Abstract:
:Myocardial infarction is a major public health problem that causes significant mortality despite recent advances in its prevention and treatment. Therefore, approaches based on adult stem cells represent a promising alternative to conventional therapies for this life-threatening condition. Mesenchymal stem cells (MSCs) are self-renewing pluripotent cells that have been isolated from multiple tissues and differentiate to various cell types. Here we have analyzed the capacity of MSCs from human bone marrow (BMSC), adipose tissue (ATSC), and dental pulp (DPSC) to differentiate to cells with a cardiac phenotype. Differentiation of MSCs was induced by long-term co-culture with neonatal rat cardiomyocytes (CMs). Shortly after the establishment of MSC-CM co-cultures, expression of connexin 43 and the cardiac-specific markers troponin I, beta-myosin heavy chain, atrial natriuretic peptide, and alpha-sarcomeric actinin was detected in BMSCs, ATSCs, and DPSCs. Expression of differentiation markers increased over time in the co-cultures, reaching the highest levels at 4 weeks. Translocation of the transcription factors NKX2.5 and GATA4 to the nucleus was observed in all three cultures of MSCs during the differentiation process; moreover, nuclear localization of NKX2.5 and GATA4 correlated with expression of alpha-sarcomeric actinin. These changes were accompanied by an increase in myofibril organization in the resulting CM-like cells as analyzed by electron microscopy. Thus, our results provide novel information regarding the differentiation of tissue-specific MSCs to cardiomyocytes and support the potential use of MSCs in cell-based cardiac therapies.
journal_name
Stem Cells Devjournal_title
Stem cells and developmentauthors
Armiñán A,Gandía C,Bartual M,García-Verdugo JM,Lledó E,Mirabet V,Llop M,Barea J,Montero JA,Sepúlveda Pdoi
10.1089/scd.2008.0292subject
Has Abstractpub_date
2009-07-01 00:00:00pages
907-18issue
6eissn
1547-3287issn
1557-8534journal_volume
18pub_type
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