1
|
Callan-Sidat A, Zewdu E, Cavallaro M, Liu J, Hebenstreit D. N-terminal tagging of RNA Polymerase II shapes transcriptomes more than C-terminal alterations. iScience 2024; 27:109914. [PMID: 38799575 PMCID: PMC11126984 DOI: 10.1016/j.isci.2024.109914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 02/14/2024] [Accepted: 05/03/2024] [Indexed: 05/29/2024] Open
Abstract
RNA polymerase II (Pol II) has a C-terminal domain (CTD) that is unstructured, consisting of a large number of heptad repeats, and whose precise function remains unclear. Here, we investigate how altering the CTD's length and fusing it with protein tags affects transcriptional output on a genome-wide scale in mammalian cells at single-cell resolution. While transcription generally appears to occur in burst-like fashion, where RNA is predominantly made during short bursts of activity that are interspersed with periods of transcriptional silence, the CTD's role in shaping these dynamics seems gene-dependent; global patterns of bursting appear mostly robust to CTD alterations. Introducing protein tags with defined structures to the N terminus cause transcriptome-wide effects, however. We find the type of tag to dominate characteristics of the resulting transcriptomes. This is possibly due to Pol II-interacting factors, including non-coding RNAs, whose expression correlates with the tags. Proteins involved in liquid-liquid phase separation appear prominently.
Collapse
Affiliation(s)
- Adam Callan-Sidat
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, UK
- Warwick Medical School, University of Warwick, Coventry CV4 7AL, UK
| | - Emmanuel Zewdu
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, UK
| | - Massimo Cavallaro
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, UK
- School of Computing and Mathematical Sciences, University of Leicester, Leicester LE1 7RH, UK
| | - Juntai Liu
- Department of Physics, University of Warwick, Coventry CV4 7AL, UK
| | | |
Collapse
|
2
|
Zarzycka W, Kobak KA, King CJ, Peelor FF, Miller BF, Chiao YA. Hyperactive mTORC1/4EBP1 Signaling Dysregulates Proteostasis and Accelerates Cardiac Aging. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.13.594044. [PMID: 38798509 PMCID: PMC11118374 DOI: 10.1101/2024.05.13.594044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
The mechanistic target of rapamycin complex 1 (mTORC1) has a major impact on aging by regulation of proteostasis. It is well established that mTORC1 signaling is hyperactivated with aging and age-related diseases. Previous studies have shown that partial inhibition of mTOR signaling by rapamycin reverses the age-related decline in cardiac function and structure in old mice. However, the downstream signaling pathways involved in this protection against cardiac aging have not been established. TORC1 phosphorylates 4E-binding protein 1 (4EBP1) to promote the initiation of cap-dependent translation. The aim of this project is to examine the role of the mTORC1/4EBP1 axis in age-related cardiac dysfunction. We utilized a whole-body 4EBP1 KO mouse model, which mimics a hyperactive 4EBP1/eIF4E axis, to investigate the effects of hyperactive mTORC1/4EBP1 axis in cardiac aging. Echocardiographic measurements revealed that young 4EBP1 KO mice have no difference in cardiac function at baseline compared to WT mice. Interestingly, middle-aged (14-15-month-old) 4EBP1 KO mice show impaired diastolic function and myocardial performance compared to age-matched WT mice and their diastolic function and myocardial performance are at similar levels as 24-month-old WT mice, suggesting that 4EBP1 KO mice experience accelerated cardiac aging. Old 4EBP1 KO mice show further declines in systolic and diastolic function compared to middle-aged 4EBP1 KO mice and have worse systolic and diastolic function than age-matched old WT mice. Gene expression levels of heart failure markers are not different between 4EBP1 KO and WT mice at these advanced ages. However, ribosomal biogenesis and overall protein ubiquitination are significantly increased in 4EBP1 KO mice when compared to WT, which suggests dysregulated proteostasis. Together, these results show that a hyperactive 4EBP1/eIF4E axis accelerates cardiac aging, potentially by dysregulating proteostasis.
Collapse
|
3
|
Thorkelsson A, Chin MT. Role of the Alpha-B-Crystallin Protein in Cardiomyopathic Disease. Int J Mol Sci 2024; 25:2826. [PMID: 38474073 DOI: 10.3390/ijms25052826] [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: 01/17/2024] [Revised: 02/23/2024] [Accepted: 02/26/2024] [Indexed: 03/14/2024] Open
Abstract
Alpha-B-crystallin, a member of the small heat shock family of proteins, has been implicated in a variety of cardiomyopathies and in normal cardiac homeostasis. It is known to function as a molecular chaperone, particularly for desmin, but also interacts with a wide variety of additional proteins. The molecular chaperone function is also enhanced by signal-dependent phosphorylation at specific residues under stress conditions. Naturally occurring mutations in CRYAB, the gene that encodes alpha-B-crystallin, have been suggested to alter ionic intermolecular interactions that affect dimerization and chaperone function. These mutations have been associated with myofibrillar myopathy, restrictive cardiomyopathy, and hypertrophic cardiomyopathy and promote pathological hypertrophy through different mechanisms such as desmin aggregation, increased reductive stress, or activation of calcineurin-NFAT signaling. This review will discuss the known mechanisms by which alpha-B-crystallin functions in cardiac homeostasis and the pathogenesis of cardiomyopathies and provide insight into potential future areas of exploration.
Collapse
Affiliation(s)
- Andres Thorkelsson
- Tufts University School of Medicine, Tufts University, Boston, MA 02111, USA
| | - Michael T Chin
- Tufts University School of Medicine, Tufts University, Boston, MA 02111, USA
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA 02111, USA
| |
Collapse
|
4
|
Hosseini Jafari M, Shahsavani MB, Hoshino M, Hong J, Saboury AA, Moosavi-Movahedi AA, Yousefi R. Unveiling the structural and functional consequences of the p.D109G pathogenic mutation in human αB-Crystallin responsible for restrictive cardiomyopathy and skeletal myopathy. Int J Biol Macromol 2024; 254:127933. [PMID: 37939764 DOI: 10.1016/j.ijbiomac.2023.127933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 11/02/2023] [Accepted: 11/05/2023] [Indexed: 11/10/2023]
Abstract
αB-Crystallin (αB-Cry) is expressed in many tissues, and mutations in this protein are linked to various diseases, including cataracts, Alzheimer's disease, Parkinson's disease, and several types of myopathies and cardiomyopathies. The p.D109G mutation, which substitutes a conserved aspartate residue involved in the interchain salt bridges, with glycine leads to the development of both restrictive cardiomyopathy (RCM) and skeletal myopathy. In this study, we generated this mutation in the α-Cry domain (ACD) which is crucial for forming the active chaperone dimeric state, using site-directed mutagenesis. After inducing expression in the bacterial host, we purified the mutant and wild-type recombinant proteins using anion exchange chromatography. Various spectroscopic evaluations revealed significant changes in the secondary, tertiary, and quaternary structures of human αB-Cry caused by this mutation. Furthermore, this pathogenic mutation led to the formation of protein oligomers with larger sizes than those of the wild-type protein counterpart. The mutant protein also exhibited increased chaperone activity and decreased chemical, thermal, and proteolytic stability. Atomic force microscopy (AFM), transmission electron microscopy (TEM), and fluorescence microscopy (FM) demonstrated that p.D109G mutant protein is more prone to forming amyloid aggregates. The misfolding associated with the p.D109G mutation may result in abnormal interactions of human αB-Cry with its natural partners (e.g., desmin), leading to the formation of protein aggregates. These aggregates can interfere with normal cellular processes and may contribute to muscle cell dysfunction and damage, resulting in the pathogenic involvement of the p.D109G mutant protein in restrictive cardiomyopathy and skeletal myopathy.
Collapse
Affiliation(s)
- Mehrnaz Hosseini Jafari
- Protein Chemistry Laboratory (PCL), Institute of Biochemistry and Biophysics (IBB), University of Tehran, Tehran, Iran
| | | | - Masaru Hoshino
- Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto 606-8501, Japan
| | - Jun Hong
- School of Life Sciences, Henan University, Kaifeng 475000, People's Republic of China
| | - Ali Akbar Saboury
- Institute of Biochemistry and Biophysics (IBB), University of Tehran, Tehran, Iran
| | | | - Reza Yousefi
- Protein Chemistry Laboratory (PCL), Institute of Biochemistry and Biophysics (IBB), University of Tehran, Tehran, Iran.
| |
Collapse
|
5
|
Martin TG, Pak H, Gerhard GS, Merali S, Merali C, Lemster B, Dubey P, McTiernan CF, Bristow MR, Feldman AM, Kirk JA. Dysregulated Autophagy and Sarcomere Dysfunction in Patients With Heart Failure With Co-Occurrence of P63A and P380S BAG3 Variants. J Am Heart Assoc 2023; 12:e029938. [PMID: 38108245 PMCID: PMC10863766 DOI: 10.1161/jaha.123.029938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 11/15/2023] [Indexed: 12/19/2023]
Abstract
BACKGROUND Mutations to the co-chaperone protein BAG3 (B-cell lymphoma-2-associated athanogene-3) are a leading cause of dilated cardiomyopathy (DCM). These mutations often impact the C-terminal BAG domain (residues 420-499), which regulates heat shock protein 70-dependent protein turnover via autophagy. While mutations in other regions are less common, previous studies in patients with DCM found that co-occurrence of 2 BAG3 variants (P63A, P380S) led to worse prognosis. However, the underlying mechanism for dysfunction is not fully understood. METHODS AND RESULTS In this study, we used proteomics, Western blots, and myofilament functional assays on left ventricular tissue from patients with nonfailing, DCM, and DCM with BAG363/380 to determine how these mutations impact protein quality control and cardiomyocyte contractile function. We found dysregulated autophagy and increased protein ubiquitination in patients with BAG363/380 compared with nonfailing and DCM, suggesting impaired protein turnover. Expression and myofilament localization of BAG3-binding proteins were also uniquely altered in the BAG3,63/380 including abolished localization of the small heat shock protein CRYAB (alpha-crystallin B chain) to the sarcomere. To determine whether these variants impacted sarcomere function, we used cardiomyocyte force-calcium assays and found reduced maximal calcium-activated force in DCM and BAG363/380. Interestingly, myofilament calcium sensitivity was increased in DCM but not with BAG363/380, which was not explained by differences in troponin I phosphorylation. CONCLUSIONS Together, our data support that the disease-enhancing mechanism for BAG3 variants outside of the BAG domain is through disrupted protein turnover leading to compromised sarcomere function. These findings suggest a shared mechanism of disease among pathogenic BAG3 variants, regardless of location.
Collapse
Affiliation(s)
- Thomas G. Martin
- Department of Cell and Molecular PhysiologyLoyola University Chicago Stritch School of MedicineMaywoodIL
| | - Hana Pak
- Department of Cell and Molecular PhysiologyLoyola University Chicago Stritch School of MedicineMaywoodIL
| | - Glenn S. Gerhard
- Department of Medical Genetics and Molecular BiochemistryLewis Katz School of Medicine of Temple UniversityPhiladelphiaPA
| | - Salim Merali
- Temple University School of PharmacyPhiladelphiaPA
| | | | - Bonnie Lemster
- The Heart and Vascular Institute, The University of Pittsburgh School of MedicinePittsburghPA
| | - Praveen Dubey
- Department of Biomedical EngineeringUniversity of Alabama at BirminghamBirminghamAL
| | - Charles F. McTiernan
- The Heart and Vascular Institute, The University of Pittsburgh School of MedicinePittsburghPA
| | | | - Arthur M. Feldman
- Department of Medicine, Division of CardiologyThe Lewis Katz School of Medicine at Temple UniversityPhiladelphiaPA
| | - Jonathan A. Kirk
- Department of Cell and Molecular PhysiologyLoyola University Chicago Stritch School of MedicineMaywoodIL
| |
Collapse
|
6
|
West G, Sedighi S, Agnetti G, Taimen P. Intermediate filaments in the heart: The dynamic duo of desmin and lamins orchestrates mechanical force transmission. Curr Opin Cell Biol 2023; 85:102280. [PMID: 37972529 DOI: 10.1016/j.ceb.2023.102280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 10/05/2023] [Accepted: 10/25/2023] [Indexed: 11/19/2023]
Abstract
The intermediate filament (IF) cytoskeleton supports cellular structural integrity, particularly in response to mechanical stress. The most abundant IF proteins in mature cardiomyocytes are desmin and lamins. The desmin network tethers the contractile apparatus and organelles to the nuclear envelope and the sarcolemma, while lamins, as components of the nuclear lamina, provide structural stability to the nucleus and the genome. Mutations in desmin or A-type lamins typically result in cardiomyopathies and recent studies emphasized the synergistic roles of desmin and lamins in the maintenance of nuclear integrity in cardiac myocytes. Here we explore the emerging roles of the interdependent relationship between desmin and lamins in providing resilience to nuclear structure while transducing extracellular mechanical cues into the nucleus.
Collapse
Affiliation(s)
- Gun West
- Institute of Biomedicine and FICAN West Cancer Centre, University of Turku, 20520, Turku, Finland
| | - Sogol Sedighi
- Johns Hopkins University School of Medicine, 21205, Baltimore, MD, USA
| | - Giulio Agnetti
- Johns Hopkins University School of Medicine, 21205, Baltimore, MD, USA; DIBINEM - University of Bologna, 40123, Bologna, Italy.
| | - Pekka Taimen
- Institute of Biomedicine and FICAN West Cancer Centre, University of Turku, 20520, Turku, Finland; Department of Pathology, Turku University Hospital, 20520, Turku, Finland.
| |
Collapse
|
7
|
Zhao Z, Brooks D, Guo Y, Geisbrecht ER. Identification of CryAB as a target of NUAK kinase activity in Drosophila muscle tissue. Genetics 2023; 225:iyad167. [PMID: 37713608 PMCID: PMC10627272 DOI: 10.1093/genetics/iyad167] [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: 06/28/2023] [Revised: 08/28/2023] [Accepted: 08/30/2023] [Indexed: 09/17/2023] Open
Abstract
Phosphorylation reactions performed by protein kinases are one of the most studied post-translational modifications within cells. Much is understood about conserved residues within protein kinase domains that perform catalysis of the phosphotransfer reaction, yet the identity of the target substrates and downstream biological effects vary widely among cells, tissues, and organisms. Here, we characterize key residues essential for NUAK kinase activity in Drosophila melanogaster myogenesis and homeostasis. Creation of a NUAK kinase-dead mutation using Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR)/Cas9 results in lethality at the embryo to larval transition, while loss of NUAK catalytic function later in development produces aggregation of the chaperone protein αB-crystallin/CryAB in muscle tissue. Yeast 2-hybrid assays demonstrate a physical interaction between NUAK and CryAB. We further show that a phospho-mimetic version of NUAK promotes the phosphorylation of CryAB and this post-translational modification occurs at 2 previously unidentified phosphosites that are conserved in the primary sequence of human CryAB. Mutation of these serine residues in D. melanogaster NUAK abolishes CryAB phosphorylation, thus, proving their necessity at the biochemical level. These studies together highlight the importance of kinase activity regulation and provide a platform to further explore muscle tissue proteostasis.
