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Akinci G, Alyaarubi S, Patni N, Alhashmi N, Al-Shidhani A, Prodam F, Gagne N, Babalola F, Al Senani A, Muniraj K, Elsayed SM, Beghini M, Saydam BO, Allawati M, Vaishnav MS, Can E, Simsir IY, Sorkina E, Dursun F, Kamrath C, Cavdar U, Chakraborty PP, Dogan OA, Al Hosin A, Al Maimani A, Comunoglu N, Hamed A, Huseinbegovic T, Scherer T, Curtis J, Brown RJ, Topaloglu H, Simha V, Wabitsch M, Tuysuz B, Oral EA, Akinci B, Garg A. Metabolic and other morbid complications in congenital generalized lipodystrophy type 4. Am J Med Genet A 2024; 194:e63533. [PMID: 38234231 PMCID: PMC11060913 DOI: 10.1002/ajmg.a.63533] [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: 10/08/2023] [Revised: 12/10/2023] [Accepted: 12/13/2023] [Indexed: 01/19/2024]
Abstract
Morbidity and mortality rates in patients with autosomal recessive, congenital generalized lipodystrophy type 4 (CGL4), an ultra-rare disorder, remain unclear. We report on 30 females and 16 males from 10 countries with biallelic null variants in CAVIN1 gene (mean age, 12 years; range, 2 months to 41 years). Hypertriglyceridemia was seen in 79% (34/43), hepatic steatosis in 82% (27/33) but diabetes mellitus in only 21% (8/44). Myopathy with elevated serum creatine kinase levels (346-3325 IU/L) affected all of them (38/38). 39% had scoliosis (10/26) and 57% had atlantoaxial instability (8/14). Cardiac arrhythmias were detected in 57% (20/35) and 46% had ventricular tachycardia (16/35). Congenital pyloric stenosis was diagnosed in 39% (18/46), 9 had esophageal dysmotility and 19 had intestinal dysmotility. Four patients suffered from intestinal perforations. Seven patients died at mean age of 17 years (range: 2 months to 39 years). The cause of death in four patients was cardiac arrhythmia and sudden death, while others died of prematurity, gastrointestinal perforation, and infected foot ulcers leading to sepsis. Our study highlights high prevalence of myopathy, metabolic abnormalities, cardiac, and gastrointestinal problems in patients with CGL4. CGL4 patients are at high risk of early death mainly caused by cardiac arrhythmias.
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Affiliation(s)
- Gulcin Akinci
- Department of Pediatric Neurology, University of Health Sciences, Izmir Faculty of Medicine, Behcet Uz Children’s Hospital, Izmir, Turkey
| | | | - Nivedita Patni
- Division of Pediatric Endocrinology, Department of Pediatrics, UT Southwestern Medical Center, Dallas, TX, USA
| | - Nadia Alhashmi
- Clinical and Biochemical Genetics Department, Child Health Department, Royal Hospital, Muscat, Oman
| | | | - Flavia Prodam
- Division of Pediatrics, Department of Health Sciences, University of Piemonte Orientale, Novara, Italy
| | - Nancy Gagne
- Department of Pediatrics, Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Funmbi Babalola
- The Hospital for Sick Children, Department of Pediatrics, Toronto, ON, Canada
| | - Aisha Al Senani
- National Diabetes and Endocrine Center, Royal Hospital, Muscat, Oman
| | - Kavitha Muniraj
- Samatvam Diabetes Endocrinology and Medical Center, Bangalore, India
| | - Solaf M. Elsayed
- Medical Genetics Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Marianna Beghini
- Division of Endocrinology and Metabolism, Department of Internal Medicine III, Medical University of Vienna, Austria
| | | | | | - Madhumati S Vaishnav
- Samatvam Diabetes Endocrinology and Medical Center, Bangalore, India
- Indian Institute of Science, Center for Nano Science and Engineering, Bangalore, India
| | - Ender Can
- Division of Pediatric Neurology, Gaziantep Children’s Hospital, Gaziantep, Turkey
| | | | - Ekaterina Sorkina
- Endocrinology Research Centre, Moscow, Russia
- Clinical Research Facility, The Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Fatma Dursun
- Department of Pediatric Endocrinology, Umraniye Training and Research Hospital, Istanbul, Turkey
| | - Clemens Kamrath
- Centre of Child and Adolescent Medicine, Department of General Pediatrics and Neonatology, Justus-Liebig-University Giessen, Germany
| | - Umit Cavdar
- Division of Endocrinology, Katip Celebi University, Izmir, Turkey
| | - Partha P. Chakraborty
- Department of Endocrinology and Metabolism, Medical College Hospital, Kolkata, India
| | - Ozlem Akgun Dogan
- Department of Pediatric Genetics, Acibadem Mehmet Ali Aydınlar University, Istanbul, Turkey
| | | | | | - Nil Comunoglu
- Department of Pathology, Istanbul University Cerrahpasa Faculty of Medicine, Istanbul, Turkey
| | - Ahmed Hamed
- Child Health Department, Royal Hospital, Muscat, Oman
| | - Tea Huseinbegovic
- Division of Endocrinology, Department of Internal Medicine, Center for Human Nutrition, UT Southwestern Medical Center, Dallas, TX, USA
| | - Thomas Scherer
- Division of Endocrinology and Metabolism, Department of Internal Medicine III, Medical University of Vienna, Austria
| | - Jacqueline Curtis
- The Hospital for Sick Children, Department of Pediatrics, Toronto, ON, Canada
| | - Rebecca J. Brown
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Haluk Topaloglu
- Department of Pediatric Neurology, Yeditepe University, Istanbul, Turkey
| | - Vinaya Simha
- Division of Endocrinology, Mayo Clinic, Rochester, MN, USA
| | - Martin Wabitsch
- Division of Pediatric Endocrinology and Diabetes, Department of Pediatrics and Adolescent Medicine, University Center Ulm, Ulm, Germany
| | - Beyhan Tuysuz
- Department of Pediatric Genetics, Istanbul University, Cerrahpasa Faculty of Medicine, Istanbul, Turkey
| | - Elif A. Oral
- Division of Metabolism, Endocrinology and Diabetes (MEND), Department of Internal Medicine, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Baris Akinci
- DEPARK, Dokuz Eylul University, Izmir, Turkey
- Izmir Biomedicine and Genome Center, Izmir, Turkey
| | - Abhimanyu Garg
- Section of Nutrition and Metabolic Diseases, Division of Endocrinology, Department of Internal Medicine, Center for Human Nutrition, UT Southwestern Medical Center, Dallas, TX, USA
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Higuchi Y, Ogata T, Nakanishi N, Nishi M, Tsuji Y, Tomita S, Conway SJ, Matoba S. Cavin-2 promotes fibroblast-to-myofibroblast trans-differentiation and aggravates cardiac fibrosis. ESC Heart Fail 2024; 11:167-178. [PMID: 37872863 PMCID: PMC10804157 DOI: 10.1002/ehf2.14571] [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: 03/09/2023] [Revised: 09/22/2023] [Accepted: 10/08/2023] [Indexed: 10/25/2023] Open
Abstract
AIMS Transforming growth factor β (TGF-β) signalling is one of the critical pathways in fibroblast activation, and several drugs targeting the TGF-β/Smad signalling pathway in heart failure with cardiac fibrosis are being tested in clinical trials. Some caveolins and cavins, which are components of caveolae on the plasma membrane, are known for their association with the regulation of TGF-β signalling. Cavin-2 is particularly abundant in fibroblasts; however, the detailed association between Cavin-2 and cardiac fibrosis is still unclear. We tried to clarify the involvement and role of Cavin-2 in fibroblasts and cardiac fibrosis. METHODS AND RESULTS To clarify the role of Cavin-2 in cardiac fibrosis, we performed transverse aortic constriction (TAC) operations on four types of mice: wild-type (WT), Cavin-2 null (Cavin-2 KO), Cavin-2flox/flox , and activated fibroblast-specific Cavin-2 conditional knockout (Postn-Cre/Cavin-2flox/flox , Cavin-2 cKO) mice. We collected mouse embryonic fibroblasts (MEFs) from WT and Cavin-2 KO mice and investigated the effect of Cavin-2 in fibroblast trans-differentiation into myofibroblasts and associated TGF-β signalling. Four weeks after TAC, cardiac fibrotic areas in both the Cavin-2 KO and the Cavin-2 cKO mice were significantly decreased compared with each control group (WT 8.04 ± 1.58% vs. Cavin-2 KO 0.40 ± 0.03%, P < 0.01; Cavin-2flox/flox , 7.19 ± 0.50% vs. Cavin-2 cKO 0.88 ± 0.44%, P < 0.01). Fibrosis-associated mRNA expression (Col1a1, Ctgf, and Col3) was significantly attenuated in the Cavin-2 KO mice after TAC. α1 type I collagen deposition and non-vascular αSMA-positive cells (WT 43.5 ± 2.4% vs. Cavin-2 KO 25.4 ± 3.2%, P < 0.01) were reduced in the heart of the Cavin-2 cKO mice after TAC operation. The levels of αSMA protein (0.36-fold, P < 0.05) and fibrosis-associated mRNA expression (Col1a1, 0.69-fold, P < 0.01; Ctgf, 0.27-fold, P < 0.01; Col3, 0.60-fold, P < 0.01) were decreased in the Cavin-2 KO MEFs compared with the WT MEFs. On the other hand, αSMA protein levels were higher in the Cavin-2 overexpressed MEFs compared with the control MEFs (2.40-fold, P < 0.01). TGF-β1-induced Smad2 phosphorylation was attenuated in the Cavin-2 KO MEFs compared with WT MEFs (0.60-fold, P < 0.01). Heat shock protein 90 protein levels were significantly reduced in the Cavin-2 KO MEFs compared with the WT MEFs (0.69-fold, P < 0.01). CONCLUSIONS Cavin-2 loss suppressed fibroblast trans-differentiation into myofibroblasts through the TGF-β/Smad signalling. The loss of Cavin-2 in cardiac fibroblasts suppresses cardiac fibrosis and may maintain cardiac function.
