1
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Gritsyna YV, Grabarskaya MA, Mikhailova GZ, Popova SS, Bobyleva LG, Ermakov AM, Zakharova NM, Vikhlyantsev IM. Differential Expression of Titin and Obscurin mRNA in Striated Muscles of the Long-Tailed Ground Squirrel Urocitellus undulatus. J EVOL BIOCHEM PHYS+ 2022. [DOI: 10.1134/s0022093022050052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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2
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TTN mutations predict a poor prognosis in patients with thyroid cancer. Biosci Rep 2022; 42:231494. [PMID: 35766333 PMCID: PMC9310696 DOI: 10.1042/bsr20221168] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 06/27/2022] [Accepted: 06/28/2022] [Indexed: 11/17/2022] Open
Abstract
OBJECTIVE We aimed to investigate the relationship between titin (TTN) gene mutations and thyroid cancer (THCA) and to explore the feasibility of the TTN gene as a potential prognostic indicator of THCA. METHODS From TCGA-THCA cohort, we performed a series of analyses to evaluate the prognostic value and potential mechanism of TTN in THCA. These patients were divided into the mutant-type (MUT) group and the wild-type (WT) group. Differentially expressed genes (DEGs) in the two groups were screened using the 'DESeq2' R package. Functional enrichment analysis was performed, and the protein-protein interaction (PPI) network, transcription factor (TF)-target interaction networks, and competitive endogenous RNA (ceRNA) regulatory networks were established for the DEGs. The TIMER database was applied for immune cell infiltration. Survival analysis and Cox regression analysis were used to analyze the potential prognostic value of the TTN gene. RESULTS Differential expression analysis showed that 409 genes were significantly up-regulated and 36 genes were down-regulated. Functional enrichment analysis revealed that TTN gene mutations played a potential role in the development of THCA. Analysis of the immune microenvironment indicated that TTN gene mutations were significantly associated with enrichment of M0 macrophages. Survival analysis showed that the MUT group predicted poorer prognosis than the WT group. Cox regression analysis demonstrated that TTN gene mutations were an independent risk factor for THCA. Nomograms also confirmed the prognostic values of the TTN gene in THCA. Conclusions In summary, our results demonstrated that TTN gene mutations predict poor prognosis in patients with THCA. This is the first study to research TTN gene mutations in THCA and to investigate their prognostic value in THCA.
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3
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Rhoden A, Schulze T, Pietsch N, Christ T, Hansen A, Eschenhagen T. Comprehensive analyses of the inotropic compound omecamtiv mecarbil in rat and human cardiac preparations. Am J Physiol Heart Circ Physiol 2022; 322:H373-H385. [PMID: 35030072 DOI: 10.1152/ajpheart.00534.2021] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Omecamtiv mecarbil (OM), a myosin activator, was reported to induce complex concentration- and species-dependent effects on contractile function and clinical studies indicated a low therapeutic index with diastolic dysfunction at concentrations above 1 µM. To further characterize effects of OM in a human context and under different preload conditions, we constructed a setup that allows isometric contractility analyses of human induced pluripotent stem cell (hiPSC)-derived engineered heart tissues (EHTs). The results were compared to effects of OM on the very same EHTs measured under auxotonic conditions. OM induced a sustained, concentration-dependent increase in time-to-peak under all conditions (maximally 2-3 fold). Peak force, in contrast, was increased by OM only in human, but not rat EHTs and only under isometric conditions, varied between hiPSC lines and showed a biphasic concentration-dependency with maximal effects at 1 µM. Relaxation time tended to fall under auxotonic and strongly increase under isometric conditions, again with biphasic concentration-dependency. Diastolic tension concentration-dependently increased under all conditions. The latter was reduced by an inhibitor of the mitochondrial sodium calcium exchanger (CGP-37157). OM induced increases in mitochondrial oxidation in isolated cardiomyocytes, indicating that OM, an inotrope that does not increase intracellular and mitochondrial Ca2+, can induce mismatch between an increase in ATP and ROS production and unstimulated mitochondrial redox capacity. Taken together, we developed a novel setup well suitable for isometric measurements of EHTs. The effects of OM on contractility and diastolic tension are complex with concentration-, time-, species- and loading-dependent differences. Effects on mitochondrial function require further studies.
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Affiliation(s)
- Alexandra Rhoden
- Institute of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Thomas Schulze
- Institute of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Niels Pietsch
- Institute of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Torsten Christ
- Institute of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Arne Hansen
- Institute of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Thomas Eschenhagen
- Institute of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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4
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Verwijs SM, Pinto YM, Kuster DWD, van der Velden J, Limpens J, van Hattum JC, van der Crabben SN, Lekanne Deprez RH, Wilde AAM, Jørstad HT. Beneficial effects of cardiomyopathy-associated genetic variants on physical performance: a hypothesis-generating scoping review. Cardiology 2021; 147:90-97. [PMID: 34706369 DOI: 10.1159/000520471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 08/26/2021] [Indexed: 11/19/2022]
Abstract
Background Genetic variants associated with cardiomyopathies (CMPs) are prevalent in the general population. In young athletes, CMPs account for roughly a quarter of sudden cardiac death, with further unexplained clustering in specific sports. Consequently, most CMPs form a contra-indication for competitive sports. We hypothesized that genetic variants might (paradoxically) improve physical performance early in life while impairing cardiac function later in life. Methods Systematic PubMed search to investigate whether genetic variants in genes associated with CMPs could be related to beneficial performance phenotypes. Summary In a limited number of studies (n=6), 2860 individuals/ subjects with genetic variants were able to outperform those without said variants, as measured by running speed (~38 m/min in heterozygous (HET) mice, n=6 vs ~32 m/min in wild type (WT) mice, n=7, P=0.004) and distance (966±169 km HET mice vs 561±144 km WT mice, P=0.0035, n=10), elite athlete status in endurance athletes (n=1672, P=1.43*10-8), maximal oxygen uptake in elite athletes (absolute difference not provided, n=32, P=0.005), maximal oxygen uptake in unrelated individuals (n=473, P=0.0025), personal records in highly trained marathon runners (2:26:28±0:06:23 min HET, n=32 vs. 2:28:53±0:05:50 min without polymorphism, n=108, P=0.020), and peripheral muscle force contraction in patients following a cardiac rehabilitation programme (absolute values not provided, n=260). Key message Beneficial effects in genetic variants associated with CMPs could hypothetically play a role in the selection of young athletes, consequently explaining the prevalence of such genetic variants in athletes and the general population.