Collapse
Affiliation(s)
- Ziwei Zhao
- Department of Biochemistry and Molecular Biophysics, Kansas State University, 1711 Claflin Rd, Manhattan, KS 66506, USA
| | - David Brooks
- Department of Biochemistry and Molecular Biophysics, Kansas State University, 1711 Claflin Rd, Manhattan, KS 66506, USA
| | - Yungui Guo
- Department of Biochemistry and Molecular Biophysics, Kansas State University, 1711 Claflin Rd, Manhattan, KS 66506, USA
| | - Erika R Geisbrecht
- Department of Biochemistry and Molecular Biophysics, Kansas State University, 1711 Claflin Rd, Manhattan, KS 66506, USA
| |
Collapse
|
8
|
Doroudgar S. Resolving Proteotoxicity: Genetic Examination of Proteasome Activation by PKA In Vivo. Circ Res 2023; 133:588-591. [PMID: 37708246 DOI: 10.1161/circresaha.123.323502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Affiliation(s)
- Shirin Doroudgar
- Department of Internal Medicine and the Translational Cardiovascular Research Center, University of Arizona College of Medicine - Phoenix, Phoenix, AZ
| |
Collapse
|
9
|
Tanaka Y, Kadota S, Zhao J, Kobayashi H, Okano S, Izumi M, Honda Y, Ichimura H, Shiba N, Uemura T, Wada Y, Chuma S, Nakada T, Tohyama S, Fukuda K, Yamada M, Seto T, Kuwahara K, Shiba Y. Mature human induced pluripotent stem cell-derived cardiomyocytes promote angiogenesis through alpha-B crystallin. Stem Cell Res Ther 2023; 14:240. [PMID: 37679796 PMCID: PMC10486094 DOI: 10.1186/s13287-023-03468-4] [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: 11/04/2022] [Accepted: 08/22/2023] [Indexed: 09/09/2023] Open
Abstract
BACKGROUND Human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) can be used to treat heart diseases; however, the optimal maturity of hiPSC-CMs for effective regenerative medicine remains unclear. We aimed to investigate the benefits of long-term cultured mature hiPSC-CMs in injured rat hearts. METHODS Cardiomyocytes were differentiated from hiPSCs via monolayer culturing, and the cells were harvested on day 28 or 56 (D28-CMs or D56-CMs, respectively) after differentiation. We transplanted D28-CMs or D56-CMs into the hearts of rat myocardial infarction models and examined cell retention and engraftment via in vivo bioluminescence imaging and histological analysis. We performed transcriptomic sequencing analysis to elucidate the genetic profiles before and after hiPSC-CM transplantation. RESULTS Upregulated expression of mature sarcomere genes in vitro was observed in D56-CMs compared with D28-CMs. In vivo bioluminescence imaging studies revealed increased bioluminescence intensity of D56-CMs at 8 and 12 weeks post-transplantation. Histological and immunohistochemical analyses showed that D56-CMs promoted engraftment and maturation in the graft area at 12 weeks post-transplantation. Notably, D56-CMs consistently promoted microvessel formation in the graft area from 1 to 12 weeks post-transplantation. Transcriptomic sequencing analysis revealed that compared with the engrafted D28-CMs, the engrafted D56-CMs enriched genes related to blood vessel regulation at 12 weeks post-transplantation. As shown by transcriptomic and western blot analyses, the expression of a small heat shock protein, alpha-B crystallin (CRYAB), was significantly upregulated in D56-CMs compared with D28-CMs. Endothelial cell migration was inhibited by small interfering RNA-mediated knockdown of CRYAB when co-cultured with D56-CMs in vitro. Furthermore, CRYAB overexpression enhanced angiogenesis in the D28-CM grafts at 4 weeks post-transplantation. CONCLUSIONS Long-term cultured mature hiPSC-CMs promoted engraftment, maturation and angiogenesis post-transplantation in infarcted rat hearts. CRYAB, which was highly expressed in D56-CMs, was identified as an angiogenic factor from mature hiPSC-CMs. This study revealed the benefits of long-term culture, which may enhance the therapeutic potential of hiPSC-CMs.
Collapse
Affiliation(s)
- Yuki Tanaka
- Department of Regenerative Science and Medicine, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, 390-8621, Japan
- Division of Cardiovascular Surgery, Department of Surgery, Shinshu University School of Medicine, Matsumoto, 390-8621, Japan
| | - Shin Kadota
- Department of Regenerative Science and Medicine, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, 390-8621, Japan.
- Institute for Biomedical Sciences, Shinshu University, Matsumoto, 390-8621, Japan.
| | - Jian Zhao
- Department of Regenerative Science and Medicine, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, 390-8621, Japan
| | - Hideki Kobayashi
- Department of Regenerative Science and Medicine, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, 390-8621, Japan
- Department of Cardiovascular Medicine, Shinshu University School of Medicine, Matsumoto, 390-8621, Japan
| | - Satomi Okano
- Department of Regenerative Science and Medicine, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, 390-8621, Japan
- Department of Physical Therapy, Faculty of Health Sciences, Iryo Sosei University, Iwaki, 970-8551, Japan
| | - Masaki Izumi
- Department of Regenerative Science and Medicine, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, 390-8621, Japan
- Division of Diabetes, Endocrinology and Metabolism, Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, 390-8621, Japan
| | - Yusuke Honda
- Department of Regenerative Science and Medicine, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, 390-8621, Japan
| | - Hajime Ichimura
- Department of Regenerative Science and Medicine, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, 390-8621, Japan
- Division of Cardiovascular Surgery, Department of Surgery, Shinshu University School of Medicine, Matsumoto, 390-8621, Japan
| | - Naoko Shiba
- Department of Regenerative Science and Medicine, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, 390-8621, Japan
- Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, 390-8621, Japan
| | - Takeshi Uemura
- Institute for Biomedical Sciences, Shinshu University, Matsumoto, 390-8621, Japan
- Division of Gene Research, Research Center for Advanced Science and Technology, Shinshu University, Matsumoto, 390-8621, Japan
| | - Yuko Wada
- Division of Cardiovascular Surgery, Department of Surgery, Shinshu University School of Medicine, Matsumoto, 390-8621, Japan
| | - Shinichiro Chuma
- Department of Regeneration Science and Engineering, Institute for Life and Medical Sciences, Kyoto University, Kyoto, 606-8507, Japan
| | - Tsutomu Nakada
- Division of Instrumental Analysis, Research Center for Advanced Science and Technology, Shinshu University, Matsumoto, 390-8621, Japan
| | - Shugo Tohyama
- Department of Cardiology, Keio University School of Medicine, Tokyo, 160-8582, Japan
| | - Keiichi Fukuda
- Department of Cardiology, Keio University School of Medicine, Tokyo, 160-8582, Japan
| | - Mitsuhiko Yamada
- Department of Molecular Pharmacology, Shinshu University School of Medicine, Matsumoto, 390-8621, Japan
| | - Tatsuichiro Seto
- Division of Cardiovascular Surgery, Department of Surgery, Shinshu University School of Medicine, Matsumoto, 390-8621, Japan
| | - Koichiro Kuwahara
- Institute for Biomedical Sciences, Shinshu University, Matsumoto, 390-8621, Japan
- Department of Cardiovascular Medicine, Shinshu University School of Medicine, Matsumoto, 390-8621, Japan
| | - Yuji Shiba
- Department of Regenerative Science and Medicine, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, 390-8621, Japan.
- Institute for Biomedical Sciences, Shinshu University, Matsumoto, 390-8621, Japan.
| |
Collapse
|
10
|
Basha S, Mukunda DC, Rodrigues J, Gail D'Souza M, Gangadharan G, Pai AR, Mahato KK. A comprehensive review of protein misfolding disorders, underlying mechanism, clinical diagnosis, and therapeutic strategies. Ageing Res Rev 2023; 90:102017. [PMID: 37468112 DOI: 10.1016/j.arr.2023.102017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 07/14/2023] [Accepted: 07/14/2023] [Indexed: 07/21/2023]
Abstract
INTRODUCTION Proteins are the most common biological macromolecules in living system and are building blocks of life. They are extremely dynamic in structure and functions. Due to several modifications, proteins undergo misfolding, leading to aggregation and thereby developing neurodegenerative and systemic diseases. Understanding the pathology of these diseases and the techniques used to diagnose them is therefore crucial for their effective management . There are several techniques, currently being in use to diagnose them and those will be discussed in this review. AIM/OBJECTIVES Current review aims to discuss an overview of protein aggregation and the underlying mechanisms linked to neurodegeneration and systemic diseases. Also, the review highlights protein misfolding disorders, their clinical diagnosis, and treatment strategies. METHODOLOGY Literature related to neurodegenerative and systemic diseases was explored through PubMed, Google Scholar, Scopus, and Medline databases. The keywords used for literature survey and analysis are protein aggregation, neurodegenerative disorders, Alzheimer's disease, Parkinson's disease, systemic diseases, protein aggregation mechanisms, etc. DISCUSSION /CONCLUSION: This review summarises the pathogenesis of neurodegenerative and systemic disorders caused by protein misfolding and aggregation. The clinical diagnosis and therapeutic strategies adopted for the management of these diseases are also discussed to aid in a better understanding of protein misfolding disorders. Many significant concerns about the role, characteristics, and consequences of protein aggregates in neurodegenerative and systemic diseases are not clearly understood to date. Regardless of technological advancements, there are still great difficulties in the management and cure of these diseases. Therefore, for better understanding, diagnosis, and treatment of neurodegenerative and systemic diseases, more studies to identify novel drugs that may aid in their treatment and management are required.
Collapse
Affiliation(s)
- Shaik Basha
- Department of Biophysics, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | | | - Jackson Rodrigues
- Department of Biophysics, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Meagan Gail D'Souza
- Department of Biophysics, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Gireesh Gangadharan
- Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Aparna Ramakrishna Pai
- Department of Neurology, Kasturba Medical College - Manipal, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Krishna Kishore Mahato
- Department of Biophysics, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India.
| |
Collapse
|
11
|
Luo R, Huan C, Gao Q, Pan H, Chen P, Liu X, Gao S. AlphaB-crystallin promotes porcine circovirus type 2 replication in a cell proliferation-dependent manner. Virus Res 2021; 301:198435. [PMID: 33961899 DOI: 10.1016/j.virusres.2021.198435] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 04/06/2021] [Accepted: 04/21/2021] [Indexed: 11/20/2022]
Abstract
Porcine circovirus type 2 (PCV2) is the primary causative agent of postweaning multisystemic wasting syndrome (PMWS) and causes heavy economic losses to the porcine industry worldwide. In this study, PK-15 cells were infected with PCV2 for 48 h, then harvested and subjected to label-free quantitative proteomic mass spectrometry. In total, 1212 proteins were differentially expressed in PCV2-infected cells compared with mock-infected cells, including 796 upregulated and 416 downregulated proteins. Gene ontology analysis showed that these differentially expressed proteins were involved in biological processes, cellular components and molecular functions, and these categories included cellular processes, environmental information processing, genetic information processing, disease, metabolism, and body systems. Enrichment analysis of the KEGG pathway showed that innate immune responses were significantly enriched. AlphaB-crystallin (CRYAB) interacts with desmin and cytoplasmic actin to prevent protein misfolding and aggregation, helping to maintain cytoskeletal integrity and promoting cell proliferation. In this study, CRYAB was found to effect the replication of PCV2, as verified by qRT-PCR, TCID50 determination and western blot analysis. Overexpression of CRYAB significantly upregulated PCV2 capsid protein and increased viral titers in both PK-15 cells and culture supernatants, whereas the opposite results were obtained in CRYAB knockdown cells. Furthermore, we revealed that the promotion of PCV2 replication by CRYAB was dependent on cell proliferation. To our knowledge, this is the first report of the effect of CRYAB on PCV2 replication and our findings contribute to a greater understanding of the mechanism of PCV2 replication and pathogenesis, as well as the host's response to PCV2 infection.
Collapse
Affiliation(s)
- Rongdi Luo
- Key Laboratory of Avian Bioproduct Development, Ministry of Agriculture and Rural Affairs, Yangzhou University, Yangzhou, Jiangsu, 225009, China; Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, Jiangsu, 225009, China; Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou, Jiangsu, 225009, China; College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - Changchao Huan
- Key Laboratory of Avian Bioproduct Development, Ministry of Agriculture and Rural Affairs, Yangzhou University, Yangzhou, Jiangsu, 225009, China; Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, Jiangsu, 225009, China; Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou, Jiangsu, 225009, China; College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - Qingqing Gao
- Key Laboratory of Avian Bioproduct Development, Ministry of Agriculture and Rural Affairs, Yangzhou University, Yangzhou, Jiangsu, 225009, China; Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, Jiangsu, 225009, China; Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou, Jiangsu, 225009, China; College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - Haochun Pan
- Key Laboratory of Avian Bioproduct Development, Ministry of Agriculture and Rural Affairs, Yangzhou University, Yangzhou, Jiangsu, 225009, China; Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, Jiangsu, 225009, China; Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou, Jiangsu, 225009, China; College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - Pengxiang Chen
- Key Laboratory of Avian Bioproduct Development, Ministry of Agriculture and Rural Affairs, Yangzhou University, Yangzhou, Jiangsu, 225009, China; Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, Jiangsu, 225009, China; Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou, Jiangsu, 225009, China; College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - Xiufan Liu
- Key Laboratory of Avian Bioproduct Development, Ministry of Agriculture and Rural Affairs, Yangzhou University, Yangzhou, Jiangsu, 225009, China; Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, Jiangsu, 225009, China; Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou, Jiangsu, 225009, China; College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - Song Gao
- Key Laboratory of Avian Bioproduct Development, Ministry of Agriculture and Rural Affairs, Yangzhou University, Yangzhou, Jiangsu, 225009, China; Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, Jiangsu, 225009, China; Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou, Jiangsu, 225009, China; College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, China.
| |
Collapse
|
12
|
Li J, Zou J, Littlejohn R, Liu J, Su H. Neddylation, an Emerging Mechanism Regulating Cardiac Development and Function. Front Physiol 2020; 11:612927. [PMID: 33391028 PMCID: PMC7773599 DOI: 10.3389/fphys.2020.612927] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 11/20/2020] [Indexed: 12/13/2022] Open
Abstract
Defects in protein quality control have been increasingly recognized as pathogenic factors in the development of heart failure, a persistent devastating disease lacking efficacious therapies. Ubiquitin and ubiquitin-like proteins, a family of post-translational modifying polypeptides, play important roles in controlling protein quality by maintaining the stability and functional diversity of the proteome. NEDD8 (neural precursor cell expressed, developmentally downregulated 8), a small ubiquitin-like protein, was discovered two decades ago but until recently the biological significance of NEDD8 modifications (neddylation) in the heart has not been appreciated. In this review, we summarize the current knowledge of the biology of neddylation, highlighting several mechanisms by which neddylation regulates the function of its downstream targets, and discuss the expanding roles for neddylation in cardiac physiology and disease, with an emphasis on cardiac protein quality control. Finally, we outline challenges linked to the study of neddylation in health and disease.
