children's Hospital, Vancouver V6H 3N1, BC, Canada
| | - Gabriella Horvath
- Division of Biochemical Genetics, Department of Pediatrics, University of British Columbia, BC Children's Hospital, Vancouver V6H 3N1, BC, Canada
| | - Catherine Brunel-Guitton
- Division of Biochemical Genetics, Department of Pediatrics, University of British Columbia, BC Children's Hospital, Vancouver V6H 3N1, BC, Canada
- Corresponding author.
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Renard P, Caccavelli L, Legendre A, Tuchmann-Durand C, Balakirouchenane D, Blanchet B, Narjoz C, Straube M, Hubas A, Garros A, Mention K, Bednarek N, Goudin N, Broissand C, Schlatter J, Cisternino S, Cagnard N, van Endert P, Diana J, de Calbiac H, de Lonlay P. Hydroxychloroquine sulfate: A novel treatment for lipin-1 deficiency? Biomed Pharmacother 2023; 163:114813. [PMID: 37150031 DOI: 10.1016/j.biopha.2023.114813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 04/26/2023] [Accepted: 04/30/2023] [Indexed: 05/09/2023] Open
Abstract
BACKGROUND Lipin-1 deficiency is a life-threatening disease that causes severe rhabdomyolysis (RM) and chronic symptoms associated with oxidative stress. In the absence of treatment, Hydroxychloroquine sulfate (HCQ) was administered to patients off label use on a compassionate basis in order to improve their physical conditions. METHODS Eleven patients with LPIN1 mutations were treated with HCQ. Clinical and biological efficacy and tolerance were assessed, including pain and quality of life, physical capacities, cardiopulmonary parameters, creatine kinase levels and plasma proinflammatory cytokines. To explore a dose-dependent effect of HCQ, primary myoblasts from 4 patients were incubated with various HCQ concentrations in growth medium (GM) or during starvation (EBSS medium) to investigate autophagy and oxidative stress. FINDINGS Under HCQ treatment, patient physical capacities improved. Abnormal cardiac function and peripheral muscle adaptation to exercise were normalized. However, two patients who had the highest mean blood HCQ concentrations experienced RM. We hypothesized that HCQ exerts deleterious effects at high concentrations by blocking autophagy, and beneficial effects on oxidative stress at low concentrations. We confirmed in primary myoblasts from 4 patients that high in vitro HCQ concentration (10 µM) but not low concentration (1 µM and 0.1 µM) induced autophagy blockage by modifying endolysosomal pH. Low HCQ concentration (1 µM) prevented reactive oxygen species (ROS) and oxidized DNA accumulation in myoblasts during starvation. INTERPRETATION HCQ improves the condition of patients with lipin-1 deficiency, but at low concentrations. In vitro, 1 µM HCQ decreases oxidative stress in myoblasts whereas higher concentrations have a deleterious effect by blocking autophagy.
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Affiliation(s)
- Perrine Renard
- Université Paris Cité, INSERM, CNRS, Institut Necker Enfants Malades, F-75015 Paris, France
| | - Laure Caccavelli
- Université Paris Cité, INSERM, CNRS, Institut Necker Enfants Malades, F-75015 Paris, France; Centre de référence des maladies héréditaires du métabolisme, Hôpital Universitaire Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP), Institut Imagine, Filière G2M, MetabERN, F-75015 Paris, France
| | - Antoine Legendre
- Centre de référence Malformations Cardiaques Congénitales Complexes M3C - Hôpital Universitaire Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP), F-75015 Paris, France
| | - Caroline Tuchmann-Durand
- Centre de référence des maladies héréditaires du métabolisme, Hôpital Universitaire Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP), Institut Imagine, Filière G2M, MetabERN, F-75015 Paris, France; Institut Imagine, Centre d'Investigation Clinique pour les Thérapies innovantes, Département de Biothérapie, Hôpital Universitaire Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP), F-75015 Paris, France
| | - David Balakirouchenane
- Département de pharmacocinétique et pharmacochimie, Centre Hospitalier Universitaire Cochin, Assistance Publique-Hôpitaux de Paris (AP-HP), CARPEM, F-75014 Paris, France
| | - Benoit Blanchet
- Département de pharmacocinétique et pharmacochimie, Centre Hospitalier Universitaire Cochin, Assistance Publique-Hôpitaux de Paris (AP-HP), CARPEM, F-75014 Paris, France; Université Paris Cité, PRES Sorbonne Paris Cité, CARPEM, Faculté de Pharmacie, INSERM U-1268 / CNRS UMR-8038, FR-750006 Paris, France
| | - Céline Narjoz
- Service de Biochimie, Hôpital Universitaire Européen Georges Pompidou, Assistance Publique-Hôpitaux de Paris (AP-HP), F-75015 Paris, France
| | - Marjolène Straube
- Université Paris Cité, INSERM, CNRS, Institut Necker Enfants Malades, F-75015 Paris, France; Centre de référence des maladies héréditaires du métabolisme, Hôpital Universitaire Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP), Institut Imagine, Filière G2M, MetabERN, F-75015 Paris, France
| | - Arnaud Hubas
- Service de biochimie et Génétique Moléculaire, Laboratoire de culture cellulaire, Hôpital Universitaire Cochin, Assistance Publique-Hôpitaux de Paris (AP-HP), F-75014 Paris, France
| | - Alexa Garros
- Centre de compétence des maladies héréditaires du métabolisme, Hôpital Universitaire Grenoble Alpes, Filière G2M, Grenoble, France
| | - Karine Mention
- Centre de référence des maladies héréditaires du métabolisme, Hôpital Universitaire Jeanne de Flandre, Filière G2M, MetabERN, Lille, France
| | - Nathalie Bednarek
- Centre de compétence des maladies héréditaires du métabolisme, Hôpital Universitaire, Filière G2M, Reims, France
| | - Nicolas Goudin
- Cell Imaging & Flow Cytometry Core Facilities, Structure Fédérative de Recherche Necker, INSERM US24/CNRS UMS3633, Paris, France
| | - Christine Broissand
- Service de Pharmacie, Hôpital Universitaire Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP), F-75015 Paris, France
| | - Joel Schlatter
- Service de Pharmacie, Hôpital Universitaire Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP), F-75015 Paris, France
| | - Salvatore Cisternino
- Service de Pharmacie, Hôpital Universitaire Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP), F-75015 Paris, France; Université Paris Cité, Optimisation Thérapeutique en Neuropsychopharmacologie, INSERM UMRS-1144, F-75006 Paris, France
| | - Nicolas Cagnard
- Université Paris Cité, Bioinformatiques, SFR Necker, INSERM US-24 / CNRS UAR-3633, F-75015 Paris, France
| | - Peter van Endert
- Université Paris Cité, INSERM, CNRS, Institut Necker Enfants Malades, F-75015 Paris, France; Service Immunologie Biologique, AP-HP, Hôpital Universitaire Necker-Enfants Malades, F-75015 Paris, France
| | - Julien Diana
- Université Paris Cité, INSERM, CNRS, Institut Necker Enfants Malades, F-75015 Paris, France
| | - Hortense de Calbiac
- Université Paris Cité, INSERM, CNRS, Institut Necker Enfants Malades, F-75015 Paris, France; Centre de référence des maladies héréditaires du métabolisme, Hôpital Universitaire Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP), Institut Imagine, Filière G2M, MetabERN, F-75015 Paris, France
| | - Pascale de Lonlay
- Université Paris Cité, INSERM, CNRS, Institut Necker Enfants Malades, F-75015 Paris, France; Centre de référence des maladies héréditaires du métabolisme, Hôpital Universitaire Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP), Institut Imagine, Filière G2M, MetabERN, F-75015 Paris, France.
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5
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Jama A, Alshudukhi AA, Burke S, Dong L, Kamau JK, Voss AA, Ren H. Lipin1 plays complementary roles in myofibre stability and regeneration in dystrophic muscles. J Physiol 2023; 601:961-978. [PMID: 36715084 PMCID: PMC9992338 DOI: 10.1113/jp284085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 01/23/2023] [Indexed: 01/31/2023] Open
Abstract
Duchenne muscular dystrophy (DMD) is a severe muscle wasting disorder caused by dystrophin mutations, leading to the loss of sarcolemmal integrity, and resulting in progressive myofibre necrosis and impaired muscle function. Our previous studies suggest that lipin1 is important for skeletal muscle regeneration and myofibre integrity. Additionally, we discovered that mRNA expression levels of lipin1 were significantly reduced in skeletal muscle of DMD patients and the mdx mouse model. To understand the role of lipin1 in dystrophic muscle, we generated dystrophin/lipin1 double knockout (DKO) mice, and compared the limb muscle pathology and function of wild-type B10, muscle-specific lipin1 deficient (lipin1Myf5cKO ), mdx and DKO mice. We found that further knockout of lipin1 in dystrophic muscle exhibited a more severe phenotype characterized by increased necroptosis, fibrosis and exacerbated membrane damage in DKO compared to mdx mice. In barium chloride-induced muscle injury, both lipin1Myf5cKO and DKO showed prolonged regeneration at day 14 post-injection, suggesting that lipin1 is critical for muscle regeneration. In situ contractile function assays showed that lipin1 deficiency in dystrophic muscle led to reduced specific force production. Using a cell culture system, we found that lipin1 deficiency led to elevated expression levels of necroptotic markers and medium creatine kinase, which could be a result of sarcolemmal damage. Most importantly, restoration of lipin1 inhibited the elevation of necroptotic markers in differentiated primary lipin1-deficient myoblasts. Overall, our data suggests that lipin1 plays complementary roles in myofibre stability and muscle function in dystrophic muscles, and overexpression of lipin1 may serve as a potential therapeutic strategy for dystrophic muscles. KEY POINTS: We identified that lipin1 mRNA expression levels are significantly reduced in skeletal muscles of Duchenne muscular dystrophy patients and mdx mice. We found that further depletion of lipin1 in skeletal muscles of mdx mice induces more severe dystrophic phenotypes, including enhanced myofibre sarcolemma damage, muscle necroptosis, inflammation, fibrosis and reduced specific force production. Lipin1 deficiency leads to elevated expression levels of necroptotic markers, whereas restoration of lipin1 inhibits their expression. Our results suggest that lipin1 is functionally complementary to dystrophin in muscle membrane integrity and muscle regeneration.
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Affiliation(s)
- Abdulrahman Jama
- Department of Biochemistry and Molecular Biology, Wright State University, Dayton, OH, USA
| | - Abdullah A. Alshudukhi
- Department of Biochemistry and Molecular Biology, Wright State University, Dayton, OH, USA
| | - Steve Burke
- Department of Biological Sciences, Wright State University, Dayton, OH, USA
| | - Lixin Dong
- Mumetel LLC, University Technology Park at IIT, Chicago, IL, USA
| | - John Karanja Kamau
- Department of Biochemistry and Molecular Biology, Wright State University, Dayton, OH, USA
| | - Andrew Alvin Voss
- Department of Biological Sciences, Wright State University, Dayton, OH, USA
| | - Hongmei Ren
- Department of Biochemistry and Molecular Biology, Wright State University, Dayton, OH, USA
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6
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Tuchmann-Durand C, Roda C, Renard P, Mortamet G, Bérat CM, Altenburger L, de Larauz MH, Thevenet E, Cottart CH, Moulin F, Bouchereau J, Brassier A, Arnoux JB, Schiff M, Bednarek N, Lamireau D, Garros A, Mention K, Cano A, Finger L, Pelosi M, Brochet CS, Caccavelli L, Raphalen JH, Renolleau S, Oualha M, de Lonlay P. Systemic corticosteroids for the treatment of acute episodes of rhabdomyolysis in lipin-1-deficient patients. J Inherit Metab Dis 2023. [PMID: 36680547 DOI: 10.1002/jimd.12592] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 01/13/2023] [Accepted: 01/19/2023] [Indexed: 01/22/2023]
Abstract
Mutations in the LPIN1 gene constitute a major cause of severe rhabdomyolysis (RM). The TLR9 activation prompted us to treat patients with corticosteroids in acute conditions. In patients with LPIN1 mutations, RM and at-risk situations that can trigger RM have been treated in a uniform manner. Since 2015, these patients have also received intravenous corticosteroids. We retrospectively compared data on hospital stays by corticosteroid-treated patients vs. patients not treated with corticosteroids. Nineteen patients were hospitalized. The median number of admissions per patient was 21 overall and did not differ when comparing the 10 corticosteroid-treated patients with the 9 patients not treated with corticosteroids. Four patients in the non-corticosteroid group died during a RM (mean age at death: 5.6 years). There were no deaths in the corticosteroid group. The two groups did not differ significantly in the number of RM episodes. However, for the six patients who had RM and occasionally been treated with corticosteroids, the median number of RM episodes was significantly lower when intravenous steroids had been administered. The peak plasma creatine kinase level and the area under the curve were or tended to be higher in patients treated with corticosteroids-even after the exclusion of deceased patients or focusing on the period after 2015. The median length of stay (10 days overall) was significantly longer for corticosteroid-treated patients but was similar after the exclusion of deceased patients. The absence of deaths and the higher severity of RM observed among corticosteroid-treated patients could suggest that corticotherapy is associated with greater survival.