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Affiliation(s)
- Sjoerd M Verwijs
- Department of Cardiology, Amsterdam UMC, University of Amsterdam, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
| | - Yigal M Pinto
- Department of Cardiology, Amsterdam UMC, University of Amsterdam, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
| | - Diederik W D Kuster
- Department of Physiology, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
| | - Jolanda van der Velden
- Department of Physiology, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
| | - Jacqueline Limpens
- Medical Library, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Juliette C van Hattum
- Department of Cardiology, Amsterdam UMC, University of Amsterdam, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
| | - Saskia N van der Crabben
- Department of Clinical Genetics, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Ronald H Lekanne Deprez
- Department of Clinical Genetics, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Arthur A M Wilde
- Department of Cardiology, Amsterdam UMC, University of Amsterdam, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
| | - Harald T Jørstad
- Department of Cardiology, Amsterdam UMC, University of Amsterdam, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
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5
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Popova SS, Yurshenas DA, Mikhailova GZ, Bobyleva LG, Salmov NN, Tyapkina OV, Nurullin LF, Gazizova GR, Nigmetzyanov IR, Gusev OA, Zakharova NM, Vikhlyantsev IM. Stable Level of Giant Sarcomeric Cytoskeletal Proteins in Striated Muscles of the Edible Dormouse Glis glis during Hibernation. J EVOL BIOCHEM PHYS+ 2021. [DOI: 10.1134/s0022093021040128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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6
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Gritsyna YV, Ulanova AD, Popova SS, Bobylev AG, Zhalimov VK, Nemirovskaya TL, Shenkman BS, Vikhlyantsev IM. Inhibition of Histone Deacetylases 4 and 5 Reduces Titin Proteolysis and Prevents Reduction of TTN Gene Expression in Atrophied Rat Soleus Muscle after Seven-Day Hindlimb Unloading. DOKL BIOCHEM BIOPHYS 2020; 495:338-341. [PMID: 33368047 DOI: 10.1134/s1607672920060058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 08/17/2020] [Accepted: 08/17/2020] [Indexed: 11/23/2022]
Abstract
The effect of HDACs 4 and 5 on the level of atrophy, calpain-1 and titin content, and TTN gene expression in rat soleus after 7-day gravitational unloading (hindlimb suspension model) was studied. The development of atrophic changes induced by gravitational unloading in rat soleus was accompanied by an increase in the calpain-1 content, an increase in titin proteolysis, and a decrease in the mRNA content of the protein. Inhibition of HDACs 4 and 5 did not eliminate the development of unloading-induced atrophy but significantly prevented proteolysis of titin and the decrease in the TTN gene expression.
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Affiliation(s)
- Yu V Gritsyna
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Russia
| | - A D Ulanova
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Russia
| | - S S Popova
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Russia
| | - A G Bobylev
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Russia
| | - V K Zhalimov
- Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Russia
| | - T L Nemirovskaya
- Institute of Biomedical Problems, Russian Academy of Sciences, Moscow, Russia
| | - B S Shenkman
- Institute of Biomedical Problems, Russian Academy of Sciences, Moscow, Russia
| | - I M Vikhlyantsev
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Russia.
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7
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Bobyleva LG, Yakupova EI, Ulanova AD, Udaltsov SN, Shumeyko SA, Salmov NN, Bobylev AG, Vikhlyantsev IM. On the Peculiarities of the Aggregation of Multidomain Muscle Proteins. Biophysics (Nagoya-shi) 2019. [DOI: 10.1134/s0006350919050026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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8
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Caru M, Petrykey K, Drouin S, Beaulieu P, St-Onge P, Lemay V, Bertout L, Laverdiere C, Andelfinger G, Krajinovic M, Sinnett D, Curnier D. Identification of genetic association between cardiorespiratory fitness and the trainability genes in childhood acute lymphoblastic leukemia survivors. BMC Cancer 2019; 19:443. [PMID: 31088516 PMCID: PMC6515640 DOI: 10.1186/s12885-019-5651-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 04/29/2019] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND The progress of treatments of childhood acute lymphoblastic leukemia (ALL) has made it possible to reach a survival rate superior to 80%. However, the treatments lead to several long-term adverse effects, including cardiac toxicity. Although studies have reported associations between genetic variants and cardiorespiratory fitness, none has been performed on childhood ALL survivors. METHODS We performed whole-exome sequencing in 239 childhood ALL survivors from the PETALE cohort. Germline variants (both common and rare) in selected set of genes (N = 238) were analyzed for an association with cardiorespiratory fitness. RESULTS Our results showed that the common variant in the TTN gene was significantly associated with a low cardiorespiratory fitness level (p = 0.0005) and that the LEPR, IGFBPI and ENO3 genes were significantly associated with a low cardiorespiratory fitness level in female survivors (p ≤ 0.002). Also, we detected an association between the low cardiorespiratory fitness level in participants that were stratified to the "high risk" prognostic group and functionally predicted rare variants in the SLC22A16 gene (p = 0.001). Positive associations between cardiorespiratory fitness level and trainability genes were mainly observed in females. CONCLUSIONS For the first time, we observed that low cardiorespiratory fitness in childhood ALL survivors can be associated with variants in genes related to subjects' trainability. These findings could allow better childhood ALL patient follow-up tailored to their genetic profile and cardiorespiratory fitness, which could help reduce at least some of the burden of long-term adverse effects of treatments.