Collapse
Affiliation(s)
- Jie Li
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - Jianqiu Zou
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - Rodney Littlejohn
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - Jinbao Liu
- Protein Modification and Degradation Lab, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, China
| | - Huabo Su
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, United States
| |
Collapse
|
13
|
Alam S, Abdullah CS, Aishwarya R, Morshed M, Nitu SS, Miriyala S, Panchatcharam M, Kevil CG, Orr AW, Bhuiyan MS. Dysfunctional Mitochondrial Dynamic and Oxidative Phosphorylation Precedes Cardiac Dysfunction in R120G-αB-Crystallin-Induced Desmin-Related Cardiomyopathy. J Am Heart Assoc 2020; 9:e017195. [PMID: 33208022 PMCID: PMC7763772 DOI: 10.1161/jaha.120.017195] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 10/05/2020] [Indexed: 02/06/2023]
Abstract
Background The mutated α-B-Crystallin (CryABR120G) mouse model of desmin-related myopathy (DRM) shows an age-dependent onset of pathologic cardiac remodeling and progression of heart failure. CryABR120G expression in cardiomyocytes affects the mitochondrial spatial organization within the myofibrils, but the molecular perturbation within the mitochondria in the relation of the overall course of the proteotoxic disease remains unclear. Methods and Results CryABR120G mice show an accumulation of electron-dense aggregates and myofibrillar degeneration associated with the development of cardiac dysfunction. Though extensive studies demonstrated that these altered ultrastructural changes cause cardiac contractility impairment, the molecular mechanism of cardiomyocyte death remains elusive. Here, we explore early pathological processes within the mitochondria contributing to the contractile dysfunction and determine the pathogenic basis for the heart failure observed in the CryABR120G mice. In the present study, we report that the CryABR120G mice transgenic hearts undergo altered mitochondrial dynamics associated with increased level of dynamin-related protein 1 and decreased level of optic atrophy type 1 as well as mitofusin 1 over the disease process. In association with these changes, an altered level of the components of mitochondrial oxidative phosphorylation and pyruvate dehydrogenase complex regulatory proteins occurs before the manifestation of pathologic adverse remodeling in the CryABR120G hearts. Mitochondria isolated from CryABR120G transgenic hearts without visible pathology show decreased electron transport chain complex activities and mitochondrial respiration. Taken together, we demonstrated the involvement of mitochondria in the pathologic remodeling and progression of DRM-associated cellular dysfunction. Conclusions Mitochondrial dysfunction in the form of altered mitochondrial dynamics, oxidative phosphorylation and pyruvate dehydrogenase complex proteins level, abnormal electron transport chain complex activities, and mitochondrial respiration are evident on the CryABR120G hearts before the onset of detectable pathologies and development of cardiac contractile dysfunction.
Collapse
Affiliation(s)
- Shafiul Alam
- Department of Pathology and Translational PathobiologyLouisiana State University Health Sciences CenterShreveportLA
| | - Chowdhury S. Abdullah
- Department of Pathology and Translational PathobiologyLouisiana State University Health Sciences CenterShreveportLA
| | - Richa Aishwarya
- Department of Molecular and Cellular PhysiologyLouisiana State University Health Sciences CenterShreveportLA
| | - Mahboob Morshed
- Department of Pathology and Translational PathobiologyLouisiana State University Health Sciences CenterShreveportLA
| | - Sadia S. Nitu
- Department of Pathology and Translational PathobiologyLouisiana State University Health Sciences CenterShreveportLA
| | - Sumitra Miriyala
- Department of Cellular Biology and AnatomyLouisiana State University Health Sciences CenterShreveportLA
| | - Manikandan Panchatcharam
- Department of Cellular Biology and AnatomyLouisiana State University Health Sciences CenterShreveportLA
| | - Christopher G. Kevil
- Department of Pathology and Translational PathobiologyLouisiana State University Health Sciences CenterShreveportLA
- Department of Molecular and Cellular PhysiologyLouisiana State University Health Sciences CenterShreveportLA
- Department of Cellular Biology and AnatomyLouisiana State University Health Sciences CenterShreveportLA
| | - A. Wayne Orr
- Department of Pathology and Translational PathobiologyLouisiana State University Health Sciences CenterShreveportLA
- Department of Molecular and Cellular PhysiologyLouisiana State University Health Sciences CenterShreveportLA
- Department of Cellular Biology and AnatomyLouisiana State University Health Sciences CenterShreveportLA
| | - Md. Shenuarin Bhuiyan
- Department of Pathology and Translational PathobiologyLouisiana State University Health Sciences CenterShreveportLA
- Department of Molecular and Cellular PhysiologyLouisiana State University Health Sciences CenterShreveportLA
| |
Collapse
|
14
|
Mishra S, Dunkerly-Eyring BL, Keceli G, Ranek MJ. Phosphorylation Modifications Regulating Cardiac Protein Quality Control Mechanisms. Front Physiol 2020; 11:593585. [PMID: 33281625 PMCID: PMC7689282 DOI: 10.3389/fphys.2020.593585] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 09/28/2020] [Indexed: 12/12/2022] Open
Abstract
Many forms of cardiac disease, including heart failure, present with inadequate protein quality control (PQC). Pathological conditions often involve impaired removal of terminally misfolded proteins. This results in the formation of large protein aggregates, which further reduce cellular viability and cardiac function. Cardiomyocytes have an intricately collaborative PQC system to minimize cellular proteotoxicity. Increased expression of chaperones or enhanced clearance of misfolded proteins either by the proteasome or lysosome has been demonstrated to attenuate disease pathogenesis, whereas reduced PQC exacerbates pathogenesis. Recent studies have revealed that phosphorylation of key proteins has a potent regulatory role, both promoting and hindering the PQC machinery. This review highlights the recent advances in phosphorylations regulating PQC, the impact in cardiac pathology, and the therapeutic opportunities presented by harnessing these modifications.
Collapse
Affiliation(s)
- Sumita Mishra
- Division of Cardiology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Brittany L Dunkerly-Eyring
- Department of Pharmacology and Molecular Sciences, Johns Hopkins University, Baltimore, MD, United States
| | - Gizem Keceli
- Division of Cardiology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Mark J Ranek
- Division of Cardiology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, United States
| |
Collapse
|
15
|
Under construction: The dynamic assembly, maintenance, and degradation of the cardiac sarcomere. J Mol Cell Cardiol 2020; 148:89-102. [PMID: 32920010 DOI: 10.1016/j.yjmcc.2020.08.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 08/20/2020] [Accepted: 08/22/2020] [Indexed: 12/11/2022]
Abstract
The sarcomere is the basic contractile unit of striated muscle and is a highly ordered protein complex with the actin and myosin filaments at its core. Assembling the sarcomere constituents into this organized structure in development, and with muscle growth as new sarcomeres are built, is a complex process coordinated by numerous factors. Once assembled, the sarcomere requires constant maintenance as its continuous contraction is accompanied by elevated mechanical, thermal, and oxidative stress, which predispose proteins to misfolding and toxic aggregation. To prevent protein misfolding and maintain sarcomere integrity, the sarcomere is monitored by an assortment of protein quality control (PQC) mechanisms. The need for effective PQC is heightened in cardiomyocytes which are terminally differentiated and must survive for many years while preserving optimal mechanical output. To prevent toxic protein aggregation, molecular chaperones stabilize denatured sarcomere proteins and promote their refolding. However, when old and misfolded proteins cannot be salvaged by chaperones, they must be recycled via degradation pathways: the calpain and ubiquitin-proteasome systems, which operate under basal conditions, and the stress-responsive autophagy-lysosome pathway. Mutations to and deficiency of the molecular chaperones and associated factors charged with sarcomere maintenance commonly lead to sarcomere structural disarray and the progression of heart disease, highlighting the necessity of effective sarcomere PQC for maintaining cardiac function. This review focuses on the dynamic regulation of assembly and turnover at the sarcomere with an emphasis on the chaperones involved in these processes and describes the alterations to chaperones - through mutations and deficient expression - implicated in disease progression to heart failure.
Collapse
|
16
|
Jacko D, Bersiner K, Schulz O, Przyklenk A, Spahiu F, Höhfeld J, Bloch W, Gehlert S. Coordinated alpha-crystallin B phosphorylation and desmin expression indicate adaptation and deadaptation to resistance exercise-induced loading in human skeletal muscle. Am J Physiol Cell Physiol 2020; 319:C300-C312. [PMID: 32520607 DOI: 10.1152/ajpcell.00087.2020] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Skeletal muscle is a target of contraction-induced loading (CiL), leading to protein unfolding or cellular perturbations, respectively. While cytoskeletal desmin is responsible for ongoing structural stabilization, in the immediate response to CiL, alpha-crystallin B (CRYAB) is phosphorylated at serine 59 (pCRYABS59) by P38, acutely protecting the cytoskeleton. To reveal adaptation and deadaptation of these myofibrillar subsystems to CiL, we examined CRYAB, P38, and desmin regulation following resistance exercise at diverse time points of a chronic training period. Mechanosensitive JNK phosphorylation (pJNKT183/Y185) was determined to indicate the presence of mechanical components in CiL. Within 6 wk, subjects performed 13 resistance exercise bouts at the 8-12 repetition maximum, followed by 10 days detraining and a final 14th bout. Biopsies were taken at baseline and after the 1st, 3rd, 7th, 10th, 13th, and 14th bout. To assess whether potential desensitization to CiL can be mitigated, one group trained with progressive and a second with constant loading. As no group differences were found, all subjects were combined for statistics. Total and phosphorylated P38 was not regulated over the time course. pCRYABS59 and pJNKT183/Y185 strongly increased following the unaccustomed first bout. This exercise-induced pCRYABS59/pJNKT183/Y185 increase disappeared with the 10th until 13th bout. As response to the detraining period, the 14th bout led to a renewed increase in pCRYABS59. Desmin content followed pCRYABS59 inversely, i.e., was up- when pCRYABS59 was downregulated and vice versa. In conclusion, the pCRYABS59 response indicates increase and decrease in resistance to CiL, in which a reinforced desmin network could play an essential role by structurally stabilizing the cells.
Collapse
Affiliation(s)
- Daniel Jacko
- Department for Molecular and Cellular Sports Medicine, Institute for Cardiovascular Research and Sports Medicine, German Sport University Cologne, Cologne, Germany.,Olympic Base Center, North Rhine-Westphalia/Rhineland, Cologne, Germany
| | - Käthe Bersiner
- Department for Biosciences of Sports, Institute for Sports Sciences, University of Hildesheim, Hildesheim, Germany
| | - Oliver Schulz
- Department for Molecular and Cellular Sports Medicine, Institute for Cardiovascular Research and Sports Medicine, German Sport University Cologne, Cologne, Germany
| | - Axel Przyklenk
- Department for Molecular and Cellular Sports Medicine, Institute for Cardiovascular Research and Sports Medicine, German Sport University Cologne, Cologne, Germany
| | - Fabian Spahiu
- Department for Molecular and Cellular Sports Medicine, Institute for Cardiovascular Research and Sports Medicine, German Sport University Cologne, Cologne, Germany
| | - Jörg Höhfeld
- Institute for Cell Biology, University of Bonn, Bonn, Germany
| | - Wilhelm Bloch
- Department for Molecular and Cellular Sports Medicine, Institute for Cardiovascular Research and Sports Medicine, German Sport University Cologne, Cologne, Germany
| | - Sebastian Gehlert
- Department for Molecular and Cellular Sports Medicine, Institute for Cardiovascular Research and Sports Medicine, German Sport University Cologne, Cologne, Germany.,Department for Biosciences of Sports, Institute for Sports Sciences, University of Hildesheim, Hildesheim, Germany
| |
Collapse
|
17
|
Singh SR, Kadioglu H, Patel K, Carrier L, Agnetti G. Is Desmin Propensity to Aggregate Part of its Protective Function? Cells 2020; 9:cells9020491. [PMID: 32093415 PMCID: PMC7072738 DOI: 10.3390/cells9020491] [Citation(s) in RCA: 9] [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: 01/31/2020] [Accepted: 02/17/2020] [Indexed: 12/19/2022] Open
Abstract
Desmin is the major protein component of the intermediate filaments (IFs) cytoskeleton in muscle cells, including cardiac. The accumulation of cleaved and misfolded desmin is a cellular hallmark of heart failure (HF). These desmin alterations are reversed by therapy, suggesting a causal role for the IFs in the development of HF. Though IFs are known to play a role in the protection from stress, a mechanistic model of how that occurs is currently lacking. On the other hand, the heart is uniquely suited to study the function of the IFs, due to its inherent, cyclic contraction. That is, HF can be used as a model to address how IFs afford protection from mechanical, and possibly redox, stress. In this review we provide a brief summary of the current views on the function of the IFs, focusing on desmin. We also propose a new model according to which the propensity of desmin to aggregate may have been selected during evolution as a way to dissipate excessive mechanical and possibly redox stress. According to this model, though desmin misfolding may afford protection from acute injury, the sustained or excessive accumulation of desmin aggregates could impair proteostasis and contribute to disease.
Collapse
Affiliation(s)
- Sonia R. Singh
- Institute of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (S.R.S.); (L.C.)
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, 20246 Hamburg, Germany
| | - Hikmet Kadioglu
- Center for Research on Cardiac Intermediate Filaments, Johns Hopkins University, Baltimore, MD 21205, USA; (H.K.); (K.P.)
| | - Krishna Patel
- Center for Research on Cardiac Intermediate Filaments, Johns Hopkins University, Baltimore, MD 21205, USA; (H.K.); (K.P.)
| | - Lucie Carrier
- Institute of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (S.R.S.); (L.C.)
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, 20246 Hamburg, Germany
| | - Giulio Agnetti
- Center for Research on Cardiac Intermediate Filaments, Johns Hopkins University, Baltimore, MD 21205, USA; (H.K.); (K.P.)