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Affiliation(s)
- Caroline Tuchmann-Durand
- Imagine Institute, Biotherapy Clinical Investigation Center, Biotherapy Department, Necker-Enfants-Malades University Hospital, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
| | - Célina Roda
- Université Paris Cité, Health Environmental Risk Assessment (HERA) Team, CRESS, INSERM, INRAE, Paris, France
- Faculté de Pharmacie de Paris, Université Paris Cité, Paris, France
| | - Perrine Renard
- INSERM U1151, Institut Necker Enfants-Malades (INEM), Paris, France
| | - Guillaume Mortamet
- Pediatric Intensive Care Unit, Grenoble Alpes University Hospital, Grenoble, France
| | - Claire-Marine Bérat
- Reference Center for Inherited Metabolic Diseases, Necker-Enfants-Malades University Hospital, APHP, Imagine Institute, G2M, MetabERN, Paris, France
| | - Lucile Altenburger
- Reference Center for Inherited Metabolic Diseases, Necker-Enfants-Malades University Hospital, APHP, Imagine Institute, G2M, MetabERN, Paris, France
| | - Marie Hug de Larauz
- Imagine Institute, Biotherapy Clinical Investigation Center, Biotherapy Department, Necker-Enfants-Malades University Hospital, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
| | - Eloise Thevenet
- Imagine Institute, Biotherapy Clinical Investigation Center, Biotherapy Department, Necker-Enfants-Malades University Hospital, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
| | - Charles-Henry Cottart
- Faculté de Pharmacie de Paris, Université Paris Cité, Paris, France
- Biochemistry Unit, Biology Department, Assistance Publique Hôpitaux de Paris (AP-HP), Necker-Enfants-Malades University Hospital, Paris, France
| | - Florence Moulin
- Pediatric Intensive Care Unit for, Necker-Enfants-Malades University Hospital, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
| | - Juliette Bouchereau
- Reference Center for Inherited Metabolic Diseases, Necker-Enfants-Malades University Hospital, APHP, Imagine Institute, G2M, MetabERN, Paris, France
| | - Anais Brassier
- Reference Center for Inherited Metabolic Diseases, Necker-Enfants-Malades University Hospital, APHP, Imagine Institute, G2M, MetabERN, Paris, France
| | - Jean-Baptiste Arnoux
- Reference Center for Inherited Metabolic Diseases, Necker-Enfants-Malades University Hospital, APHP, Imagine Institute, G2M, MetabERN, Paris, France
| | - Manuel Schiff
- Reference Center for Inherited Metabolic Diseases, Necker-Enfants-Malades University Hospital, APHP, Imagine Institute, G2M, MetabERN, Paris, France
- Medical School, Université Paris Cité, Paris, France
| | - Nathalie Bednarek
- Intensive Care Unit and Competence Center for Inherited Metabolic Diseases, Reims University Hospital, Reims, France
| | - Delphine Lamireau
- Competence Center for Inherited Metabolic Diseases, Pellegrin University Hospital, Bordeaux, France
| | - Alexa Garros
- Competence Center for Inherited Metabolic Diseases, Grenoble Alpes University Hospital, Grenoble, France
| | - Karine Mention
- Reference Center for Inherited Metabolic Diseases, Jeanne de Flandre Hospital, MetabERN, Lille, France
| | - Aline Cano
- Reference Center for Inherited Metabolic Diseases, La Timone University Hospital, MetabERN, Marseille, France
| | - Lionel Finger
- Biochemistry Unit, Biology Department, Troyes Hospital, Troyes, France
| | - Michele Pelosi
- Reference Center for Inherited Metabolic Diseases, Necker-Enfants-Malades University Hospital, APHP, Imagine Institute, G2M, MetabERN, Paris, France
| | | | - Laure Caccavelli
- INSERM U1151, Institut Necker Enfants-Malades (INEM), Paris, France
- Reference Center for Inherited Metabolic Diseases, Necker-Enfants-Malades University Hospital, APHP, Imagine Institute, G2M, MetabERN, Paris, France
| | - Jean-Herlé Raphalen
- Adult Intensive Care Unit, Necker-Enfants-Malades University Hospital, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
| | - Sylvain Renolleau
- Pediatric Intensive Care Unit for, Necker-Enfants-Malades University Hospital, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
- Medical School, Université Paris Cité, Paris, France
| | - Mehdi Oualha
- Pediatric Intensive Care Unit for, Necker-Enfants-Malades University Hospital, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
- Medical School, Université Paris Cité, Paris, France
| | - Pascale de Lonlay
- INSERM U1151, Institut Necker Enfants-Malades (INEM), Paris, France
- Reference Center for Inherited Metabolic Diseases, Necker-Enfants-Malades University Hospital, APHP, Imagine Institute, G2M, MetabERN, Paris, France
- Medical School, Université Paris Cité, Paris, France
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7
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Mand N, Donath C, Leonhardt A, Weber S, Kömhoff M. Case report: Rhabdomyolysis in children in acute and chronic disease-a challenging condition in pediatric emergency medicine. Front Pediatr 2023; 11:1070465. [PMID: 36969298 PMCID: PMC10034202 DOI: 10.3389/fped.2023.1070465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 02/17/2023] [Indexed: 03/29/2023] Open
Abstract
Rhabdomyolysis is a challenging condition in pediatric emergency departments (PED): It ranges from asymptomatic illness with isolated elevation of creatine kinase (CK) levels to a life-threatening condition associated with extreme elevations in CK, electrolyte imbalances, circulatory failure (CF), acute kidney injury (AKI), and multi-organ disease. Most common causes of rhabdomyolysis are viral myositis and trauma, hereditary metabolic myopathies must be considered when facing rhabdomyolysis in early childhood. We report two cases of severe rhabdomyolysis with CF in our PED, thereby summarizing first-line management of rhabdomyolysis.
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Affiliation(s)
- N. Mand
- Pediatric Intensive Care, Department of Pediatrics, Philipps-University Marburg, Marburg, Germany
- Correspondence: N. Mand
| | - C. Donath
- Pediatric Intensive Care, Department of Pediatrics, Philipps-University Marburg, Marburg, Germany
| | - A. Leonhardt
- Pediatric Intensive Care, Department of Pediatrics, Philipps-University Marburg, Marburg, Germany
| | - S. Weber
- Pediatric Nephrology, Department of Pediatrics, Philipps-University Marburg, Marburg, Germany
| | - M. Kömhoff
- Pediatric Nephrology, Department of Pediatrics, Philipps-University Marburg, Marburg, Germany
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8
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Kahraman AB, Karakaya B, Yıldız Y, Kamaci S, Kesici S, Simsek-Kiper PO, Kurt-Sukur ED, Bayrakcı B, Haliloglu G. Two tales of LPIN1 deficiency: from fatal rhabdomyolysis to favorable outcome of acute compartment syndrome. Neuromuscul Disord 2022; 32:931-934. [PMID: 36195520 DOI: 10.1016/j.nmd.2022.06.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 06/03/2022] [Accepted: 06/24/2022] [Indexed: 12/31/2022]
Abstract
LPIN1 deficiency is an autosomal recessive disease caused by biallelic mutations in LPIN1, where impaired fatty acid metabolism leads to stress in skeletal muscle, resulting in severe rhabdomyolysis, often triggered by fever, exercise, fasting, and anesthesia. It is the second most common cause of severe, recurrent episodes of rhabdomyolysis in early childhood which can result in serious morbidity and mortality. To date, 71 patients have been published in 20 clinical studies in the form of case series. We describe two previously unreported cases, one with a novel LPIN1 mutation that resulted in mortality, and another, to the best of our knowledge, with the first reported compartment syndrome managed with a favorable outcome in this disorder. Recognition of the complications including ventricular arrythmias, acute renal failure and compartment syndrome on the severe end of the spectrum may change the outcome and prognosis of this devastating condition.
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Affiliation(s)
- Ayca Burcu Kahraman
- Department of Pediatrics, Division of Metabolism and Nutrition, Hacettepe University Faculty of Medicine, Ankara TR06230, Turkey.
| | - Bekir Karakaya
- Department of Pediatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Yılmaz Yıldız
- Department of Pediatrics, Division of Metabolism and Nutrition, Hacettepe University Faculty of Medicine, Ankara TR06230, Turkey
| | - Saygin Kamaci
- Department of Orthopedics and Travmatology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Selman Kesici
- Division of Intensive Care Unit, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | | | - Eda Didem Kurt-Sukur
- Division of Nephrology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Benan Bayrakcı
- Division of Intensive Care Unit, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Goknur Haliloglu
- Division of Neurology, Hacettepe University Faculty of Medicine, Ankara, Turkey
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9
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Acute Rhabdomyolysis in a Child with Multiple Suspicious Gene Variants. Case Rep Pediatr 2022; 2022:2099827. [PMID: 36193211 PMCID: PMC9526545 DOI: 10.1155/2022/2099827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Accepted: 08/12/2022] [Indexed: 11/17/2022] Open
Abstract
Rhabdomyolysis is diagnosed with creatinine kinase (CK) elevation beyond 1000 U/L or ten times above the normal upper limit. Severe episodes can be fatal from electrolyte imbalance, acute renal failure, and disseminated intravascular coagulation. A 13-month-old child was admitted with a CK of 82,090 U/L in the setting of respiratory tract infection-related hyperthermia of 106.9° farenheit. His medical history was significant for prematurity, dystonia, and recurrent rhabdomyolysis. His home medications clonazepam, clonidine, and baclofen were continued upon admission. He exhibited uncontrolled dystonia despite treatment for dystonia. Therefore, sedative infusions and forced alkaline diuresis were begun to prevent heme pigment-induced renal injury. Despite these interventions, his CK peaked at 145,920 U/L, which is rarely reported in this age group. The patient also developed pulmonary edema despite diuresis and required mechanical ventilation. Sedative infusions were not enough for dystonia management, and he needed the addition of a neuromuscular blocking infusion. He finally responded to these interventions, and the CK normalized after a month. He required a month of mechanical ventilation and two and a half months of hospitalization and extensive rehabilitation. We were able to avert renal replacement therapy despite pulmonary edema and an estimated glomerular filtration rate nadir of 21 mL/min/1.73 m2 based on the bedside Schwartz formula. He made a complete recovery and was discharged home. His growth and development were satisfactory for two years after that event. His extensive diagnostic workup was negative. Unfortunately, he died from septic and cardiogenic shock with mild rhabdomyolysis two years later. Prompt recognition, early institution of appropriate therapies, identification of underlying disease, and triggering events are pivotal in rhabdomyolysis management. Evidence-based guidelines are needed in this context.
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10
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Dogan SA, Giacchin G, Zito E, Viscomi C. Redox Signaling and Stress in Inherited Myopathies. Antioxid Redox Signal 2022; 37:301-323. [PMID: 35081731 DOI: 10.1089/ars.2021.0266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Significance: Reactive oxygen species (ROS) are highly reactive compounds that behave like a double-edged sword; they damage cellular structures and act as second messengers in signal transduction. Mitochondria and endoplasmic reticulum (ER) are interconnected organelles with a central role in ROS production, detoxification, and oxidative stress response. Skeletal muscle is the most abundant tissue in mammals and one of the most metabolically active ones and thus relies mainly on oxidative phosphorylation (OxPhos) to synthesize adenosine triphosphate. The impairment of OxPhos leads to myopathy and increased ROS production, thus affecting both redox poise and signaling. In addition, ROS enter the ER and trigger ER stress and its maladaptive response, which also lead to a myopathic phenotype with mitochondrial involvement. Here, we review the role of ROS signaling in myopathies due to either mitochondrial or ER dysfunction. Recent Advances: Relevant advances have been evolving over the last 10 years on the intricate ROS-dependent pathways that act as modifiers of the disease course in several myopathies. To this end, pathways related to mitochondrial biogenesis, satellite cell differentiation, and ER stress have been studied extensively in myopathies. Critical Issues: The analysis of the chemistry and the exact quantitation, as well as the localization of ROS, are still challenging due to the intrinsic labile nature of ROS and the technical limitations of their sensors. Future Directions: The mechanistic studies of the pathogenesis of mitochondrial and ER-related myopathies offer a unique possibility to discover novel ROS-dependent pathways. Antioxid. Redox Signal. 37, 301-323.
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Affiliation(s)
- Sukru Anil Dogan
- Department of Molecular Biology and Genetics, Center for Life Sciences and Technologies, Bogazici University, Istanbul, Turkey
| | - Giacomo Giacchin
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Ester Zito
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy.,Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy
| | - Carlo Viscomi
- Department of Biomedical Sciences, University of Padova, Padova, Italy
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11
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Akıncı Göktaş Ö, Bektaş Ö, Öz Tunçer G, Birsin Özçakar Z, Talim B, Tuba Eminoğlu F, Teber S. A Rare Pediatric Case of Severe Rhabdomyolysis Owing to Dual Infection. KLINISCHE PADIATRIE 2022; 234:119-122. [PMID: 35255503 DOI: 10.1055/a-1486-7186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AIM We aimed to report a severe and rare pediatric rhabdomyolysis case associated with a dual viral infection. CASE A 13 year-old, healthy girl presented with the complaints of fever, abdominal pain, weakness and dark-colored urine. She was diagnosed with rhabdomyolysis based on clinical signs and laboratory findings. The diagnosis was confirmed by serological tests and real-time polymerase chain reaction for Epstein-Barr virus (EBV) and cytomegalovirus (CMV), respectively. Other potential genetic, metabolic and infectious causes were evaluated meticulously but no evidence was found. This case is also important as it is the first reported case to our knowledge on rhabdomyolysis associated with EBV and CMV co-infection in children. CONCLUSION The presented case experienced tetraplegia due to the severe muscular damage and muscle power returned to normal range after 3 months. This suggests that EBV and CMV may have exert synergistic effects leading to more severe inflammation and degeneration.
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Affiliation(s)
- Özben Akıncı Göktaş
- Department of child neurology, Ankara University Faculty of Medicine, Ankara, Turkey
| | - Ömer Bektaş
- Department of child neurology, Ankara University Faculty of Medicine, Ankara, Turkey
| | - Gökçen Öz Tunçer
- Department of child neurology, Ankara University Faculty of Medicine, Ankara, Turkey
| | - Zeynep Birsin Özçakar
- Department of child nephrology, Ankara University Faculty of Medicine, Ankara, Turkey
| | - Beril Talim
- Department of pediatric pathology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Fatma Tuba Eminoğlu
- Department of Pediatric Metabolic Disseases, Ankara University Faculty of Medicine, Ankara, Turkey
| | - Serap Teber
- Department of child neurology, Ankara University Faculty of Medicine, Ankara, Turkey
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12
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LPIN1 rhabdomyolysis: A single site cohort description and treatment recommendations. Mol Genet Metab Rep 2022; 30:100844. [PMID: 35242575 PMCID: PMC8856908 DOI: 10.1016/j.ymgmr.2022.100844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 01/25/2022] [Indexed: 11/21/2022] Open
Abstract
Individuals with LPIN1 deficiency have early recurrent, life-threatening rhabdomyolysis but the full phenotypic spectrum and optimal treatment of the disorder remains unknown. Here we report the clinical details and treatment outcomes of 6 patients from our health system. The average age of presentation in our cohort was 23.8 months ±11.6 months (range 15–46 months). The average number of days for each hospitalization for this cohort is 11.7±13.2 days. Creatinine kinase (CK) levels peak during our care averaged 607,725 units/L (range 157,000-1,100,000 units/L). We observed that aspartate aminotransferase levels paralleled the CK levels in its elevation and resolution (Pearson's correlation R = 0.995); while alanine aminotransferase paralleled the elevation but lagged in the resolution of CK levels (R = 0.728). Unlike historical accounts, in our patient population, rhabdomyolysis was sometimes seen without inciting viral or traumatic events. We also cared for multiple individuals that had received treatment at other centers. This allowed us to compare multiple practice approaches and led to a standardized Care Recommendations.