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Affiliation(s)
- Yusuke Higuchi
- Department of Cardiovascular Medicine, Graduate School of Medical ScienceKyoto Prefectural University of MedicineKyotoJapan
| | - Takehiro Ogata
- Department of Cardiovascular Medicine, Graduate School of Medical ScienceKyoto Prefectural University of MedicineKyotoJapan
- Department of Pathology and Cell Regulation, Graduate School of Medical ScienceKyoto Prefectural University of MedicineKyotoJapan
| | - Naohiko Nakanishi
- Department of Cardiovascular Medicine, Graduate School of Medical ScienceKyoto Prefectural University of MedicineKyotoJapan
| | - Masahiro Nishi
- Department of Cardiovascular Medicine, Graduate School of Medical ScienceKyoto Prefectural University of MedicineKyotoJapan
| | - Yumika Tsuji
- Department of Cardiovascular Medicine, Graduate School of Medical ScienceKyoto Prefectural University of MedicineKyotoJapan
| | - Shinya Tomita
- Department of Cardiovascular Medicine, Graduate School of Medical ScienceKyoto Prefectural University of MedicineKyotoJapan
| | - Simon J. Conway
- Herman B. Wells Center for Pediatric Research, Department of PediatricsIndiana University School of MedicineIndianapolisINUSA
| | - Satoaki Matoba
- Department of Cardiovascular Medicine, Graduate School of Medical ScienceKyoto Prefectural University of MedicineKyotoJapan
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Yildirim Simsir I, Tuysuz B, Ozbek MN, Tanrikulu S, Celik Guler M, Karhan AN, Denkboy Ongen Y, Gunes N, Soyaltin UE, Altay C, Nur B, Ozalkak S, Akgun Dogan O, Dursun F, Pekkolay Z, Eren MA, Usta Y, Ozisik S, Ozgen Saydam B, Adiyaman SC, Unal MC, Gungor Semiz G, Turan I, Eren E, Kayserili H, Jeru I, Vigouroux C, Atik T, Onay H, Ozen S, Arioglu Oral E, Akinci B. Clinical features of generalized lipodystrophy in Turkey: A cohort analysis. Diabetes Obes Metab 2023; 25:1950-1963. [PMID: 36946378 DOI: 10.1111/dom.15061] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 03/09/2023] [Accepted: 03/19/2023] [Indexed: 03/23/2023]
Abstract
AIM To describe the Turkish generalized lipodystrophy (GL) cohort with the frequency of each complication and the death rate during the period of the follow-up. METHODS This study reports on 72 patients with GL (47 families) registered at different centres in Turkey that cover all regions of the country. The mean ± SD follow-up was 86 ± 78 months. RESULTS The Kaplan-Meier estimate of the median time to diagnosis of diabetes and/or prediabetes was 16 years. Hyperglycaemia was not controlled in 37 of 45 patients (82.2%) with diabetes. Hypertriglyceridaemia developed in 65 patients (90.3%). The Kaplan-Meier estimate of the median time to diagnosis of hypertriglyceridaemia was 14 years. Hypertriglyceridaemia was severe (≥ 500 mg/dl) in 38 patients (52.8%). Seven (9.7%) patients suffered from pancreatitis. The Kaplan-Meier estimate of the median time to diagnosis of hepatic steatosis was 15 years. Liver disease progressed to cirrhosis in nine patients (12.5%). Liver disease was more severe in congenital lipodystrophy type 2 (CGL2). Proteinuric chronic kidney disease (CKD) developed in 32 patients (44.4%) and cardiac disease in 23 patients (31.9%). Kaplan-Meier estimates of the median time to diagnosis of CKD and cardiac disease were 25 and 45 years, respectively. Females appeared to have a more severe metabolic disease, with an earlier onset of metabolic abnormalities. Ten patients died during the follow-up period. Causes of death were end-stage renal disease, sepsis (because of recurrent intestinal perforations, coronavirus disease, diabetic foot infection and following coronary artery bypass graft surgery), myocardial infarction, heart failure because of dilated cardiomyopathy, stroke, liver complications and angiosarcoma. CONCLUSIONS Standard treatment approaches have only a limited impact and do not prevent the development of severe metabolic abnormalities and early onset of organ complications in GL.
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Affiliation(s)
- Ilgin Yildirim Simsir
- Division of Endocrinology, Department of Internal Medicine, Ege University School of Medicine, Izmir, Turkey
| | - Beyhan Tuysuz
- Department of Genetics, Istanbul Cerrahpasa University, Istanbul, Turkey
| | - Mehmet Nuri Ozbek
- Division of Pediatric Endocrinology, Mardin Artuklu University, Mardin, Turkey
| | - Seher Tanrikulu
- Division of Endocrinology, Department of Internal Medicine, Acibadem Hospital, Istanbul, Turkey
| | - Merve Celik Guler
- Department of Internal Medicine, Dokuz Eylul University School of Medicine, Izmir, Turkey
| | - Asuman Nur Karhan
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Mersin University Faculty of Medicine, Mersin, Turkey
| | - Yasemin Denkboy Ongen
- Division of Pediatric Endocrinology, Uludag University, Faculty of Medicine, Bursa, Turkey
| | - Nilay Gunes
- Department of Genetics, Istanbul Cerrahpasa University, Istanbul, Turkey
| | - Utku Erdem Soyaltin
- Division of Endocrinology, Department of Internal Medicine, Ege University School of Medicine, Izmir, Turkey
| | - Canan Altay
- Department of Radiology, Dokuz Eylul University School of Medicine, Izmir, Turkey
| | - Banu Nur
- Division of Pediatric Genetics, Akdeniz University, Antalya, Turkey
| | - Servan Ozalkak
- Division of Pediatric Endocrinology, Diyarbakir Children's Hospital, Diyarbakir, Turkey
| | - Ozlem Akgun Dogan
- Department of Pediatric Genetics, Faculty of Medicine, Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey
| | - Fatma Dursun
- Department of Pediatric Endocrinology and Diabetes, Istanbul University of Health Science, Umraniye Training and Research Hospital, Istanbul, Turkey
| | - Zafer Pekkolay
- Division of Endocrinology and Metabolism, Dicle University Faculty of Medicine, Diyarbakir, Turkey
| | - Mehmet Ali Eren
- Department of Endocrinology and Metabolism, Harran University, Faculty of Medicine, Sanliurfa, Turkey
| | - Yusuf Usta
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Mersin University Faculty of Medicine, Mersin, Turkey
| | - Secil Ozisik
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Koc University School of Medicine, Istanbul, Turkey
| | - Basak Ozgen Saydam
- Division of Endocrinology and Metabolism, Yildirim Beyazit University, Yenimahalle Training Hospital, Ankara, Turkey
| | - Suleyman Cem Adiyaman
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Dokuz Eylul University School of Medicine, Izmir, Turkey
| | - Mehmet Cagri Unal
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Dokuz Eylul University School of Medicine, Izmir, Turkey
| | - Gokcen Gungor Semiz
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Dokuz Eylul University School of Medicine, Izmir, Turkey
| | - Ihsan Turan
- Division of Pediatric Endocrinology, Faculty of Medicine, Cukurova University, Adana, Turkey
| | - Erdal Eren
- Division of Pediatric Endocrinology, Uludag University, Faculty of Medicine, Bursa, Turkey
| | - Hulya Kayserili
- Department of Medical Genetics, Koc University School of Medicine, Istanbul, Turkey
| | - Isabelle Jeru
- Department of Medical Genetics, DMU BioGeM, Pitié-Salpêtrière Hospital, Assistance Publique-Hôpitaux de Paris, Sorbonne University, Paris, France
| | - Corinne Vigouroux
- Assistance Publique-Hôpitaux de Paris, Saint-Antoine University Hospital, National Reference Center for Rare Diseases of Insulin Secretion and Insulin Sensitivity (PRISIS), Department of Endocrinology, Diabetology and Reproductive Endocrinology and Department of Molecular Biology and Genetics, and Sorbonne University, Inserm U938, Saint-Antoine Research Centre, Institute of Cardiometabolism and Nutrition, Paris, France
| | - Tahir Atik
- Division of Pediatric Genetics, Ege University School of Medicine, Izmir, Turkey
| | - Huseyin Onay
- Department of Medical Genetics, Ege University, Izmir, Turkey
| | - Samim Ozen
- Division of Pediatric Endocrinology and Diabetes, Ege University School of Medicine, Izmir, Turkey
| | - Elif Arioglu Oral
- Division of Metabolism, Endocrinology and Diabetes, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
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Enyong EN, Gurley JM, De Ieso ML, Stamer WD, Elliott MH. Caveolar and non-Caveolar Caveolin-1 in ocular homeostasis and disease. Prog Retin Eye Res 2022; 91:101094. [PMID: 35729002 PMCID: PMC9669151 DOI: 10.1016/j.preteyeres.2022.101094] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 06/03/2022] [Accepted: 06/10/2022] [Indexed: 11/17/2022]
Abstract
Caveolae, specialized plasma membrane invaginations present in most cell types, play important roles in multiple cellular processes including cell signaling, lipid uptake and metabolism, endocytosis and mechanotransduction. They are found in almost all cell types but most abundant in endothelial cells, adipocytes and fibroblasts. Caveolin-1 (Cav1), the signature structural protein of caveolae was the first protein associated with caveolae, and in association with Cavin1/PTRF is required for caveolae formation. Genetic ablation of either Cav1 or Cavin1/PTRF downregulates expression of the other resulting in loss of caveolae. Studies using Cav1-deficient mouse models have implicated caveolae with human diseases such as cardiomyopathies, lipodystrophies, diabetes and muscular dystrophies. While caveolins and caveolae are extensively studied in extra-ocular settings, their contributions to ocular function and disease pathogenesis are just beginning to be appreciated. Several putative caveolin/caveolae functions are relevant to the eye and Cav1 is highly expressed in retinal vascular and choroidal endothelium, Müller glia, the retinal pigment epithelium (RPE), and the Schlemm's canal endothelium and trabecular meshwork cells. Variants at the CAV1/2 gene locus are associated with risk of primary open angle glaucoma and the high risk HTRA1 variant for age-related macular degeneration is thought to exert its effect through regulation of Cav1 expression. Caveolins also play important roles in modulating retinal neuroinflammation and blood retinal barrier permeability. In this article, we describe the current state of caveolin/caveolae research in the context of ocular function and pathophysiology. Finally, we discuss new evidence showing that retinal Cav1 exists and functions outside caveolae.