- DIBINEM, University of Bologna, 40126 Bologna, Italy
- Correspondence:
| |
Collapse
|
18
|
Neuromuscular Diseases Due to Chaperone Mutations: A Review and Some New Results. Int J Mol Sci 2020; 21:ijms21041409. [PMID: 32093037 PMCID: PMC7073051 DOI: 10.3390/ijms21041409] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 02/12/2020] [Accepted: 02/13/2020] [Indexed: 12/12/2022] Open
Abstract
Skeletal muscle and the nervous system depend on efficient protein quality control, and they express chaperones and cochaperones at high levels to maintain protein homeostasis. Mutations in many of these proteins cause neuromuscular diseases, myopathies, and hereditary motor and sensorimotor neuropathies. In this review, we cover mutations in DNAJB6, DNAJB2, αB-crystallin (CRYAB, HSPB5), HSPB1, HSPB3, HSPB8, and BAG3, and discuss the molecular mechanisms by which they cause neuromuscular disease. In addition, previously unpublished results are presented, showing downstream effects of BAG3 p.P209L on DNAJB6 turnover and localization.
Collapse
|
19
|
Lambert M, Claeyssen C, Bastide B, Cieniewski‐Bernard C. O-GlcNAcylation as a regulator of the functional and structural properties of the sarcomere in skeletal muscle: An update review. Acta Physiol (Oxf) 2020; 228:e13301. [PMID: 31108020 DOI: 10.1111/apha.13301] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 05/03/2019] [Accepted: 05/10/2019] [Indexed: 12/15/2022]
Abstract
Although the O-GlcNAcylation process was discovered in 1984, its potential role in the physiology and physiopathology of skeletal muscle only emerged 20 years later. An increasing number of publications strongly support a key role of O-GlcNAcylation in the modulation of important cellular processes which are essential for skeletal muscle functions. Indeed, over a thousand of O-GlcNAcylated proteins have been identified within skeletal muscle since 2004, which belong to various classes of proteins, including sarcomeric proteins. In this review, we focused on these myofibrillar proteins, including contractile and structural proteins. Because of the modification of motor and regulatory proteins, the regulatory myosin light chain (MLC2) is related to several reports that support a key role of O-GlcNAcylation in the fine modulation of calcium activation parameters of skeletal muscle fibres, depending on muscle phenotype and muscle work. In addition, another key function of O-GlcNAcylation has recently emerged in the regulation of organization and reorganization of the sarcomere. Altogether, this data support a key role of O-GlcNAcylation in the homeostasis of sarcomeric cytoskeleton, known to be disturbed in many related muscle disorders.
Collapse
Affiliation(s)
- Matthias Lambert
- Univ. Lille, EA 7369 ‐ URePSSS ‐ Unité de Recherche Pluridisciplinaire Sport Santé Société Lille France
| | - Charlotte Claeyssen
- Univ. Lille, EA 7369 ‐ URePSSS ‐ Unité de Recherche Pluridisciplinaire Sport Santé Société Lille France
| | - Bruno Bastide
- Univ. Lille, EA 7369 ‐ URePSSS ‐ Unité de Recherche Pluridisciplinaire Sport Santé Société Lille France
| | | |
Collapse
|
20
|
Ghahramani M, Yousefi R, Krivandin A, Muranov K, Kurganov B, Moosavi-Movahedi AA. Structural and functional characterization of D109H and R69C mutant versions of human αB-crystallin: The biochemical pathomechanism underlying cataract and myopathy development. Int J Biol Macromol 2019; 146:1142-1160. [PMID: 31678106 DOI: 10.1016/j.ijbiomac.2019.09.239] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 09/18/2019] [Accepted: 09/20/2019] [Indexed: 12/15/2022]
Abstract
In human αB-crystallin (αB-Cry), the highly conserved residues arginine 69 (R69) and aspartate 109 (D109) are located within a critical motif of α-crystallin domain (ACD), contributing to the subunit interactions and oligomeric assembly. Recently, two missense mutations (R69C and D109H) in human αB-Cry have been reported to cause congenital cataract and myopathy disorders. We used various spectroscopic techniques, dynamic light scattering (DLS), small-angle X-ray scattering (SAXS), gel electrophoresis and transmission electron microscopy (TEM) to show how these mutations cause significant changes in structure, amyloidogenic feature and biological function of human αB-Cry. These pathogenic mutations resulted in the important alterations of the secondary, tertiary and oligomeric (quaternary) structures of human αB-Cry. The missense mutations were also capable to significantly increase the amyloidogenic propensity of human αB-Cry and to diminish the chaperone-like activity of this protein. The above mentioned changes were observed more noticeably after D109H mutation. The detrimental effects of D109H mutation may be due to the loss of salt bridge with R120 in the dimeric interface, flagging the anti-aggregation ability of αB-Cry chaperone. In conclusion, the R69C and D109H mutations displayed a significant damaging effect on the structure and chaperone function of human αB-Cry which could be considered as their biochemical pathomechanisms in development of congenital cataract and myopathy disorders.
Collapse
Affiliation(s)
- Maryam Ghahramani
- Protein Chemistry Laboratory (PCL), Department of Biology, College of Sciences, Shiraz University, Shiraz, Iran
| | - Reza Yousefi
- Protein Chemistry Laboratory (PCL), Department of Biology, College of Sciences, Shiraz University, Shiraz, Iran.
| | - Alexey Krivandin
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Kosygin str. 4, Moscow 119991, Russia
| | - Konstantin Muranov
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Kosygin str. 4, Moscow 119991, Russia
| | - Boris Kurganov
- Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, 33, bld. 2 Leninsky Ave., Moscow 119071, Russia
| | | |
Collapse
|
21
|
Galata Z, Kloukina I, Kostavasili I, Varela A, Davos CH, Makridakis M, Bonne G, Capetanaki Y. Amelioration of desmin network defects by αB-crystallin overexpression confers cardioprotection in a mouse model of dilated cardiomyopathy caused by LMNA gene mutation. J Mol Cell Cardiol 2018; 125:73-86. [PMID: 30342008 DOI: 10.1016/j.yjmcc.2018.10.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 10/02/2018] [Accepted: 10/16/2018] [Indexed: 10/28/2022]
Abstract
The link between the cytoplasmic desmin intermediate filaments and those of nuclear lamins serves as a major integrator point for the intracellular communication between the nucleus and the cytoplasm in cardiac muscle. We investigated the involvement of desmin in the cardiomyopathy caused by the lamin A/C gene mutation using the LmnaH222P/H222P mouse model of the disease. We demonstrate that in these mouse hearts desmin loses its normal Z disk and intercalated disc localization and presents aggregate formation along with mislocalization of basic intercalated disc protein components, as well as severe structural abnormalities of the intercalated discs and mitochondria. To address the extent by which the observed desmin network defects contribute to the progression of LmnaH222P/H222P cardiomyopathy, we investigated the consequences of desmin-targeted approaches for the disease treatment. We showed that cardiac-specific overexpression of the small heat shock protein αΒ-Crystallin confers cardioprotection in LmnaH222P/H222P mice by ameliorating desmin network defects and by attenuating the desmin-dependent mislocalization of basic intercalated disc protein components. In addition, αΒ-Crystallin overexpression rescues the intercalated disc, mitochondrial and nuclear defects of LmnaH222P/H222P hearts, as well as the abnormal activation of ERK1/2. Consistent with that, by generating the LmnaH222P/H222PDes+/- mice, we showed that the genetically decreased endogenous desmin levels have cardioprotective effects in LmnaH222P/H222P hearts since less desmin is available to form dysfunctional aggregates. In conclusion, our results demonstrate that desmin network disruption, disorganization of intercalated discs and mitochondrial defects are a major mechanism contributing to the progression of this LMNA cardiomyopathy and can be ameliorated by αΒ-Crystallin overexpression.
Collapse
Affiliation(s)
- Zoi Galata
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Ismini Kloukina
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Ioanna Kostavasili
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Aimilia Varela
- Center of Clinical, Experimental Surgery & Translational Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Constantinos H Davos
- Center of Clinical, Experimental Surgery & Translational Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Manousos Makridakis
- Center of Systems Biology, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Gisѐle Bonne
- Sorbonne Université, INSERM UMRS-974, Center for Research in Myology, Institut de Myologie, G.H. Pitié Salpêtrière, F-75651 Paris Cedex 13, France
| | - Yassemi Capetanaki
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece.
| |
Collapse
|
22
|
Winter L, Unger A, Berwanger C, Spörrer M, Türk M, Chevessier F, Strucksberg KH, Schlötzer-Schrehardt U, Wittig I, Goldmann WH, Marcus K, Linke WA, Clemen CS, Schröder R. Imbalances in protein homeostasis caused by mutant desmin. Neuropathol Appl Neurobiol 2018; 45:476-494. [PMID: 30179276 DOI: 10.1111/nan.12516] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 08/17/2018] [Indexed: 12/19/2022]
Abstract
AIMS We investigated newly generated immortalized heterozygous and homozygous R349P desmin knock-in myoblasts in conjunction with the corresponding desminopathy mice as models for desminopathies to analyse major protein quality control processes in response to the presence of R349P mutant desmin. METHODS We used hetero- and homozygous R349P desmin knock-in mice for analyses and for crossbreeding with p53 knock-out mice to generate immortalized R349P desmin knock-in skeletal muscle myoblasts and myotubes. Skeletal muscle sections and cultured muscle cells were investigated by indirect immunofluorescence microscopy, proteasomal activity measurements and immunoblotting addressing autophagy rate, chaperone-assisted selective autophagy and heat shock protein levels. Muscle sections were further analysed by transmission and immunogold electron microscopy. RESULTS We demonstrate that mutant desmin (i) increases proteasomal activity, (ii) stimulates macroautophagy, (iii) dysregulates the chaperone assisted selective autophagy and (iv) elevates the protein levels of αB-crystallin and Hsp27. Both αB-crystallin and Hsp27 as well as Hsp90 displayed translocation patterns from Z-discs as well as Z-I junctions, respectively, to the level of sarcomeric I-bands in dominant and recessive desminopathies. CONCLUSIONS Our findings demonstrate that the presence of R349P mutant desmin causes a general imbalance in skeletal muscle protein homeostasis via aberrant activity of all major protein quality control systems. The augmented activity of these systems and the subcellular shift of essential heat shock proteins may deleteriously contribute to the previously observed increased turnover of desmin itself and desmin-binding partners, which triggers progressive dysfunction of the extrasarcomeric cytoskeleton and the myofibrillar apparatus in the course of the development of desminopathies.
Collapse
Affiliation(s)
- L Winter
- Institute of Neuropathology, University Hospital Erlangen, Erlangen, Germany.,Neuromuscular Research Department, Center for Anatomy and Cell Biology, Medical University of Vienna, Vienna, Austria
| | - A Unger
- Department of Cardiovascular Physiology, Ruhr-University Bochum, Bochum, Germany.,Institute for Genetics of Heart Diseases, University Hospital Münster, Münster, Germany
| | - C Berwanger
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany.,Center for Biochemistry, Institute of Biochemistry I, Medical Faculty, University of Cologne, Cologne, Germany
| | - M Spörrer
- Center for Medical Physics and Technology, Biophysics Group, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - M Türk
- Department of Neurology, University Hospital Erlangen, Erlangen, Germany
| | - F Chevessier
- Institute of Neuropathology, University Hospital Erlangen, Erlangen, Germany
| | - K-H Strucksberg
- Center for Biochemistry, Institute of Biochemistry I, Medical Faculty, University of Cologne, Cologne, Germany
| | | | - I Wittig
- Functional Proteomics, SFB815 Core Unit, Medical School, Goethe University, Frankfurt, Germany
| | - W H Goldmann
- Center for Medical Physics and Technology, Biophysics Group, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - K Marcus
- Medizinisches Proteom-Center, Medical Faculty, Ruhr-University Bochum, Bochum, Germany
| | - W A Linke
- Department of Cardiovascular Physiology, Ruhr-University Bochum, Bochum, Germany.,Institute of Physiology II, University of Münster, Münster, Germany
| | - C S Clemen
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany.,Center for Biochemistry, Institute of Biochemistry I, Medical Faculty, University of Cologne, Cologne, Germany
| | - R Schröder
- Institute of Neuropathology, University Hospital Erlangen, Erlangen, Germany
| |
Collapse
|
23
|
Penna C, Sorge M, Femminò S, Pagliaro P, Brancaccio M. Redox Aspects of Chaperones in Cardiac Function. Front Physiol 2018; 9:216. [PMID: 29615920 PMCID: PMC5864891 DOI: 10.3389/fphys.2018.00216] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 02/26/2018] [Indexed: 12/14/2022] Open
Abstract
Molecular chaperones are stress proteins that allow the correct folding or unfolding as well as the assembly or disassembly of macromolecular cellular components. Changes in expression and post-translational modifications of chaperones have been linked to a number of age- and stress-related diseases including cancer, neurodegeneration, and cardiovascular diseases. Redox sensible post-translational modifications, such as S-nitrosylation, glutathionylation and phosphorylation of chaperone proteins have been reported. Redox-dependent regulation of chaperones is likely to be a phenomenon involved in metabolic processes and may represent an adaptive response to several stress conditions, especially within mitochondria, where it impacts cellular bioenergetics. These post-translational modifications might underlie the mechanisms leading to cardioprotection by conditioning maneuvers as well as to ischemia/reperfusion injury. In this review, we discuss this topic and focus on two important aspects of redox-regulated chaperones, namely redox regulation of mitochondrial chaperone function and cardiac protection against ischemia/reperfusion injury.
Collapse
Affiliation(s)
- Claudia Penna
- Department of Clinical and Biological Sciences, University of Torino, Torino, Italy
| | - Matteo Sorge
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Torino, Italy
| | - Saveria Femminò
- Department of Clinical and Biological Sciences, University of Torino, Torino, Italy
| | - Pasquale Pagliaro
- Department of Clinical and Biological Sciences, University of Torino, Torino, Italy
| | - Mara Brancaccio
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Torino, Italy
| |
Collapse
|
24
|
The MTM1-UBQLN2-HSP complex mediates degradation of misfolded intermediate filaments in skeletal muscle. Nat Cell Biol 2018; 20:198-210. [PMID: 29358706 DOI: 10.1038/s41556-017-0024-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Accepted: 12/06/2017] [Indexed: 12/14/2022]
Abstract
The ubiquitin proteasome system and autophagy are major protein turnover mechanisms in muscle cells, which ensure stemness and muscle fibre maintenance. Muscle cells contain a high proportion of cytoskeletal proteins, which are prone to misfolding and aggregation; pathological processes that are observed in several neuromuscular diseases called proteinopathies. Despite advances in deciphering the mechanisms underlying misfolding and aggregation, little is known about how muscle cells manage cytoskeletal degradation. Here, we describe a process by which muscle cells degrade the misfolded intermediate filament proteins desmin and vimentin by the proteasome. This relies on the MTM1-UBQLN2 complex to recognize and guide these misfolded proteins to the proteasome and occurs prior to aggregate formation. Thus, our data highlight a safeguarding function of the MTM1-UBQLN2 complex that ensures cytoskeletal integrity to avoid proteotoxic aggregate formation.