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Affiliation(s)
- Maxime Caru
- Laboratoire de Physiopathologie de l'EXercice (LPEX), École de Kinésiologie et des Sciences de l'Activité physique, Faculté de Médecine, Université de Montréal, CEPSUM, 2100, boulevard Édouard Montpetit, Montréal, QC, H3C 3J7, Canada. .,Department of psychology, Laboratoire EA 4430 - Clinique Psychanalyse Developpement (CliPsyD), University of Paris Nanterre, Nanterre, Ile-de-France, France. .,Research Center, Sainte-Justine University Health Center, Montreal, Quebec, Canada.
| | - Kateryna Petrykey
- Research Center, Sainte-Justine University Health Center, Montreal, Quebec, Canada.,Department of pharmacology and physiology, University of Montreal, Montreal, Quebec, Canada
| | - Simon Drouin
- Research Center, Sainte-Justine University Health Center, Montreal, Quebec, Canada
| | - Patrick Beaulieu
- Research Center, Sainte-Justine University Health Center, Montreal, Quebec, Canada
| | - Pascal St-Onge
- Research Center, Sainte-Justine University Health Center, Montreal, Quebec, Canada
| | - Valérie Lemay
- Laboratoire de Physiopathologie de l'EXercice (LPEX), École de Kinésiologie et des Sciences de l'Activité physique, Faculté de Médecine, Université de Montréal, CEPSUM, 2100, boulevard Édouard Montpetit, Montréal, QC, H3C 3J7, Canada.,Research Center, Sainte-Justine University Health Center, Montreal, Quebec, Canada
| | - Laurence Bertout
- Research Center, Sainte-Justine University Health Center, Montreal, Quebec, Canada
| | - Caroline Laverdiere
- Research Center, Sainte-Justine University Health Center, Montreal, Quebec, Canada.,Department of Pediatrics, University of Montreal, Montreal, Quebec, Canada
| | - Gregor Andelfinger
- Research Center, Sainte-Justine University Health Center, Montreal, Quebec, Canada.,Department of Pediatrics, University of Montreal, Montreal, Quebec, Canada
| | - Maja Krajinovic
- Research Center, Sainte-Justine University Health Center, Montreal, Quebec, Canada.,Department of pharmacology and physiology, University of Montreal, Montreal, Quebec, Canada.,Department of Pediatrics, University of Montreal, Montreal, Quebec, Canada
| | - Daniel Sinnett
- Research Center, Sainte-Justine University Health Center, Montreal, Quebec, Canada.,Department of Pediatrics, University of Montreal, Montreal, Quebec, Canada
| | - Daniel Curnier
- Laboratoire de Physiopathologie de l'EXercice (LPEX), École de Kinésiologie et des Sciences de l'Activité physique, Faculté de Médecine, Université de Montréal, CEPSUM, 2100, boulevard Édouard Montpetit, Montréal, QC, H3C 3J7, Canada.,Research Center, Sainte-Justine University Health Center, Montreal, Quebec, Canada
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9
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Shenkman BS, Zinovyeva OE, Belova SP, Mirzoev TM, Vilchinskaya NA, Vikhlyantsev IM, Ulanova AD, Turtikova OV, Samkhaeva ND, Parfenov VA, Barinov AN, Nemirovskaya TL. Cellular and molecular signatures of alcohol-induced myopathy in women. Am J Physiol Endocrinol Metab 2019; 316:E967-E976. [PMID: 30912963 DOI: 10.1152/ajpendo.00513.2018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Alcoholic myopathy is characterized by the reduction in cross-sectional area (CSA) of muscle fibers and impaired anabolic signaling. The goal of the current study was to investigate the causes and compare the changes in CSA and fiber type composition with the modifications of anabolic and catabolic signaling pathways at the early stages of chronic alcohol consumption in women. Skeletal muscle samples from 5 female patients with alcohol abuse (AL; 43 ± 5 yr old; alcohol abuse duration 5,6 ± 0,6 yr) were compared with the muscle from the control group of 8 healthy women (C; 35 ± 4 yr old). The average daily dose of alcohol consumption was 110 ± 10 ml of pure ethanol. In women patients, a significant decrease in CSA of type I and II muscle fibers, titin and nebulin content, plasma IGF-1 level and total IRS-1, p-Akt and p-4E-BP1 in vastus lateralis was found in comparison with the control group. The p-AMPK level was found to be increased versus the control group. In women patients with chronic alcoholic myopathy 1) both fast and slow muscle fibers are subjected to atrophy; 2) impairments in IGF-I-dependent signaling and pathways controlling translation initiation (AMPK/mTOR/4E-BP1), but not translation elongation, are observed; 3) the level of calpain-1 and ubiquitinated proteins increases, unlike E3 ligases content.
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Affiliation(s)
| | - Olga E Zinovyeva
- Sechenov First Moscow State Medical University, Russian Ministry of Health , Moscow , Russia
| | | | | | | | - Ivan M Vikhlyantsev
- Institute of Theoretical and Experimental Biophysics , Pushchino , Russia
- Pushchino State Institute of Natural Science , Pushchino , Russia
| | - Anna D Ulanova
- Institute of Theoretical and Experimental Biophysics , Pushchino , Russia
- Pushchino State Institute of Natural Science , Pushchino , Russia
| | | | - Nudlya D Samkhaeva
- Sechenov First Moscow State Medical University, Russian Ministry of Health , Moscow , Russia
| | - Vladimir A Parfenov
- Sechenov First Moscow State Medical University, Russian Ministry of Health , Moscow , Russia
| | - Alexey N Barinov
- Sechenov First Moscow State Medical University, Russian Ministry of Health , Moscow , Russia
- Interventional Medicine Aсademy, Moscow , Russia
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10
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Yakupova EI, Vikhlyantsev IM, Lobanov MY, Galzitskaya OV, Bobylev AG. Amyloid Properties of Titin. BIOCHEMISTRY (MOSCOW) 2018. [PMID: 29523065 DOI: 10.1134/s0006297917130077] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This review considers data on structural and functional features of titin, on the role of this protein in determination of mechanical properties of sarcomeres, and on specific features of regulation of the stiffness and elasticity of its molecules, amyloid aggregation of this protein in vitro, and possibilities of formation of intramolecular amyloid structure in vivo. Molecular mechanisms are described of protection of titin against aggregation in muscle cells. Based on the data analysis, it is supposed that titin and the formed by it elastic filaments have features of amyloid.