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Affiliation(s)
- Eric N Enyong
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA; Department of Ophthalmology, Dean A. McGee Eye Institute, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Jami M Gurley
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA; Department of Ophthalmology, Dean A. McGee Eye Institute, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Michael L De Ieso
- Department of Ophthalmology, Duke Eye Center, Duke University, Durham, NC, USA
| | - W Daniel Stamer
- Department of Ophthalmology, Duke Eye Center, Duke University, Durham, NC, USA
| | - Michael H Elliott
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA; Department of Ophthalmology, Dean A. McGee Eye Institute, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.
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Popov LD. Deciphering the relationship between caveolae-mediated intracellular transport and signalling events. Cell Signal 2022; 97:110399. [PMID: 35820545 DOI: 10.1016/j.cellsig.2022.110399] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 07/02/2022] [Accepted: 07/05/2022] [Indexed: 11/30/2022]
Abstract
The caveolae-mediated transport across polarized epithelial cell barriers has been largely deciphered in the last decades and is considered the second essential intracellular transfer mechanism, after the clathrin-dependent endocytosis. The basic cell biology knowledge was supplemented recently, with the molecular mechanisms beyond caveolae generation implying the key contribution of the lipid-binding proteins (the structural protein Caveolin and the adapter protein Cavin), along with the bulb coat stabilizing molecules PACSIN-2 and Eps15 homology domain protein-2. The current attention is focused also on caveolae architecture (such as the bulb coat, the neck, the membrane funnel inside the bulb, and the associated receptors), and their specific tasks during the intracellular transport of various cargoes. Here, we resume the present understanding of the assembly, detachment, and internalization of caveolae from the plasma membrane lipid raft domains, and give an updated view on transcytosis and endocytosis, the two itineraries of cargoes transport via caveolae. The review adds novel data on the signalling molecules regulating caveolae intracellular routes and on the transport dysregulation in diseases. The therapeutic possibilities offered by exploitation of Caveolin-1 expression and caveolae trafficking, and the urgent issues to be uncovered conclude the review.
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Affiliation(s)
- Lucia-Doina Popov
- Institute of Cellular Biology and Pathology "Nicolae Simionescu" of the Romanian Academy, 8, B.P. Hasdeu Street, 050568 Bucharest, Romania.
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Evaluation of the dystrophin carboxy-terminal domain for micro-dystrophin gene therapy in cardiac and skeletal muscles in the DMD mdx rat model. Gene Ther 2022; 29:520-535. [PMID: 35105949 DOI: 10.1038/s41434-022-00317-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 12/09/2021] [Accepted: 01/13/2022] [Indexed: 01/02/2023]
Abstract
Duchenne muscular dystrophy (DMD) is a muscle wasting disorder caused by mutations in the gene encoding dystrophin. Gene therapy using micro-dystrophin (MD) transgenes and recombinant adeno-associated virus (rAAV) vectors hold great promise. To overcome the limited packaging capacity of rAAV vectors, most MD do not include dystrophin carboxy-terminal (CT) domain. Yet, the CT domain is known to recruit α1- and β1-syntrophins and α-dystrobrevin, a part of the dystrophin-associated protein complex (DAPC), which is a signaling and structural mediator of muscle cells. In this study, we explored the impact of inclusion of the dystrophin CT domain on ΔR4-23/ΔCT MD (MD1), in DMDmdx rats, which allows for relevant evaluations at muscular and cardiac levels. We showed by LC-MS/MS that MD1 expression is sufficient to restore the interactions at a physiological level of most DAPC partners in skeletal and cardiac muscles, and that inclusion of the CT domain increases the recruitment of some DAPC partners at supra-physiological levels. In parallel, we demonstrated that inclusion of the CT domain does not improve MD1 therapeutic efficacy on DMD muscle and cardiac pathologies. Our work highlights new evidences of the therapeutic potential of MD1 and strengthens the relevance of this candidate for gene therapy of DMD.
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7
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Patni N, Hegele RA, Garg A. Caveolar dysfunction and lipodystrophies. Eur J Endocrinol 2022; 186:C1-C4. [PMID: 34935636 PMCID: PMC9285858 DOI: 10.1530/eje-21-1243] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 12/21/2021] [Indexed: 01/30/2023]
Affiliation(s)
- Nivedita Patni
- Division of Pediatric Endocrinology, Department of Pediatrics, UT Southwestern Medical Center, Dallas, Texas, USA
| | - Robert A Hegele
- Department of Medicine and Robarts Research Institute, Western University, London, Ontario, Canada
| | - Abhimanyu Garg
- Division of Nutrition and Metabolic Diseases, Department of Internal Medicine and the Center for Human Nutrition, UT Southwestern Medical Center, Dallas, Texas, USA
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8
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Wang H, Marrosu E, Brayson D, Wasala NB, Johnson EK, Scott CS, Yue Y, Hau KL, Trask AJ, Froehner SC, Adams ME, Zhang L, Duan D, Montanaro F. Proteomic analysis identifies key differences in the cardiac interactomes of dystrophin and micro-dystrophin. Hum Mol Genet 2021; 30:1321-1336. [PMID: 33949649 PMCID: PMC8255133 DOI: 10.1093/hmg/ddab133] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/26/2021] [Accepted: 04/29/2021] [Indexed: 01/16/2023] Open
Abstract
ΔR4-R23/ΔCT micro-dystrophin (μDys) is a miniaturized version of dystrophin currently evaluated in a Duchenne muscular dystrophy (DMD) gene therapy trial to treat skeletal and cardiac muscle disease. In pre-clinical studies, μDys efficiently rescues cardiac histopathology, but only partially normalizes cardiac function. To gain insights into factors that may impact the cardiac therapeutic efficacy of μDys, we compared by mass spectrometry the composition of purified dystrophin and μDys protein complexes in the mouse heart. We report that compared to dystrophin, μDys has altered associations with α1- and β2-syntrophins, as well as cavins, a group of caveolae-associated signaling proteins. In particular, we found that membrane localization of cavin-1 and cavin-4 in cardiomyocytes requires dystrophin and is profoundly disrupted in the heart of mdx5cv mice, a model of DMD. Following cardiac stress/damage, membrane-associated cavin-4 recruits the signaling molecule ERK to caveolae, which activates key cardio-protective responses. Evaluation of ERK signaling revealed a profound inhibition, below physiological baseline, in the mdx5cv mouse heart. Expression of μDys in mdx5cv mice prevented the development of cardiac histopathology but did not rescue membrane localization of cavins nor did it normalize ERK signaling. Our study provides the first comparative analysis of purified protein complexes assembled in vivo by full-length dystrophin and a therapeutic micro-dystrophin construct. This has revealed disruptions in cavins and ERK signaling that may contribute to DMD cardiomyopathy. This new knowledge is important for ongoing efforts to prevent and treat heart disease in DMD patients.