Collapse
|
25
|
Panda S, Kar A, Biswas S. Preventive effect of Agnucastoside C against Isoproterenol-induced myocardial injury. Sci Rep 2017; 7:16146. [PMID: 29170391 PMCID: PMC5701045 DOI: 10.1038/s41598-017-16075-0] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 10/23/2017] [Indexed: 12/22/2022] Open
Abstract
An iridoid glycoside, agnucastoside C (ACC) was isolated from the leaves of Moringa oliefera and its cardio protective potential was investigated in adult rats by examining the effects of this test compound, ACC at 30 mg/kg for 14 days in isoproterenol (100 mg/kg)-induced myocardial injury. Isoproterenol (ISO) administration induced the myocardial injury as evidenced by the altered ECG pattern with ST-segment elevation and an increase in the levels of cardiac injury markers including troponin-I, creatine kinase-MB, alanine transaminase, aspartate transaminase, lactate dehydrogenase; inflammatory markers, interleukine-6 and tumor necrosis factor. In this group, there was also an increase in cardiac lipid peroxidation and a decrease in cellular antioxidants. However, pretreatment with ACC maintained the normal ECG pattern and nearly normal levels of all the cardiac markers in ISO-induced animals. Electron microscopic and histological studies also showed marked reduction in ISO-induced cardiac damages including infarct size by ACC. Analysis by 2-DE revealed the involvement of 19 different cardiac proteins, associated with energy metabolism, oxidative stress and maintenance of cytoskeleton. The expression of those proteins were altered by ISO, but maintained in ACC pretreated rats. Our findings reveal the potential of isolated ACC in the prevention of myocardial damage.
Collapse
Affiliation(s)
- Sunanda Panda
- School of Life Sciences, Takshashila Campus, Devi Ahilya University, Indore, India
| | - Anand Kar
- School of Life Sciences, Takshashila Campus, Devi Ahilya University, Indore, India.
| | - Sagarika Biswas
- Department of Genomics & Molecular Medicine, CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
| |
Collapse
|
26
|
Unger A, Beckendorf L, Böhme P, Kley R, von Frieling-Salewsky M, Lochmüller H, Schröder R, Fürst DO, Vorgerd M, Linke WA. Translocation of molecular chaperones to the titin springs is common in skeletal myopathy patients and affects sarcomere function. Acta Neuropathol Commun 2017; 5:72. [PMID: 28915917 PMCID: PMC5603016 DOI: 10.1186/s40478-017-0474-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Accepted: 09/09/2017] [Indexed: 12/16/2022] Open
Abstract
Myopathies encompass a wide variety of acquired and hereditary disorders. The pathomechanisms include structural and functional changes affecting, e.g., myofiber metabolism and contractile properties. In this study, we observed increased passive tension (PT) of skinned myofibers from patients with myofibrillar myopathy (MFM) caused by FLNC mutations (MFM-filaminopathy) and limb-girdle muscular dystrophy type-2A due to CAPN3 mutations (LGMD2A), compared to healthy control myofibers. Because the giant protein titin determines myofiber PT, we measured its molecular size and the titin-to-myosin ratio, but found no differences between myopathies and controls. All-titin phosphorylation and site-specific phosphorylation in the PEVK region were reduced in myopathy, which would be predicted to lower PT. Electron microscopy revealed extensive ultrastructural changes in myofibers of various hereditary myopathies and also suggested massive binding of proteins to the sarcomeric I-band region, presumably heat shock proteins (HSPs), which can translocate to elastic titin under stress conditions. Correlative immunofluorescence and immunoelectron microscopy showed that two small HSPs (HSP27 and αB-crystallin) and the ATP-dependent chaperone HSP90 translocated to the titin springs in myopathy. The small HSPs, but not HSP90, were upregulated in myopathic versus control muscles. The titin-binding pattern of chaperones was regularly observed in Duchenne muscular dystrophy (DMD), LGMD2A, MFM-filaminopathy, MFM-myotilinopathy, titinopathy, and inclusion body myopathy due to mutations in valosin-containing protein, but not in acquired sporadic inclusion body myositis. The three HSPs also associated with elastic titin in mouse models of DMD and MFM-filaminopathy. Mechanical measurements on skinned human myofibers incubated with exogenous small HSPs suggested that the elevated PT seen in myopathy is caused, in part, by chaperone-binding to the titin springs. Whereas this interaction may be protective in that it prevents sarcomeric protein aggregation, it also has detrimental effects on sarcomere function. Thus, we identified a novel pathological phenomenon common to many hereditary muscle disorders, which involves sarcomeric alterations.
Collapse
|
27
|
Fung G, Wong J, Berhe F, Mohamud Y, Xue YC, Luo H. Phosphorylation and degradation of αB-crystallin during enterovirus infection facilitates viral replication and induces viral pathogenesis. Oncotarget 2017; 8:74767-74780. [PMID: 29088822 PMCID: PMC5650377 DOI: 10.18632/oncotarget.20366] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 07/25/2017] [Indexed: 01/25/2023] Open
Abstract
Protein quality control (PQC) plays a key role in maintaining cardiomyocyte function and homeostasis, and malfunction in PQC is implicated in various forms of heart diseases. Molecular chaperones serve as the primary checkpoint for PQC; however, their roles in the pathogenesis of viral myocarditis, an inflammation of the myocardium caused by viral infection, are largely unknown. AlphaB-crystallin (CryAB) is the most abundant chaperone protein in the heart. It interacts with desmin and cytoplasmic actin to prevent protein misfolding and aggregation and to help maintain cytoskeletal integrity and cardiac function. Here we showed that coxsackievirus infection induced desminopathy-like phenotype of the myocardium, as characterized by the accumulation of protein aggregates and the disruption of desmin organization. We further demonstrated that CryAB was phosphorylated during early and downregulated at later stages of infection. Moreover, we showed that phosphorylated CryAB had a shorter half-life and was targeted to the ubiquitin-proteasome system for degradation. Lastly, we found that overexpression of CryAB significantly attenuated viral protein production and progeny release, indicating an anti-viral function for CryAB. Together, our results suggest a mechanism by which coxsackieviral infection induces CryAB degradation and loss-of-function, resulting in desmin aggregation, ultimately contributing to compromised cytoskeletal integrity and viral cardiomyopathy.
Collapse
Affiliation(s)
- Gabriel Fung
- Centre for Heart Lung Innovation, St. Paul's Hospital and Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Jerry Wong
- Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology and Pathology, School of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Feaven Berhe
- Centre for Heart Lung Innovation, St. Paul's Hospital and Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Yasir Mohamud
- Centre for Heart Lung Innovation, St. Paul's Hospital and Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Yuan Chao Xue
- Centre for Heart Lung Innovation, St. Paul's Hospital and Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Honglin Luo
- Centre for Heart Lung Innovation, St. Paul's Hospital and Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada
| |
Collapse
|
28
|
Pleasant L, Ma Q, Devarajan M, Parameswaran P, Drake K, Siroky B, Shay-Winkler K, Robbins J, Devarajan P. Increased susceptibility to structural acute kidney injury in a mouse model of presymptomatic cardiomyopathy. Am J Physiol Renal Physiol 2017; 313:F699-F705. [PMID: 28679593 DOI: 10.1152/ajprenal.00505.2016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 06/27/2017] [Accepted: 06/27/2017] [Indexed: 01/03/2023] Open
Abstract
The early events that signal renal dysfunction in presymptomatic heart failure are unclear. We tested the hypothesis that functional and mechanistic changes occur in the kidney that precede the development of symptomatic heart failure. We employed a transgenic mouse model with cardiomyocyte-specific overexpression of mutant α-B-crystallin that develops slowly progressive cardiomyopathy. Presymptomatic transgenic mice displayed an increase in serum creatinine (1.17 ± 0.34 vs. wild type 0.65 ± 0.16 mg/dl, P < 0.05) and in urinary neutrophil gelatinase-associated lipocalin (NGAL; 278.92 ± 176.24 vs. wild type 49.11 ± 22.79 ng/ml, P < 0.05) but no renal fibrosis. Presymptomatic transgenic mouse kidneys exhibited a twofold upregulation of the Ren1 gene, marked overexpression of renin protein in the tubules, and a worsened response to ischemia-reperfusion injury based on serum creatinine (2.77 ± 0.66 in transgenic mice vs. 2.01 ± 0.58 mg/dl in wild type, P < 0.05), urine NGAL (9,198.79 ± 3,799.52 in transgenic mice vs. 3,252.94 ± 2,420.36 ng/ml in wild type, P < 0.05), tubule dilation score (3.4 ± 0.5 in transgenic mice vs. 2.6 ± 0.5 in wild type, P < 0.05), tubule cast score (3.2 ± 0.4 in transgenic mice vs. 2.5 ± 0.5 in wild type, P < 0.05), and TdT-mediated dUTP nick-end labeling (TUNEL)-positive nuclei (10.1 ± 2.1 in the transgenic group vs. 5.7 ± 1.6 per 100 cells counted in wild type, P < 0.01). Our findings indicate functional renal impairment, urinary biomarker elevations, and induction of renin gene and protein expression in the kidney that occur in early presymptomatic heart failure, which increase the susceptibility to subsequent acute kidney injury.
Collapse
Affiliation(s)
- LaTawnya Pleasant
- Nephrology and Hypertension, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio; and
| | - Qing Ma
- Nephrology and Hypertension, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio; and
| | - Mahima Devarajan
- Nephrology and Hypertension, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio; and
| | - Priyanka Parameswaran
- Nephrology and Hypertension, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio; and
| | - Keri Drake
- Nephrology and Hypertension, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio; and
| | - Brian Siroky
- Nephrology and Hypertension, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio; and
| | - Kritton Shay-Winkler
- Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Jeffrey Robbins
- Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Prasad Devarajan
- Nephrology and Hypertension, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio; and
| |
Collapse
|
29
|
Abstract
The incidence and prevalence of cardiac diseases, which are the main cause of death worldwide, are likely to increase because of population ageing. Prevailing theories about the mechanisms of ageing feature the gradual derailment of cellular protein homeostasis (proteostasis) and loss of protein quality control as central factors. In the heart, loss of protein patency, owing to flaws in genetically-determined design or because of environmentally-induced 'wear and tear', can overwhelm protein quality control, thereby triggering derailment of proteostasis and contributing to cardiac ageing. Failure of protein quality control involves impairment of chaperones, ubiquitin-proteosomal systems, autophagy, and loss of sarcomeric and cytoskeletal proteins, all of which relate to induction of cardiomyocyte senescence. Targeting protein quality control to maintain cardiac proteostasis offers a novel therapeutic strategy to promote cardiac health and combat cardiac disease. Currently marketed drugs are available to explore this concept in the clinical setting.
Collapse
Affiliation(s)
- Robert H Henning
- Department of Clinical Pharmacy and Pharmacology, University Medical Centre Groningen, University of Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| | - Bianca J J M Brundel
- Department of Physiology, Amsterdam Cardiovascular Sciences, VU University Medical Center, De Boelelaan 1117, 1081 HZ Amsterdam, The Netherlands
| |
Collapse
|
30
|
McLendon PM, Davis G, Gulick J, Singh SR, Xu N, Salomonis N, Molkentin JD, Robbins J. An Unbiased High-Throughput Screen to Identify Novel Effectors That Impact on Cardiomyocyte Aggregate Levels. Circ Res 2017; 121:604-616. [PMID: 28655832 DOI: 10.1161/circresaha.117.310945] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 06/23/2017] [Accepted: 06/26/2017] [Indexed: 12/20/2022]
Abstract
RATIONALE Postmitotic cells, such as cardiomyocytes, seem to be particularly susceptible to proteotoxic stimuli, and large, proteinaceous deposits are characteristic of the desmin-related cardiomyopathies and crystallin cardiomyopathic diseases. Increased activity of protein clearance pathways in the cardiomyocyte, such as proteasomal degradation and autophagy, has proven to be beneficial in maintaining cellular and cardiac function in the face of multiple proteotoxic insults, holding open the possibility of targeting these processes for the development of effective therapeutics. OBJECTIVE Here, we undertake an unbiased, total genome screen for RNA transcripts and their protein products that affect aggregate accumulations in the cardiomyocytes. METHODS AND RESULTS Primary mouse cardiomyocytes that accumulate aggregates as a result of a mutant CryAB (αB-crystallin) causative for human desmin-related cardiomyopathy were used for a total genome-wide screen to identify gene products that affected aggregate formation. We infected cardiomyocytes using a short hairpin RNA lentivirus library in which the mouse genome was represented. The screen identified multiple candidates in many cell signaling pathways that were able to mediate significant decreases in aggregate levels. CONCLUSIONS Subsequent validation of one of these candidates, Jak1 (Janus kinase 1), a tyrosine kinase of the nonreceptor type, confirmed the usefulness of this approach in identifying previously unsuspected players in proteotoxic processes.
