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    Restoring systemic GDF11 levels reverses age-related dysfunction in mouse skeletal muscle (2014)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2014-05-07
    Description: Parabiosis experiments indicate that impaired regeneration in aged mice is reversible by exposure to a young circulation, suggesting that young blood contains humoral "rejuvenating" factors that can restore regenerative function. Here, we demonstrate that the circulating protein growth differentiation factor 11 (GDF11) is a rejuvenating factor for skeletal muscle. Supplementation of systemic GDF11 levels, which normally decline with age, by heterochronic parabiosis or systemic delivery of recombinant protein, reversed functional impairments and restored genomic integrity in aged muscle stem cells (satellite cells). Increased GDF11 levels in aged mice also improved muscle structural and functional features and increased strength and endurance exercise capacity. These data indicate that GDF11 systemically regulates muscle aging and may be therapeutically useful for reversing age-related skeletal muscle and stem cell dysfunction.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4104429/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4104429/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sinha, Manisha -- Jang, Young C -- Oh, Juhyun -- Khong, Danika -- Wu, Elizabeth Y -- Manohar, Rohan -- Miller, Christine -- Regalado, Samuel G -- Loffredo, Francesco S -- Pancoast, James R -- Hirshman, Michael F -- Lebowitz, Jessica -- Shadrach, Jennifer L -- Cerletti, Massimiliano -- Kim, Mi-Jeong -- Serwold, Thomas -- Goodyear, Laurie J -- Rosner, Bernard -- Lee, Richard T -- Wagers, Amy J -- 1DP2 OD004345/OD/NIH HHS/ -- 1R01 AG033053/AG/NIA NIH HHS/ -- 1R01 AG040019/AG/NIA NIH HHS/ -- 5U01 HL100402/HL/NHLBI NIH HHS/ -- DP2 OD004345/OD/NIH HHS/ -- P30 AG038072/AG/NIA NIH HHS/ -- R01 AG032977/AG/NIA NIH HHS/ -- R01 AG033053/AG/NIA NIH HHS/ -- R01 AG040019/AG/NIA NIH HHS/ -- R01 AR042238/AR/NIAMS NIH HHS/ -- R01 AR42238/AR/NIAMS NIH HHS/ -- T32 DE007057/DE/NIDCR NIH HHS/ -- U01 HL100402/HL/NHLBI NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2014 May 9;344(6184):649-52. doi: 10.1126/science.1251152. Epub 2014 May 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Harvard Stem Cell Institute and Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24797481" target="_blank"〉PubMed〈/a〉
    Keywords: Age Factors ; Aging/blood/drug effects/*physiology ; Animals ; Bone Morphogenetic Proteins/administration & dosage/blood/*physiology ; Growth Differentiation Factors/administration & dosage/blood/*physiology ; Male ; Mice ; Mice, Inbred C57BL ; Muscle, Skeletal/*blood supply/drug effects/*physiology ; Myoblasts, Skeletal/drug effects/*physiology ; Parabiosis ; *Regeneration ; *Rejuvenation
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
    Electronic Resource
    Electronic Resource
    High-order methods for elliptic equations with variable coefficientsThis research is supported by the National Science and Engineering Research Council of Canada operating Grants No. 3054 and No. A 5418. (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    Numerical Methods for Partial Differential Equations 3 (1987), S. 219-227 
    Details
    ISSN: 0749-159X
    Keywords: Mathematics and Statistics ; Numerical Methods
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics
    Notes: In this article, we give a simple method for developing finite difference schemes on a uniform square gird. We consider a general, two-dimensional, second-order, partial differential equation with variable coefficients. In the case of a nine-point scheme, we obtain the known results of Young and Dauwalder in a fairly elegant fashion. We show how this can be extended to obtain fourth-order schemes on thirteen points. We derive two such schemes which are attractive because they can be adapted quite easily bnto obtain formulas for gird points near the boundary. In addition to this, these formulas only require nine evaluations for the typical forcing function. Numerical examples are given to demonstrate the performance of one of the fourth-order schemes.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/num.1690030306
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  • 3
    Electronic Resource
    Electronic Resource
    Fourth-order finite difference methods for three-dimensional general linear elliptic problems with variable coefficientsThis research is supported by the National Science and Engineering Council of Canada operating Grants No. A 3050 and No. A 5418. (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    Numerical Methods for Partial Differential Equations 3 (1987), S. 229-240 
    Details
    ISSN: 0749-159X
    Keywords: Mathematics and Statistics ; Numerical Methods
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics
    Notes: In this article, we give a simple method for deriving finite difference schemes on a uniform cubic grid. We consider a general, three-dimensional, second-order, linear, elliptic partial differential equation with variable coefficients. We derive two simple fourth-order schemes. When the coefficients of the second-order mixed derivatives are equal to zero, the fourth-order scheme requires only 19 grid points. When the coefficients of the mixed derivatives are not equal to zero and the coefficients of Uxx, Uyy, and Uzz are equal, we require the 27 points of the cubic grid. Numerical examples are given to demonstrate the performance of the two schemes derived. There does not exist a fourth-order scheme involving 27 grid points for the general case.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/num.1690030307
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    Paper (German National Licenses)
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