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Affiliation(s)
- Hong Wang
- Center for Gene Therapy, The Research Institute at Nationwide Children's Hospital, Columbus OH 43205, USA.,Department of Pediatric Cardiology, China Medical University, Liaoning 110004, China
| | - Elena Marrosu
- Developmental Neuroscience Research and Teaching Department, Dubowitz Neuromuscular Centre, Molecular Neurosciences Section, UCL Great Ormond Street Institute of Child Health, London WC1N 1EH, UK.,NIHR Great Ormond Street Hospital Biomedical Research Centre, London WC1N 1EH, UK
| | - Daniel Brayson
- Developmental Neuroscience Research and Teaching Department, Dubowitz Neuromuscular Centre, Molecular Neurosciences Section, UCL Great Ormond Street Institute of Child Health, London WC1N 1EH, UK.,NIHR Great Ormond Street Hospital Biomedical Research Centre, London WC1N 1EH, UK
| | - Nalinda B Wasala
- Department of Molecular Microbiology and Immunology, School of Medicine, University of Missouri, Columbia, MO 65211, USA
| | - Eric K Johnson
- Center for Gene Therapy, The Research Institute at Nationwide Children's Hospital, Columbus OH 43205, USA
| | - Charlotte S Scott
- Developmental Neuroscience Research and Teaching Department, Dubowitz Neuromuscular Centre, Molecular Neurosciences Section, UCL Great Ormond Street Institute of Child Health, London WC1N 1EH, UK.,NIHR Great Ormond Street Hospital Biomedical Research Centre, London WC1N 1EH, UK
| | - Yongping Yue
- Department of Molecular Microbiology and Immunology, School of Medicine, University of Missouri, Columbia, MO 65211, USA
| | - Kwan-Leong Hau
- Developmental Neuroscience Research and Teaching Department, Dubowitz Neuromuscular Centre, Molecular Neurosciences Section, UCL Great Ormond Street Institute of Child Health, London WC1N 1EH, UK.,NIHR Great Ormond Street Hospital Biomedical Research Centre, London WC1N 1EH, UK
| | - Aaron J Trask
- Center for Cardiovascular Research, The Research Institute at Nationwide Children's Hospital, Columbus, OH 43205, USA.,Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH 43205, USA
| | - Stan C Froehner
- Department of Physiology and Biophysics, University of Washington, Seattle, WA 98195, USA
| | - Marvin E Adams
- Department of Physiology and Biophysics, University of Washington, Seattle, WA 98195, USA
| | - Liwen Zhang
- Mass Spectrometry and Proteomics Facility, Campus Chemical Instrument Center, The Ohio State University, Columbus, OH 43210, USA
| | - Dongsheng Duan
- Department of Molecular Microbiology and Immunology, School of Medicine, University of Missouri, Columbia, MO 65211, USA.,Department of Neurology, School of Medicine, College of Veterinary Medicine, University of Missouri, Columbia, MO 65211, USA.,Department of Bioengineering, College of Veterinary Medicine, University of Missouri, Columbia, MO 65211, USA.,Department of Biomedical Sciences, College of Veterinary Medicine, University of Missouri, Columbia, MO 65211, USA.,Department of Biomedical, Biological and Chemical Engineering, College of Engineering, University of Missouri, Columbia, MO 65211, USA
| | - Federica Montanaro
- Center for Gene Therapy, The Research Institute at Nationwide Children's Hospital, Columbus OH 43205, USA.,Developmental Neuroscience Research and Teaching Department, Dubowitz Neuromuscular Centre, Molecular Neurosciences Section, UCL Great Ormond Street Institute of Child Health, London WC1N 1EH, UK.,NIHR Great Ormond Street Hospital Biomedical Research Centre, London WC1N 1EH, UK
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9
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Hotz PW, Wiesnet M, Tascher G, Braun T, Müller S, Mendler L. Profiling the Murine SUMO Proteome in Response to Cardiac Ischemia and Reperfusion Injury. Molecules 2020; 25:E5571. [PMID: 33260959 PMCID: PMC7731038 DOI: 10.3390/molecules25235571] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 11/20/2020] [Accepted: 11/24/2020] [Indexed: 01/31/2023] Open
Abstract
SUMOylation is a reversible posttranslational modification pathway catalyzing the conjugation of small ubiquitin-related modifier (SUMO) proteins to lysine residues of distinct target proteins. SUMOylation modifies a wide variety of cellular regulators thereby affecting a multitude of key processes in a highly dynamic manner. The SUMOylation pathway displays a hallmark in cellular stress-adaption, such as heat or redox stress. It has been proposed that enhanced cellular SUMOylation protects the brain during ischemia, however, little is known about the specific regulation of the SUMO system and the potential target proteins during cardiac ischemia and reperfusion injury (I/R). By applying left anterior descending (LAD) coronary artery ligation and reperfusion in mice, we detect dynamic changes in the overall cellular SUMOylation pattern correlating with decreased SUMO deconjugase activity during I/R injury. Further, unbiased system-wide quantitative SUMO-proteomics identified a sub-group of SUMO targets exhibiting significant alterations in response to cardiac I/R. Notably, transcription factors that control hypoxia- and angiogenesis-related gene expression programs, exhibit altered SUMOylation during ischemic stress adaptation. Moreover, several components of the ubiquitin proteasome system undergo dynamic changes in SUMO conjugation during cardiac I/R suggesting an involvement of SUMO signaling in protein quality control and proteostasis in the ischemic heart. Altogether, our study reveals regulated candidate SUMO target proteins in the mouse heart, which might be important in coping with hypoxic/proteotoxic stress during cardiac I/R injury.
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Affiliation(s)
- Paul W. Hotz
- Institute of Biochemistry II, Goethe University Medical School, University Hospital Building 75, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Germany; (P.W.H.); (G.T.)
| | - Marion Wiesnet
- Department of Cardiac Development and Remodeling, Max Planck Institute for Heart and Lung Research, Ludwigstrasse 43, 61231 Bad Nauheim, Germany; (M.W.); (T.B.)
| | - Georg Tascher
- Institute of Biochemistry II, Goethe University Medical School, University Hospital Building 75, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Germany; (P.W.H.); (G.T.)
| | - Thomas Braun
- Department of Cardiac Development and Remodeling, Max Planck Institute for Heart and Lung Research, Ludwigstrasse 43, 61231 Bad Nauheim, Germany; (M.W.); (T.B.)
| | - Stefan Müller
- Institute of Biochemistry II, Goethe University Medical School, University Hospital Building 75, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Germany; (P.W.H.); (G.T.)
| | - Luca Mendler
- Institute of Biochemistry II, Goethe University Medical School, University Hospital Building 75, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Germany; (P.W.H.); (G.T.)
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10
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Buwa N, Mazumdar D, Balasubramanian N. Caveolin1 Tyrosine-14 Phosphorylation: Role in Cellular Responsiveness to Mechanical Cues. J Membr Biol 2020; 253:509-534. [PMID: 33089394 DOI: 10.1007/s00232-020-00143-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 10/05/2020] [Indexed: 02/07/2023]
Abstract
The plasma membrane is a dynamic lipid bilayer that engages with the extracellular microenvironment and intracellular cytoskeleton. Caveolae are distinct plasma membrane invaginations lined by integral membrane proteins Caveolin1, 2, and 3. Caveolae formation and stability is further supported by additional proteins including Cavin1, EHD2, Pacsin2 and ROR1. The lipid composition of caveolar membranes, rich in cholesterol and phosphatidylserine, actively contributes to caveolae formation and function. Post-translational modifications of Cav1, including its phosphorylation of the tyrosine-14 residue (pY14Cav1) are vital to its function in and out of caveolae. Cells that experience significant mechanical stress are seen to have abundant caveolae. They play a vital role in regulating cellular signaling and endocytosis, which could further affect the abundance and distribution of caveolae at the PM, contributing to sensing and/or buffering mechanical stress. Changes in membrane tension in cells responding to multiple mechanical stimuli affects the organization and function of caveolae. These mechanical cues regulate pY14Cav1 levels and function in caveolae and focal adhesions. This review, along with looking at the mechanosensitive nature of caveolae, focuses on the role of pY14Cav1 in regulating cellular mechanotransduction.
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Affiliation(s)
- Natasha Buwa
- Indian Institute of Science Education and Research, Pune, Dr. Homi Bhabha Road, Pashan, Pune, 411008, India
| | - Debasmita Mazumdar
- Indian Institute of Science Education and Research, Pune, Dr. Homi Bhabha Road, Pashan, Pune, 411008, India
| | - Nagaraj Balasubramanian
- Indian Institute of Science Education and Research, Pune, Dr. Homi Bhabha Road, Pashan, Pune, 411008, India.