Collapse
Affiliation(s)
- Patrick M McLendon
- From the Division of Molecular Cardiovascular Biology, Heart Institute, Cincinnati Children's Hospital Medical Center, OH (P.M.M., G.D., J.G., S.R.S., N.X., J.D.M., J.R.); Division of Biomedical Informatics, Cincinnati Children's Hospital, OH (N.S.); and UES, Inc, Dayton, OH (P.M.M.)
| | - Gregory Davis
- From the Division of Molecular Cardiovascular Biology, Heart Institute, Cincinnati Children's Hospital Medical Center, OH (P.M.M., G.D., J.G., S.R.S., N.X., J.D.M., J.R.); Division of Biomedical Informatics, Cincinnati Children's Hospital, OH (N.S.); and UES, Inc, Dayton, OH (P.M.M.)
| | - James Gulick
- From the Division of Molecular Cardiovascular Biology, Heart Institute, Cincinnati Children's Hospital Medical Center, OH (P.M.M., G.D., J.G., S.R.S., N.X., J.D.M., J.R.); Division of Biomedical Informatics, Cincinnati Children's Hospital, OH (N.S.); and UES, Inc, Dayton, OH (P.M.M.)
| | - Sonia R Singh
- From the Division of Molecular Cardiovascular Biology, Heart Institute, Cincinnati Children's Hospital Medical Center, OH (P.M.M., G.D., J.G., S.R.S., N.X., J.D.M., J.R.); Division of Biomedical Informatics, Cincinnati Children's Hospital, OH (N.S.); and UES, Inc, Dayton, OH (P.M.M.)
| | - Na Xu
- From the Division of Molecular Cardiovascular Biology, Heart Institute, Cincinnati Children's Hospital Medical Center, OH (P.M.M., G.D., J.G., S.R.S., N.X., J.D.M., J.R.); Division of Biomedical Informatics, Cincinnati Children's Hospital, OH (N.S.); and UES, Inc, Dayton, OH (P.M.M.)
| | - Nathan Salomonis
- From the Division of Molecular Cardiovascular Biology, Heart Institute, Cincinnati Children's Hospital Medical Center, OH (P.M.M., G.D., J.G., S.R.S., N.X., J.D.M., J.R.); Division of Biomedical Informatics, Cincinnati Children's Hospital, OH (N.S.); and UES, Inc, Dayton, OH (P.M.M.)
| | - Jeffery D Molkentin
- From the Division of Molecular Cardiovascular Biology, Heart Institute, Cincinnati Children's Hospital Medical Center, OH (P.M.M., G.D., J.G., S.R.S., N.X., J.D.M., J.R.); Division of Biomedical Informatics, Cincinnati Children's Hospital, OH (N.S.); and UES, Inc, Dayton, OH (P.M.M.)
| | - Jeffrey Robbins
- From the Division of Molecular Cardiovascular Biology, Heart Institute, Cincinnati Children's Hospital Medical Center, OH (P.M.M., G.D., J.G., S.R.S., N.X., J.D.M., J.R.); Division of Biomedical Informatics, Cincinnati Children's Hospital, OH (N.S.); and UES, Inc, Dayton, OH (P.M.M.).
| |
Collapse
|
31
|
Batonnet-Pichon S, Behin A, Cabet E, Delort F, Vicart P, Lilienbaum A. Myofibrillar Myopathies: New Perspectives from Animal Models to Potential Therapeutic Approaches. J Neuromuscul Dis 2017; 4:1-15. [PMID: 28269794 PMCID: PMC5345645 DOI: 10.3233/jnd-160203] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Myofibrillar myopathies (MFMs) are muscular disorders involving proteins that play a role in the structure, maintenance processes and protein quality control mechanisms closely related to the Z-disc in the muscular fibers. MFMs share common histological characteristics including progressive disorganization of the interfibrillar network and protein aggregation. Currently no treatment is available. In this review, we describe first clinical symptoms associated with mutations of the six genes (DES, CRYAB, MYOT, ZASP, FLNC and BAG3) primary involved in MFM and defining the origin of this pathology. As mechanisms determining the aetiology of the disease remain unclear yet, several research teams have developed animal models from invertebrates to mammalians species. Thus we describe here these different models that often recapitulate human clinical symptoms. Therefore they are very useful for deeper studies to understand early molecular and progressive mechanisms determining the pathology. Finally in the last part, we emphasize on the potential therapeutic approaches for MFM that could be conducted in the future. In conclusion, this review offers a link from patients to future therapy through the use of MFMs animal models.
Collapse
MESH Headings
- Animals
- Disease Models, Animal
- Drosophila
- Humans
- Mice
- Muscle, Skeletal/pathology
- Muscle, Skeletal/physiopathology
- Mutation
- Myopathies, Structural, Congenital/genetics
- Myopathies, Structural, Congenital/pathology
- Myopathies, Structural, Congenital/physiopathology
- Myopathies, Structural, Congenital/therapy
- Oryzias
Collapse
Affiliation(s)
- Sabrina Batonnet-Pichon
- Unité de Biologie Fonctionnelle et Adaptative, Université Paris Diderot, Sorbonne Paris Cité, CNRS, UMR, Paris, France
| | - Anthony Behin
- Centre de Référence de Pathologie Neuromusculaire Paris-Est, groupe hospitalier Pitié-Salpêtrière, institut de Myologie, AP-HP, boulevard de l’Hôpital, Paris cedex 13, France
| | - Eva Cabet
- Unité de Biologie Fonctionnelle et Adaptative, Université Paris Diderot, Sorbonne Paris Cité, CNRS, UMR, Paris, France
| | - Florence Delort
- Unité de Biologie Fonctionnelle et Adaptative, Université Paris Diderot, Sorbonne Paris Cité, CNRS, UMR, Paris, France
| | - Patrick Vicart
- Unité de Biologie Fonctionnelle et Adaptative, Université Paris Diderot, Sorbonne Paris Cité, CNRS, UMR, Paris, France
| | - Alain Lilienbaum
- Unité de Biologie Fonctionnelle et Adaptative, Université Paris Diderot, Sorbonne Paris Cité, CNRS, UMR, Paris, France
| |
Collapse
|
32
|
Abstract
Voltage-gated sodium channels (VGSC) are critical determinants of cellular electrical activity through the control of initiation and propagation of action potential. To ensure this role, these proteins are not consistently delivered to the plasma membrane but undergo drastic quality controls throughout various adaptive processes such as biosynthesis, anterograde and retrograde trafficking, and membrane targeting. In pathological conditions, this quality control could lead to the retention of functional VGSC and is therefore the target of different pharmacological approaches. The present chapter gives an overview of the current understanding of the facets of VGSC life cycle in the context of both cardiac and neuronal cell types.
Collapse
Affiliation(s)
- A Mercier
- Laboratoire de Signalisation et Transports Ioniques Membranaires, Pôle Biologie Santé, Université de Poitiers, CNRS, 1 rue Georges Bonnet, TSA 51106, 86073, Poitiers Cedex 9, France
| | - P Bois
- Laboratoire de Signalisation et Transports Ioniques Membranaires, Pôle Biologie Santé, Université de Poitiers, CNRS, 1 rue Georges Bonnet, TSA 51106, 86073, Poitiers Cedex 9, France
| | - A Chatelier
- Laboratoire de Signalisation et Transports Ioniques Membranaires, Pôle Biologie Santé, Université de Poitiers, CNRS, 1 rue Georges Bonnet, TSA 51106, 86073, Poitiers Cedex 9, France.
| |
Collapse
|
33
|
Cui X, Liu H, Li J, Guo K, Han W, Dong Y, Wan S, Wang X, Jia P, Li S, Ma Y, Zhang J, Mu H, Hu Y. Heat shock factor 4 regulates lens epithelial cell homeostasis by working with lysosome and anti-apoptosis pathways. Int J Biochem Cell Biol 2016; 79:118-127. [DOI: 10.1016/j.biocel.2016.08.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 07/08/2016] [Accepted: 08/27/2016] [Indexed: 01/06/2023]
|
34
|
Diokmetzidou A, Soumaka E, Kloukina I, Tsikitis M, Makridakis M, Varela A, Davos CH, Georgopoulos S, Anesti V, Vlahou A, Capetanaki Y. Desmin and αB-crystallin interplay in the maintenance of mitochondrial homeostasis and cardiomyocyte survival. J Cell Sci 2016; 129:3705-3720. [PMID: 27566162 DOI: 10.1242/jcs.192203] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 08/15/2016] [Indexed: 12/20/2022] Open
Abstract
The association of desmin with the α-crystallin Β-chain (αΒ-crystallin; encoded by CRYAB), and the fact that mutations in either one of them leads to heart failure in humans and mice, suggests a potential compensatory interplay between the two in cardioprotection. To address this hypothesis, we investigated the consequences of αΒ-crystallin overexpression in the desmin-deficient (Des-/-) mouse model, which possesses a combination of the pathologies found in most cardiomyopathies, with mitochondrial defects as a hallmark. We demonstrated that cardiac-specific αΒ-crystallin overexpression ameliorates all these defects and improves cardiac function to almost wild-type levels. Protection by αΒ-crystallin overexpression is linked to maintenance of proper mitochondrial protein levels, inhibition of abnormal mitochondrial permeability transition pore activation and maintenance of mitochondrial membrane potential (Δψm). Furthermore, we found that both desmin and αΒ-crystallin are localized at sarcoplasmic reticulum (SR)-mitochondria-associated membranes (MAMs), where they interact with VDAC, Mic60 - the core component of mitochondrial contact site and cristae organizing system (MICOS) complex - and ATP synthase, suggesting that these associations could be crucial in mitoprotection at different levels.
Collapse
Affiliation(s)
- Antigoni Diokmetzidou
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Elisavet Soumaka
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Ismini Kloukina
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Mary Tsikitis
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Manousos Makridakis
- Center of Systems Biology, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Aimilia Varela
- Center of Clinical, Experimental Surgery & Translational Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Constantinos H Davos
- Center of Clinical, Experimental Surgery & Translational Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Spiros Georgopoulos
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Vasiliki Anesti
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Antonia Vlahou
- Center of Systems Biology, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Yassemi Capetanaki
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| |
Collapse
|
35
|
Quintana MT, Parry TL, He J, Yates CC, Sidorova TN, Murray KT, Bain JR, Newgard CB, Muehlbauer MJ, Eaton SC, Hishiya A, Takayama S, Willis MS. Cardiomyocyte-Specific Human Bcl2-Associated Anthanogene 3 P209L Expression Induces Mitochondrial Fragmentation, Bcl2-Associated Anthanogene 3 Haploinsufficiency, and Activates p38 Signaling. THE AMERICAN JOURNAL OF PATHOLOGY 2016; 186:1989-2007. [PMID: 27321750 DOI: 10.1016/j.ajpath.2016.03.017] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Revised: 02/20/2016] [Accepted: 03/17/2016] [Indexed: 12/24/2022]
Abstract
The Bcl2-associated anthanogene (BAG) 3 protein is a member of the BAG family of cochaperones, which supports multiple critical cellular processes, including critical structural roles supporting desmin and interactions with heat shock proteins and ubiquitin ligases intimately involved in protein quality control. The missense mutation P209L in exon 3 results in a primarily cardiac phenotype leading to skeletal muscle and cardiac complications. At least 10 other Bag3 mutations have been reported, nine resulting in a dilated cardiomyopathy for which no specific therapy is available. We generated αMHC-human Bag3 P209L transgenic mice and characterized the progressive cardiac phenotype in vivo to investigate its utility in modeling human disease, understand the underlying molecular mechanisms, and identify potential therapeutic targets. We identified a progressive heart failure by echocardiography and Doppler analysis and the presence of pre-amyloid oligomers at 1 year. Paralleling the pathogenesis of neurodegenerative diseases (eg, Parkinson disease), pre-amyloid oligomers-associated alterations in cardiac mitochondrial dynamics, haploinsufficiency of wild-type BAG3, and activation of p38 signaling were identified. Unexpectedly, increased numbers of activated cardiac fibroblasts were identified in Bag3 P209L Tg+ hearts without increased fibrosis. Together, these findings point to a previously undescribed therapeutic target that may have application to mutation-induced myofibrillar myopathies as well as other common causes of heart failure that commonly harbor misfolded proteins.
Collapse
Affiliation(s)
- Megan T Quintana
- Department of Surgery, University of North Carolina, Chapel Hill, North Carolina
| | - Traci L Parry
- McAllister Heart Institute, University of North Carolina, Chapel Hill, North Carolina
| | - Jun He
- General Hospital of Ningxia Medical University, Yinchuan, Ningxia, People's Republic of China
| | - Cecelia C Yates
- Department of Health Promotions and Development, School of Nursing, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Tatiana N Sidorova
- Departments of Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Katherine T Murray
- Departments of Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - James R Bain
- Sarah W. Stedman Nutrition and Metabolism Center, Duke Molecular Physiology Institute, Duke University Medical Center, Durham, North Carolina; Division of Endocrinology, Metabolism, and Nutrition, Department of Medicine, Duke University Medical Center, Durham, North Carolina
| | - Christopher B Newgard
- Sarah W. Stedman Nutrition and Metabolism Center, Duke Molecular Physiology Institute, Duke University Medical Center, Durham, North Carolina; Division of Endocrinology, Metabolism, and Nutrition, Department of Medicine, Duke University Medical Center, Durham, North Carolina
| | - Michael J Muehlbauer
- Sarah W. Stedman Nutrition and Metabolism Center, Duke Molecular Physiology Institute, Duke University Medical Center, Durham, North Carolina
| | - Samuel C Eaton
- Department of Pharmacology, University of North Carolina, Chapel Hill, North Carolina
| | | | - Shin Takayama
- Department of Pathology, Boston University, Boston, Massachusetts
| | - Monte S Willis
- McAllister Heart Institute, University of North Carolina, Chapel Hill, North Carolina; Department of Pharmacology, University of North Carolina, Chapel Hill, North Carolina; Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, North Carolina.
| |
Collapse
|
36
|
New insights into the protein aggregation pathology in myotilinopathy by combined proteomic and immunolocalization analyses. Acta Neuropathol Commun 2016; 4:8. [PMID: 26842778 PMCID: PMC4739336 DOI: 10.1186/s40478-016-0280-0] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Accepted: 01/23/2016] [Indexed: 01/09/2023] Open
Abstract
Introduction Myofibrillar myopathies are characterized by progressive muscle weakness and impressive abnormal protein aggregation in muscle fibers. In about 10 % of patients, the disease is caused by mutations in the MYOT gene encoding myotilin. The aim of our study was to decipher the composition of protein deposits in myotilinopathy to get new information about aggregate pathology. Results Skeletal muscle samples from 15 myotilinopathy patients were included in the study. Aggregate and control samples were collected from muscle sections by laser microdissection and subsequently analyzed by a highly sensitive proteomic approach that enables a relative protein quantification. In total 1002 different proteins were detected. Seventy-six proteins showed a significant over-representation in aggregate samples including 66 newly identified aggregate proteins. Z-disc-associated proteins were the most abundant aggregate components, followed by sarcolemmal and extracellular matrix proteins, proteins involved in protein quality control and degradation, and proteins with a function in actin dynamics or cytoskeletal transport. Forty over-represented proteins were evaluated by immunolocalization studies. These analyses validated our mass spectrometric data and revealed different regions of protein accumulation in abnormal muscle fibers. Comparison of data from our proteomic analysis in myotilinopathy with findings in other myofibrillar myopathy subtypes indicates a characteristic basic pattern of aggregate composition and resulted in identification of a highly sensitive and specific diagnostic marker for myotilinopathy. Conclusions Our findings i) indicate that main protein components of aggregates belong to a network of interacting proteins, ii) provide new insights into the complex regulation of protein degradation in myotilinopathy that may be relevant for new treatment strategies, iii) imply a combination of a toxic gain-of-function leading to myotilin-positive protein aggregates and a loss-of-function caused by a shift in subcellular distribution with a deficiency of myotilin at Z-discs that impairs the integrity of myofibrils, and iv) demonstrate that proteomic analysis can be helpful in differential diagnosis of protein aggregate myopathies. Electronic supplementary material The online version of this article (doi:10.1186/s40478-016-0280-0) contains supplementary material, which is available to authorized users.