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13
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Du X, Zhou H, Liu X, Li Y, Hickford JGH. Sequence Variation in the Bovine Lipin-1 Gene ( LPIN1) and Its Association with Milk Fat and Protein Contents in New Zealand Holstein-Friesian × Jersey (HF × J)-cross Dairy Cows. Animals (Basel) 2021; 11:ani11113223. [PMID: 34827956 PMCID: PMC8614294 DOI: 10.3390/ani11113223] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 11/04/2021] [Accepted: 11/09/2021] [Indexed: 11/16/2022] Open
Abstract
Lipin-1 is known to play a regulatory role in tissues that function in lipid metabolism. In dairy cows, the lipin-1 gene (LPIN1) is highly expressed in the mammary gland, but its function in milk production is less understood. In this study, we used PCR-single strand conformation polymorphism analysis to investigate sequence variation in three regions of bovine LPIN1 in New Zealand Holstein-Friesian × Jersey (HF × J)-cross dairy cows, including part of the 5' non-coding region, the region containing the LPIN1β-spliced exon, and the sixth coding exon that encodes the putative transcriptional activating domain of the protein. No variation was found in the LPIN1β-spliced exon, but two sequence variants containing one single nucleotide polymorphism (SNP) were identified in the 5' non-coding region and four sequence variants containing four non-synonymous SNPs were identified in the sixth coding exon. Among the three common variants of the sixth coding exon, variant C was found to be associated with an increase in milk fat percentage (presence 4.96 ± 0.034% vs. absence 4.81 ± 0.050%; p = 0.006) and milk protein percentage (presence 4.09 ± 0.017% vs. absence 3.99 ± 0.025%; p = 0.001), but no associations (p > 0.01) were detected for milk yield. These results suggest that variation in LPIN1 affect the synthesis of fat and proteins in milk and has potential as a gene-marker to improve milk production traits.
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Affiliation(s)
- Xiaohua Du
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou 730070, China;
| | - Huitong Zhou
- Gene-Marker Laboratory, Faculty of Agriculture and Life Sciences, Lincoln University, Lincoln 7647, New Zealand; (H.Z.); (Y.L.)
| | - Xia Liu
- College of Life Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
- Correspondence: (X.L.); (J.G.H.H.)
| | - Yunhai Li
- Gene-Marker Laboratory, Faculty of Agriculture and Life Sciences, Lincoln University, Lincoln 7647, New Zealand; (H.Z.); (Y.L.)
| | - Jonathan G. H. Hickford
- Gene-Marker Laboratory, Faculty of Agriculture and Life Sciences, Lincoln University, Lincoln 7647, New Zealand; (H.Z.); (Y.L.)
- Correspondence: (X.L.); (J.G.H.H.)
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14
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Hsu WH, Huang YH, Chen PR, Hsieh LS. NLIP and HAD-like Domains of Pah1 and Lipin 1 Phosphatidate Phosphatases Are Essential for Their Catalytic Activities. Molecules 2021; 26:molecules26185470. [PMID: 34576941 PMCID: PMC8470223 DOI: 10.3390/molecules26185470] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Revised: 08/29/2021] [Accepted: 09/07/2021] [Indexed: 01/14/2023] Open
Abstract
Saccharomyces cerevisiae Pah1 phosphatidate phosphatase (PAP) catalyzes the dephosphorylation of phosphatidate to yield diacylglycerol, controlling phospholipids and triacylglycerol metabolisms. Pah1 and human Lipin 1 are intrinsically disordered proteins with 56% and 43% unfolded regions, respectively. Truncation analysis of the conserved and non-conserved regions showed that N- and C-conserved regions are essential for the catalytic activity of Pah1. PAP activities can be detected in the conserved N-terminal Lipin (NLIP) domain and C-terminal Lipin (CLIP)/haloacid dehalogenase (HAD)-like domain of Pah1 and Lipin 1, suggesting that the evolutionarily conserved domains are essential for the catalytic activity. The removal of disordered hydrophilic regions drastically reduced the protein solubility of Pah1. Thioredoxin is an efficient fusion protein for production of soluble NLIP–HAD recombinant proteins in Escherichia coli.
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15
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Wang H, Chan TW, Vashisht AA, Drew BG, Calkin AC, Harris TE, Wohlschlegel JA, Xiao X, Reue K. Lipin 1 modulates mRNA splicing during fasting adaptation in liver. JCI Insight 2021; 6:e150114. [PMID: 34494556 PMCID: PMC8492312 DOI: 10.1172/jci.insight.150114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 07/23/2021] [Indexed: 01/03/2023] Open
Abstract
Lipin 1 regulates cellular lipid homeostasis through roles in glycerolipid synthesis (through phosphatidic acid phosphatase activity) and transcriptional coactivation. Lipin 1-deficient individuals exhibit episodic disease symptoms that are triggered by metabolic stress, such as stress caused by prolonged fasting. We sought to identify critical lipin 1 activities during fasting. We determined that lipin 1 deficiency induces widespread alternative mRNA splicing in liver during fasting, much of which is normalized by refeeding. The role of lipin 1 in mRNA splicing was largely independent of its enzymatic function. We identified interactions between lipin 1 and spliceosome proteins, as well as a requirement for lipin 1 to maintain homeostatic levels of spliceosome small nuclear RNAs and specific RNA splicing factors. In fasted Lpin1-/- liver, we identified a correspondence between alternative splicing of phospholipid biosynthetic enzymes and dysregulated phospholipid levels; splicing patterns and phospholipid levels were partly normalized by feeding. Thus, lipin 1 influences hepatic lipid metabolism through mRNA splicing, as well as through enzymatic and transcriptional activities, and fasting exacerbates the deleterious effects of lipin 1 deficiency on metabolic homeostasis.
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Affiliation(s)
- Huan Wang
- Human Genetics, David Geffen School of Medicine at UCLA
| | | | - Ajay A Vashisht
- Biological Chemistry, University of California, Los Angeles, California, USA
| | - Brian G Drew
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Anna C Calkin
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia.,Central Clinical School, Monash University, Melbourne, Victoria, Australia.,Baker Department of Cardiometabolic Health, University of Melbourne, Parkville, Victoria, Australia
| | - Thurl E Harris
- Pharmacology, University of Virginia, Charlottesville, Virginia, USA
| | - James A Wohlschlegel
- Biological Chemistry, University of California, Los Angeles, California, USA.,Molecular Biology Institute and
| | - Xinshu Xiao
- Bioinformatics Interdepartmental Program and.,Molecular Biology Institute and.,Integrative Biology and Physiology, University of California, Los Angeles, California, USA
| | - Karen Reue
- Human Genetics, David Geffen School of Medicine at UCLA,,Molecular Biology Institute and
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16
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Hamel Y, Mauvais FX, Madrange M, Renard P, Lebreton C, Nemazanyy I, Pellé O, Goudin N, Tang X, Rodero MP, Tuchmann-Durand C, Nusbaum P, Brindley DN, van Endert P, de Lonlay P. Compromised mitochondrial quality control triggers lipin1-related rhabdomyolysis. CELL REPORTS MEDICINE 2021; 2:100370. [PMID: 34467247 PMCID: PMC8385327 DOI: 10.1016/j.xcrm.2021.100370] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 05/18/2021] [Accepted: 07/19/2021] [Indexed: 11/27/2022]
Abstract
LPIN1 mutations are responsible for inherited recurrent rhabdomyolysis, a life-threatening condition with no efficient therapeutic intervention. Here, we conduct a bedside-to-bench-and-back investigation to study the pathophysiology of lipin1 deficiency. We find that lipin1-deficient myoblasts exhibit a reduction in phosphatidylinositol-3-phosphate close to autophagosomes and late endosomes that prevents the recruitment of the GTPase Armus, locks Rab7 in the active state, inhibits vesicle clearance by fusion with lysosomes, and alters their positioning and function. Oxidized mitochondrial DNA accumulates in late endosomes, where it activates Toll-like receptor 9 (TLR9) and triggers inflammatory signaling and caspase-dependent myolysis. Hydroxychloroquine blocks TLR9 activation by mitochondrial DNA in vitro and may attenuate flares of rhabdomyolysis in 6 patients treated. We suggest a critical role for defective clearance of oxidized mitochondrial DNA that activates TLR9-restricted inflammation in lipin1-related rhabdomyolysis. Interventions blocking TLR9 activation or inflammation can improve patient care in vivo.
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Affiliation(s)
- Yamina Hamel
- INSERM, UMR 1163, IMAGINE Institute, Faculté de Médecine, Université de Paris, Paris 75015, France.,Reference Center of Inherited Metabolic Diseases, Université de Paris, Hôpital Universitaire Necker-Enfants Malades, APHP, G2M Steam, metab ERN, Paris 75015, France
| | - François-Xavier Mauvais
- INSERM, Unit 1151, CNRS, UMR 8253, Faculté de Médecine, Université de Paris, Paris 75015, France
| | - Marine Madrange
- INSERM, UMR 1163, IMAGINE Institute, Faculté de Médecine, Université de Paris, Paris 75015, France.,Reference Center of Inherited Metabolic Diseases, Université de Paris, Hôpital Universitaire Necker-Enfants Malades, APHP, G2M Steam, metab ERN, Paris 75015, France
| | - Perrine Renard
- Reference Center of Inherited Metabolic Diseases, Université de Paris, Hôpital Universitaire Necker-Enfants Malades, APHP, G2M Steam, metab ERN, Paris 75015, France.,INSERM, Unit 1151, CNRS, UMR 8253, Faculté de Médecine, Université de Paris, Paris 75015, France
| | - Corinne Lebreton
- INSERM, UMR 1163, IMAGINE Institute, Faculté de Médecine, Université de Paris, Paris 75015, France
| | - Ivan Nemazanyy
- Platform for Metabolic Analyses, INSERM US24/CNRS UMS 3633, Paris 75015, France
| | - Olivier Pellé
- INSERM, UMR 1163, IMAGINE Institute, Faculté de Médecine, Université de Paris, Paris 75015, France.,Cytometry Core Facility, INSERM US24/CNRS UMS3633, Paris 75015, France
| | - Nicolas Goudin
- Imaging Core Facility, INSERM US24/CNRS UMS3633, Paris 75015, France
| | - Xiaoyun Tang
- Cancer Research Institute of Northern Alberta, Department of Biochemistry, University of Alberta, Edmonton, AB, Canada
| | - Mathieu P Rodero
- INSERM, UMR 1163, IMAGINE Institute, Faculté de Médecine, Université de Paris, Paris 75015, France
| | - Caroline Tuchmann-Durand
- INSERM, UMR 1163, IMAGINE Institute, Faculté de Médecine, Université de Paris, Paris 75015, France.,Reference Center of Inherited Metabolic Diseases, Université de Paris, Hôpital Universitaire Necker-Enfants Malades, APHP, G2M Steam, metab ERN, Paris 75015, France
| | - Patrick Nusbaum
- Department of Biology and Molecular Genetics, Cochin Hospital, AP-HP, Paris 75014, France
| | - David N Brindley
- Cancer Research Institute of Northern Alberta, Department of Biochemistry, University of Alberta, Edmonton, AB, Canada
| | - Peter van Endert
- INSERM, Unit 1151, CNRS, UMR 8253, Faculté de Médecine, Université de Paris, Paris 75015, France
| | - Pascale de Lonlay
- INSERM, UMR 1163, IMAGINE Institute, Faculté de Médecine, Université de Paris, Paris 75015, France.,Reference Center of Inherited Metabolic Diseases, Université de Paris, Hôpital Universitaire Necker-Enfants Malades, APHP, G2M Steam, metab ERN, Paris 75015, France
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17
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Gu W, Gao S, Wang H, Fleming KD, Hoffmann RM, Yang JW, Patel NM, Choi YM, Burke JE, Reue K, Airola MV. The middle lipin domain adopts a membrane-binding dimeric protein fold. Nat Commun 2021; 12:4718. [PMID: 34354069 PMCID: PMC8342540 DOI: 10.1038/s41467-021-24929-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 07/13/2021] [Indexed: 02/06/2023] Open
Abstract
Phospholipid synthesis and fat storage as triglycerides are regulated by lipin phosphatidic acid phosphatases (PAPs), whose enzymatic PAP function requires association with cellular membranes. Using hydrogen deuterium exchange mass spectrometry, we find mouse lipin 1 binds membranes through an N-terminal amphipathic helix, the Ig-like domain and HAD phosphatase catalytic core, and a middle lipin (M-Lip) domain that is conserved in mammalian and mammalian-like lipins. Crystal structures of the M-Lip domain reveal a previously unrecognized protein fold that dimerizes. The isolated M-Lip domain binds membranes both in vitro and in cells through conserved basic and hydrophobic residues. Deletion of the M-Lip domain in lipin 1 reduces PAP activity, membrane association, and oligomerization, alters subcellular localization, diminishes acceleration of adipocyte differentiation, but does not affect transcriptional co-activation. This establishes the M-Lip domain as a dimeric protein fold that binds membranes and is critical for full functionality of mammalian lipins.