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11
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Wei Z, Lei J, Shen F, Dai Y, Sun Y, Liu Y, Dai Y, Jian Z, Wang S, Chen Z, Liao K, Hong S. Cavin1 Deficiency Causes Disorder of Hepatic Glycogen Metabolism and Neonatal Death by Impacting Fenestrations in Liver Sinusoidal Endothelial Cells. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:2000963. [PMID: 33042738 PMCID: PMC7539207 DOI: 10.1002/advs.202000963] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 07/10/2020] [Indexed: 05/05/2023]
Abstract
It has been reported that Cavin1 deficiency causes lipodystrophy in both humans and mice by affecting lipid metabolism. The ablation of Cavin1 in rodents also causes a significant deviation from Mendelian ratio at weaning in a background-dependent manner, suggesting the presence of undiscovered functions of Cavin1. In the current study, the results show that Cavin1 deficiency causes neonatal death in C57BL/6J mice by dampening the storage and mobilization of glycogen in the liver, which leads to lethal neonatal hypoglycemia. Further investigation by electron microscopy reveals that Cavin1 deficiency impairs the fenestration in liver sinusoidal endothelial cells (LSECs) and impacts the permeability of endothelial barrier in the liver. Mechanistically, Cavin1 deficiency inhibits the RhoA-Rho-associated protein kinase 2-LIM domain kinase-Cofilin signaling pathway and suppresses the dynamics of the cytoskeleton, and eventually causes the reduction of fenestrae in LSECs. In addition, the defect of fenestration in LSECs caused by Cavin1 deficiency can be rescued by treatment with the F-actin depolymerization reagent latrunculin A. In summary, the current study reveals a novel function of Cavin1 on fenestrae formation in LSECs and liver glycogen metabolism, which provide an explanation for the neonatal death of Cavin1 null mice and a potential mechanism for metabolic disorders in patients with Cavin1 mutation.
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Affiliation(s)
- Zhuang Wei
- State Key Laboratory of Genetic Engineering and School of Life SciencesHuman Phenome InstituteFudan UniversityShanghai200433China
- Key Laboratory of Systems BiologyInnovation Center for Cell Signaling NetworkCAS Center for Excellence in Molecular Cell ScienceInstitute of Biochemistry and Cell BiologyShanghai Institutes for Biological SciencesCAS320 Yueyang RoadShanghai200031China
| | - Jigang Lei
- Key Laboratory of Systems BiologyInnovation Center for Cell Signaling NetworkCAS Center for Excellence in Molecular Cell ScienceInstitute of Biochemistry and Cell BiologyShanghai Institutes for Biological SciencesCAS320 Yueyang RoadShanghai200031China
- The Department of BiologyTongji UniversityShanghai200092China
| | - Feng Shen
- Department of Hepatobiliary SurgeryDongfeng HospitalHubei University of MedicineShiyanHubei442001China
| | - Yuxiang Dai
- Department of CardiologyZhongshan HospitalFudan UniversityShanghai Institute of Cardiovascular DiseaseShanghai200031P. R. China
| | - Yan Sun
- Masonic Medical Research Institute2150 Bleecker StUticaNY13501USA
| | - Yilian Liu
- State Key Laboratory of Genetic Engineering and School of Life SciencesHuman Phenome InstituteFudan UniversityShanghai200433China
| | - Yan Dai
- Key Laboratory of Systems BiologyInnovation Center for Cell Signaling NetworkCAS Center for Excellence in Molecular Cell ScienceInstitute of Biochemistry and Cell BiologyShanghai Institutes for Biological SciencesCAS320 Yueyang RoadShanghai200031China
- State Key Laboratory of Cell BiologyKey Laboratory of Systems BiologyInnovation Center for Cell Signaling NetworkCAS Center for Excellence in Molecular Cell ScienceInstitute of Biochemistry and Cell BiologyShanghai Institutes for Biological SciencesCAS320 Yueyang RoadShanghai200031China
| | - Zhijie Jian
- Department of Radiologythe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an710049China
| | - Shilong Wang
- The Department of BiologyTongji UniversityShanghai200092China
| | - Zhengjun Chen
- Key Laboratory of Systems BiologyInnovation Center for Cell Signaling NetworkCAS Center for Excellence in Molecular Cell ScienceInstitute of Biochemistry and Cell BiologyShanghai Institutes for Biological SciencesCAS320 Yueyang RoadShanghai200031China
- State Key Laboratory of Cell BiologyKey Laboratory of Systems BiologyInnovation Center for Cell Signaling NetworkCAS Center for Excellence in Molecular Cell ScienceInstitute of Biochemistry and Cell BiologyShanghai Institutes for Biological SciencesCAS320 Yueyang RoadShanghai200031China
| | - Kan Liao
- Key Laboratory of Systems BiologyInnovation Center for Cell Signaling NetworkCAS Center for Excellence in Molecular Cell ScienceInstitute of Biochemistry and Cell BiologyShanghai Institutes for Biological SciencesCAS320 Yueyang RoadShanghai200031China
| | - Shangyu Hong
- State Key Laboratory of Genetic Engineering and School of Life SciencesHuman Phenome InstituteFudan UniversityShanghai200433China
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12
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Mathiesen SB, Lunde M, Stensland M, Martinsen M, Nyman TA, Christensen G, Carlson CR. The Cardiac Syndecan-2 Interactome. Front Cell Dev Biol 2020; 8:792. [PMID: 32984315 PMCID: PMC7483480 DOI: 10.3389/fcell.2020.00792] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 07/28/2020] [Indexed: 12/31/2022] Open
Abstract
The extracellular matrix (ECM) is important in cardiac remodeling and syndecans have gained increased interest in this process due to their ability to convert changes in the ECM to cell signaling. In particular, syndecan-4 has been shown to be important for cardiac remodeling, whereas the role of its close relative syndecan-2 is largely unknown in the heart. To get more insight into the role of syndecan-2, we here sought to identify interaction partners of syndecan-2 in rat left ventricle. By using three different affinity purification methods combined with mass spectrometry (MS) analysis, we identified 30 novel partners and 9 partners previously described in the literature, which together make up the first cardiac syndecan-2 interactome. Eleven of the novel partners were also verified in HEK293 cells (i.e., AP2A2, CAVIN2, DDX19A, EIF4E, JPH2, MYL12A, NSF, PFDN2, PSMC5, PSMD11, and RRAD). The cardiac syndecan-2 interactome partners formed connections to each other and grouped into clusters mainly involved in cytoskeletal remodeling and protein metabolism, but also into a cluster consisting of a family of novel syndecan-2 interaction partners, the CAVINs. MS analyses revealed that although syndecan-2 was significantly enriched in fibroblast fractions, most of its partners were present in both cardiomyocytes and fibroblasts. Finally, a comparison of the cardiac syndecan-2 and -4 interactomes revealed surprisingly few protein partners in common.
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Affiliation(s)
- Sabrina Bech Mathiesen
- Institute for Experimental Medical Research and Oslo University Hospital, University of Oslo, Oslo, Norway
| | - Marianne Lunde
- Institute for Experimental Medical Research and Oslo University Hospital, University of Oslo, Oslo, Norway
| | - Maria Stensland
- Department of Immunology, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Marita Martinsen
- Institute for Experimental Medical Research and Oslo University Hospital, University of Oslo, Oslo, Norway
| | - Tuula A Nyman
- Department of Immunology, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Geir Christensen
- Institute for Experimental Medical Research and Oslo University Hospital, University of Oslo, Oslo, Norway.,K.G. Jebsen Center for Cardiac Research, University of Oslo, Oslo, Norway
| | - Cathrine Rein Carlson
- Institute for Experimental Medical Research and Oslo University Hospital, University of Oslo, Oslo, Norway
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13
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Lessons from cavin-1 deficiency. Biochem Soc Trans 2020; 48:147-154. [PMID: 31922193 DOI: 10.1042/bst20190380] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 12/12/2019] [Accepted: 12/18/2019] [Indexed: 01/19/2023]
Abstract
Caveolae have been implicated in a wide range of critical physiological functions. In the past decade, the dominant role of cavin-1 in caveolae formation has been established, and it has been recognized as another master regulator for caveolae biology. Human patients with cavin-1 mutations develop lipodystrophy and muscular dystrophy and have some major pathological dysfunctions in fat tissue, skeleton muscle, heart, lung and other organs. Cavin-1 deficiency animal models consistently show similar phenotypes. However, the underlying molecular mechanisms remain to be elucidated. Recent studies have suggested many possible pathways, including mechanosensing, stress response, signal transduction, exosome secretion, and potential functions in the nucleus. Many excellent and comprehensive review articles already exist on the topics of caveolae structure formation, caveolins, and their pathophysiological functions. We will focus on recent studies using cavin-1 deficiency models, to summarize the pathophysiological changes in adipose, muscle, and other organs, followed by a summary of mechanistic studies about the roles of cavin-1, which includes caveolae formation, ribosomal RNA transcription, mechanical sensing, stress response, and exosome secretion. Further studies may help to elucidate the exact underlying molecular mechanism to explain the pathological changes observed in cavin-1 deficient human patients and animal models, so potential new therapeutic strategies can be developed.
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14
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Abstract
Transcytosis of macromolecules through lung endothelial cells is the primary route of transport from the vascular compartment into the interstitial space. Endothelial transcytosis is mostly a caveolae-dependent process that combines receptor-mediated endocytosis, vesicle trafficking via actin-cytoskeletal remodeling, and SNARE protein directed vesicle fusion and exocytosis. Herein, we review the current literature on caveolae-mediated endocytosis, the role of actin cytoskeleton in caveolae stabilization at the plasma membrane, actin remodeling during vesicle trafficking, and exocytosis of caveolar vesicles. Next, we provide a concise summary of experimental methods employed to assess transcytosis. Finally, we review evidence that transcytosis contributes to the pathogenesis of acute lung injury. © 2020 American Physiological Society. Compr Physiol 10:491-508, 2020.