Collapse
|
37
|
Cui T, Lai Y, Janicki JS, Wang X. Nuclear factor erythroid-2 related factor 2 (Nrf2)-mediated protein quality control in cardiomyocytes. Front Biosci (Landmark Ed) 2016; 21:192-202. [PMID: 26709769 DOI: 10.2741/4384] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Protein quality control (PQC) acts to minimize the level and toxicity of malfolded proteins in the cell. It is performed by an elaborate network of molecular chaperones and targeted protein degradation pathways. PQC monitors and maintains protein homeostasis or proteostasis in the cells. Whilst chaperones may actively promote refolding of malfolded proteins, the malfolded proteins which cannot be correctly refolded are degraded by the ubiquitin proteasome system (UPS) and the autophagic-lysosome pathway (ALP). The UPS degrades individual misfolded protein molecules, whereas the ALP removes large and less soluble protein aggregates and organelles. Emerging evidence indicates that dysregulated and inadequate PQC play an important role in the pathogenesis of not only classic conformational disease but more common forms of cardiac pathology such as cardiac pathological hypertrophy and heart failure. Nuclear factor erythroid 2-related factor 2 (Nrf2), a master transcription factor of cellular defense, appears to regulate the USP and the ALP by directly controlling the expression of UPS- and ALP- related genes. This article highlights an emerging role of Nrf2 in the regulation of intracellular PQC as well as its potential involvement in cardiac pathology.
Collapse
Affiliation(s)
| | | | - Jospeh S Janicki
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC, 29209, USA
| | - Xuejun Wang
- Division of Biomedical Sciences, University of South Dakota Sanford School of Medicine, Vermillion, South Dakota, USA.,
| |
Collapse
|
38
|
Bakthisaran R, Akula KK, Tangirala R, Rao CM. Phosphorylation of αB-crystallin: Role in stress, aging and patho-physiological conditions. Biochim Biophys Acta Gen Subj 2015; 1860:167-82. [PMID: 26415747 DOI: 10.1016/j.bbagen.2015.09.017] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 09/22/2015] [Accepted: 09/23/2015] [Indexed: 01/18/2023]
Abstract
BACKGROUND αB-crystallin, once thought to be a lenticular protein, is ubiquitous and has critical roles in several cellular processes that are modulated by phosphorylation. Serine residues 19, 45 and 59 of αB-crystallin undergo phosphorylation. Phosphorylation of S45 is mediated by p44/42 MAP kinase, whereas S59 phosphorylation is mediated by MAPKAP kinase-2. Pathway involved in S19 phosphorylation is not known. SCOPE OF REVIEW The review highlights the role of phosphorylation in (i) oligomeric structure, stability and chaperone activity, (ii) cellular processes such as apoptosis, myogenic differentiation, cell cycle regulation and angiogenesis, and (iii) aging, stress, cardiomyopathy-causing αB-crystallin mutants, and in other diseases. MAJOR CONCLUSIONS Depending on the context and extent of phosphorylation, αB-crystallin seems to confer beneficial or deleterious effects. Phosphorylation alters structure, stability, size distribution and dynamics of the oligomeric assembly, thus modulating chaperone activity and various cellular processes. Phosphorylated αB-crystallin has a tendency to partition to the cytoskeleton and hence to the insoluble fraction. Low levels of phosphorylation appear to be protective, while hyperphosphorylation has negative implications. Mutations in αB-crystallin, such as R120G, Q151X and 464delCT, associated with inherited myofibrillar myopathy lead to hyperphosphorylation and intracellular inclusions. An ongoing study in our laboratory with phosphorylation-mimicking mutants indicates that phosphorylation of R120GαB-crystallin increases its propensity to aggregate. GENERAL SIGNIFICANCE Phosphorylation of αB-crystallin has dual role that manifests either beneficial or deleterious consequences depending on the extent of phosphorylation and interaction with cytoskeleton. Considering that disease-causing mutants of αB-crystallin are hyperphosphorylated, moderation of phosphorylation may be a useful strategy in disease management. This article is part of a Special Issue entitled Crystallin Biochemistry in Health and Disease.
Collapse
Affiliation(s)
- Raman Bakthisaran
- CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500 007, India
| | - Kranthi Kiran Akula
- CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500 007, India
| | - Ramakrishna Tangirala
- CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500 007, India
| | - Ch Mohan Rao
- CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500 007, India.
| |
Collapse
|
39
|
Thottakara T, Friedrich FW, Reischmann S, Braumann S, Schlossarek S, Krämer E, Juhr D, Schlüter H, van der Velden J, Münch J, Patten M, Eschenhagen T, Moog-Lutz C, Carrier L. The E3 ubiquitin ligase Asb2β is downregulated in a mouse model of hypertrophic cardiomyopathy and targets desmin for proteasomal degradation. J Mol Cell Cardiol 2015; 87:214-24. [PMID: 26343497 DOI: 10.1016/j.yjmcc.2015.08.020] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Revised: 08/28/2015] [Accepted: 08/29/2015] [Indexed: 11/16/2022]
Abstract
BACKGROUND Hypertrophic cardiomyopathy (HCM) is an autosomal-dominant disease with mutations in genes encoding sarcomeric proteins. Previous findings suggest deregulation of the ubiquitin proteasome system (UPS) in HCM in humans and in a mouse model of HCM (Mybpc3-targeted knock-in (KI) mice). In this study we investigated transcript levels of several muscle-specific E3 ubiquitin ligases in KI mice and aimed at identifying novel protein targets. METHODS AND RESULTS Out of 9 muscle-specific E3 ligases, Asb2β was found with the lowest mRNA level in KI compared to wild-type (WT) mice. After adenoviral-mediated Asb2β transduction of WT neonatal mouse cardiomyocytes with either a WT or inactive Asb2β mutant, desmin was identified as a new target of Asb2β by mass spectrometry, co-immunoprecipitation and immunoblotting. Immunofluorescence analysis revealed a co-localization of desmin with Asb2β at the Z-disk of the sarcomere. Knock-down of Asb2β in cardiomyocytes resulted in higher desmin protein levels. Furthermore, desmin levels were higher in ventricular samples of HCM mice and patients than controls. CONCLUSIONS This study identifies desmin as a new Asb2β target for proteasomal degradation in cardiomyocytes and suggests that accumulation of desmin could contribute to UPS impairment in HCM mice and patients.
Collapse
Affiliation(s)
- Tilo Thottakara
- Department of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany;; DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Germany;; University Heart Center Hamburg, Hamburg, Germany
| | - Felix W Friedrich
- Department of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany;; DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Germany;.
| | - Silke Reischmann
- Department of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany;; DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Germany
| | - Simon Braumann
- Department of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany;; DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Germany
| | - Saskia Schlossarek
- Department of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany;; DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Germany
| | - Elisabeth Krämer
- Department of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany;; DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Germany
| | - Denise Juhr
- Department of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Hartmut Schlüter
- Institute of Clinical Chemistry, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jolanda van der Velden
- Department of Physiology, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, the Netherlands; ICIN-Netherlands Heart Institute, Utrecht, the Netherlands
| | - Julia Münch
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Germany;; University Heart Center Hamburg, Hamburg, Germany
| | - Monica Patten
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Germany;; University Heart Center Hamburg, Hamburg, Germany
| | - Thomas Eschenhagen
- Department of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany;; DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Germany
| | - Christel Moog-Lutz
- Institut de Pharmacologie et de Biologie Structurale, CNRS, Toulouse, France;; Université de Toulouse, UPS, Toulouse, France
| | - Lucie Carrier
- Department of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany;; DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Germany;.
| |
Collapse
|
40
|
Fittipaldi S, Mercatelli N, Dimauro I, Jackson MJ, Paronetto MP, Caporossi D. Alpha B-crystallin induction in skeletal muscle cells under redox imbalance is mediated by a JNK-dependent regulatory mechanism. Free Radic Biol Med 2015; 86:331-42. [PMID: 26066304 DOI: 10.1016/j.freeradbiomed.2015.05.035] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 05/12/2015] [Accepted: 05/30/2015] [Indexed: 11/28/2022]
Abstract
The small heat shock protein α-B-crystallin (CRYAB) is critically involved in stress-related cellular processes such as differentiation, apoptosis, and redox homeostasis. The up-regulation of CRYAB plays a key role in the cytoprotective and antioxidant response, but the molecular pathway driving its expression in muscle cells during oxidative stress still remains unknown. Here we show that noncytotoxic exposure to sodium meta-arsenite (NaAsO2) inducing redox imbalance is able to increase the CRYAB content of C2C12 myoblasts in a transcription-dependent manner. Our in silico analysis revealed a genomic region upstream of the Cryab promoter containing two putative antioxidant-responsive elements motifs and one AP-1-like binding site. The redox-sensitive transcription factors Nrf2 and the AP-1 component c-Jun were found to be up-regulated in NaAsO2-treated cells, and we demonstrated a specific NaAsO2-mediated increase of c-Jun and Nrf2 binding activity to the genomic region identified, supporting their putative involvement in CRYAB regulation following a shift in redox balance. These changes also correlated with a specific phosphorylation of JNK and p38 MAPK kinases, the well-known molecular mediators of signaling pathways leading to the activation of these transcription factors. Pretreatment of C2C12 cells with the JNK inhibitor SP600125 induced a decrease in c-Jun and Nrf2 content and was able to counteract the NaAsO2-mediated increase in CRYAB expression. Thus these data show a direct role of JNK in CRYAB regulation under redox imbalance and also point to a previously unrecognized link between c-Jun and Nrf2 transcription factors and redox-induced CRYAB expression in muscle cells.
Collapse
Affiliation(s)
- Simona Fittipaldi
- Unit of Biology, Genetics and Biochemistry, Department of Movement, Human and Health Sciences, University of Rome "Foro Italico", Piazza Lauro De Bosis 15, Rome 00135, Italy
| | - Neri Mercatelli
- Unit of Biology, Genetics and Biochemistry, Department of Movement, Human and Health Sciences, University of Rome "Foro Italico", Piazza Lauro De Bosis 15, Rome 00135, Italy.
| | - Ivan Dimauro
- Unit of Biology, Genetics and Biochemistry, Department of Movement, Human and Health Sciences, University of Rome "Foro Italico", Piazza Lauro De Bosis 15, Rome 00135, Italy
| | - Malcolm J Jackson
- MRC-Arthritis Research UK Centre for Integrated Research into Musculoskeletal Ageing (CIMA), Department of Musculoskeletal Biology Institute of Ageing and Chronic Disease, University of Liverpool, L69 3GA, Liverpool, UK
| | - Maria Paola Paronetto
- Unit of Biology, Genetics and Biochemistry, Department of Movement, Human and Health Sciences, University of Rome "Foro Italico", Piazza Lauro De Bosis 15, Rome 00135, Italy; Laboratory of Molecular and Cellular Neurobiology, CERC Fondazione Santa Lucia, Rome, Italy
| | - Daniela Caporossi
- Unit of Biology, Genetics and Biochemistry, Department of Movement, Human and Health Sciences, University of Rome "Foro Italico", Piazza Lauro De Bosis 15, Rome 00135, Italy
| |
Collapse
|
41
|
Der Perng M, Quinlan RA. The Dynamic Duo of Small Heat Proteins and IFs Maintain Cell Homeostasis, Resist Cellular Stress and Enable Evolution in Cells and Tissues. HEAT SHOCK PROTEINS 2015. [DOI: 10.1007/978-3-319-16077-1_17] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
42
|
McLendon PM, Ferguson BS, Osinska H, Bhuiyan MS, James J, McKinsey TA, Robbins J. Tubulin hyperacetylation is adaptive in cardiac proteotoxicity by promoting autophagy. Proc Natl Acad Sci U S A 2014; 111:E5178-86. [PMID: 25404307 PMCID: PMC4260547 DOI: 10.1073/pnas.1415589111] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Proteinopathy causes cardiac disease, remodeling, and heart failure but the pathological mechanisms remain obscure. Mutated αB-crystallin (CryAB(R120G)), when expressed only in cardiomyocytes in transgenic (TG) mice, causes desmin-related cardiomyopathy, a protein conformational disorder. The disease is characterized by the accumulation of toxic misfolded protein species that present as perinuclear aggregates known as aggresomes. Previously, we have used the CryAB(R120G) model to determine the underlying processes that result in these pathologic accumulations and to explore potential therapeutic windows that might be used to decrease proteotoxicity. We noted that total ventricular protein is hypoacetylated while hyperacetylation of α-tubulin, a substrate of histone deacetylase 6 (HDAC6) occurs. HDAC6 has critical roles in protein trafficking and autophagy, but its function in the heart is obscure. Here, we test the hypothesis that tubulin acetylation is an adaptive process in cardiomyocytes. By modulating HDAC6 levels and/or activity genetically and pharmacologically, we determined the effects of tubulin acetylation on aggregate formation in CryAB(R120G) cardiomyocytes. Increasing HDAC6 accelerated aggregate formation, whereas siRNA-mediated knockdown or pharmacological inhibition ameliorated the process. HDAC inhibition in vivo induced tubulin hyperacetylation in CryAB(R120G) TG hearts, which prevented aggregate formation and significantly improved cardiac function. HDAC6 inhibition also increased autophagic flux in cardiomyocytes, and increased autophagy in the diseased heart correlated with increased tubulin acetylation, suggesting that autophagy induction might underlie the observed cardioprotection. Taken together, our data suggest a mechanistic link between tubulin hyperacetylation and autophagy induction and points to HDAC6 as a viable therapeutic target in cardiovascular disease.
Collapse
Affiliation(s)
- Patrick M McLendon
- The Heart Institute, Department of Pediatrics, Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229; and
| | - Bradley S Ferguson
- Department of Medicine, Division of Cardiology, Anschutz Medical Campus, University of Colorado Denver, Aurora, CO 80045
| | - Hanna Osinska
- The Heart Institute, Department of Pediatrics, Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229; and
| | - Md Shenuarin Bhuiyan
- The Heart Institute, Department of Pediatrics, Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229; and
| | - Jeanne James
- The Heart Institute, Department of Pediatrics, Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229; and
| | - Timothy A McKinsey
- Department of Medicine, Division of Cardiology, Anschutz Medical Campus, University of Colorado Denver, Aurora, CO 80045
| | - Jeffrey Robbins
- The Heart Institute, Department of Pediatrics, Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229; and
| |
Collapse
|
43
|
Sidorova TN, Mace LC, Wells KS, Yermalitskaya LV, Su PF, Shyr Y, Atkinson JB, Fogo AB, Prinsen JK, Byrne JG, Petracek MR, Greelish JP, Hoff SJ, Ball SK, Glabe CG, Brown NJ, Barnett JV, Murray KT. Hypertension is associated with preamyloid oligomers in human atrium: a missing link in atrial pathophysiology? J Am Heart Assoc 2014; 3:e001384. [PMID: 25468655 PMCID: PMC4338732 DOI: 10.1161/jaha.114.001384] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Background Increasing evidence indicates that proteotoxicity plays a pathophysiologic role in experimental and human cardiomyopathy. In organ‐specific amyloidoses, soluble protein oligomers are the primary cytotoxic species in the process of protein aggregation. While isolated atrial amyloidosis can develop with aging, the presence of preamyloid oligomers (PAOs) in atrial tissue has not been previously investigated. Methods and Results Atrial samples were collected during elective cardiac surgery in patients without a history of atrial arrhythmias, congestive heart failure, cardiomyopathy, or amyloidosis. Immunohistochemistry was performed for PAOs using a conformation‐specific antibody, as well as for candidate proteins identified previously in isolated atrial amyloidosis. Using a myocardium‐specific marker, the fraction of myocardium colocalizing with PAOs (PAO burden) was quantified (green/red ratio). Atrial samples were obtained from 92 patients, with a mean age of 61.7±13.8 years. Most patients (62%) were male, 23% had diabetes, 72% had hypertension, and 42% had coronary artery disease. A majority (n=62) underwent aortic valve replacement, with fewer undergoing coronary artery bypass grafting (n=34) or mitral valve replacement/repair (n=24). Immunostaining detected intracellular PAOs in a majority of atrial samples, with a heterogeneous distribution throughout the myocardium. Mean green/red ratio value for the samples was 0.11±0.1 (range 0.03 to 0.77), with a value ≥0.05 in 74 patients. Atrial natriuretic peptide colocalized with PAOs in myocardium, whereas transthyretin was located in the interstitium. Adjusting for multiple covariates, PAO burden was independently associated with the presence of hypertension. Conclusion PAOs are frequently detected in human atrium, where their presence is associated with clinical hypertension.