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Affiliation(s)
- E I Yakupova
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region, 142290, Russia.
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11
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Gritsyna YV, Salmov NN, Bobylev AG, Ulanova AD, Kukushkin NI, Podlubnaya ZA, Vikhlyantsev IM. Increased Autolysis ofμ-Calpain in Skeletal Muscles of Chronic Alcohol-Fed Rats. Alcohol Clin Exp Res 2017; 41:1686-1694. [DOI: 10.1111/acer.13476] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Accepted: 08/04/2017] [Indexed: 01/31/2023]
Affiliation(s)
- Yulia V. Gritsyna
- Laboratory of Structure and Functions of Muscle Proteins; Institute of Theoretical and Experimental Biophysics; Russian Academy of Sciences; Pushchino Russia
| | - Nikolay N. Salmov
- Laboratory of Structure and Functions of Muscle Proteins; Institute of Theoretical and Experimental Biophysics; Russian Academy of Sciences; Pushchino Russia
| | - Alexander G. Bobylev
- Laboratory of Structure and Functions of Muscle Proteins; Institute of Theoretical and Experimental Biophysics; Russian Academy of Sciences; Pushchino Russia
- Pushchino State Institute of Natural Science; Pushchino Russia
| | - Anna D. Ulanova
- Laboratory of Structure and Functions of Muscle Proteins; Institute of Theoretical and Experimental Biophysics; Russian Academy of Sciences; Pushchino Russia
- Pushchino State Institute of Natural Science; Pushchino Russia
| | - Nikolay I. Kukushkin
- Laboratory of Cell Cultures and Cell Engineering; Institute of Cell Biophysics; Russian Academy of Sciences; Pushchino Russia
| | - Zoya A. Podlubnaya
- Laboratory of Structure and Functions of Muscle Proteins; Institute of Theoretical and Experimental Biophysics; Russian Academy of Sciences; Pushchino Russia
- Pushchino State Institute of Natural Science; Pushchino Russia
| | - Ivan M. Vikhlyantsev
- Laboratory of Structure and Functions of Muscle Proteins; Institute of Theoretical and Experimental Biophysics; Russian Academy of Sciences; Pushchino Russia
- Pushchino State Institute of Natural Science; Pushchino Russia
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12
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Stebbings GK, Williams AG, Herbert AJ, Lockey SJ, Heffernan SM, Erskine RM, Morse CI, Day SH. TTN
genotype is associated with fascicle length and marathon running performance. Scand J Med Sci Sports 2017; 28:400-406. [DOI: 10.1111/sms.12927] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/30/2017] [Indexed: 01/10/2023]
Affiliation(s)
- G. K. Stebbings
- MMU Sports Genomics Laboratory; Department of Exercise and Sport Science; Manchester Metropolitan University; Crewe UK
| | - A. G. Williams
- MMU Sports Genomics Laboratory; Department of Exercise and Sport Science; Manchester Metropolitan University; Crewe UK
- Institute of Sport, Exercise and Health; University College London; London UK
| | - A. J. Herbert
- MMU Sports Genomics Laboratory; Department of Exercise and Sport Science; Manchester Metropolitan University; Crewe UK
| | - S. J. Lockey
- MMU Sports Genomics Laboratory; Department of Exercise and Sport Science; Manchester Metropolitan University; Crewe UK
- School of Medical Education; Newcastle University; Newcastle upon Tyne UK
| | - S. M. Heffernan
- MMU Sports Genomics Laboratory; Department of Exercise and Sport Science; Manchester Metropolitan University; Crewe UK
| | - R. M. Erskine
- Institute of Sport, Exercise and Health; University College London; London UK
- School of Sport and Exercise Sciences; Liverpool John Moores University; Liverpool UK
| | - C. I. Morse
- MMU Sports Genomics Laboratory; Department of Exercise and Sport Science; Manchester Metropolitan University; Crewe UK
| | - S. H. Day
- MMU Sports Genomics Laboratory; Department of Exercise and Sport Science; Manchester Metropolitan University; Crewe UK
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13
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Vikhlyantsev IM, Podlubnaya ZA. Nuances of electrophoresis study of titin/connectin. Biophys Rev 2017; 9:189-199. [PMID: 28555301 PMCID: PMC5498330 DOI: 10.1007/s12551-017-0266-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 04/28/2017] [Indexed: 01/03/2023] Open
Abstract
Almost 40 years has passed since the discovery of giant elastic protein titin (also known as connectin) of striated and smooth muscles using gel electrophoresis. Sodium dodecyl sulfate polyacrylamide gel electrophoresis is a major technique for studying the isoform composition and content of titin. This review provides historical insights into the technical aspects of the electrophoresis methods used to identify titin and its isoforms. We particularly focus on the nuances of the technique that improve the preservation of its primary structure so that its high molecular weight isoforms can be visualized.
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Affiliation(s)
- Ivan M Vikhlyantsev
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Institutskaya Street 3, Pushchino, 142290, Russia.