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Affiliation(s)
- Weijing Gu
- grid.36425.360000 0001 2216 9681Department of Biochemistry and Cell Biology, Stony Brook University, Stony Brook, NY USA
| | - Shujuan Gao
- grid.36425.360000 0001 2216 9681Department of Biochemistry and Cell Biology, Stony Brook University, Stony Brook, NY USA
| | - Huan Wang
- grid.19006.3e0000 0000 9632 6718Department of Human Genetics, David Geffen School of Medicine at UCLA, Los Angeles, CA USA
| | - Kaelin D. Fleming
- grid.143640.40000 0004 1936 9465Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC Canada
| | - Reece M. Hoffmann
- grid.143640.40000 0004 1936 9465Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC Canada
| | - Jong Won Yang
- grid.36425.360000 0001 2216 9681Department of Biochemistry and Cell Biology, Stony Brook University, Stony Brook, NY USA
| | - Nimi M. Patel
- grid.36425.360000 0001 2216 9681Department of Biochemistry and Cell Biology, Stony Brook University, Stony Brook, NY USA
| | - Yong Mi Choi
- grid.36425.360000 0001 2216 9681Department of Biochemistry and Cell Biology, Stony Brook University, Stony Brook, NY USA
| | - John E. Burke
- grid.143640.40000 0004 1936 9465Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC Canada
| | - Karen Reue
- grid.19006.3e0000 0000 9632 6718Department of Human Genetics, David Geffen School of Medicine at UCLA, Los Angeles, CA USA
| | - Michael V. Airola
- grid.36425.360000 0001 2216 9681Department of Biochemistry and Cell Biology, Stony Brook University, Stony Brook, NY USA
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18
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Chambers KT, Cooper MA, Swearingen AR, Brookheart RT, Schweitzer GG, Weinheimer CJ, Kovacs A, Koves TR, Muoio DM, McCommis KS, Finck BN. Myocardial Lipin 1 knockout in mice approximates cardiac effects of human LPIN1 mutations. JCI Insight 2021; 6:134340. [PMID: 33986192 PMCID: PMC8262319 DOI: 10.1172/jci.insight.134340] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 03/31/2021] [Indexed: 11/17/2022] Open
Abstract
Lipin 1 is a bifunctional protein that is a transcriptional regulator and has phosphatidic acid (PA) phosphohydrolase activity, which dephosphorylates PA to generate diacylglycerol. Human lipin 1 mutations lead to episodic rhabdomyolysis, and some affected patients exhibit cardiac abnormalities, including exercise-induced cardiac dysfunction and cardiac triglyceride accumulation. Furthermore, lipin 1 expression is deactivated in failing heart, but the effects of lipin 1 deactivation in myocardium are incompletely understood. We generated mice with cardiac-specific lipin 1 KO (cs-Lpin1-/-) to examine the intrinsic effects of lipin 1 in the myocardium. Cs-Lpin1-/- mice had normal systolic cardiac function but mild cardiac hypertrophy. Compared with littermate control mice, PA content was higher in cs-Lpin1-/- hearts, which also had an unexpected increase in diacylglycerol and triglyceride content. Cs-Lpin1-/- mice exhibited diminished cardiac cardiolipin content and impaired mitochondrial respiration rates when provided with pyruvate or succinate as metabolic substrates. After transverse aortic constriction-induced pressure overload, loss of lipin 1 did not exacerbate cardiac hypertrophy or dysfunction. However, loss of lipin 1 dampened the cardiac ionotropic response to dobutamine and exercise endurance in association with reduced protein kinase A signaling. These data suggest that loss of lipin 1 impairs cardiac functional reserve, likely due to effects on glycerolipid homeostasis, mitochondrial function, and protein kinase A signaling.
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Affiliation(s)
- Kari T Chambers
- Division of Geriatrics and Nutritional Science, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Michael A Cooper
- Division of Geriatrics and Nutritional Science, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Alison R Swearingen
- Division of Geriatrics and Nutritional Science, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Rita T Brookheart
- Division of Geriatrics and Nutritional Science, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - George G Schweitzer
- Division of Geriatrics and Nutritional Science, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Carla J Weinheimer
- Division of Geriatrics and Nutritional Science, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Attila Kovacs
- Division of Geriatrics and Nutritional Science, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Timothy R Koves
- Duke Molecular Physiology Institute and Sarah W. Stedman Nutrition and Metabolism Center, Departments of Medicine and Pharmacology and Cancer Biology, Duke University, Durham, North Carolina, USA
| | - Deborah M Muoio
- Duke Molecular Physiology Institute and Sarah W. Stedman Nutrition and Metabolism Center, Departments of Medicine and Pharmacology and Cancer Biology, Duke University, Durham, North Carolina, USA
| | - Kyle S McCommis
- Department of Biochemistry & Molecular Biology, Saint Louis University School of Medicine, St. Louis, Missouri, USA
| | - Brian N Finck
- Division of Geriatrics and Nutritional Science, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
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19
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Tong K, Yu GS. Acute recurrent rhabdomyolysis in a Chinese boy associated with a novel compound heterozygous LPIN1 variant: a case report. BMC Neurol 2021; 21:42. [PMID: 33514355 PMCID: PMC7844980 DOI: 10.1186/s12883-021-02050-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 01/07/2021] [Indexed: 01/04/2023] Open
Abstract
Background LPIN1-related acute recurrent rhabdomyolysis (RM), first reported in 2008, is an autosomal recessive inherited metabolic disease. In recent years, LPIN1 gene variants have been identified as one of the main causes of severe RM in children in Western countries. The disease is extremely rare in China, and we report a case of acute recurrent RM caused by a novel compound heterozygous LPIN1 variant. Case presentation A 15-year-old Chinese boy presented with myalgia after strenuous exercise, accompanied by transient increases in serum creatine kinase and myoglobin and persistent hyperuricaemia and hyperbilirubinaemia. Genetic analysis using high-throughput genomic sequencing and Sanger sequencing revealed that there was a compound heterozygous variant in the LPIN1 gene of the proband: the paternal c.2047A > G(p.I683V) was an unreported missense variant, and the maternal c.2107_2108 insAGG(p.Q703delin sQE) was an unreported in-frame variant. Conclusions In children with RM, LPIN1 variants should always be considered in the differential diagnosis. The clinical features of our case are atypical, which highlights the importance of an accurate diagnosis by genetic testing. If detected early, the condition may be controlled, and the prognosis may be improved.
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Affiliation(s)
- Ke Tong
- Department of Cardiovascular Disease, Children's Hospital of Chongqing Medical University, 136 Zhongshan 2nd Road, Yuzhong District, Chongqing, 400014, China.,Ministry of Education Key Laboratory of Child Development and Disorders, 136 Zhongshan 2nd Road, Yuzhong District, Chongqing, 400014, China.,National Clinical Research Center for Child Health and Disorders (Chongqing), 136 Zhongshan 2nd Road, Yuzhong District, Chongqing, 400014, China.,China International Science and Technology Cooperation Base of Child Development and Critical Disorders, 136 Zhongshan 2nd Road, Yuzhong District, Chongqing, 400014, China.,Chongqing Key Laboratory of Pediatrics, 136 Zhongshan 2nd Road, Yuzhong District, Chongqing, 400014, China
| | - Geng-Sheng Yu
- Department of Cardiovascular Disease, Children's Hospital of Chongqing Medical University, 136 Zhongshan 2nd Road, Yuzhong District, Chongqing, 400014, China. .,Ministry of Education Key Laboratory of Child Development and Disorders, 136 Zhongshan 2nd Road, Yuzhong District, Chongqing, 400014, China. .,National Clinical Research Center for Child Health and Disorders (Chongqing), 136 Zhongshan 2nd Road, Yuzhong District, Chongqing, 400014, China. .,China International Science and Technology Cooperation Base of Child Development and Critical Disorders, 136 Zhongshan 2nd Road, Yuzhong District, Chongqing, 400014, China. .,Chongqing Key Laboratory of Pediatrics, 136 Zhongshan 2nd Road, Yuzhong District, Chongqing, 400014, China.
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20
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Lu S, Lyu Z, Wang Z, Kou Y, Liu C, Li S, Hu M, Zhu H, Wang W, Zhang C, Kuan YS, Liu YW, Chen J, Tian J. Lipin 1 deficiency causes adult-onset myasthenia with motor neuron dysfunction in humans and neuromuscular junction defects in zebrafish. Theranostics 2021; 11:2788-2805. [PMID: 33456573 PMCID: PMC7806489 DOI: 10.7150/thno.53330] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 12/12/2020] [Indexed: 12/03/2022] Open
Abstract
Lipin 1 is an intracellular protein acting as a phosphatidic acid phosphohydrolase enzyme controlling lipid metabolism. Human recessive mutations in LPIN1 cause recurrent, early-onset myoglobinuria, a condition normally associated with muscle pain and weakness. Whether and how lipin 1 deficiency in humans leads to peripheral neuropathy is yet unclear. Herein, two novel compound heterozygous mutations in LPIN1 with neurological disorders, but no myoglobinuria were identified in an adult-onset syndromic myasthenia family. The present study sought to explore the pathogenic mechanism of LPIN1 in muscular and neural development. Methods: The clinical diagnosis of the proband was compared to the known 48 cases of LPIN1 recessive homozygous mutations. Whole-exome sequencing was carried out on the syndromic myasthenia family to identify the causative gene. The pathogenesis of lipin 1 deficiency during somitogenesis and neurogenesis was investigated using the zebrafish model. Whole-mount in situ hybridization, immunohistochemistry, birefringence analysis, touch-evoke escape response and locomotion assays were performed to observe in vivo the changes in muscles and neurons. The conservatism of the molecular pathways regulated by lipin 1 was evaluated in human primary glioblastoma and mouse myoblast cells by siRNA knockdown, drug treatment, qRT-PCR and Western blotting analysis. Results: The patient exhibited adult-onset myasthenia accompanied by muscle fiber atrophy and nerve demyelination without myoglobinuria. Two novel heterozygous mutations, c.2047A>C (p.I683L) and c.2201G>A (p.R734Q) in LPIN1, were identified in the family and predicted to alter the tertiary structure of LPIN1 protein. Lipin 1 deficiency in zebrafish embryos generated by lpin1 morpholino knockdown or human LPIN1 mutant mRNA injections reproduced the myotomes defects, a reduction both in primary motor neurons and secondary motor neurons projections, morphological changes of post-synaptic clusters of acetylcholine receptors, and myelination defects, which led to reduced touch-evoked response and abnormalities of swimming behaviors. Loss of lipin 1 function in zebrafish and mammalian cells also exhibited altered expression levels of muscle and neuron markers, as well as abnormally enhanced Notch signaling, which was partially rescued by the specific Notch pathway inhibitor DAPT. Conclusions: These findings pointed out that the compound heterozygous mutations in human LPIN1 caused adult-onset syndromic myasthenia with peripheral neuropathy. Moreover, zebrafish could be used to model the neuromuscular phenotypes due to the lipin 1 deficiency, where a novel pathological role of over-activated Notch signaling was discovered and further confirmed in mammalian cell lines.
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21
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Kruijt N, van den Bersselaar LR, Kamsteeg EJ, Verbeeck W, Snoeck MMJ, Everaerd DS, Abdo WF, Jansen DRM, Erasmus CE, Jungbluth H, Voermans NC. The etiology of rhabdomyolysis: an interaction between genetic susceptibility and external triggers. Eur J Neurol 2020; 28:647-659. [PMID: 32978841 PMCID: PMC7821272 DOI: 10.1111/ene.14553] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 09/09/2020] [Indexed: 01/04/2023]
Abstract
Background and purpose Rhabdomyolysis is a medical emergency characterized by acute skeletal muscle breakdown with a sudden rise and subsequent fall of serum creatine kinase (CK) levels. Rhabdomyolysis events are provoked by exposure to external triggers, possibly in combination with an increased genetic susceptibility. We aimed to describe comprehensively the external triggers and potentially pathogenic genetic variants possibly implicated in increased rhabdomyolysis susceptibility. Methods We performed a retrospective single‐center study, including a total of 1302 patients with an acute CK level exceeding 2000 IU/l. Results Anoxia was the most frequently reported trigger (40%). A subset of 193 patients were clinically suspected of an underlying genetic disorder (recurrent episodes, a positive family history, very high or persistently increased CK levels). In 72 of these patients, an unequivocal genetic defect was identified. A total of 22 genes with pathogenic variants were identified, including 52 different variants. Of those, 11 genes have been previously associated with rhabdomyolysis (ACADVL, ANO5, CPT2, DMD, DYSF, FKRP, HADHA, PGM1, LPIN1, PYGM, RYR1). Eleven genes are probably implicated in increased susceptibility (including AGL, CAPN3, CNBP, DMPK, MAGT1, ACADM, SCN4A, SGCA, SGCG, SMPD1, TANGO2). Conclusion These findings suggest that the spectrum of genetic susceptibility for rhabdomyolysis has not yet been completely clarified. With the increasing availability of next‐generation sequencing in a diagnostic setting, we expect that in more cases a genetic defect will be identified.
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Affiliation(s)
- N Kruijt
- Department of Neurology, Radboudumc, Nijmegen, The Netherlands
| | - L R van den Bersselaar
- Department of Neurology, Radboudumc, Nijmegen, The Netherlands.,Malignant Hyperthermia Investigation Unit, Canisius Wilhelmina Hospital, Nijmegen, The Netherlands
| | - E J Kamsteeg
- Department of Human Genetics, Radboud Institute for Health Sciences, Radboudumc, Nijmegen, The Netherlands
| | - W Verbeeck
- Department of Pharmacology and Toxicology, Radboudumc, Nijmegen, The Netherlands.,Vincent van Gogh Institute for Psychiatry, Venlo, Venray, The Netherlands
| | - M M J Snoeck
- Malignant Hyperthermia Investigation Unit, Canisius Wilhelmina Hospital, Nijmegen, The Netherlands
| | - D S Everaerd
- Department of Psychiatry, Radboudumc, Nijmegen, The Netherlands
| | - W F Abdo
- Department of Intensive Care Medicine, Radboudumc, Nijmegen, The Netherlands
| | - D R M Jansen
- Department of Geriatrics, Radboudumc, Nijmegen, The Netherlands
| | - C E Erasmus
- Department of Neurology, Radboudumc, Nijmegen, The Netherlands.,Department of Paediatrics, Radboudumc, Nijmegen, The Netherlands
| | - H Jungbluth
- Randall Division for Cell and Molecular Biophysics, Muscle Signalling Section, King's College, London, UK.,Department of Basic and Clinical Neuroscience, IoPPN, King's College, London, UK.,Department of Paediatric Neurology, Neuromuscular Service, Guy's and St Thomas' Hospital NHS Foundation Trust, Evelina Children's Hospital, London, UK
| | - N C Voermans
- Department of Neurology, Radboudumc, Nijmegen, The Netherlands
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22
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Ramani Sattiraju S, Jama A, Alshudukhi AA, Edward Townsend N, Reynold Miranda D, Reese RR, Voss AA, Ren H. Loss of membrane integrity drives myofiber death in lipin1-deficient skeletal muscle. Physiol Rep 2020; 8:e14620. [PMID: 33113595 PMCID: PMC7592881 DOI: 10.14814/phy2.14620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 09/30/2020] [Indexed: 11/24/2022] Open
Abstract
Mutations in lipin1 are suggested to be a common cause of massive rhabdomyolysis episodes in children; however, the molecular mechanisms involved in the regulation of myofiber death caused by the absence of lipin1 are not fully understood. Loss of membrane integrity is considered as an effective inducer of cell death in muscular dystrophy. In this study, we utilized a mouse line with selective homozygous lipin1 deficiency in the skeletal muscle (Lipin1Myf5cKO ) to determine the role of compromised membrane integrity in the myofiber death in lipin1-deficient muscles. We found that Lipin1Myf5cKO muscles had significantly elevated proapoptotic factors (Bax, Bak, and cleaved caspase-9) and necroptotic proteins such as RIPK1, RIPK3, and MLKL compared with WT mice. Moreover, Lipin1Myf5cKO muscle had significantly higher membrane disruptions, as evidenced by increased IgG staining and elevated uptake of Evans Blue Dye (EBD) and increased serum creatine kinase activity in Lipin1Myf5cKO muscle fibers. EBD-positive fibers were strongly colocalized with apoptotic or necroptotic myofibers, suggesting an association between compromised plasma membrane integrity and cell death pathways. We further show that the absence of lipin1 leads to a significant decrease in the absolute and specific muscle force (normalized to muscle mass). Our work indicates that apoptosis and necroptosis are associated with a loss of membrane integrity in Lipin1Myf5cKO muscle and that myofiber death and dysfunction may cause a decrease in contractile force.
