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Pearsall RS, Davies MV, Cannell M, Li J, Widrick J, Mulivor AW, Wallner S, Troy ME, Spaits M, Liharska K, Sako D, Castonguay R, Keates S, Grinberg AV, Suragani RNVS, Kumar R. Follistatin-based ligand trap ACE-083 induces localized hypertrophy of skeletal muscle with functional improvement in models of neuromuscular disease. Sci Rep 2019; 9:11392. [PMID: 31388039 PMCID: PMC6684588 DOI: 10.1038/s41598-019-47818-w] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 07/17/2019] [Indexed: 12/13/2022] Open
Abstract
Skeletal muscle is under inhibitory homeostatic regulation by multiple ligands of the transforming growth factor-β (TGFβ) superfamily. Follistatin is a secreted protein that promotes muscle growth and function by sequestering these ligands extracellularly. In the present study, we evaluated the potential of ACE-083 – a locally acting, follistatin-based fusion protein – as a novel therapeutic agent for focal or asymmetric myopathies. Characterization of ACE-083 in vitro revealed its high affinity for heparin and extracellular matrix while surface plasmon resonance and cell-based assays confirmed that ACE-083 binds and potently neutralizes myostatin, activin A, activin B and growth differentiation factor 11 (GDF11). Intramuscular administration of ACE-083 caused localized, dose-dependent hypertrophy of the injected muscle in wild-type mice and mouse models of Charcot-Marie-Tooth disease (CMT) and Duchenne muscular dystrophy, with no evidence of systemic muscle effects or endocrine perturbation. Importantly, ACE-083 also increased the force of isometric contraction in situ by the injected tibialis anterior muscle in wild-type mice and disease models and increased ankle dorsiflexion torque in CMT mice. Our results demonstrate the potential of ACE-083 as a therapeutic agent for patients with CMT, muscular dystrophy and other disorders with focal or asymmetric muscle atrophy or weakness.
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Affiliation(s)
| | | | - M Cannell
- Acceleron Pharma, Cambridge, MA, USA
| | - J Li
- Acceleron Pharma, Cambridge, MA, USA
| | - J Widrick
- Division of Genetics and Genomics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - A W Mulivor
- Acceleron Pharma, Cambridge, MA, USA.,The Hospital for Sick Children, Toronto, Ontario, Canada
| | - S Wallner
- Acceleron Pharma, Cambridge, MA, USA.,NovaRock Biotherapeutics, Princeton, NJ, USA
| | - M E Troy
- Acceleron Pharma, Cambridge, MA, USA
| | - M Spaits
- Acceleron Pharma, Cambridge, MA, USA
| | - K Liharska
- Acceleron Pharma, Cambridge, MA, USA.,Dragonfly Therapeutics, Waltham, MA, USA
| | - D Sako
- Acceleron Pharma, Cambridge, MA, USA
| | | | - S Keates
- Acceleron Pharma, Cambridge, MA, USA
| | - A V Grinberg
- Acceleron Pharma, Cambridge, MA, USA.,Dragonfly Therapeutics, Waltham, MA, USA
| | | | - R Kumar
- Acceleron Pharma, Cambridge, MA, USA
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Pearsall R, Widrick J, Cotton E, Sako D, Liu J, Davies M, Heveron K, Maguire M, Castonguay R, Krishnan L, Troy M, Liharska K, Steeves R, Strand J, Keefe T, Cannell M, Alimzhanov M, Grinberg A, Kumar R. ACE-083 increases muscle hypertrophy and strength in C57BL/6 mice. Neuromuscul Disord 2015. [DOI: 10.1016/j.nmd.2015.06.123] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Mulivor A, Sako D, Cannell M, Wallner S, Hevron K, Steeves R, Castonguay R, Pearsall R, Kumar R. G.P.205. Neuromuscul Disord 2014. [DOI: 10.1016/j.nmd.2014.06.281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Jayasinghe I, Baddeley D, Kong C, Wehrens X, Cannell M, Soeller C. Nanoscale organization of junctophilin-2 and ryanodine receptors within peripheral couplings of rat ventricular cardiomyocytes. Biophys J 2012; 102:L19-21. [PMID: 22404946 PMCID: PMC3296050 DOI: 10.1016/j.bpj.2012.01.034] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Revised: 12/25/2011] [Accepted: 01/17/2012] [Indexed: 11/26/2022] Open
Abstract
The peripheral distributions of the cardiac ryanodine receptor (RyR) and a junctional protein, junctophilin-2 (JPH2), were examined using single fluorophore localization-based super-resolution microscopy in rat ventricular myocytes. JPH2 was strongly associated with RyR clusters. Estimates of the colocalizing fraction of JPH labeling with RyR was ~90% within 30 nm of RyR clusters. This is comparable to fractions estimated from confocal data (~87%). Similarly, most RyRs were associated with JPH2 labeling in super-resolution images (~81% within 30 nm of JPH2 clusters). The shape of associated RyR clusters and JPH2 clusters were very similar, but not identical, suggesting that JPH2 is dispersed throughout RyR clusters and that the packing of JPH2 into junctions and the assembly of RyR clusters are tightly linked.