- Pushchino State Institute of Natural Science, Nauki Street 3, Pushchino, 142290, Russia.
| | - Zoya A Podlubnaya
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Institutskaya Street 3, Pushchino, 142290, Russia
- Pushchino State Institute of Natural Science, Nauki Street 3, Pushchino, 142290, Russia
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14
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Patel S, Rauf A, Khan H, Meher BR, Hassan SSU. A holistic review on the autoimmune disease vitiligo with emphasis on the causal factors. Biomed Pharmacother 2017; 92:501-508. [PMID: 28575807 DOI: 10.1016/j.biopha.2017.05.095] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 05/12/2017] [Accepted: 05/22/2017] [Indexed: 12/25/2022] Open
Abstract
Vitiligo is an idiopathic systemic autoimmune disease affecting skin, hair and oral mucosa. This genetic yet acquired disease characterized by melanin loss is a cause of morbidity across all races. Though thyroid disturbance has been recognized as a key trigger of this pathology, an array of other factors plays critical role in its manifestation. Multiple hormones (corticotropin-releasing hormone, adrenocorticotropic hormone, α-melanocyte-stimulating hormone, melatonin, calcitriol, testosterone, estrogen), genes (Human leukocyte antigen (HLA), Cytotoxic T lymphocyte-associated antigen 4 (CTLA-4), Forkhead box D3 (FOXD3), Cluster of differentiation 117 (CD117), Estrogen receptor (ESR) 1, Cyclooxygenase-2 (COX2), Vitiligo-associated protein 1 (VIT1)), and lifestyle choices (stress, diet, cosmetic products, and medications) have been suspected as drivers of this disorder. The pathological mechanisms have been understood in recent times, with the aid of genomic studies; however a universally-effective therapy is yet to be achieved. This review discusses these under-investigated facets of vitiligo onset and progression; hence, it is expected to enrich vitiligo research.
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Affiliation(s)
- Seema Patel
- Bioinformatics and Medical Informatics Research Center, San Diego State University, 5500 Campanile Dr, San Diego, 92182, USA.
| | - Abdur Rauf
- Department of Chemistry, University of Swabi, Anbar, 23561, K.P.K, Pakistan.
| | - Haroon Khan
- Department of Pharmacy, Abdul Wali Khan University, Mardan, 23200, Pakistan
| | - Biswa Ranjan Meher
- Centre for Life Sciences, Central University of Jharkhand, Brambe, Ranchi, 835205, Jharkhand, India
| | - Syed Shams Ul Hassan
- Department of Marine Chemistry and Natural Products, Ocean College, Zhejiang University, Hangzhou, 310058, PR China
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Popova SS, Vikhlyantsev IM, Zakharova NM, Podlubnaya ZA, Fesenko EE. Seasonal changes in proteolytic activity of calpains in striated muscles of long-tailed ground squirrel Spermophilus undulatus. DOKL BIOCHEM BIOPHYS 2017; 472:56-59. [PMID: 28421435 DOI: 10.1134/s1607672917010148] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Indexed: 11/22/2022]
Abstract
Seasonal changes in proteolytic activity and content of calpains in striated muscles of the longtailed ground squirrel Spermophilus undulatus were studied by casein zymography and Western blotting analysis. The results testify to hyperactivation of calpain proteases in the skeletal muscles of awakened animals during the "winter" activity. The observed changes are discussed in the context of adaptation of skeletal muscles of long-tailed ground squirrels to hibernation.
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Affiliation(s)
- S S Popova
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow oblast, 142290, Russia
| | - I M Vikhlyantsev
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow oblast, 142290, Russia. .,Pushchino State Natural Science Institute, Moscow oblast, 142290, Russia.
| | - N M Zakharova
- Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Moscow oblast, 142290, Russia
| | - Z A Podlubnaya
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow oblast, 142290, Russia.,Pushchino State Natural Science Institute, Moscow oblast, 142290, Russia
| | - E E Fesenko
- Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Moscow oblast, 142290, Russia
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16
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Gritsyna YV, Salmov NN, Bobylev AG, Fadeeva IS, Fesenko NI, Sadikova DG, Kukushkin NI, Podlubnaya ZA, Vikhlyantsev IM. Chronic Alcohol Intoxication Is Not Accompanied by an Increase in Calpain Proteolytic Activity in Cardiac Muscle of Rats. BIOCHEMISTRY (MOSCOW) 2017; 82:168-175. [PMID: 28320300 DOI: 10.1134/s0006297917020080] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Enzymatic activity of Ca2+-dependent calpain proteases as well as the content and gene expression of μ-calpain (activated by micromolar calcium ion concentrations), calpastatin (inhibitor of calpains), and titin (substrate for calpains) were investigated in cardiac muscles of rats subjected to chronic alcoholization for 3 and 6 months. There was no increase in the "heart weight/body weight" parameter indicating development of heart hypertrophy in the alcoholized rats, while a decreasing trend was observed for this parameter in the rats after 6-month modeling of alcoholic cardiomyopathy, which indicated development of atrophic changes in the myocardium. Fluorometric measurements conducted using the Calpain Activity Assay Kit did not reveal any changes in total calpain activity in protein extracts of cardiac muscles of the rats alcoholized for 3 and 6 months. Western blot analysis did not show reliable changes in the contents of μ-calpain and calpastatin, and SDS-PAGE did not reveal any decrease in the titin content in the myocardium of rats after the chronic alcohol intoxication. Autolysis of μ-calpain was also not verified, which could indicate that proteolytic activity of this enzyme in myocardium of chronically alcoholized rats is not enhanced. Using Pro-Q Diamond staining, changes in phosphorylation level of titin were not detected in cardiac muscle of rats after chronic alcoholization during three and six months. A decrease in µ-calpain and calpastatin mRNA content (~1.3-fold, p ≤ 0.01 and ~1.9-fold, p ≤ 0.01, respectively) in the myocardium of rats alcoholized for 3 months and decrease in calpastatin mRNA (~1.4-fold, p ≤ 0.01) in animals alcoholized for 6 months was demonstrated using real-time PCR. These results indicate negative effect of chronic alcohol intoxication on expression of the abovementioned genes.