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Affiliation(s)
| | - Abdulrahman Jama
- Department of Biochemistry and Molecular BiologyWright State UniversityDaytonOHUSA
| | | | | | | | - Rebecca R Reese
- Department of Biochemistry and Molecular BiologyWright State UniversityDaytonOHUSA
| | - Andrew A. Voss
- Department of Biological SciencesWright State UniversityDaytonOHUSA
| | - Hongmei Ren
- Department of Biochemistry and Molecular BiologyWright State UniversityDaytonOHUSA
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23
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Lutkewitte AJ, Finck BN. Regulation of Signaling and Metabolism by Lipin-mediated Phosphatidic Acid Phosphohydrolase Activity. Biomolecules 2020; 10:E1386. [PMID: 33003344 PMCID: PMC7600782 DOI: 10.3390/biom10101386] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 09/23/2020] [Accepted: 09/24/2020] [Indexed: 12/15/2022] Open
Abstract
Phosphatidic acid (PA) is a glycerophospholipid intermediate in the triglyceride synthesis pathway that has incredibly important structural functions as a component of cell membranes and dynamic effects on intracellular and intercellular signaling pathways. Although there are many pathways to synthesize and degrade PA, a family of PA phosphohydrolases (lipin family proteins) that generate diacylglycerol constitute the primary pathway for PA incorporation into triglycerides. Previously, it was believed that the pool of PA used to synthesize triglyceride was distinct, compartmentalized, and did not widely intersect with signaling pathways. However, we now know that modulating the activity of lipin 1 has profound effects on signaling in a variety of cell types. Indeed, in most tissues except adipose tissue, lipin-mediated PA phosphohydrolase activity is far from limiting for normal rates of triglyceride synthesis, but rather impacts critical signaling cascades that control cellular homeostasis. In this review, we will discuss how lipin-mediated control of PA concentrations regulates metabolism and signaling in mammalian organisms.
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Affiliation(s)
| | - Brian N. Finck
- Center for Human Nutrition, Division of Geriatrics and Nutritional Sciences, Department of Medicine, Washington University School of Medicine, Euclid Avenue, Campus Box 8031, St. Louis, MO 63110, USA;
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24
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Finsterer J, Aliyev R. Detection of compound heterozygous variants in LPIN1 does not necessarily imply pathogenicity in a patient with rhabdomyolysis. F1000Res 2020; 9:15. [PMID: 32913636 PMCID: PMC7429921 DOI: 10.12688/f1000research.21589.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/07/2020] [Indexed: 11/23/2022] Open
Abstract
In a recent article by Yim
et al., a 15-month-old male is described who experienced severe rhabdomyolysis with a creatine-kinase value (CKV) of 127494 U/l one day after intramuscular injection of an unidentified drug by the general practitioner. Rhabdomyolysis was not attributed to this injected drug but to compound heterozygous variants in LPIN1. The study has a number of shortcomings. Triggers of rhabdomyolysis should be unequivocally identified, a more extensive family history should be taken, and previous CKVs should be provided. Functional and biochemical tests should be carried out to confirm or exclude pathogenicity of the LPIN1 variants.
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Affiliation(s)
- Josef Finsterer
- Neurological Department, Krankenanstalt Rudolfstiftung, Messerli Institute, Vienna, 1180, Austria
| | - Rahim Aliyev
- Department of Neurology and Clinical Neurophysiology, Azerbaijan State Advanced Training Institute for Doctors named after A. Aliyev, Baku, Azerbaijan
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25
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Kaur B, Rattalino M. Target-controlled infusion of Propofol and Remifentanil in a child with recurrent rhabdomyolysis secondary to LPIN1 deficiency. Paediatr Anaesth 2020; 30:726-727. [PMID: 33210425 DOI: 10.1111/pan.13887] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 04/07/2020] [Accepted: 04/13/2020] [Indexed: 12/29/2022]
Affiliation(s)
- Balvindar Kaur
- Department of Anaesthesia and Pain Management, The Royal Children's Hospital Melbourne, Parkville, Vic., Australia
| | - Marcos Rattalino
- Department of Anaesthesia and Pain Management, The Royal Children's Hospital Melbourne, Parkville, Vic., Australia
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26
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Pons L, Acquaviva-Bourdain C, Teyssedre S, Didier C, Veauville A, Steffann J, Gobin S, de Lonlay P, Guffon N, Fouilhoux A. Intrafamilial Variability in LPIN1-Related Rhabdomyolysis. Mol Syndromol 2020. [DOI: 10.1159/000507719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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27
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Lipin-1 Deficiency-Associated Recurrent Rhabdomyolysis and Exercise-Induced Myalgia Persisting into Adulthood: A Case Report and Review of Literature. Case Rep Med 2020; 2020:7904190. [PMID: 32549891 PMCID: PMC7275236 DOI: 10.1155/2020/7904190] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 03/08/2020] [Accepted: 03/12/2020] [Indexed: 12/18/2022] Open
Abstract
Phosphatidate phosphatase-1 (lipin-1) is encoded by LPIN1 gene. Lipin-1 deficiency has been reported as the second most common cause of early-onset rhabdomyolysis after primary fatty acid oxidation disorders. We report a case of a 32-year-old Sri Lankan female with a history of more than 10 episodes of rhabdomyolysis and exercise intolerance since childhood. These episodes were triggered by infections and exercise. A temporal relationship between the acute episodes and use of drugs such as theophylline, mefenamic acid, co-trimoxazole, and combined oral contraceptive pills was also noted. There was marked elevation of serum creatine kinase and transaminases during acute episodes. Family history revealed parental consanguinity and an affected sibling who died of an acute episode associated with muscle weakness, dark coloured urine, and cyanosis, at the age of 2 years. The histochemical findings of the patient under discussion were consistent with a metabolic myopathy affecting membrane integrity. A homozygous, likely pathogenic variant c.1684G>T encoding p.(Glu562∗) was identified by clinical exome sequencing. Even though the studies to date give no convincing evidence of a possible causal or contributory relationship between the drugs under discussion and lipin-1 related rhabdomyolysis, this case highlights the importance of pharmacovigilance and reporting adverse drug reactions in patients with lipin-1 deficiency.
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28
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Pizzamiglio C, Lahiri N, Nirmalananthan N, Sood B, Somalanka S, Ostrowski P, Phadke R, O'Donovan DG, Muntoni F, Quinlivan R. First presentation of LPIN1 acute rhabdomyolysis in adolescence and adulthood. Neuromuscul Disord 2020; 30:566-571. [PMID: 32522502 DOI: 10.1016/j.nmd.2020.05.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 05/12/2020] [Accepted: 05/14/2020] [Indexed: 02/08/2023]
Abstract
LPIN1 mutations are a known common cause of autosomal recessive, recurrent and life-threatening acute rhabdomyolysis of childhood-onset. The first episode of rhabdomyolysis usually happens in nearly all cases before the age of 5 and death is observed in 1/3 of patients. Here we present two cases of acute rhabdomyolysis with a milder phenotype caused by LPIN1 mutation presenting in adolescence (11 years old) and adulthood (40 years old) after Parvovirus infection and metabolic stress, respectively. In our opinion, the mutation types, epigenetic factors, the environment exposition to triggers or the existence of proteins with a similar structure of LPIN1, may have a role in modulating the onset of rhabdomyolysis. LPIN1 should be included on a panel of genes analysed in the investigation of adult individuals with rhabdomyolysis. Metabolic and viral stressors should be included in the list of possible rhabdomyolysis precipitant.
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Affiliation(s)
- Chiara Pizzamiglio
- MRC Centre for Neuromuscular Diseases, UCL Institute of Neurology and National Hospital for Neurology and Neurosurgery, Queen Square, London, United Kingdom.
| | - Nayana Lahiri
- Clinical Genetics Department, St George's University Hospitals NHS Foundation Trust, London, United Kingdom
| | - Niranjanan Nirmalananthan
- Departments of Neurology and Neuroradiology, Atkinson Morley Regional Neurosciences Centre, St George's Hospital, London, United Kingdom
| | - Bhrigu Sood
- South West Thames Renal and Transplantation Unit and South West Thames Institute for Renal Research, Saint Helier Hospital, Carshalton, Surrey, United Kingdom
| | - Subash Somalanka
- South West Thames Renal and Transplantation Unit and South West Thames Institute for Renal Research, Saint Helier Hospital, Carshalton, Surrey, United Kingdom
| | - Philip Ostrowski
- South West Thames Regional Genetics Service, St George's University NHS Foundation Trust, London, United Kingdom
| | - Rahul Phadke
- Division of Neuropathology, Dubowitz Neuromuscular Centre, UCL Great Ormond Street Hospital for Children, United Kingdom; Division of Neuropathology, National Hospital for Neurology and Neurosurgery, Queen Square, London, United Kingdom
| | - Dominic Gerard O'Donovan
- Neuropathology, Department of Histopathology, Addenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge, United Kingdom
| | - Francesco Muntoni
- Paediatric Neurology, Dubowitz Neuromuscular Centre, UCL Institute of Child Health and Great Ormond Street Hospital for Children, London, United Kingdom
| | - Rosaline Quinlivan
- MRC Centre for Neuromuscular Diseases, UCL Institute of Neurology and National Hospital for Neurology and Neurosurgery, Queen Square, London, United Kingdom
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29
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A rare case of pediatric recurrent rhabdomyolysis with compound heterogenous variants in the LPIN1. BMC Pediatr 2020; 20:218. [PMID: 32410653 PMCID: PMC7222443 DOI: 10.1186/s12887-020-02134-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 05/11/2020] [Indexed: 11/10/2022] Open
Abstract
Background Lipin-1, encoded by LPIN1 gene, serves as an enzyme and a transcriptional co-regulator to regulate lipid metabolism and mitochondrial respiratory chain. Autosomal recessive mutations in LPIN1 were recognized as one of the most common causes of pediatric recurrent rhabdomyolysis in western countries. However, to date, there were only a few cases reported in Asian group. This study aims to report the first pediatric case of recurrent rhabdomyolysis with a novel LPIN1 mutation in China mainland in order to raise the awareness of both pediatricians and patients. Case presentations Here we report a Chinese pediatric case of recurrent rhabdomyolysis with compound heterozygous variants (p.Arg388* and p.Arg810Cys) in the LPIN1 gene. The c.2428C > T was a novel missense variant involved Arg-to-Cys substitution at position 810 (p.Arg810Cys), located in the highly conserved region which predicted to be damaging by multiple algorithms. The patient manifested as cola-colored urine, muscle weakness and tenderness, as well as acute kidney injury with peak blood creatine kinase level 109,570 U/l in 19-month old. In his second episode of 9 years old, the symtoms were relatively milder with peak creatine kinase level 50,948 U/l. He enjoyed quite normal life between the bouts but slightly elevation of serum creatine kinase level during the fever or long-term exercises. Prolonged weight training combined with calorie deprivation were speculated to be the triggers of his illness. Prompt symptomatic therapy including fluid therapy and nutritional support was given and the patient recovered soon. Conclusions LPIN1-related rhabdomyolysis is still quite new to physicians due to its seemly low-incidence especially in Asian countries. In the future, more active genetic test strategy and detailed prophylactic care education should be taken in patients with severe recurrent rhabdomyolysis, who are the high risk group of LPIN1 genetic defects.
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30
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Crystal structure of a lipin/Pah phosphatidic acid phosphatase. Nat Commun 2020; 11:1309. [PMID: 32161260 PMCID: PMC7066176 DOI: 10.1038/s41467-020-15124-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 02/20/2020] [Indexed: 12/12/2022] Open
Abstract
Lipin/Pah phosphatidic acid phosphatases (PAPs) generate diacylglycerol to regulate triglyceride synthesis and cellular signaling. Inactivating mutations cause rhabdomyolysis, autoinflammatory disease, and aberrant fat storage. Disease-mutations cluster within the conserved N-Lip and C-Lip regions that are separated by 500-residues in humans. To understand how the N-Lip and C-Lip combine for PAP function, we determined crystal structures of Tetrahymena thermophila Pah2 (Tt Pah2) that directly fuses the N-Lip and C-Lip. Tt Pah2 adopts a two-domain architecture where the N-Lip combines with part of the C-Lip to form an immunoglobulin-like domain and the remaining C-Lip forms a HAD-like catalytic domain. An N-Lip C-Lip fusion of mouse lipin-2 is catalytically active, which suggests mammalian lipins function with the same domain architecture as Tt Pah2. HDX-MS identifies an N-terminal amphipathic helix essential for membrane association. Disease-mutations disrupt catalysis or destabilize the protein fold. This illustrates mechanisms for lipin/Pah PAP function, membrane association, and lipin-related pathologies. Lipin/Pah phosphatidic acid phosphatases generate diacylglycerol to regulate triglyceride synthesis and cellular signaling. Here authors determine structures of Tetrahymena thermophila Pah2 and identify an N-terminal amphipathic helix essential for membrane association.
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Wang G, Zhou H, Gong H, He J, Luo Y, Hickford JGH, Hu J, Wang J, Liu X, Li S. Variation in the Lipin 1 Gene Is Associated with Birth Weight and Selected Carcass Traits in New Zealand Romney Sheep. Animals (Basel) 2020; 10:ani10020237. [PMID: 32028610 PMCID: PMC7071029 DOI: 10.3390/ani10020237] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 01/23/2020] [Accepted: 01/30/2020] [Indexed: 11/16/2022] Open
Abstract
Lipin 1 plays an important role in lipid metabolism. In this study; we searched for variation in the ovine lipin 1 gene (LPIN1) in three gene regions (a 5' non-coding region; a region containing an alternatively spliced exon in intron 4; and a region containing coding exon 6) using polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP) analysis. The greatest amount of alleles was found in coding exon 6; with five sequences being detected. The effect of variation in this exon was investigated in 242 New Zealand Romney lambs derived from 12 sire-lines. The presence of variant E3 was associated with a decrease in birth weight (p = 0.005) and the proportion of leg yield (p = 0.045), but with an increase in hot carcass weight (p = 0.032) and the proportion of loin yield (p = 0.014). The presence of variant B3 was associated with an increased pre-weaning growth rate (p = 0.041), whereas the presence of variant C3 was associated with an increase in shoulder yield (p < 0.001). These results suggest that ovine LPIN1 variation may have value as a genetic marker for improving meat production and carcass traits.