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Affiliation(s)
- Izzy Jayasinghe
- Department of Physiology, School of Medical Sciences, University of Auckland, Auckland, New Zealand
- School of Biomedical Sciences, University of Queensland, Brisbane, Australia
| | - David Baddeley
- Department of Physiology, School of Medical Sciences, University of Auckland, Auckland, New Zealand
| | - Cherrie H.T. Kong
- Department of Physiology, School of Medical Sciences, University of Auckland, Auckland, New Zealand
| | - Xander H.T. Wehrens
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, Texas
| | - Mark B. Cannell
- Department of Physiology, School of Medical Sciences, University of Auckland, Auckland, New Zealand
- Department of Physiology and Pharmacology, School of Medical Sciences, University of Bristol, Bristol, United Kingdom
| | - Christian Soeller
- Department of Physiology, School of Medical Sciences, University of Auckland, Auckland, New Zealand
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Crossman D, Ruygrok P, Young A, Soeller C, Cannell M. Changes in Dystrophin Labelling of Transverse Tubules are Correlated with Contractile Function in Human Heart Failure. Heart Lung Circ 2012. [DOI: 10.1016/j.hlc.2012.05.190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Crossman D, Young A, Ruygrok P, Cannell M. Designing a Map of Cardiac Function Suitable for MRI Guided Ex Vivo Tissue Sampling. Heart Lung Circ 2011. [DOI: 10.1016/j.hlc.2011.05.157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Rasco-Gaunt S, Riley A, Cannell M, Barcelo P, Lazzeri PA. Procedures allowing the transformation of a range of European elite wheat (Triticum aestivum L.) varieties via particle bombardment. J Exp Bot 2001; 52:865-874. [PMID: 11413224 DOI: 10.1093/jexbot/52.357.865] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Ten current European wheat varieties were transformed at efficiencies ranging from 1-17% (mean 4% across varieties) following modifications in particle bombardment and tissue culture procedures. All plants surviving phosphinothricin selection were screened for uidA and bar gene activity, and for the presence of marker gene sequences by PCR analysis. A minimum of 35% plant 'escape' frequency was achieved with selection on 4 mg l(-1) gluphosinate ammonium after shoot initiation. Mean co-transformation frequency with various genes-of-interest was 66%. The estimated number of insertions of the uidA gene in 25 lines were; 1-2 in 32%, 3-5 in 52%, and 6-8 in 16% of lines. In T(1) progenies, marker genes segregated in a Mendelian fashion in 50% of 39 lines analysed, as determined by transgene activity assays. Based on PCR analysis, it appeared that in some lines the occurrence of distorted segregation was due to poor transmission of the transgenes.
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Affiliation(s)
- S Rasco-Gaunt
- Biochemistry and Physiology Department, IACR-Rothamsted, Harpenden, Hertfordshire AL5 2JQ, UK.