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Affiliation(s)
- Yu V Gritsyna
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region, 142290, Russia.
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17
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Zhu C, Chen Z, Guo W. Pre-mRNA mis-splicing of sarcomeric genes in heart failure. Biochim Biophys Acta Mol Basis Dis 2016; 1863:2056-2063. [PMID: 27825848 DOI: 10.1016/j.bbadis.2016.11.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Revised: 10/11/2016] [Accepted: 11/01/2016] [Indexed: 12/01/2022]
Abstract
Pre-mRNA splicing is an important biological process that allows production of multiple proteins from a single gene in the genome, and mainly contributes to protein diversity in eukaryotic organisms. Alternative splicing is commonly governed by RNA binding proteins to meet the ever-changing demands of the cell. However, the mis-splicing may lead to human diseases. In the heart of human, mis-regulation of alternative splicing has been associated with heart failure. In this short review, we focus on alternative splicing of sarcomeric genes and review mis-splicing related heart failure with relatively well studied Sarcomeric genes and splicing mechanisms with identified regulatory factors. The perspective of alternative splicing based therapeutic strategies in heart failure has also been discussed.
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Affiliation(s)
- Chaoqun Zhu
- Animal Science, College of Agriculture and Natural Resources, University of Wyoming, Laramie, WY 82071, USA
| | - Zhilong Chen
- Animal Science, College of Agriculture and Natural Resources, University of Wyoming, Laramie, WY 82071, USA; College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Wei Guo
- Animal Science, College of Agriculture and Natural Resources, University of Wyoming, Laramie, WY 82071, USA
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18
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Liu JS, Fan LL, Zhang H, Liu X, Huang H, Tao LJ, Xia K, Xiang R. Whole-Exome Sequencing Identifies Two Novel TTN Mutations in Chinese Families with Dilated Cardiomyopathy. Cardiology 2016; 136:10-14. [PMID: 27544385 DOI: 10.1159/000447422] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 06/03/2016] [Indexed: 11/19/2022]
Abstract
OBJECTIVES Dilated cardiomyopathy (DCM) is a leading cause of sudden cardiac death. So far, only 127 mutations of Titin(TTN) have been reported in patients with different phenotypes such as isolated cardiomyopathies, purely skeletal muscle phenotypes or complex overlapping disorders of muscles. METHODS We applied whole-exome sequencing (WES) to investigate cardiomyopathy patients and a cardiomyopathy-related gene-filtering strategy was used to analyze the disease-causing mutations. Sanger sequencing was applied to confirm the mutation cosegregation in the affected families. RESULTS A nonsense mutation (c.12325C>T/p.R4109X) and a missense mutation (c.17755G>C/p.G5919R) of TTN were identified in 2 Chinese DCM families, respectively. Both mutations were cosegregated in all affected members of both families. The nonsense mutation is predicted to result in a truncated TTN protein and the missense mutation leads to a substitution of glycine by arginine. Both variants may cause the structure changes of titin protein. CONCLUSIONS We employed WES to detect the mutations of DCM patients and identified 2 novel mutations. Our study expands the spectrum of TTN mutations and offers accurate genetic testing information for DCM patients who are still clinically negative.
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Affiliation(s)
- Ji-Shi Liu
- The State Key Laboratory of Medical Genetics and School of Life Sciences, Central South University, Changsha, China
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19
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das Neves MF, Dos Reis MCR, de Andrade EAF, Lima FPS, Nicolau RA, Arisawa EÂL, Andrade AO, Lima MO. Effects of low-level laser therapy (LLLT 808 nm) on lower limb spastic muscle activity in chronic stroke patients. Lasers Med Sci 2016; 31:1293-300. [PMID: 27299571 DOI: 10.1007/s10103-016-1968-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Accepted: 05/23/2016] [Indexed: 10/21/2022]
Abstract
A cerebrovascular accident (CVA) may affect basic motor functions, including spasticity that may be present in the upper extremity and/or the lower extremity, post-stroke. Spasticity causes pain, muscle force reduction, and decreases the time to onset of muscle fatigue. Several therapeutic resources have been employed to treat CVA to promote functional recovery. The clinical use of low-level laser therapy (LLLT) for rehabilitation of muscular disorders has provided better muscle responses. Thus, the aim of this study was to evaluate the effect of the application of LLLT in spastic muscles in patients with spasticity post-CVA. A double-blind clinical trial was conducted with 15 volunteer stroke patients who presented with post-stroke spasticity. Both males and females were treated; the average age was 51.5 ± 11.8 years old; the participants entered the study ranging from 11 to 48 months post-stroke onset. The patients participated in three consecutive phases (control, placebo, and real LLLT), in which all tests of isometric endurance of their hemiparetic lower limb were performed. LLLT (diode laser, 100 mW 808 nm, beam spot area 0.0314 cm(2), 127.39 J/cm(2)/point, 40 s) was applied before isometric endurance. After the real LLLT intervention, we observed significant reduction in the visual analogue scale for pain intensity (p = 0.0038), increased time to onset of muscle fatigue (p = 0.0063), and increased torque peak (p = 0.0076), but no significant change in the root mean square (RMS) value (electric signal in the motor unit during contraction, as obtained with surface electromyography). Our results suggest that the application of LLLT may contribute to increased recruitment of muscle fibers and, hence, to increase the onset time of the spastic muscle fatigue, reducing pain intensity in stroke patients with spasticity, as has been observed in healthy subjects and athletes.