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Affiliation(s)
- Joshua H. Jones
- Department of Pharmacology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Richard D. Minshall
- Department of Pharmacology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA,Department of Anesthesiology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA,Correspondence to
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15
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Tian J, Popal MS, Huang R, Zhang M, Zhao X, Zhang M, Song X. Caveolin as a Novel Potential Therapeutic Target in Cardiac and Vascular Diseases: A Mini Review. Aging Dis 2020; 11:378-389. [PMID: 32257548 PMCID: PMC7069461 DOI: 10.14336/ad.2019.09603] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 06/03/2019] [Indexed: 12/27/2022] Open
Abstract
Caveolin, a structural protein of caveolae, play roles in the regulation of endothelial function, cellular lipid homeostasis, and cardiac function by affecting the activity and biogenesis of nitric oxide, and by modulating signal transduction pathways that mediate inflammatory responses and oxidative stress. In this review, we present the role of caveolin in cardiac and vascular diseases and the relevant signaling pathways involved. Furthermore, we discuss a novel therapeutic perspective comprising crosstalk between caveolin and autophagy.
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Affiliation(s)
- Jinfan Tian
- 1 Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - Mohammad Sharif Popal
- 2 Department of Cardiac Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - RongChong Huang
- 3 Department of Cardiology, Beijing Friendship Hospital, Capital Medical University, Beijing 100010, China
| | - Min Zhang
- 1 Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - Xin Zhao
- 1 Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - Mingduo Zhang
- 1 Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - Xiantao Song
- 1 Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
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16
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Foss-Freitas MC, Akinci B, Luo Y, Stratton A, Oral EA. Diagnostic strategies and clinical management of lipodystrophy. Expert Rev Endocrinol Metab 2020; 15:95-114. [PMID: 32368944 DOI: 10.1080/17446651.2020.1735360] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 02/24/2020] [Indexed: 12/16/2022]
Abstract
Introduction: Lipodystrophy is a heterogeneous group of rare diseases characterized by various degrees of fat loss which leads to serious morbidity due to metabolic abnormalities associated with insulin resistance and subtype-specific clinical features associated with underlying molecular etiology.Areas covered: This article aims to help physicians address challenges in diagnosing and managing lipodystrophy. We systematically reviewed the literature on PubMed and Google Scholar databases to summarize the current knowledge in lipodystrophy management.Expert opinion: Adipose tissue is a highly active endocrine organ that regulates metabolic homeostasis in the human body through a comprehensive communication network with other organ systems such as the central nervous system, liver, digestive system, and the immune system. The adipose tissue is capable of producing and secreting numerous factors with important endocrine functions such as leptin that regulates energy homeostasis. Recent developments in the field have helped to solve some of the mysteries behind lipodystrophy that allowed us to get a better understanding of adipocyte function and differentiation. From a clinical standpoint, physicians who suspect lipodystrophy should distinguish the disease from several others that may present with similar clinical features. It is also important for physicians to carefully interpret clinical features, laboratory, and imaging results before moving to more sophisticated tests and making decisions about therapy.
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Affiliation(s)
- Maria C Foss-Freitas
- Division of Metabolism, Endocrinology and Diabetes (MEND), Department of Internal Medicine, Michigan Medicine, University of Michigan, Ann Arbor, MI, USA
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Ribeirao Preto Medical School, Sao Paulo University, Ribeirao Preto, Brazil
| | - Baris Akinci
- Division of Metabolism, Endocrinology and Diabetes (MEND), Department of Internal Medicine, Michigan Medicine, University of Michigan, Ann Arbor, MI, USA
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Dokuz Eylul University, Izmir, Turkey
| | - Yingying Luo
- Division of Metabolism, Endocrinology and Diabetes (MEND), Department of Internal Medicine, Michigan Medicine, University of Michigan, Ann Arbor, MI, USA
- Department of Endocrinology and Metabolism, Peking University People's Hospital, Beijing, China
| | | | - Elif A Oral
- Division of Metabolism, Endocrinology and Diabetes (MEND), Department of Internal Medicine, Michigan Medicine, University of Michigan, Ann Arbor, MI, USA
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17
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Mohapatra A, Lokappa SB, Chaudhary N. Interaction of cavin-1/PTRF leucine zipper domain 2 and its congenital generalized lipodystrophy mutant with model membranes. Biochem Biophys Res Commun 2020; 521:732-738. [PMID: 31706570 DOI: 10.1016/j.bbrc.2019.10.167] [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: 10/02/2019] [Accepted: 10/24/2019] [Indexed: 10/25/2022]
Abstract
The organization of caveolae ultrastructures in the plasma membrane and the functions they dictate are mediated by membrane-embedded caveolins (caveolin-1, 2, 3) and peripherally attached cavins (cavin-1, 2, 3, 4). Mutations in caveolin and cavin genes are associated with a variety of human diseases. Cavin-1/PTRF mutations are known to contribute to several human pathologies, including muscular dystrophy and congenital generalized lipodystrophy (CGL). In the present study, we investigated the membrane interaction of the second leucine zipper domain (LZD2) of cavin-1 and the analogous peptide stretch in its CGL frameshift mutant (p.Glu176Argfs). The fluorescence data from the Trp-tagged peptides suggest binding of both wild-type and mutant peptide with negatively-charged membranes. The mutant peptide displayed a rather enhanced interaction compared to the wild-type peptide. In addition, the mutant peptide displayed appreciable binding to the lipid raft-mimicking cholesterol/sphingomyelin-rich vesicles as well. The alteration in the dynamics of peptide-lipid interaction is attributed to increased charge and hydrophilicity of the mutant peptides. Overall, these results suggest that the frameshift mutation in cavin-1/PTRF (p.Glu176Argfs) imparts high membrane-binding propensity to the region corresponding to LZD2, which is hitherto unknown to interact with membranes. Such interaction in the disease condition, in turn, could either alter the native membrane interaction dynamics of cavin-1/PTRF or possibly result in interaction with non-target membranes.
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Affiliation(s)
- Anshuman Mohapatra
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781 039, India
| | - Sowmya Bekshe Lokappa
- Zilkha Neurogenetic Institute, University of Southern California, Los Angeles, 90033, USA; Department of Bioinformatics, Karunya University, Coimbatore, 641 114, India.
| | - Nitin Chaudhary
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781 039, India.
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18
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Liu Y, Lu P, Wang Y, Morrow BE, Zhou B, Zheng D. Spatiotemporal Gene Coexpression and Regulation in Mouse Cardiomyocytes of Early Cardiac Morphogenesis. J Am Heart Assoc 2019; 8:e012941. [PMID: 31322043 PMCID: PMC6761639 DOI: 10.1161/jaha.119.012941] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 06/06/2019] [Indexed: 12/18/2022]
Abstract
Background Heart tube looping to form a 4-chambered heart is a critical stage of embryonic heart development, but the gene drivers and their regulatory targets have not been extensively characterized at the cell-type level. Methods and Results To study the interaction of signaling pathways, transcription factors (TFs), and genetic networks in the process, we constructed gene co-expression networks and identified gene modules highly activated in individual cardiomyocytes at multiple anatomical regions and developmental stages using previously published single-cell RNA-seq data. Function analyses of the modules uncovered major pathways important for spatiotemporal cardiomyocyte differentiation. Interestingly, about half of the pathways were highly active in cardiomyocytes at the outflow tract (OFT) and atrioventricular canal, including well-known pathways for cardiac development and many newly identified ones. We predicted that these OFT-atrioventricular canal pathways were regulated by a large number of TFs actively expressed at the OFT-atrioventricular canal cardiomyocytes, with the prediction supported by motif enrichment analysis, including 10 TFs that have not been previously associated with cardiac development (eg, Etv5, Rbpms, and Baz2b). Furthermore, we found that TF targets in the OFT-atrioventricular canal modules were most significantly enriched with genes associated with mouse heart developmental abnormalities and human congenital heart defects, in comparison with TF targets in other modules, consistent with the critical developmental roles of OFT. Conclusions By analyzing gene co-expression at single cardiomyocytes, our systematic study has uncovered many known and additional new important TFs and their regulated molecular signaling pathways that are spatiotemporally active during heart looping.