Collapse
Affiliation(s)
- Tatiana N Sidorova
- Department of Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, TN (T.N.S., L.C.M., L.V.Y., J.K.P., N.J.B., J.V.B., K.T.M.)
| | - Lisa C Mace
- Department of Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, TN (T.N.S., L.C.M., L.V.Y., J.K.P., N.J.B., J.V.B., K.T.M.)
| | - K Sam Wells
- Departments of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, TN (S.W.)
| | - Liudmila V Yermalitskaya
- Department of Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, TN (T.N.S., L.C.M., L.V.Y., J.K.P., N.J.B., J.V.B., K.T.M.)
| | - Pei-Fang Su
- Center for Quantitative Sciences, Vanderbilt University School of Medicine, Nashville, TN (P.F.S., Y.S.)
| | - Yu Shyr
- Center for Quantitative Sciences, Vanderbilt University School of Medicine, Nashville, TN (P.F.S., Y.S.)
| | - James B Atkinson
- Departments of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, TN (J.B.A., A.B.F.)
| | - Agnes B Fogo
- Departments of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, TN (J.B.A., A.B.F.)
| | - Joseph K Prinsen
- Department of Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, TN (T.N.S., L.C.M., L.V.Y., J.K.P., N.J.B., J.V.B., K.T.M.)
| | - John G Byrne
- Department of Cardiac Surgery, Vanderbilt University School of Medicine, Nashville, TN (J.G.B., M.R.P., J.P.G., S.J.H., S.K.B.)
| | - Michael R Petracek
- Department of Cardiac Surgery, Vanderbilt University School of Medicine, Nashville, TN (J.G.B., M.R.P., J.P.G., S.J.H., S.K.B.)
| | - James P Greelish
- Department of Cardiac Surgery, Vanderbilt University School of Medicine, Nashville, TN (J.G.B., M.R.P., J.P.G., S.J.H., S.K.B.)
| | - Steven J Hoff
- Department of Cardiac Surgery, Vanderbilt University School of Medicine, Nashville, TN (J.G.B., M.R.P., J.P.G., S.J.H., S.K.B.)
| | - Stephen K Ball
- Department of Cardiac Surgery, Vanderbilt University School of Medicine, Nashville, TN (J.G.B., M.R.P., J.P.G., S.J.H., S.K.B.)
| | | | - Nancy J Brown
- Department of Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, TN (T.N.S., L.C.M., L.V.Y., J.K.P., N.J.B., J.V.B., K.T.M.)
| | - Joey V Barnett
- Department of Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, TN (T.N.S., L.C.M., L.V.Y., J.K.P., N.J.B., J.V.B., K.T.M.)
| | - Katherine T Murray
- Department of Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, TN (T.N.S., L.C.M., L.V.Y., J.K.P., N.J.B., J.V.B., K.T.M.)
| |
Collapse
|
44
|
Mitra A, Ray A, Datta R, Sengupta S, Sarkar S. Cardioprotective Role of P38 MAPK During Myocardial Infarction Via Parallel Activation of α-Crystallin B and Nrf2. J Cell Physiol 2014; 229:1272-82. [DOI: 10.1002/jcp.24565] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Accepted: 01/22/2014] [Indexed: 01/25/2023]
Affiliation(s)
- Arkadeep Mitra
- Genetics and Molecular Cardiology Laboratory; Department of Zoology; University of Calcutta; Kolkata India
| | - Aramita Ray
- Genetics and Molecular Cardiology Laboratory; Department of Zoology; University of Calcutta; Kolkata India
| | - Ritwik Datta
- Genetics and Molecular Cardiology Laboratory; Department of Zoology; University of Calcutta; Kolkata India
| | - Shantanu Sengupta
- Genomics and Molecular Medicine Unit; CSIR-Institute of Genomics and Integrative Biology; New Delhi India
| | - Sagartirtha Sarkar
- Genetics and Molecular Cardiology Laboratory; Department of Zoology; University of Calcutta; Kolkata India
| |
Collapse
|
45
|
Tarone G, Brancaccio M. Keep your heart in shape: molecular chaperone networks for treating heart disease. Cardiovasc Res 2014; 102:346-61. [PMID: 24585203 DOI: 10.1093/cvr/cvu049] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Despite major advances in the treatment of cardiac diseases, there is still a great need for drugs capable of counteracting the deterioration of cardiac muscle function in congestive heart failure. The role of misfolded protein accumulation as a causal event in the physiopathology of common cardiac diseases is an important emerging concept. Indeed, diverse stress conditions, including mechanical stretching and oxidative stress, can induce misfolded protein accumulation, causing cardiomyocyte death. Cells react to these stress conditions by activating molecular chaperones, a class of proteins that represents an endogenous salvage machinery, essential for rescuing physiological cell functions and sustaining cell survival. Chaperones, also known as heat shock proteins (Hsps), prevent accumulation of damaged proteins by promoting either their refolding or degradation via the proteasome or the autophagosome systems. In addition, molecular chaperones play a key role in intracellular signalling by controlling conformational changes required for activation/deactivation of signalling proteins, and their assembly in specific signalosome complexes. The key role of molecular chaperones in heart function is highlighted by the fact that a number of genetic mutations in chaperone proteins result in different forms of cardiomyopathies. Moreover, a considerable amount of experimental evidence indicates that increasing expression of chaperone proteins leads to an important cardio-protective role in ischaemia/reperfusion injury, heart failure, and arrhythmia, implicating these molecules as potential innovative therapeutic agents.
Collapse
Affiliation(s)
- Guido Tarone
- Department of Molecular Biotechnology and Health Sciences, University of Turin, Italy, Via Nizza 52, Torino 10126, Italy
| | - Mara Brancaccio
- Department of Molecular Biotechnology and Health Sciences, University of Turin, Italy, Via Nizza 52, Torino 10126, Italy
| |
Collapse
|
46
|
Dubińska-Magiera M, Jabłońska J, Saczko J, Kulbacka J, Jagla T, Daczewska M. Contribution of small heat shock proteins to muscle development and function. FEBS Lett 2014; 588:517-30. [PMID: 24440355 DOI: 10.1016/j.febslet.2014.01.005] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Revised: 12/17/2013] [Accepted: 01/02/2014] [Indexed: 12/17/2022]
Abstract
Investigations undertaken over the past years have led scientists to introduce the concept of protein quality control (PQC) systems, which are responsible for polypeptide processing. The PQC system monitors proteostasis and involves activity of different chaperones such as small heat shock proteins (sHSPs). These proteins act during normal conditions as housekeeping proteins regulating cellular processes, and during stress conditions. They also mediate the removal of toxic misfolded polypeptides and thereby prevent development of pathogenic states. It is postulated that sHSPs are involved in muscle development. They could act via modulation of myogenesis or by maintenance of the structural integrity of signaling complexes. Moreover, mutations in genes coding for sHSPs lead to pathological states affecting muscular tissue functioning. This review focuses on the question how sHSPs, still relatively poorly understood proteins, contribute to the development and function of three types of muscle tissue: skeletal, cardiac and smooth.
Collapse
Affiliation(s)
- Magda Dubińska-Magiera
- Department of Animal Developmental Biology, University of Wroclaw, 21 Sienkiewicza Street, 50-335 Wroclaw, Poland
| | - Jadwiga Jabłońska
- Department of Animal Developmental Biology, University of Wroclaw, 21 Sienkiewicza Street, 50-335 Wroclaw, Poland
| | - Jolanta Saczko
- Department of Medical Biochemistry, Medical University, Chalubinskiego 10, 50-368 Wroclaw, Poland
| | - Julita Kulbacka
- Department of Medical Biochemistry, Medical University, Chalubinskiego 10, 50-368 Wroclaw, Poland
| | - Teresa Jagla
- Institut National de la Santé et de la Recherche Médicale U384, Faculté de Medecine, Clermont-Ferrand, France
| | - Małgorzata Daczewska
- Department of Animal Developmental Biology, University of Wroclaw, 21 Sienkiewicza Street, 50-335 Wroclaw, Poland.
| |
Collapse
|
47
|
Kötter S, Unger A, Hamdani N, Lang P, Vorgerd M, Nagel-Steger L, Linke WA. Human myocytes are protected from titin aggregation-induced stiffening by small heat shock proteins. ACTA ACUST UNITED AC 2014; 204:187-202. [PMID: 24421331 PMCID: PMC3897184 DOI: 10.1083/jcb.201306077] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Small heat shock proteins translocate to unfolded titin Ig domains under stress conditions to prevent titin aggregation and myocyte stiffening. In myocytes, small heat shock proteins (sHSPs) are preferentially translocated under stress to the sarcomeres. The functional implications of this translocation are poorly understood. We show here that HSP27 and αB-crystallin associated with immunoglobulin-like (Ig) domain-containing regions, but not the disordered PEVK domain (titin region rich in proline, glutamate, valine, and lysine), of the titin springs. In sarcomeres, sHSP binding to titin was actin filament independent and promoted by factors that increased titin Ig unfolding, including sarcomere stretch and the expression of stiff titin isoforms. Titin spring elements behaved predominantly as monomers in vitro. However, unfolded Ig segments aggregated, preferentially under acidic conditions, and αB-crystallin prevented this aggregation. Disordered regions did not aggregate. Promoting titin Ig unfolding in cardiomyocytes caused elevated stiffness under acidic stress, but HSP27 or αB-crystallin suppressed this stiffening. In diseased human muscle and heart, both sHSPs associated with the titin springs, in contrast to the cytosolic/Z-disk localization seen in healthy muscle/heart. We conclude that aggregation of unfolded titin Ig domains stiffens myocytes and that sHSPs translocate to these domains to prevent this aggregation.
Collapse
Affiliation(s)
- Sebastian Kötter
- Department of Cardiovascular Physiology and 2 Neurological University Clinic Bergmannsheil, Ruhr University Bochum, 44780 Bochum, Germany
| | | | | | | | | | | | | |
Collapse
|
48
|
Li C, Qiu Q, Wang Y, Li P, Xiao C, Wang H, Lin Y, Wang W. Time course label-free quantitative analysis of cardiac muscles of rats after myocardial infarction. MOLECULAR BIOSYSTEMS 2014; 10:505-13. [PMID: 24382414 DOI: 10.1039/c3mb70422j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Heart failure is a worldwide cause of mortality and morbidity and is the ultimate ending of a variety of complex diseases. This reflects our incomplete understanding of its underlying molecular mechanisms and furthermore increases the complexity of the disease. To better understand the molecular mechanisms of heart failure, we investigated dynamic proteomic differences between the heart tissue of myocardial infarction rats and the rats in the sham group at days 4, 14, 28, 45 after operation. Using a label-free quantitative proteomic approach based on nanoscale ultra-performance liquid chromatography-ESI-MS(E), 133 proteins were identified at the four time points in 8 groups. 13 non-redundant proteins changed dynamically after acute myocardial infarction (AMI) in rat left ventricular (LV) tissue, including cytoskeletal proteins, metabolic enzymes, oxidative stress related proteins and ion channel proteins. The network analysis showed that the differential protein might play an important role in lipid metabolism and hypertrophic cardiomyopathy. The dynamic changes in the expression of beta-actin, alpha B-crystallin (CryAB), heat shock protein 8(HSP8), desmin and l-lactate dehydrogenase B (LDHB) were tested by the western-blot assay, and the results were consistent with the label-free quantitative proteomic results. Correlative analysis indicates that the CryAB and desmin have a better linear relation with heart function (ejection fraction) than cardiac troponin T (cTNT). Our results provide the first experimental evidence of the proteins that are differentially expressed following myocardial infarction, using time-course label-free quantitative proteomics in vivo without ischemia-reperfusion injury or myocardial ischemia. These differential functional proteins (especially CryAB and desmin) have different patterns during the myocardial infarction, which may partially account for the underlying mechanisms involved in cardiac rehabilitation.
Collapse
Affiliation(s)
- Chun Li
- Modern Research Center for Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | | | | | | | | | | | | | | |
Collapse
|
49
|
Fiedler LR, Maifoshie E, Schneider MD. Mouse models of heart failure: cell signaling and cell survival. Curr Top Dev Biol 2014; 109:171-247. [PMID: 24947238 DOI: 10.1016/b978-0-12-397920-9.00002-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Heart failure is one of the paramount global causes of morbidity and mortality. Despite this pandemic need, the available clinical counter-measures have not altered substantially in recent decades, most notably in the context of pharmacological interventions. Cell death plays a causal role in heart failure, and its inhibition poses a promising approach that has not been thoroughly explored. In previous approaches to target discovery, clinical failures have reflected a deficiency in mechanistic understanding, and in some instances, failure to systematically translate laboratory findings toward the clinic. Here, we review diverse mouse models of heart failure, with an emphasis on those that identify potential targets for pharmacological inhibition of cell death, and on how their translation into effective therapies might be improved in the future.
Collapse
Affiliation(s)
- Lorna R Fiedler
- British Heart Foundation Centre of Research Excellence, National Heart and Lung Institute, Imperial College London, London, UK.
| | - Evie Maifoshie
- British Heart Foundation Centre of Research Excellence, National Heart and Lung Institute, Imperial College London, London, UK
| | - Michael D Schneider
- British Heart Foundation Centre of Research Excellence, National Heart and Lung Institute, Imperial College London, London, UK.
| |
Collapse
|
50
|
Panda S, Biswas S, Kar A. Trigonelline isolated from fenugreek seed protects against isoproterenol-induced myocardial injury through down-regulation of Hsp27 and αB-crystallin. Nutrition 2013; 29:1395-403. [DOI: 10.1016/j.nut.2013.05.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2012] [Revised: 05/01/2013] [Accepted: 05/11/2013] [Indexed: 11/16/2022]
|