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Affiliation(s)
- Marcele Florêncio das Neves
- Universidade do Vale do Paraíba - Laboratório de Engenharia de Reabilotação Sensório Motora, Instituto de Pesquisa e Desenvolvimento, Av. Shishima Hifumi, 2911, Urbanova, São José dos Campos, SP, Brasil.
| | - Mariana César Ribeiro Dos Reis
- Universidade do Vale do Paraíba - Laboratório de Engenharia de Reabilotação Sensório Motora, Instituto de Pesquisa e Desenvolvimento, Av. Shishima Hifumi, 2911, Urbanova, São José dos Campos, SP, Brasil
| | - Eliana Aparecida Fonseca de Andrade
- Universidade do Vale do Paraíba - Laboratório de Engenharia de Reabilotação Sensório Motora, Instituto de Pesquisa e Desenvolvimento, Av. Shishima Hifumi, 2911, Urbanova, São José dos Campos, SP, Brasil
| | - Fernanda Pupio Silva Lima
- Universidade do Vale do Paraíba - Laboratório de Engenharia de Reabilotação Sensório Motora, Instituto de Pesquisa e Desenvolvimento, Av. Shishima Hifumi, 2911, Urbanova, São José dos Campos, SP, Brasil
| | - Renata Amadei Nicolau
- Universidade do Vale do Paraíba, Centro de Laserterapia e Fotobiologia, Instituto de Pesquisa e Desenvolvimento, São José dos Campos, SP, Brasil
| | - Emília Ângela Loschiavo Arisawa
- Universidade do Vale do Paraíba, Laboratório de Espectroscopia Vibracional Biomédica, Instituto de Pesquisa e Desenvolvimento, São José dos Campos, SP, Brasil
| | | | - Mário Oliveira Lima
- Universidade do Vale do Paraíba - Laboratório de Engenharia de Reabilotação Sensório Motora, Instituto de Pesquisa e Desenvolvimento, Av. Shishima Hifumi, 2911, Urbanova, São José dos Campos, SP, Brasil
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20
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Smooth muscle titin forms in vitro amyloid aggregates. Biosci Rep 2016; 36:BSR20160066. [PMID: 27129292 PMCID: PMC5293577 DOI: 10.1042/bsr20160066] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 04/01/2016] [Indexed: 01/07/2023] Open
Abstract
Amyloids are insoluble fibrous protein aggregates, and their accumulation is associated with amyloidosis and many neurodegenerative diseases, including Alzheimer's disease. In the present study, we report that smooth muscle titin (SMT; 500 kDa) from chicken gizzard forms amyloid aggregates in vitro. This conclusion is supported by EM data, fluorescence analysis using thioflavin T (ThT), Congo red (CR) spectroscopy and X-ray diffraction. Our dynamic light scattering (DLS) data show that titin forms in vitro amyloid aggregates with a hydrodynamic radius (Rh) of approximately 700–4500 nm. The initial titin aggregates with Rh approximately 700 nm were observed beyond first 20 min its aggregation that shows a high rate of amyloid formation by this protein. We also showed using confocal microscopy the cytotoxic effect of SMT amyloid aggregates on smooth muscle cells from bovine aorta. This effect involves the disorganization of the actin cytoskeleton and result is cell damage. Cumulatively, our results indicate that titin may be involved in generation of amyloidosis in smooth muscles.
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21
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Salmov NN, Vikhlyantsev IM, Ulanova AD, Gritsyna YV, Bobylev AG, Saveljev AP, Makariushchenko VV, Maksudov GY, Podlubnaya ZA. Seasonal changes in isoform composition of giant proteins of thick and thin filaments and titin (connectin) phosphorylation level in striated muscles of bears (Ursidae, Mammalia). BIOCHEMISTRY (MOSCOW) 2015; 80:343-55. [PMID: 25761688 DOI: 10.1134/s0006297915030098] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Seasonal changes in the isoform composition of thick and thin filament proteins (titin, myosin heavy chains (MyHCs), nebulin), as well as in the phosphorylation level of titin in striated muscles of brown bear (Ursus arctos) and hibernating Himalayan black bear (Ursus thibetanus ussuricus) were studied. We found that the changes that lead to skeletal muscle atrophy in bears during hibernation are not accompanied by a decrease in the content of nebulin and intact titin-1 (T1) isoforms. However, a decrease (2.1-3.4-fold) in the content of T2 fragments of titin was observed in bear skeletal muscles (m. gastrocnemius, m. longissimus dorsi, m. biceps) during hibernation. The content of the stiffer N2B titin isoform was observed to increase relative to the content of its more compliant N2BA isoform in the left ventricles of hibernating bears. At the same time, in spite of the absence of decrease in the total content of T1 in the myocardium of hibernating brown bear, the content of T2 fragments decreased ~1.6-fold. The level of titin phosphorylation only slightly increased in the cardiac muscle of hibernating brown bear. In the skeletal muscles of brown bear, the level of titin phosphorylation did not vary between seasons. However, changes in the composition of MyHCs aimed at increasing the content of slow (I) and decreasing the content of fast (IIa) isoforms of this protein during hibernation of brown bear were detected. Content of MyHCs I and IIa in the skeletal muscles of hibernating Himalayan black bear corresponded to that in the skeletal muscles of hibernating brown bear.
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Affiliation(s)
- N N Salmov
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region, 142290, Russia.
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22
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Salmov NN, Gritsyna YV, Ulanova AD, Vikhlyantsev IM, Podlubnaya ZA. On the role of titin phosphorylation in the development of muscular atrophy. Biophysics (Nagoya-shi) 2015. [DOI: 10.1134/s0006350915040193] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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23
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24
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Ulanova A, Gritsyna Y, Vikhlyantsev I, Salmov N, Bobylev A, Abdusalamova Z, Rogachevsky V, Shenkman B, Podlubnaya Z. Isoform composition and gene expression of thick and thin filament proteins in striated muscles of mice after 30-day space flight. BIOMED RESEARCH INTERNATIONAL 2015; 2015:104735. [PMID: 25664316 PMCID: PMC4312622 DOI: 10.1155/2015/104735] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Revised: 12/11/2014] [Accepted: 12/20/2014] [Indexed: 11/18/2022]
Abstract
Changes in isoform composition, gene expression of titin and nebulin, and isoform composition of myosin heavy chains as well as changes in titin phosphorylation level in skeletal (m. gastrocnemius, m. tibialis anterior, and m. psoas) and cardiac muscles of mice were studied after a 30-day-long space flight onboard the Russian spacecraft "BION-M" number 1. A muscle fibre-type shift from slow-to-fast and a decrease in the content of titin and nebulin in the skeletal muscles of animals from "Flight" group was found. Using Pro-Q Diamond staining, an ~3-fold increase in the phosphorylation level of titin in m. gastrocnemius of mice from the "Flight" group was detected. The content of titin and its phosphorylation level in the cardiac muscle of mice from "Flight" and "Control" groups did not differ; nevertheless an increase (2.2 times) in titin gene expression in the myocardium of flight animals was found. The observed changes are discussed in the context of their role in the contractile activity of striated muscles of mice under conditions of weightlessness.
