alexa Progressive increase in conduction velocity across human mesenchymal stem cells is mediated by enhanced electrical coupling.

Journal of Bioengineering and Bioelectronics

Author(s): Pijnappels DA, Schalij MJ, van Tuyn J, Ypey DL, de Vries AA,

Abstract Share this page

Abstract OBJECTIVE: The purpose of the study was to investigate the development of electrical transmission across human adult bone marrow-derived mesenchymal stem cells (hMSCs) during long-term co-incubation with cardiomyocytes (CMCs). METHODS: Neonatal rat CMCs were cultured in multi-electrode array dishes. A conduction block was induced by creating a central acellular channel, yielding two asynchronously beating CMC fields. Enhanced green fluorescent protein (eGFP)-labeled hMSCs from ischemic heart disease patients (n=8), eGFP-labeled hMSCs having RNA interference-mediated connexin43 (Cx43) knockdown (n=6), 1,1'-dioctadecyl-3,3,3',3'-tetramethylindocarbocyanine (Dil)-labeled CMCs (n=6), or no cells (n=9) were seeded in the channel. Assessment of conduction velocity (CV), Cx expression and localization, gap junctional coupling, and intracellular electrical recordings were performed for up to 14 days. RESULTS: Resynchronization of the two CMC fields occurred within 24 h after seeding of hMSCs. CV across hMSCs increased from 1.4+/-0.4 cm/s at day 7 to 3.5+/-0.1 cm/s (p<0.05) at day 14. CV across seeded CMCs was 16.8+/-0.2 cm/s throughout this period. No resynchronization occurred in the absence of seeded cells. Knockdown of Cx43 in hMSCs abolished conduction across the channel completely. Time-dependent increase of CV across hMSCs was associated with increased Cx43 mRNA and protein expression resulting in increased gap junctional coupling. Intracellular recordings in coupled hMSCs showed increased conducted action potential (AP) amplitude, lower resting membrane potential, and decreased duration of conducted AP (p<0.05, day 14 versus day 1). CONCLUSIONS: CV across hMSCs increases progressively after 7 days of co-incubation with CMCs, most likely via improved electrotonic interaction. This is associated with increased Cx43 expression, increased functional gap junctional coupling, and enhanced intercellular electrical coupling between hMSCs and CMCs. This article was published in Cardiovasc Res and referenced in Journal of Bioengineering and Bioelectronics

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
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