alexa Low-level accelerations applied in the absence of weight bearing can enhance trabecular bone formation.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Tissue Science & Engineering

Author(s): Garman R, Gaudette G, Donahue LR, Rubin C, Judex S

Abstract Share this page

Abstract High-frequency whole body vibrations can be osteogenic, but their efficacy appears limited to skeletal segments that are weight bearing and thus subject to the induced load. To determine the anabolic component of this signal, we investigated whether low-level oscillatory displacements, in the absence of weight bearing, are anabolic to skeletal tissue. A loading apparatus, developed to shake specific segments of the murine skeleton without the direct application of deformations to the tissue, was used to subject the left tibia of eight anesthesized adult female C57BL/6J mice to small (0.3 g or 0.6 g) 45 Hz sinusoidal accelerations for 10 min/day, while the right tibia served as an internal control. Video and strain analysis revealed that motions of the apparatus and tibia were well coupled, inducing dynamic cortical deformations of less than three microstrain. After 3 weeks, trabecular metaphyseal bone formation rates and the percentage of mineralizing surfaces (MS/BS) were 88\% and 64\% greater (p < 0.05) in tibiae accelerated at 0.3 g than in their contralateral controls. At 0.6 g, bone formation rates and mineral apposition rates were 66\% and 22\% greater (p < 0.05) in accelerated tibiae. Changes in bone morphology were evident only in the epiphysis, where stimulated tibiae displayed significantly greater cortical area (+8\%) and thickness (+8\%). These results suggest that tiny acceleratory motions--independent of direct loading of the matrix--can influence bone formation and bone morphology. If confirmed by clinical studies, the unique nature of the signal may ultimately facilitate the stimulation of skeletal regions that are prone to osteoporosis even in patients that are suffering from confinement to wheelchairs, bed rest, or space travel. (c) 2007 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. This article was published in J Orthop Res and referenced in Journal of Tissue Science & Engineering

Relevant Expert PPTs

Relevant Speaker PPTs

  • Noelle Mathieu
    Bowel Radiation Injury : Complexity of the Pathophysiology and promise of Cell and Tissue Engineering
    PPT Version | PDF Version
  • Stepan S Dzhimak
    Animal tissue-specific biomolecules influence on rats with cyclophosphamide-induced immunosuppression
    PPT Version | PDF Version
  • Ildiko Molnar
    The role of tissue-specific type 2 5’-deiodinase enzyme activities in Graves’ orbitopathy and systemic sclerosis: a new candidate in thyroid autoimmunity
    PDF Version
  • Abulkhair Beatti
    A new understanding of interferential current energy transfer in tissue
    PPT Version | PDF Version
  • Daisuke Ota
    The clinical outcome of reconstruction with tissue expander for breast cancer patients with mastectomy
    PPT Version | PDF Version
  • Mehmet Ozler
    “Mehmet Ozler-Gulhane-Military-Medical-Academy-Ankara-Turkey-Pinealectomy-Initiates-the-Oxidative-Stress-Response-in-Brain-Tissue-of-Rats-Subject-to-Abdominal-Surgery”
    PPT Version | PDF Version
  • Yosef Yarden
    Classically, the 3’untranslated region (3’UTR) is that region in eukaryotic protein-coding genes from the translation termination codon to the polyA signal. It is transcribed as an integral part of the mRNA encoded by the gene. However, there exists another kind of RNA, which consists of the 3’UTR alone, without all other elements in mRNA such as 5’UTR and coding region. The importance of independent 3’UTR RNA (referred as I3’UTR) was prompted by results of artificially introducing such RNA species into malignant mammalian cells. Since 1991, we found that the middle part of the 3’UTR of the human nuclear factor for interleukin-6 (NF-IL6) or C/EBP gene exerted tumor suppression effect in vivo. Our subsequent studies showed that transfection of C/EBP 3’UTR led to down-regulation of several genes favorable for malignancy and to up-regulation of some genes favorable for phenotypic reversion. Also, it was shown that the sequences near the termini of the C/EBP 3’UTR were important for its tumor suppression activity. Then, the C/EBP 3’UTR was found to directly inhibit the phosphorylation activity of protein kinase CPKC in SMMC-7721, a hepatocarcinoma cell line. Recently, an AU-rich region in the C/EBP 3’UTR was found also to be responsible for its tumor suppression. Recently we have also found evidence that the independent C/EBP 3’UTR RNA is actually exists in human tissues, such as fetal liver and heart, pregnant uterus, senescent fibroblasts etc. Through 1990’s to 2000’s, world scientists found several 3’UTR RNAs that functioned as artificial independent RNAs in cancer cells and resulted in tumor suppression. Interestingly, majority of genes for these RNAs have promoter-like structures in their 3’UTR regions, although the existence of their transcribed products as independent 3’UTR RNAs is still to be confirmed. Our studies indicate that the independent 3’UTR RNA is a novel non-coding RNA species whose function should be the regulation not of the expression of their original mRNA, but of some essential life activities of the cell as a whole.
    PPT Version | PDF Version
  • Kazuo Yano
    Regulatory approval for autologous human cells and tissue products in the United States, the European Union, and Japan
    PPT Version | PDF Version
  • William Lindsey
    Ultra-refined Follicular Unit Transplantation into scar tissue as an alternative to surgical scar revision in hair bearing scalp
    PPT Version | PDF Version
  • Simin Fazelipour
    “Simin Fazelipour-Islamic-Azad-University-Tehran-Medical-Sciences-Branch-Tehran-Iran-evaluation-of-histopathologic-and-histomorphometric-changes-of-adrenal-gland-tissue-following-consumption-of-Methylphenidate-in-male-mice”
    PPT Version | PDF Version
  • Jan O Gordeladze
    Key regulatory junctions stabilizing the osteoblast phenotype: Implications for cell and tissue engineering
    PPT Version | PDF Version
  • Marie Schneider
    Regenerative Potential of Outer Root Sheath Melanocytes in Tissue Grafts
    PPT Version | PDF Version
  • Mirette Hanna
    LOCAL INFLAMMATION IN BREAST TISSUE AND MAMMOGRAPHIC DENSITY AMONG PREMENOPAUSAL AND POSTMENOPAUSAL WOMEN
    PPT Version | PDF Version
  • Scott F Dye
    Current concepts on the etiology and safe treatment of the Patellofemoral pain enigma from a Tissue homeostasis perspective
    PPT Version | PDF Version
  • Monika Heidemarie Seltenhammer
    Detecting highly stabilized cumulative ~35-37kD isoforms of ΔFosB in postmortem human brain tissue samples of the nucleus accumbens (NAc) of chronic opioid abusers
    PPT Version | PDF Version

Recommended Conferences

  • 6th International Conference on Tissue Engineering and Regenerative Medicine
    August 23-24 , 2017 San Francisco, California ,USA
  • 8th International Conference on Tissue Science and Regenerative Medicine
    September 11-12, 2017 Singapore City, singapore
  • 9th Annual Conference on Stem Cell and Regenerative Medicine
    Sep 25-26, 2017 Berlin, Germany
  • 10th World Congress on Stem Cell and Biobanking
    October 23-24, 2017 Osaka, Japan

Relevant Topics

Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

 
© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version
adwords