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Affiliation(s)
- Guan Wang
- Gansu Key Laboratory of Herbivorous Animal Biotechnology, Faculty of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
- International Wool Research Institute, Gansu Agricultural University, Lanzhou 730070, China
| | - Huitong Zhou
- Gansu Key Laboratory of Herbivorous Animal Biotechnology, Faculty of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
- International Wool Research Institute, Gansu Agricultural University, Lanzhou 730070, China
- Gene-Marker Laboratory, Faculty of Agriculture and Life Sciences, Lincoln University, Lincoln 7647, New Zealand
| | - Hua Gong
- International Wool Research Institute, Gansu Agricultural University, Lanzhou 730070, China
- Gene-Marker Laboratory, Faculty of Agriculture and Life Sciences, Lincoln University, Lincoln 7647, New Zealand
| | - Jianning He
- College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China
| | - Yuzhu Luo
- Gansu Key Laboratory of Herbivorous Animal Biotechnology, Faculty of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
- International Wool Research Institute, Gansu Agricultural University, Lanzhou 730070, China
| | - Jon G H Hickford
- International Wool Research Institute, Gansu Agricultural University, Lanzhou 730070, China
- Gene-Marker Laboratory, Faculty of Agriculture and Life Sciences, Lincoln University, Lincoln 7647, New Zealand
| | - Jiang Hu
- Gansu Key Laboratory of Herbivorous Animal Biotechnology, Faculty of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
- International Wool Research Institute, Gansu Agricultural University, Lanzhou 730070, China
| | - Jiqing Wang
- Gansu Key Laboratory of Herbivorous Animal Biotechnology, Faculty of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
- International Wool Research Institute, Gansu Agricultural University, Lanzhou 730070, China
| | - Xiu Liu
- Gansu Key Laboratory of Herbivorous Animal Biotechnology, Faculty of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
- International Wool Research Institute, Gansu Agricultural University, Lanzhou 730070, China
| | - Shaobin Li
- Gansu Key Laboratory of Herbivorous Animal Biotechnology, Faculty of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
- International Wool Research Institute, Gansu Agricultural University, Lanzhou 730070, China
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A rare case of adult onset LPIN1 associated rhabdomyolysis. Neuromuscul Disord 2020; 30:241-245. [PMID: 32115342 DOI: 10.1016/j.nmd.2020.01.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 01/11/2020] [Accepted: 01/22/2020] [Indexed: 01/17/2023]
Abstract
Pathogenic variants in LPIN1 are a recognised cause of severe and often fatal rhabdomyolysis in childhood. We present a rare case of adult onset recurrent rhabdomyolysis due to compound heterozygous variants in LPIN1. Despite first presenting with rhabdomyolysis in his twenties and having undergone extensive investigations, the patient did not receive a diagnosis until he was 46 years of age. DNA sequencing revealed a pathogenic deletion involving exon 18 of LPIN1 in conjunction with a c.2410G>A missense variant in exon 19. Whilst LPIN1 variants are a noteworthy cause of severe recurrent rhabdomyolysis in childhood, this is the first detailed description and only the second reported case of adult onset rhabdomyolysis. Variants in LPIN1 should be considered as a cause of recurrent severe rhabdomyolysis in adults when other more common causes have been excluded.
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Balboa MA, de Pablo N, Meana C, Balsinde J. The role of lipins in innate immunity and inflammation. Biochim Biophys Acta Mol Cell Biol Lipids 2019; 1864:1328-1337. [DOI: 10.1016/j.bbalip.2019.06.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 05/07/2019] [Accepted: 06/01/2019] [Indexed: 02/08/2023]
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Raaschou-Pedersen D, Madsen KL, Stemmerik MG, Eisum ASV, Straub V, Vissing J. Fat oxidation is impaired during exercise in lipin-1 deficiency. Neurology 2019; 93:e1433-e1438. [PMID: 31492716 DOI: 10.1212/wnl.0000000000008240] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 05/10/2019] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To investigate substrate metabolism during exercise in an adult with lipin-1 deficiency, an inherited defect in lipid homeostasis, and to study the effect of glucose supplementation on his exercise tolerance. METHODS We studied a 48-year-old man with lipin-1 deficiency and 2 healthy men. The patient has exercise intolerance and monthly episodes of rhabdomyolysis. All participants performed a submaximal exercise test while total fatty acid oxidation (FAO) and palmitate oxidation rate were assessed by stable isotope technique and indirect calorimetry. On another day, the patient was infused with 10% glucose (410 mL/h) and repeated the exercise. On the third and fourth visits, he was randomized in a double-blind manner to drink a supplement of glucose (soft drink 2% concentration) or placebo (soft drink: aspartame, acesulfame-K) before and during exercise. RESULTS Mean FAO and palmitate oxidation rate during exercise were lower in the patient vs controls: 431 vs 1,271 and 1912 μmol/min and 122 vs 191 and 212 μmol/min. Plasma fatty acid concentration was lower in the patient during exercise than in controls: 477 vs 643 and 630 μmol/L. The patient's exercise duration increased from 36 to 60 minutes with IV glucose and 46 minutes with oral glucose, and his rating of exertion dropped from 15 to 9 on average (Borg scale). CONCLUSION In this adult lipin-1-deficient patient, FAO was reduced, which was associated with no increase in plasma free fatty acids during submaximal exercise, and his exercise capacity improved with continuous ingestion of high-dose glucose. CLINICALTRIALSGOV IDENTIFIER NCT02635269.
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Affiliation(s)
- Daniel Raaschou-Pedersen
- From the Copenhagen Neuromuscular Center (D.R.-P., K.L.M., M.G.S., A.-S.V.E., J.V.), Department of Neurology, Rigshospitalet, University of Copenhagen, Denmark; John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University; and Newcastle Hospitals NHS Foundation Trust (V.S.), UK.
| | - Karen L Madsen
- From the Copenhagen Neuromuscular Center (D.R.-P., K.L.M., M.G.S., A.-S.V.E., J.V.), Department of Neurology, Rigshospitalet, University of Copenhagen, Denmark; John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University; and Newcastle Hospitals NHS Foundation Trust (V.S.), UK
| | - Mads G Stemmerik
- From the Copenhagen Neuromuscular Center (D.R.-P., K.L.M., M.G.S., A.-S.V.E., J.V.), Department of Neurology, Rigshospitalet, University of Copenhagen, Denmark; John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University; and Newcastle Hospitals NHS Foundation Trust (V.S.), UK
| | - Anne-Sofie V Eisum
- From the Copenhagen Neuromuscular Center (D.R.-P., K.L.M., M.G.S., A.-S.V.E., J.V.), Department of Neurology, Rigshospitalet, University of Copenhagen, Denmark; John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University; and Newcastle Hospitals NHS Foundation Trust (V.S.), UK
| | - Volker Straub
- From the Copenhagen Neuromuscular Center (D.R.-P., K.L.M., M.G.S., A.-S.V.E., J.V.), Department of Neurology, Rigshospitalet, University of Copenhagen, Denmark; John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University; and Newcastle Hospitals NHS Foundation Trust (V.S.), UK
| | - John Vissing
- From the Copenhagen Neuromuscular Center (D.R.-P., K.L.M., M.G.S., A.-S.V.E., J.V.), Department of Neurology, Rigshospitalet, University of Copenhagen, Denmark; John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University; and Newcastle Hospitals NHS Foundation Trust (V.S.), UK
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35
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Yim SW, Chan TYC, Belaramani KM, Man SS, Wong FCK, Chen SPL, Lee HHC, Mak CM, Ching CK. Case Report: The first probable Hong Kong Chinese case of LPIN1-related acute recurrent rhabdomyolysis in a boy with two novel variants. F1000Res 2019; 8:1566. [PMID: 31723421 PMCID: PMC6823901 DOI: 10.12688/f1000research.20343.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/22/2019] [Indexed: 01/18/2023] Open
Abstract
Recurrent rhabdomyolysis is frequently ascribed to fatty acid ß-oxidation defects, mitochondrial respiratory chain disorders and glycogen storage-related diseases. In recent years, autosomal recessive
LPIN1 mutations have been identified as a prevailing cause of severe rhabdomyolysis in children in Western countries. We report the first probable Hong Kong Chinese case of recurrent severe rhabdomyolysis in early childhood caused by
LPIN1 variants. Compound heterozygous novel variants NM_145693.2(LPIN1):c.[1949_1967dupGTGTCACCACGCAGTACCA]; [2410G>C] (p.[Gly657Cysfs*12];[Asp804His]) were detected. The former variant was classified as likely pathogenic while the latter variant was classified as a variant of uncertain significance (VUS) based on the guideline published by the American College of Medical Genetics and Genomics (ACMG) in 2015. Although the genetic findings were inconclusive, the patient’s presentation was compatible with LPIN1-related acute recurrent rhabdomyolysis, and the patient was treated as such. The early recognition, timely diagnosis and management of this condition are important to avoid fatal consequences. To our knowledge, there has been no previous report in the English-language literature of a child with Chinese ethnicity and
LPIN1-related acute recurrent rhabdomyolysis (MIM #268200). Functional characterization of the novel variants detected in this study are warranted in future studies.
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Affiliation(s)
- Sau Wing Yim
- Department of Paediatrics and Adolescent Medicine, Tuen Mun Hospital, Tuen Mun, Hong Kong.,Chemical Pathology Laboratory, Department of Pathology, Hong Kong Children's Hospital, Kowloon Bay, Hong Kong
| | - Tina Yee Ching Chan
- Kowloon West Cluster Laboratory Genetic Service, Chemical Pathology Laboratory, Department of Pathology, Princess Margaret Hospital, Hong Kong, Laichikok, Hong Kong
| | - Kiran M Belaramani
- Department of Paediatrics and Adolescent Medicine, Tuen Mun Hospital, Tuen Mun, Hong Kong.,Chemical Pathology Laboratory, Department of Pathology, Hong Kong Children's Hospital, Kowloon Bay, Hong Kong
| | - Sze Shun Man
- Department of Paediatrics and Adolescent Medicine, Tuen Mun Hospital, Tuen Mun, Hong Kong.,Chemical Pathology Laboratory, Department of Pathology, Hong Kong Children's Hospital, Kowloon Bay, Hong Kong
| | - Felix Chi Kin Wong
- Department of Chemical Pathology, Prince of Wales Hospital, Shatin, Hong Kong
| | - Sammy Pak Lam Chen
- Kowloon West Cluster Laboratory Genetic Service, Chemical Pathology Laboratory, Department of Pathology, Princess Margaret Hospital, Hong Kong, Laichikok, Hong Kong.,Chemical Pathology Laboratory, Department of Pathology, Queen Elizabeth Hospital, Kowloon, Hong Kong
| | - Hencher Han Chih Lee
- Kowloon West Cluster Laboratory Genetic Service, Chemical Pathology Laboratory, Department of Pathology, Princess Margaret Hospital, Hong Kong, Laichikok, Hong Kong
| | - Chloe Miu Mak
- Chemical Pathology Laboratory, Department of Pathology, Hong Kong Children's Hospital, Kowloon Bay, Hong Kong.,Kowloon West Cluster Laboratory Genetic Service, Chemical Pathology Laboratory, Department of Pathology, Princess Margaret Hospital, Hong Kong, Laichikok, Hong Kong
| | - Chor Kwan Ching
- Kowloon West Cluster Laboratory Genetic Service, Chemical Pathology Laboratory, Department of Pathology, Princess Margaret Hospital, Hong Kong, Laichikok, Hong Kong
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Suri NA, Meehan CW, Melwani A. A Healthy Toddler With Fever and Lethargy. Pediatrics 2019; 143:peds.2018-0412. [PMID: 30952780 DOI: 10.1542/peds.2018-0412] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/18/2018] [Indexed: 11/24/2022] Open
Abstract
A 21-month-old previously healthy girl presented to the emergency department initially with fever, rhinorrhea, and poor oral intake. She was subsequently discharged from the hospital on amoxicillin for treatment of acute otitis media but presented hours later on the same day with continued poor oral intake, decreased urine output, and lethargy. The patient was afebrile on examination without a focal source of infection or evidence of meningismus, but she was lethargic and minimally responsive to pain and had reduced strength in the upper and lower extremities. Initial laboratory analysis revealed leukocytosis with a neutrophil predominance and bandemia, hyponatremia, mild hyperkalemia, hyperglycemia, elevated transaminases, a mild metabolic acidosis, glucosuria, ketonuria, and hematuria. Follow-up tests, based on the history and results of the initial tests, were sent and led to a surprising diagnosis.
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Affiliation(s)
- Neha A Suri
- Department of Pediatrics, Children's National Health System, Washington, District of Columbia
| | - Colleen W Meehan
- Department of Pediatrics, Children's National Health System, Washington, District of Columbia
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37
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Reue K, Wang H. Mammalian lipin phosphatidic acid phosphatases in lipid synthesis and beyond: metabolic and inflammatory disorders. J Lipid Res 2019; 60:728-733. [PMID: 30804008 PMCID: PMC6446709 DOI: 10.1194/jlr.s091769] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 02/15/2019] [Indexed: 12/12/2022] Open
Abstract
The regulation of cellular lipid storage and membrane lipid composition plays a critical role in metabolic homeostasis, and dysregulation may contribute to disorders such as obesity, fatty liver, type 2 diabetes, and cardiovascular disease. The mammalian lipin proteins (lipin 1, lipin 2, and lipin 3) are phosphatidic acid phosphatase (PAP) enzymes that modulate levels of cellular triacylglycerols and phospholipids, and also regulate lipid intermediates in cellular signaling pathways. Lipin proteins also have the ability to coactivate/corepress transcription. In humans and mice, lipin gene mutations cause severe metabolic phenotypes including rhabdomyolysis (lipin 1), autoinflammatory disease (lipin 2), and impaired intestinal lipoprotein assembly (lipin 2/lipin 3). Characterization of these diseases has revealed roles for lipin PAP activity in fundamental cellular processes such as autophagy, inflammasome activation, and lipoprotein assembly. Lipin protein activity is regulated at pre- and posttranscriptional levels, which suggests a need for their ordered response to specific physiological stimuli. Challenges for the future include better elucidation of the unique biochemical and physiological properties of individual lipin family members and determination of lipin protein structure-function relationships. Further research may propel exploration of lipin proteins as viable therapeutic targets in metabolic or inflammatory disorders.