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Affiliation(s)
- Anna Ulanova
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Institutskaya Street 3, Pushchino 142290, Russia
- Pushchino State Institute of Natural Science, Nauki Street 3, Pushchino 142290, Russia
| | - Yulia Gritsyna
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Institutskaya Street 3, Pushchino 142290, Russia
| | - Ivan Vikhlyantsev
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Institutskaya Street 3, Pushchino 142290, Russia
| | - Nikolay Salmov
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Institutskaya Street 3, Pushchino 142290, Russia
| | - Alexander Bobylev
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Institutskaya Street 3, Pushchino 142290, Russia
| | - Zarema Abdusalamova
- Dagestan State University, Gadzhieva Street 43a, Makhachkala, Republic of Dagestan 367000, Russia
| | - Vadim Rogachevsky
- Institute of Cell Biophysics, Russian Academy of Sciences, Institutskaya Street 3, Pushchino 142290, Russia
| | - Boris Shenkman
- SRC, Institute for Biomedical Problems, Russian Academy of Sciences, Khoroshevskoye Street 76A, Moscow 123007, Russia
| | - Zoya Podlubnaya
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Institutskaya Street 3, Pushchino 142290, Russia
- Pushchino State Institute of Natural Science, Nauki Street 3, Pushchino 142290, Russia
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25
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Chauveau C, Rowell J, Ferreiro A. A rising titan: TTN review and mutation update. Hum Mutat 2014; 35:1046-59. [PMID: 24980681 DOI: 10.1002/humu.22611] [Citation(s) in RCA: 171] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Accepted: 06/20/2014] [Indexed: 01/10/2023]
Abstract
The 364 exon TTN gene encodes titin (TTN), the largest known protein, which plays key structural, developmental, mechanical, and regulatory roles in cardiac and skeletal muscles. Prior to next-generation sequencing (NGS), routine analysis of the whole TTN gene was impossible due to its giant size and complexity. Thus, only a few TTN mutations had been reported and the general incidence and spectrum of titinopathies was significantly underestimated. In the last months, due to the widespread use of NGS, TTN is emerging as a major gene in human-inherited disease. So far, 127 TTN disease-causing mutations have been reported in patients with at least 10 different conditions, including isolated cardiomyopathies, purely skeletal muscle phenotypes, or infantile diseases affecting both types of striated muscles. However, the identification of TTN variants in virtually every individual from control populations, as well as the multiplicity of TTN isoforms and reference sequences used, stress the difficulties in assessing the relevance, inheritance, and correlation with the phenotype of TTN sequence changes. In this review, we provide the first comprehensive update of the TTN mutations reported and discuss their distribution, molecular mechanisms, associated phenotypes, transmission pattern, and phenotype-genotype correlations, alongside with their implications for basic research and for human health.
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Affiliation(s)
- Claire Chauveau
- Inserm, U787 Myology Group, Institut de Myologie, Groupe Hospitalier Pitié-Salpêtrière, Paris, France; UPMC, UMR787, Paris, France
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26
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Gritsyna YV, Salmov NN, Vikhlyantsev IM, Ulanova AD, Sharapov MG, Teplova VV, Podlubnaya ZA. Changes in gene expression and titin (connectin) content in striated muscles of chronically alcoholized rats. Mol Biol 2013. [DOI: 10.1134/s0026893313060058] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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27
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Vikhlyantsev IM, Okuneva AD, Shumilina UV, Salmov NN, Bobylev AG, Molochkov NV, Podlubnaya ZA. Method for isolation of intact titin (connectin) molecules from mammalian cardiac muscle. BIOCHEMISTRY (MOSCOW) 2013; 78:455-62. [PMID: 23848147 DOI: 10.1134/s0006297913050039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Cardiac titin was isolated from rabbit and ground squirrel ventricular muscles by a method that was used earlier to obtain myofibrils with intact minor proteins located in A-bands of sarcomeres (Podlubnaya, Z. A., et al. (1989) J. Mol. Biol., 210, 655-658). Small pieces of cardiac muscle were incubated for 2-3 weeks at 4°C in Ca²⁺-depleting solution before their homogenization to decrease activity of Ca²⁺-dependent proteases. Then the muscle was homogenized, and titin was isolated by the method of Soteriou, A., et al. (1993) J. Cell Sci., 14, 119-123. In control experiments, titin was isolated from cardiac muscle without its preincubation in Ca²⁺-depleting solution. Sometimes control titin preparations contained only T2-fragment, but generally they contained ~5-20% N2B-isoform of titin along with its T2-fragment. Preparations of titin obtained from rabbit cardiac muscle by our method contained ~30-50% of N2BA- and N2B-titin isoforms along with its T2-fragment. The content of α-structures in titin isolated by our method was increased. Actomyosin ATPase activity in vitro increased in the presence of titin preparations containing more intact molecules. This result confirms the significant role of titin in the regulation of actin-myosin interaction in muscles. The method used by us to preserve titin might be used for isolation of other proteins that are substrates of Ca²⁺-dependent proteases.
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Affiliation(s)
- I M Vikhlyantsev
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, 142290 Pushchino, Moscow Region, Russia.
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