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Cannell M. Idiopathic demyelinating neuropathy. Br Homeopath J 2000; 89:29-32. [PMID: 10703908 DOI: 10.1054/homp.1999.0342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
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Cannell M. Boy with hyperactivity and clumsiness. Br Homeopath J 2000; 89:32-5. [PMID: 10703909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
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Abstract
Force development and fura-2 fluorescence were simultaneously measured in the rabbit inferior vena cava. Discharging SR Ca2+ with either caffeine or norepinephrine prior to stimulation of Ca2+ influx induced a delay of 30-70 s between the intracellular Ca2+ signal and development of force. This delay was abolished by the application of caffeine. These data support the superficial buffer barrier hypothesis, which holds that Ca2+ entry from the extracellular space proceeds via a restricted cytoplasmic region between the inner plasmalemmal surface and the peripheral sarcoplasmic reticulum (SR). Ca2+ accumulation by this SR fraction appears to be able to delay Ca2+ entry into the deeper myoplasm where it activates the myofilaments. Caffeine and thapsigargin elevated the steady-state [Ca2+]i, suggesting a contribution by the SR Ca2+ pump to Ca2+ extrusion from the cells. Norepinephrine enhanced myofilament Ca2+ sensitivity, while caffeine decreased it.
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Affiliation(s)
- Q Chen
- Department of Molecular and Cellular Pharmacology, University of Miami School of Medicine, FL 33101
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Laskey RE, Adams DJ, Cannell M, van Breemen C. Calcium entry-dependent oscillations of cytoplasmic calcium concentration in cultured endothelial cell monolayers. Proc Natl Acad Sci U S A 1992; 89:1690-4. [PMID: 1542661 PMCID: PMC48518 DOI: 10.1073/pnas.89.5.1690] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Bovine endothelial cell monolayers grown to confluence and stimulated with bradykinin responded with periodic fluctuations in intracellular Ca2+ concentration ([Ca2+]i) when exposed to K(+)-free Hepes-buffered saline. The fluctuations in [Ca2+]i measured with fura-2 were synchronized among the population of cells observed and were sensitive to extracellular Ca2+ concentration ([Ca2+]o). Thapsigargin, which inhibits the endoplasmic reticular Ca2(+)-ATPase, did not inhibit the [Ca2+]i oscillations. Removal of extracellular Ca2+ or inhibition of Ca2+ entry by using La3+ or 1-(beta- [3-(4-methoxyphenyl)proproxy]-4-methoxyphenethyl)-1H-imidazole hydrochloride (SKF 96365) abolished the [Ca2+]i oscillations in endothelial cell monolayers. The fluctuations in [Ca2+]i were therefore dependent on Ca2+ influx rather than Ca2+ mobilization from intracellular stores. Simultaneous measurements of membrane potential (Em) using the potential-sensitive bisoxonol dye bis(1,3-dibutylbarbituric acid)trimethine oxonol [Di-BAC4(3)] and [Ca2+]i using fura-2 showed that Em oscillated at the same frequency as the fluctuations in [Ca2+]i. The peak depolarization signal coincided with the maximum rate of increase in the [Ca2+]i signal. Oscillations in the Em signal were inhibited by removal of Ca2+ or by addition of 1 mM Ni2+ to the external solution. Taken together, these observations suggest that the change in Em is the consequence of oscillatory changes in a membrane conductance that also allows Ca2+ to enter the cell. Oscillations in the DiBAC4(3) signal may reflect a rhythmic entry of Ca2+ through nonselective cation channels.
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Affiliation(s)
- R E Laskey
- Department of Molecular and Cellular Pharmacology, University of Miami School of Medicine, FL 33101
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Cannell M, Parry ML, Carter TR, Konijn NT. The Impact of Climatic Variations on Agriculture:. J Appl Ecol 1989. [DOI: 10.2307/2403735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Abstract
For the human electrocardiogram, the relationship between QT interval and heart rate was examined in conditions where the heart rate was changed at different rates. The QT interval provides a measure of the ventricular action potential duration. For slow changes of heart rate, elicited by mild exercise, the dependence of QT interval on heart rate obtained when the heart rate was rising was the same as that obtained when the heart rate was falling. The QT interval was approximately proportional to 1/(heart rate)1/2. For the rapid transient changes of heart rate associated with respiration, the QT interval was approximately constant, independent of the instantaneous heart rate. For rapid sustained changes of heart rate, elicited by heavy exercise or immersion of the face in cold water, the changes in QT interval lagged behind the heart rate changes. Consequently the dependence of QT interval on heart rate obtained when the heart rate was increasing differed from the dependence obtained during a fall in heart rate. This time dependence of the relationship between QT interval and heart rate is similar to that seen for the relationship between action potential duration and stimulation rate in isolated pieces of mammalian ventricle.
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