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Affiliation(s)
- Karen Reue
- Department of Human Genetics, David Geffen School of Medicine, and the Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA 90095
| | - Huan Wang
- Department of Human Genetics, David Geffen School of Medicine, and the Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA 90095.
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38
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Stepien KM, Schmidt WM, Bittner RE, O'Toole O, McNamara B, Treacy EP. Long-term outcomes in a 25-year-old female affected with lipin-1 deficiency. JIMD Rep 2019; 46:4-10. [PMID: 31240148 PMCID: PMC6498837 DOI: 10.1002/jmd2.12016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 01/04/2019] [Indexed: 12/19/2022] Open
Abstract
Lipin-1 is a phosphatidic acid phosphohydrolase (EC 3.1.3.4) that catalyzes the dephosphorylation of phosphatidic acid to diacylglycerol and inorganic phosphate. Deficiency of this enzyme causes potentially fatal severe, recurrent episodes of rhabdomyolysis triggered by infection. The defect has only recently been recognized so little is known about the long-term outcome in adult patients with this disorder. We report the course and outcome of a 25-year-old female patient with lipin-1 deficiency after a recent episode of rhabdomyolysis requiring intensive care admission with a peak creatine kinase of 500 000 IU/L. One-year post discharge from intensive care, the patient has residual drop foot bilaterally consistent with bilateral common peroneal neuropathies in addition to a background residual distal myopathy.
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Affiliation(s)
- Karolina M. Stepien
- Mark Holland Metabolic Unit, Adult Inherited Metabolic DiseasesSalford Royal NHS Foundation TrustSalfordUnited Kingdom
| | - Wolfgang M. Schmidt
- Neuromuscular Research DepartmentCenter for Anatomy and Cell Biology, Medical University of ViennaViennaAustria
| | - Reginald E. Bittner
- Neuromuscular Research DepartmentCenter for Anatomy and Cell Biology, Medical University of ViennaViennaAustria
| | - Orna O'Toole
- Department of NeurologyMercy University HospitalCorkIreland
| | - Brian McNamara
- Department of Clinical NeurophysiologyCork University HospitalCorkIreland
| | - Eileen P. Treacy
- University College DublinDublinIreland
- Paediatrics DepartmentTrinity CollegeDublinIreland
- National Centre for Inherited Metabolic DiseasesThe Mater Misericordiae University HospitalDublinIreland
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39
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Rashid T, Nemazanyy I, Paolini C, Tatsuta T, Crespin P, de Villeneuve D, Brodesser S, Benit P, Rustin P, Baraibar MA, Agbulut O, Olivier A, Protasi F, Langer T, Chrast R, de Lonlay P, de Foucauld H, Blaauw B, Pende M. Lipin1 deficiency causes sarcoplasmic reticulum stress and chaperone-responsive myopathy. EMBO J 2019; 38:e99576. [PMID: 30420558 PMCID: PMC6315296 DOI: 10.15252/embj.201899576] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 09/21/2018] [Accepted: 10/02/2018] [Indexed: 12/20/2022] Open
Abstract
As a consequence of impaired glucose or fatty acid metabolism, bioenergetic stress in skeletal muscles may trigger myopathy and rhabdomyolysis. Genetic mutations causing loss of function of the LPIN1 gene frequently lead to severe rhabdomyolysis bouts in children, though the metabolic alterations and possible therapeutic interventions remain elusive. Here, we show that lipin1 deficiency in mouse skeletal muscles is sufficient to trigger myopathy. Strikingly, muscle fibers display strong accumulation of both neutral and phospholipids. The metabolic lipid imbalance can be traced to an altered fatty acid synthesis and fatty acid oxidation, accompanied by a defect in acyl chain elongation and desaturation. As an underlying cause, we reveal a severe sarcoplasmic reticulum (SR) stress, leading to the activation of the lipogenic SREBP1c/SREBP2 factors, the accumulation of the Fgf21 cytokine, and alterations of SR-mitochondria morphology. Importantly, pharmacological treatments with the chaperone TUDCA and the fatty acid oxidation activator bezafibrate improve muscle histology and strength of lipin1 mutants. Our data reveal that SR stress and alterations in SR-mitochondria contacts are contributing factors and potential intervention targets of the myopathy associated with lipin1 deficiency.
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Affiliation(s)
- Talha Rashid
- Institut Necker-Enfants Malades, Paris, France
- Inserm, U1151, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
- Sanofi R&D, Translational Sciences Unit, In Silico Biology, Chilly-Mazarin, France
| | - Ivan Nemazanyy
- Platform for Metabolic Analyses, Institut Necker-Enfants Malades, Paris, France
| | - Cecilia Paolini
- Center for Research on Ageing and Translational Medicine (CeSI-MeT), Department of Neuroscience, Imaging, and Clinical Sciences (DNICS), University G. d' Annunzio of Chieti, Chieti, Italy
| | - Takashi Tatsuta
- Max-Planck-Institute for Biology of Ageing, Cologne, Germany
| | - Paul Crespin
- Institut Necker-Enfants Malades, Paris, France
- Inserm, U1151, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Delphine de Villeneuve
- Institut Necker-Enfants Malades, Paris, France
- Inserm, U1151, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Susanne Brodesser
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Paule Benit
- INSERM, UMR 1141, Hôpital Robert Debré, Paris, France
| | - Pierre Rustin
- INSERM, UMR 1141, Hôpital Robert Debré, Paris, France
| | | | - Onnik Agbulut
- CNRS, Institut de Biologie Paris-Seine (IBPS), Biological Adaptation and Ageing, Sorbonne Université, Paris, France
| | - Anne Olivier
- Sanofi R&D, Translational Sciences Unit, In Silico Biology, Chilly-Mazarin, France
| | - Feliciano Protasi
- Center for Research on Ageing and Translational Medicine (CeSI-MeT), Department of Neuroscience, Imaging, and Clinical Sciences (DNICS), University G. d' Annunzio of Chieti, Chieti, Italy
| | - Thomas Langer
- Max-Planck-Institute for Biology of Ageing, Cologne, Germany
| | - Roman Chrast
- Department of Neuroscience and Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Pascale de Lonlay
- Institut Necker-Enfants Malades, Paris, France
- Inserm, U1151, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Helene de Foucauld
- Sanofi R&D, Translational Sciences Unit, In Silico Biology, Chilly-Mazarin, France
| | - Bert Blaauw
- Department of Biomedical Sciences, Venetian Institute of Molecular Medicine, University of Padova, Padova, Italy
| | - Mario Pende
- Institut Necker-Enfants Malades, Paris, France
- Inserm, U1151, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
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Jama A, Huang D, Alshudukhi AA, Chrast R, Ren H. Lipin1 is required for skeletal muscle development by regulating MEF2c and MyoD expression. J Physiol 2018; 597:889-901. [PMID: 30511745 DOI: 10.1113/jp276919] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 12/03/2018] [Indexed: 12/19/2022] Open
Abstract
KEY POINTS Lipin1 is critical for skeletal muscle development. Lipin1 regulates MyoD and myocyte-specific enhancer factor 2C (MEF2c) expression via the protein kinase C (PKC)/histone deacetylase 5-mediated pathway. Inhibition of PKCμ activity suppresses myoblast differentiation by inhibiting MyoD and MEF2c expression. ABSTRACT Our previous characterization of global lipin1-deficient (fld) mice demonstrated that lipin1 played a novel role in skeletal muscle (SM) regeneration. The present study using cell type-specific Myf5-cre;Lipin1fl/fl conditional knockout mice (Lipin1Myf5cKO ) shows that lipin1 is a major determinant of SM development. Lipin1 deficiency induced reduced muscle mass and myopathy. Our results from lipin1-deficient myoblasts suggested that lipin1 regulates myoblast differentiation via the protein kinase Cμ (PKCμ)/histone deacetylase 5 (HDAC5)/myocyte-specific enhancer factor 2C (MEF2c):MyoD-mediated pathway. Lipin1 deficiency leads to the suppression of PKC isoform activities, as well as inhibition of the downstream target of PKCμ, class II deacetylase HDAC5 nuclear export, and, consequently, inhibition of MEF2c and MyoD expression in the SM of lipin1Myf5cKO mice. Restoration of diacylglycerol-mediated signalling in lipin1 deficient myoblasts by phorbol 12-myristate 13-acetate transiently activated PKC and HDAC5, and upregulated MEF2c expression. Our findings provide insights into the signalling circuitry that regulates SM development, and have important implications for developing intervention aimed at treating muscular dystrophy.
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Affiliation(s)
- Abdulrahman Jama
- Department of Biochemistry and Molecular Biology, Wright State University, Dayton, OH, USA
| | - Dengtong Huang
- Department of Biochemistry and Molecular Biology, Wright State University, Dayton, OH, USA
| | - Abdullah A Alshudukhi
- Department of Biochemistry and Molecular Biology, Wright State University, Dayton, OH, USA
| | - Roman Chrast
- Department of Neuroscience and Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Hongmei Ren
- Department of Biochemistry and Molecular Biology, Wright State University, Dayton, OH, USA
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Cortés R, Kleinsteuber K, Paz Vargas C, de Los Ángeles Avaria M. Miopatías metabólicas. REVISTA MÉDICA CLÍNICA LAS CONDES 2018. [DOI: 10.1016/j.rmclc.2018.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Sellers RS, Mahmood SR, Perumal GS, Macaluso FP, Kurland IJ. Phenotypic Modulation of Skeletal Muscle Fibers in LPIN1-Deficient Lipodystrophic ( fld) Mice. Vet Pathol 2018; 56:322-331. [PMID: 30381013 DOI: 10.1177/0300985818809126] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Lipin-1 ( Lpin1)-deficient lipodystrophic mice have scant and immature adipocytes and develop transient fatty liver early in life. Unlike normal mice, these mice cannot rely on stored triglycerides to generate adenosine triphosphate (ATP) from the β-oxidation of fatty acids during periods of fasting. To compensate, these mice store much higher amounts of glycogen in skeletal muscle and liver than wild-type mice in order to support energy needs during periods of fasting. Our studies demonstrated that there are phenotypic changes in skeletal muscle fibers that reflect an adaptation to this unique metabolic situation. The phenotype of skeletal muscle (soleus, gastrocnemius, plantaris, and extensor digitorum longus [EDL]) from Lpin1-/- was evaluated using various methods including immunohistochemistry for myosin heavy chains (Myh) 1, 2, 2a, 2b, and 2x; enzyme histochemistry for myosin ATPase, cytochrome-c oxidase (COX), and succinyl dehydrogenase (SDH); periodic acid-Schiff; and transmission electron microscopy. Fiber-type changes in the soleus muscle of Lpin1-/- mice were prominent and included decreased Myh1 expression with concomitant increases in Myh2 expression and myosin-ATPase activity; this change was associated with an increase in the presence of Myh1/2a or Myh1/2x hybrid fibers. Alterations in mitochondrial enzyme activity (COX and SDH) were apparent in the myofibers in the soleus, gastrocnemius, plantaris, and EDL muscles. Electron microscopy revealed increases in the subsarcolemmal mitochondrial mass in the muscles of Lpin1-/- mice. These data demonstrate that lipin-1 deficiency results in phenotypic fiber-specific modulation of skeletal muscle necessary for compensatory fuel utilization adaptations in lipodystrophy.
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Affiliation(s)
- Rani S Sellers
- 1 Department of Pathology, Albert Einstein College of Medicine, Bronx, NY, USA.,Current address: Drug Safety and Research Development, Pfizer, Inc, Pearl River, NY, USA
| | - S Radma Mahmood
- 1 Department of Pathology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Geoffrey S Perumal
- 2 Analytical Imaging Facility, Albert Einstein Cancer Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Frank P Macaluso
- 2 Analytical Imaging Facility, Albert Einstein Cancer Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Irwin J Kurland
- 3 Department of Medicine (Endocrinology), Albert Einstein College of Medicine, Bronx, NY, USA
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43
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Cortés R, Kleinsteuber K, Vargas CP, de Los Ángeles Avaria M. Rabdomiólisis metabólica: actualización. REVISTA MÉDICA CLÍNICA LAS CONDES 2018. [DOI: 10.1016/j.rmclc.2018.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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44
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A putative NEM1 homologue regulates lipid droplet biogenesis via PAH1 in Tetrahymena thermophila. J Biosci 2018. [DOI: 10.1007/s12038-018-9794-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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45
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Lin IH, Chang JL, Hua K, Huang WC, Hsu MT, Chen YF. Skeletal muscle in aged mice reveals extensive transformation of muscle gene expression. BMC Genet 2018; 19:55. [PMID: 30089464 PMCID: PMC6083496 DOI: 10.1186/s12863-018-0660-5] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 07/26/2018] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Aging leads to decreased skeletal muscle function in mammals and is associated with a progressive loss of muscle mass, quality and strength. Age-related muscle loss (sarcopenia) is an important health problem associated with the aged population. RESULTS We investigated the alteration of genome-wide transcription in mouse skeletal muscle tissue (rectus femoris muscle) during aging using a high-throughput sequencing technique. Analysis revealed significant transcriptional changes between skeletal muscles of mice at 3 (young group) and 24 (old group) months of age. Specifically, genes associated with energy metabolism, cell proliferation, muscle myosin isoforms, as well as immune functions were found to be altered. We observed several interesting gene expression changes in the elderly, many of which have not been reported before. CONCLUSIONS Those data expand our understanding of the various compensatory mechanisms that can occur with age, and further will assist in the development of methods to prevent and attenuate adverse outcomes of aging.
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Affiliation(s)
- I-Hsuan Lin
- VYM Genome Research Center, National Yang-Ming University, Taipei, 112, Taiwan
| | - Junn-Liang Chang
- Department of Pathology & Laboratory Medicine, Taoyuan Armed Forces General Hospital, Taoyuan, 325, Taiwan
| | - Kate Hua
- VYM Genome Research Center, National Yang-Ming University, Taipei, 112, Taiwan
| | - Wan-Chen Huang
- The Ph.D. Program for Translational Medicine, College of Medical Science and Technology, Taipei Medical University, No.250, Wu-Hsing Street, Taipei, 11031, Taiwan
| | - Ming-Ta Hsu
- Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei, 112, Taiwan
| | - Yi-Fan Chen
- The Ph.D. Program for Translational Medicine, College of Medical Science and Technology, Taipei Medical University, No.250, Wu-Hsing Street, Taipei, 11031, Taiwan.