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Affiliation(s)
- Yang Liu
- Department of GeneticsAlbert Einstein College of MedicineBronxNY
| | - Pengfei Lu
- Department of GeneticsAlbert Einstein College of MedicineBronxNY
| | - Yidong Wang
- Department of GeneticsAlbert Einstein College of MedicineBronxNY
| | - Bernice E. Morrow
- Department of GeneticsAlbert Einstein College of MedicineBronxNY
- Department of Ob/Gyn and PediatricsAlbert Einstein College of MedicineBronxNY
| | - Bin Zhou
- Department of GeneticsAlbert Einstein College of MedicineBronxNY
- Department of Ob/Gyn and PediatricsAlbert Einstein College of MedicineBronxNY
- Department of MedicineAlbert Einstein College of MedicineBronxNY
| | - Deyou Zheng
- Department of GeneticsAlbert Einstein College of MedicineBronxNY
- Department of NeurologyAlbert Einstein College of MedicineBronxNY
- Department of NeuroscienceAlbert Einstein College of MedicineBronxNY
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19
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Craveiro Sarmento AS, Ferreira LC, Lima JG, de Azevedo Medeiros LB, Barbosa Cunha PT, Agnez-Lima LF, Galvão Ururahy MA, de Melo Campos JTA. The worldwide mutational landscape of Berardinelli-Seip congenital lipodystrophy. MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2019; 781:30-52. [PMID: 31416577 DOI: 10.1016/j.mrrev.2019.03.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 03/18/2019] [Accepted: 03/22/2019] [Indexed: 11/26/2022]
Abstract
Berardinelli-Seip congenital lipodystrophy (BSCL) is a rare disease characterized by the near total absence of body fat at birth. BSCL etiology involves genetic variations in four different genes: AGPAT2, BSCL2, CAV1, and CAVIN1. The four different biochemical subtypes of the disease are distinguished depending on which gene is mutated. The diagnosis of lipodystrophy can be based on clinical criteria, but the gold standard remains genetic testing. Since many different mutations have already been correlated with the onset of the disease, the most indicative method is DNA sequencing. However, not all laboratories have the resources to perform sequencing. Thus, less expensive techniques that include narrow gene regions may be applied. In such cases, the target mutations to be tested must be carefully determined taking into account the frequency of the description of the mutations in the literature, the nationality of the patient, as well as their phenotype. This review considers the molecular basis of BSCL, including the manual count of the majority of mutations reported in the literature up to the year 2018. Ninety different genetic mutations in 332 cases were reported at different frequencies. Some mutations were distributed homogeneously and others were specific to geographic regions. Type 2 BSCL was mentioned most often in the literature (50.3% of the cases), followed by Type 1 (38.0%), Type 4 (10.2%), and Type 3 (1.5%). The mutations comprised frameshifts (34.4%), nonsense (26.6%), and missense (21.1%). The c.517dupA in the BSCL2 gene was the most frequent (13.3%), followed by c.589-2A>G in the AGPAT2 gene (11.5%), c.507_511delGTATC in the BSCL2 gene (9.7%), c.317-588del in the AGPAT2 gene (7.3%), and c.202C>T in the AGPAT2 gene (4.5%). This information should prove valuable for analysts in making decisions regarding the best therapeutic targets in a population-specific context, which will benefit patients and enable faster and less expensive treatment.
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Affiliation(s)
- Aquiles Sales Craveiro Sarmento
- Laboratório de Biologia Molecular e Genômica, Departamento de Biologia Celular e Genética, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil
| | - Leonardo Capistrano Ferreira
- Instituto de Medicina Tropical, Departamento de Bioquímica, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil
| | - Josivan Gomes Lima
- Departamento de Medicina Clínica, Hospital Universitário Onofre Lopes, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil
| | - Lázaro Batista de Azevedo Medeiros
- Laboratório de Biologia Molecular e Genômica, Departamento de Biologia Celular e Genética, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil
| | | | - Lucymara Fassarella Agnez-Lima
- Laboratório de Biologia Molecular e Genômica, Departamento de Biologia Celular e Genética, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil
| | - Marcela Abbott Galvão Ururahy
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil
| | - Julliane Tamara Araújo de Melo Campos
- Laboratório de Biologia Molecular e Genômica, Departamento de Biologia Celular e Genética, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil.
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Patni N, Vuitch F, Garg A. Postmortem Findings in a Young Man With Congenital Generalized Lipodystrophy, Type 4 Due to CAVIN1 Mutations. J Clin Endocrinol Metab 2019; 104:957-960. [PMID: 30476128 PMCID: PMC6364506 DOI: 10.1210/jc.2018-01331] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 11/16/2018] [Indexed: 12/26/2022]
Abstract
CONTEXT Congenital generalized lipodystrophy, type 4 (CGL4) is a rare autosomal recessive disorder caused by mutations in caveolae-associated protein 1. Patients with CGL4 also have myopathy and cardiomyopathy with a predisposition for sudden death due to ventricular arrhythmias. However, the underlying pathology for these morbidities remains unknown. Therefore, we report on an autopsy of a Hispanic boy with CGL4. CASE DESCRIPTION Our patient had early-onset generalized lipodystrophy, feeding difficulties, myopathy, atlanto-axial dislocation, and learning disabilities. He was diagnosed with catecholaminergic polymorphic ventricular tachycardia (CPVT) at age 8 years, had poor compliance with medications, and died suddenly at age 15.3 years. Autopsy showed marked loss of subcutaneous and omental fat with no inflammatory cells in adipose tissue and normal adipocytes in the parathyroid glands. There were adipocytes interdigitating cardiac muscle fibers, with fibro-fatty infiltration in the right ventricle, near coronary sinus, and atrioventricular node. There was no evidence of coronary heart disease. The quadriceps femoris muscle did not show adipocyte infiltration, inflammation, or fibrosis. The muscularis mucosa layer was thickened in the esophagus and at the gastro-duodenal junction, and the esophagus had prominent, large nerves in the subserosa. The liver weighed 3000 g, with minimal chronic inflammation and steatosis in 40% of parenchyma, primarily in zones 2 and 3. There was no spermatogenesis in the spermatic tubules. CONCLUSIONS Our data suggest that fibro-fatty infiltration of the right ventricle may contribute to CPVT in patients with CGL4. Thick muscularis mucosa and large nerves in the esophagus likely contributed to dysphagia and dysmotility. A lack of spermatids suggests infertility in affected male patients.
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Affiliation(s)
- Nivedita Patni
- Division of Pediatric Endocrinology, Department of Pediatrics and Center for Human Nutrition, UT Southwestern Medical Center, Dallas, Texas
| | - Frank Vuitch
- Department of Pathology, UT Southwestern Medical Center, Dallas, Texas
| | - Abhimanyu Garg
- Division of Nutrition and Metabolic Diseases, Department of Internal Medicine and the Center for Human Nutrition; UT Southwestern Medical Center, Dallas, Texas
- Correspondence and Reprint Requests: Abhimanyu Garg, MD, Division of Nutrition and Metabolic Diseases, Department of Internal Medicine and the Center for Human Nutrition, 5323 Harry Hines Boulevard, Dallas, Texas 75390-8537. E-mail:
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Loss of LRRC25 accelerates pathological cardiac hypertrophy through promoting fibrosis and inflammation regulated by TGF-β1. Biochem Biophys Res Commun 2018; 506:137-144. [PMID: 30340835 DOI: 10.1016/j.bbrc.2018.09.065] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 09/10/2018] [Indexed: 01/07/2023]
Abstract
Despite advances in therapeutic strategies, heart failure-associated mortality rates remain high. Thus, understanding the pathophysiological molecular mechanisms involved in the remodeling process is essential for developing new and effective therapies. LRRs are present various prokaryotic and eukaryotic proteins and important for the innate immune system via regulating protein-protein interactions. LRRC25 is a member of leucine-rich repeat (LRR)-containing protein family. LRRC25 has been shown to negatively modulate nuclear factor κB (NF-κB) activation, a crucial factor related to cardiac hypertrophy. Our aim was to explore the effects of LRRC25 on cardiac hypertrophy. In the present study, LRRC25 levels were decreased in human and mouse hypertrophied hearts. LRRC25 knockout exacerbated cardiac hypertrophy responding to pressure overloading or angiotensin II (Ang II) stimulation. Deletion of LRRC25 accelerated cardiac dysfunction and fibrosis in mice subjected to aortic banding (AB). LRRC25 ablation induced a strong increase in the transcription of both hypertrophy (ANP, BNP, and β-MHC) and fibrosis associated molecules (col1, col3a1, α-SMA and fibronectin). In addition, the expression of transforming growth factor-β1 (TGF-β1), and its down-streaming signals of phosphorylated Smad2/3, was markedly induced by LRRC25 deficiency. LRRC25-knockout mice showed a significantly enhanced inflammation in response to AB surgery by promoting the activation of NF-κB signaling pathway. In mouse cardiomyocytes, LRRC25 deficiency markedly elevated TGF-β1 and NF-κB activation stimulated by Ang II. Treatment with a combination of TGF-β1 or NF-κB inhibitor abolished the effects of LRRC25-knockout on the promotion of cardiac hypertrophy in vitro. Together, our study identified LRRC25 as a critical molecular switch whose down-regulation resulted in cardiac hypertrophy in a TGF-β1- and NF-κB-dependent manner.