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46
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Schweitzer GG, Collier SL, Chen Z, McCommis KS, Pittman SK, Yoshino J, Matkovich SJ, Hsu FF, Chrast R, Eaton JM, Harris TE, Weihl CC, Finck BN. Loss of lipin 1-mediated phosphatidic acid phosphohydrolase activity in muscle leads to skeletal myopathy in mice. FASEB J 2018; 33:652-667. [PMID: 30028636 DOI: 10.1096/fj.201800361r] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Lipin 1 regulates glycerolipid homeostasis by acting as a phosphatidic acid phosphohydrolase (PAP) enzyme in the triglyceride-synthesis pathway and by regulating transcription factor activity. Mutations in human lipin 1 are a common cause of recurrent rhabdomyolysis in children. Mice with constitutive whole-body lipin 1 deficiency have been used to examine mechanisms connecting lipin 1 deficiency to myocyte injury. However, that mouse model is confounded by lipodystrophy not phenocopied in people. Herein, 2 muscle-specific mouse models were studied: 1) Lpin1 exon 3 and 4 deletion, resulting in a hypomorphic protein without PAP activity, but which preserved transcriptional coregulatory function; and 2) Lpin1 exon 7 deletion, resulting in total protein loss. In both models, skeletal muscles exhibited a chronic myopathy with ongoing muscle fiber necrosis and regeneration and accumulation of phosphatidic acid and, paradoxically, diacylglycerol. Additionally, lipin 1-deficient mice had abundant, but abnormal, mitochondria likely because of impaired autophagy. Finally, these mice exhibited increased plasma creatine kinase following exhaustive exercise when unfed. These data suggest that mice lacking lipin 1-mediated PAP activity in skeletal muscle may serve as a model for determining the mechanisms by which lipin 1 deficiency leads to myocyte injury and for testing potential therapeutic approaches.-Schweitzer, G. G., Collier, S. L., Chen, Z., McCommis, K. S., Pittman, S. K., Yoshino, J., Matkovich, S. J., Hsu, F.-F., Chrast, R., Eaton, J. M., Harris, T. E., Weihl, C. C., Finck, B. N. Loss of lipin 1-mediated phosphatidic acid phosphohydrolase activity in muscle leads to skeletal myopathy in mice.
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Affiliation(s)
- George G Schweitzer
- Division of Geriatrics and Nutritional Sciences, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Sara L Collier
- Division of Geriatrics and Nutritional Sciences, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Zhouji Chen
- Division of Geriatrics and Nutritional Sciences, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Kyle S McCommis
- Division of Geriatrics and Nutritional Sciences, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Sara K Pittman
- Department of Neurology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Jun Yoshino
- Division of Geriatrics and Nutritional Sciences, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Scot J Matkovich
- Cardiovascular Division, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Fong-Fu Hsu
- Division of Endocrinology, Metabolism, and Lipid Research, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Roman Chrast
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden; and.,Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden; and
| | - James M Eaton
- Department of Pharmacology, University of Virginia, Charlottesville, Virginia, USA
| | - Thurl E Harris
- Department of Pharmacology, University of Virginia, Charlottesville, Virginia, USA
| | - Conrad C Weihl
- Department of Neurology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Brian N Finck
- Division of Geriatrics and Nutritional Sciences, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
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Pillai AN, Shukla S, Gautam S, Rahaman A. Small phosphatidate phosphatase (TtPAH2) of Tetrahymena complements respiratory function and not membrane biogenesis function of yeast PAH1. J Biosci 2018; 42:613-621. [PMID: 29229879 DOI: 10.1007/s12038-017-9712-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Phosphatidate phosphatases (PAH) play a central role in lipid metabolism and intracellular signaling. Herein, we report the presence of a low-molecular-weight PAH homolog in the single-celled ciliate Tetrahymena thermophila. In vitro phosphatase assay showed that TtPAH2 belongs to the magnesium-dependent phosphatidate phosphatase (PAP1) family. Loss of function of TtPAH2 did not affect the growth of Tetrahymena. Unlike other known PAH homologs, TtPAH2 did not regulate lipid droplet number and ER morphology. TtPAH2 did not rescue growth and ER/nuclear membrane defects of the pah1Δ yeast cells, suggesting that the phosphatidate phosphatase activity of the protein is not sufficient to perform these cellular functions. Surprisingly, TtPAH2 complemented the respiratory defect in the pah1Δ yeast cells indicating a specific role of TtPAH2 in respiration. Overall, our results indicate that TtPAH2 possesses the minimal function of PAH protein family in respiration. We suggest that the amino acid sequences absent from TtPAH2 but present in all other known PAH homologs are critical for lipid homeostasis and membrane biogenesis.
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Affiliation(s)
- Anoop Narayana Pillai
- National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, Khurda 752 050, India
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Alshudukhi AA, Zhu J, Huang D, Jama A, Smith JD, Wang QJ, Esser KA, Ren H. Lipin-1 regulates Bnip3-mediated mitophagy in glycolytic muscle. FASEB J 2018; 32:6796-6807. [PMID: 29939786 DOI: 10.1096/fj.201800374] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Autophagy of mitochondria (mitophagy) is essential for maintaining muscle mass and healthy skeletal muscle. Patients with heritable phosphatidic acid phosphatase lipin-1-null mutations present with severe rhabdomyolysis and muscle atrophy in glycolytic muscle fibers, which are accompanied with mitochondrial aggregates and reduced mitochondrial cytochrome c oxidase activity. However, the underlying mechanisms leading to muscle atrophy as a result of lipin-1 deficiency are still not clear. In this study, we found that lipin-1 deficiency in mice is associated with a marked accumulation of abnormal mitochondria and autophagic vacuoles in glycolytic muscle fibers. Our studies using lipin-1-deficient myoblasts suggest that lipin-1 participates in B-cell leukemia (BCL)-2 adenovirus E1B 19 kDa protein-interacting protein 3 (Bnip3)-regulated mitophagy by interacting with microtubule-associated protein 1A/1B-light chain (LC)3, which is an important step in the recruitment of mitochondria to nascent autophagosomes. The requirement of lipin-1 for Bnip3-mediated mitophagy was further verified in vivo in lipin-1-deficient green fluorescent protein-LC3 transgenic mice (lipin-1-/--GFP-LC3). Finally, we showed that lipin-1 deficiency in mice resulted in defective mitochondrial adaptation to starvation-induced metabolic stress and impaired contractile muscle force in glycolytic muscle fibers. In summary, our study suggests that deregulated mitophagy arising from lipin-1 deficiency is associated with impaired muscle function and may contribute to muscle rhabdomyolysis in humans.-Alshudukhi, A. A., Zhu, J., Huang, D., Jama, A., Smith, J. D., Wang, Q. J., Esser, K. A., Ren, H. Lipin-1 regulates Bnip3-mediated mitophagy in glycolytic muscle.
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Affiliation(s)
- Abdullah A Alshudukhi
- Department of Biochemistry and Molecular Biology, Wright State University, Dayton, Ohio, USA
| | - Jing Zhu
- Cardiovascular Research Center, University of Kentucky, Lexington, Kentucky, USA
| | - Dengtong Huang
- Department of Biochemistry and Molecular Biology, Wright State University, Dayton, Ohio, USA
| | - Abdulrahman Jama
- Department of Biochemistry and Molecular Biology, Wright State University, Dayton, Ohio, USA
| | - Jeffrey D Smith
- Department of Biosystems and Agricultural Engineering, University of Kentucky, Lexington, Kentucky, USA
| | - Qing Jun Wang
- Department of Ophthalmology and Visual Sciences, University of Kentucky, Lexington, Kentucky, USA
| | - Karyn A Esser
- Myology Institute, College of Medicine, University of Florida, Gainesville, Florida, USA
| | - Hongmei Ren
- Department of Biochemistry and Molecular Biology, Wright State University, Dayton, Ohio, USA
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Fan X, Weng Y, Bai Y, Wang Z, Wang S, Zhu J, Zhang F. Lipin-1 determines lung cancer cell survival and chemotherapy sensitivity by regulation of endoplasmic reticulum homeostasis and autophagy. Cancer Med 2018; 7:2541-2554. [PMID: 29659171 PMCID: PMC6010863 DOI: 10.1002/cam4.1483] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 02/15/2018] [Accepted: 03/13/2018] [Indexed: 12/14/2022] Open
Abstract
Cancer cells undergo comprehensive metabolic reprogramming to meet the increased requirements of energy and building blocks for proliferation. Lipin-1, a phosphatidic acid phosphatase converting phosphatidic acid (PA) to diacylglycerol (DAG), is upregulated in lung adenocarcinoma (LUAD) cell lines and tumor tissues. In this study, we reveal high lipin-1 expression is correlated with poor prognosis of patients with LUAD. Knockdown of lipin-1 decreases cell viability and proliferation in LUAD cells, whereas it has less effect on nontumorigenic lung cells. Autophagy and ER stress play important roles in tumor initiation and progression. Lipin-1 knockdown induces the initiation of autophagy while disrupts formation of autolysosome. Lipin-1 silencing induces the activation of ER stress through the IRE1α pathway. Furthermore, we demonstrate disrupted ER homeostasis contributes to the cell phenotype, and the elevated autophagy initiation is due to the ER stress in part. For the first time, we show lack of lipin-1 enhances the sensitivity of LUAD cells to cisplatin treatment. Our results suggest that lipin-1 is a potential target, alone or combined with other treatment, for lung cancer therapy.
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Affiliation(s)
- Xueyu Fan
- Core FacilityDepartment of Clinical LaboratoryQuzhou People's HospitalQuzhou, ZhejiangChina
| | - Yuanyuan Weng
- Core FacilityDepartment of Clinical LaboratoryQuzhou People's HospitalQuzhou, ZhejiangChina
| | - Yongfeng Bai
- Core FacilityDepartment of Clinical LaboratoryQuzhou People's HospitalQuzhou, ZhejiangChina
| | - Zongpan Wang
- Department of OncologyQuzhou People's HospitalQuzhou, ZhejiangChina
| | - Siwei Wang
- Core FacilityDepartment of Clinical LaboratoryQuzhou People's HospitalQuzhou, ZhejiangChina
- Department of PharmacologyQuzhou People's HospitalQuzhou, ZhejiangChina
| | - Jin Zhu
- Core FacilityDepartment of Clinical LaboratoryQuzhou People's HospitalQuzhou, ZhejiangChina
| | - Feng Zhang
- Core FacilityDepartment of Clinical LaboratoryQuzhou People's HospitalQuzhou, ZhejiangChina
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50
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Legendre A, Khraiche D, Ou P, Mauvais FX, Madrange M, Guemann AS, Jais JP, Bonnet D, Hamel Y, de Lonlay P. Cardiac function and exercise adaptation in 8 children with LPIN1 mutations. Mol Genet Metab 2018; 123:375-381. [PMID: 29325813 DOI: 10.1016/j.ymgme.2017.12.429] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 12/13/2017] [Accepted: 12/13/2017] [Indexed: 01/01/2023]
Abstract
INTRODUCTION Lipin-1 deficiency is a major cause of rhabdomyolysis that are precipitated by febrile illness. The prognosis is poor, with one-third of patients dying from cardiac arrest during a crisis episode. Apart from acute rhabdomyolysis, most patients are healthy, showing normal clinical and cardiac ultrasound parameters. PATIENTS AND METHODS We report cardiac and exercise examinations of 8 children carrying two LPIN1 mutations. The examinations were performed outside of a myolysis episode, but one patient presented with fever during one examination. RESULTS All but one patient displayed normal resting cardiac function, as determined by echocardiography. One patient exhibited slight left ventricular dysfunction at rest and a lack of increased stroke volume during cycle ramp exercise. During exercise, peripheral muscle adaptation was impaired in 2 patients compared to healthy controls: they presented an abnormal increase in cardiac output relative to oxygen uptake: dQ/dVO2=8.2 and 9.5 (>2DS of controls population). One patient underwent 2 exercise tests; during one test, the patient was febrile, leading to acute rhabdomyolysis in the following hours. He exhibited changes in recovery muscle reoxygenation parameters and an increased dQ/dVO2 during exercise compared with that under normothermia (7.9 vs 6), which did not lead to acute rhabdomyolysis. The four patients assessed by cardiac 1H-magnetic resonance spectroscopy exhibited signs of intracardiac steatosis. CONCLUSION We observed abnormal haemodynamic profiles during exercise in 3/8 patients with lipin-1 deficiency, suggesting impaired muscle oxidative phosphorylation during exercise. Fever appeared to be an aggravating factor. One patient exhibited moderate cardiac dysfunction, which was possibly related to intracardiac stored lipid toxicity.
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Affiliation(s)
- Antoine Legendre
- Pediatric Cardiology, Centre de Référence des Malformations Cardiaques Congénitales Complexes-M3C, Necker Hospital for Sick Children, Paris, France.
| | - Diala Khraiche
- Pediatric Cardiology, Centre de Référence des Malformations Cardiaques Congénitales Complexes-M3C, Necker Hospital for Sick Children, Paris, France
| | - Phalla Ou
- Pediatric Cardiology, Centre de Référence des Malformations Cardiaques Congénitales Complexes-M3C, Necker Hospital for Sick Children, Paris, France; Department of Radiology, Hospital Bichat, APHP, University Paris Diderot, Paris, France
| | - François-Xavier Mauvais
- Reference Centre of Inherited Metabolic Diseases, Hospital Necker Enfants Malades, APHP, Institute Imagine, University Paris Descartes, Paris, France; Institut National de la Sante et de la Recherche Médicale, Unité 1151, Paris 75015, France
| | - Marine Madrange
- Reference Centre of Inherited Metabolic Diseases, Hospital Necker Enfants Malades, APHP, Institute Imagine, University Paris Descartes, Paris, France
| | - Anne-Sophie Guemann
- Reference Centre of Inherited Metabolic Diseases, Hospital Necker Enfants Malades, APHP, Institute Imagine, University Paris Descartes, Paris, France
| | - Jean-Philippe Jais
- Université Paris Descartes, Department of Biostatistics and Medical Informatics, Paris, France
| | - Damien Bonnet
- Pediatric Cardiology, Centre de Référence des Malformations Cardiaques Congénitales Complexes-M3C, Necker Hospital for Sick Children, Paris, France; Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Yamina Hamel
- Reference Centre of Inherited Metabolic Diseases, Hospital Necker Enfants Malades, APHP, Institute Imagine, University Paris Descartes, Paris, France
| | - Pascale de Lonlay
- Reference Centre of Inherited Metabolic Diseases, Hospital Necker Enfants Malades, APHP, Institute Imagine, University Paris Descartes, Paris, France
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