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Wasala NB, Shin JH, Lai Y, Yue Y, Montanaro F, Duan D. Cardiac-Specific Expression of ΔH2-R15 Mini-Dystrophin Normalized All Electrocardiogram Abnormalities and the End-Diastolic Volume in a 23-Month-Old Mouse Model of Duchenne Dilated Cardiomyopathy. Hum Gene Ther 2018; 29:737-748. [PMID: 29433343 DOI: 10.1089/hum.2017.144] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Heart disease is a major health threat for Duchenne/Becker muscular dystrophy patients and carriers. Expression of a 6-8 kb mini-dystrophin gene in the heart holds promise to change the disease course dramatically. However, the mini-dystrophin gene cannot be easily studied with adeno-associated virus (AAV) gene delivery because the size of the minigene exceeds AAV packaging capacity. Cardiac protection of the ΔH2-R19 minigene was previously studied using the cardiac-specific transgenic approach. Although this minigene fully normalized skeletal muscle force, it only partially corrected electrocardiogram and heart hemodynamics in dystrophin-null mdx mice that had moderate cardiomyopathy. This study evaluated the ΔH2-R15 minigene using the same transgenic approach in mdx mice that had more severe cardiomyopathy. In contrast to the ΔH2-R19 minigene, the ΔH2-R15 minigene carries dystrophin spectrin-like repeats 16 to 19 (R16-19), a region that has been suggested to protect the heart in clinical studies. Cardiac expression of the ΔH2-R15 minigene normalized all aberrant electrocardiogram changes and improved hemodynamics. Importantly, it corrected the end-diastolic volume, an important diastolic parameter not rescued by ΔH2-R19 mini-dystrophin. It is concluded that that ΔH2-R15 mini-dystrophin is a superior candidate gene for heart protection. This finding has important implications in the design of the mini/micro-dystrophin gene for Duchenne cardiomyopathy therapy.
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Affiliation(s)
- Nalinda B Wasala
- 1 Department of Molecular Microbiology and Immunology, The University of Missouri , Columbia, Missouri
| | - Jin-Hong Shin
- 1 Department of Molecular Microbiology and Immunology, The University of Missouri , Columbia, Missouri
| | - Yi Lai
- 1 Department of Molecular Microbiology and Immunology, The University of Missouri , Columbia, Missouri
| | - Yongping Yue
- 1 Department of Molecular Microbiology and Immunology, The University of Missouri , Columbia, Missouri
| | - Federica Montanaro
- 2 Dubowitz Neuromuscular Centre, Molecular Neurosciences Section, Developmental Neurosciences Programme, UCL Great Ormond Street Institute of Child Health , London, United Kingdom
| | - Dongsheng Duan
- 1 Department of Molecular Microbiology and Immunology, The University of Missouri , Columbia, Missouri.,3 Department of Neurology, School of Medicine, The University of Missouri , Columbia, Missouri.,4 Department of Bioengineering, The University of Missouri , Columbia, Missouri.,5 Department of Biomedical Sciences, College of Veterinary Medicine, The University of Missouri , Columbia, Missouri
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Norman R, Fuller W, Calaghan S. Caveolae and the cardiac myocyte. CURRENT OPINION IN PHYSIOLOGY 2018. [DOI: 10.1016/j.cophys.2017.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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24
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Wu D, Xie F, Xiao L, Feng F, Huang S, He L, Liu M, Zhou Q, Li L, Chen L. Caveolin-1-Autophagy Pathway Mediated Cardiomyocyte Hypertrophy Induced by Apelin-13. DNA Cell Biol 2017; 36:611-618. [DOI: 10.1089/dna.2016.3574] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Affiliation(s)
- Di Wu
- Institute of Pharmacy and Pharmacology, University of South China, Hengyang, China
| | - Feng Xie
- Institute of Pharmacy and Pharmacology, University of South China, Hengyang, China
| | - Ling Xiao
- Institute of Pharmacy and Pharmacology, University of South China, Hengyang, China
| | - Fen Feng
- Institute of Pharmacy and Pharmacology, University of South China, Hengyang, China
| | - Shifang Huang
- Institute of Pharmacy and Pharmacology, University of South China, Hengyang, China
| | - Lu He
- Institute of Pharmacy and Pharmacology, University of South China, Hengyang, China
| | - Meiqing Liu
- Institute of Pharmacy and Pharmacology, University of South China, Hengyang, China
| | - Qun Zhou
- Institute of Pharmacy and Pharmacology, University of South China, Hengyang, China
| | - Lanfang Li
- Institute of Pharmacy and Pharmacology, University of South China, Hengyang, China
| | - Linxi Chen
- Institute of Pharmacy and Pharmacology, University of South China, Hengyang, China
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Kaakinen M, Reichelt ME, Ma Z, Ferguson C, Martel N, Porrello ER, Hudson JE, Thomas WG, Parton RG, Headrick JP. Cavin-1 deficiency modifies myocardial and coronary function, stretch responses and ischaemic tolerance: roles of NOS over-activity. Basic Res Cardiol 2017; 112:24. [PMID: 28343262 DOI: 10.1007/s00395-017-0613-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 02/09/2017] [Accepted: 03/09/2017] [Indexed: 02/07/2023]
Abstract
Caveolae and associated cavin and caveolins may govern myocardial function, together with responses to mechanical and ischaemic stresses. Abnormalities in these proteins are also implicated in different cardiovascular disorders. However, specific roles of the cavin-1 protein in cardiac and coronary responses to mechanical/metabolic perturbation remain unclear. We characterised cardiovascular impacts of cavin-1 deficiency, comparing myocardial and coronary phenotypes and responses to stretch and ischaemia-reperfusion in hearts from cavin-1 +/+ and cavin-1 -/- mice. Caveolae and caveolins 1 and 3 were depleted in cavin-1 -/- hearts. Cardiac ejection properties in situ were modestly reduced in cavin-1 -/- mice. While peak contractile performance in ex vivo myocardium from cavin-1 -/- and cavin-1 +/+ mice was comparable, intrinsic beating rate, diastolic stiffness and Frank-Starling behaviour (stretch-dependent diastolic and systolic forces) were exaggerated in cavin-1 -/- hearts. Increases in stretch-dependent forces were countered by NOS inhibition (100 µM L-NAME), which exposed negative inotropy in cavin-1 -/- hearts, and were mimicked by 100 µM nitroprusside. In contrast, chronotropic differences appeared largely NOS-independent. Cavin-1 deletion also induced NOS-dependent coronary dilatation, ≥3-fold prolongation of reactive hyperaemic responses, and exaggerated pressure-dependence of coronary flow. Stretch-dependent efflux of lactate dehydrogenase and cardiac troponin I was increased and induction of brain natriuretic peptide and c-Fos inhibited in cavin-1 -/- hearts, while ERK1/2 phospho-activation was preserved. Post-ischaemic dysfunction and damage was also exaggerated in cavin-1 -/- hearts. Diverse effects of cavin-1 deletion reveal important roles in both NOS-dependent and -independent control of cardiac and coronary functions, together with governing sarcolemmal fragility and myocardial responses to stretch and ischaemia.
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Affiliation(s)
- Mika Kaakinen
- Oulu Center for Cell-Matrix Research, Faculty of Biochemistry and Molecular Medicine, Biocenter Oulu, University of Oulu, Oulu, Finland.,Institute for Molecular Biosciences, The University of Queensland, St Lucia, QLD, 4072, Australia
| | - Melissa E Reichelt
- School of Biomedical Sciences, The University of Queensland, Brisbane, Australia
| | - Zhibin Ma
- School of Biomedical Sciences, The University of Queensland, Brisbane, Australia
| | - Charles Ferguson
- Institute for Molecular Biosciences, The University of Queensland, St Lucia, QLD, 4072, Australia
| | - Nick Martel
- Institute for Molecular Biosciences, The University of Queensland, St Lucia, QLD, 4072, Australia
| | - Enzo R Porrello
- School of Biomedical Sciences, The University of Queensland, Brisbane, Australia
| | - James E Hudson
- School of Biomedical Sciences, The University of Queensland, Brisbane, Australia
| | - Walter G Thomas
- School of Biomedical Sciences, The University of Queensland, Brisbane, Australia
| | - Robert G Parton
- Institute for Molecular Biosciences, The University of Queensland, St Lucia, QLD, 4072, Australia.
| | - John P Headrick
- School of Medical Science, Griffith University, Southport, QLD, 4217, Australia.
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Abstract
ice and humans lacking the caveolae component polymerase I transcription release factor (PTRF, also known as cavin-1) exhibit lipo- and muscular dystrophy. Here we describe the molecular features underlying the muscle phenotype for PTRF/cavin-1 null mice. These animals had a decreased ability to exercise, and exhibited muscle hypertrophy with increased muscle fiber size and muscle mass due, in part, to constitutive activation of the Akt pathway. Their muscles were fibrotic and exhibited impaired membrane integrity accompanied by an apparent compensatory activation of the dystrophin-glycoprotein complex along with elevated expression of proteins involved in muscle repair function. Ptrf deletion also caused decreased mitochondrial function, oxygen consumption, and altered myofiber composition. Thus, in addition to compromised adipocyte-related physiology, the absence of PTRF/cavin-1 in mice caused a unique form of muscular dystrophy with a phenotype similar or identical to that seen in humans lacking this protein. Further understanding of this muscular dystrophy model will provide information relevant to the human situation and guidance for potential therapies.
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Affiliation(s)
| | | | - Paul F Pilch
- Department of Biochemistry.,Department of Medicine, Boston University School of Medicine, Boston, Massachusetts, USA
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