Abstract:
:Mesenchymal stem cells (MSCs) are a heterogeneous population of cells that proliferate in vitro as plastic-adherent cells, have a fibroblast-like morphology, form colonies in vitro and can differentiate into bone, cartilage and fat cells. The abundance, ease and repeatable access to subcutaneous adipose tissue and the simple isolation procedures provide clear advantages for the use of human adipose tissue-derived mesenchymal stem cells (hASDCs) in clinical applications. We screened microRNAs (miRNAs) that affected the proliferation and survival of hADSCs. Transfection of miR-302d mimic increased cell proliferation and protected cells from oxidant-induced cell death in hADSCs, which was supported by flow-cytometric analysis. miR-302d did not affect the expression of Bcl-2 family members or anti-oxidant molecules. The Nrf2-Keap1 system, which is one of the major mechanisms for the cellular defense against oxidative stress, was not altered by transfection of miR-302d mimic. To identify the target of the miR-302d actions on proliferation and survival of hADSCs, a microarray analysis was performed using miR-302d-overexpressing hADSCs. Real-time PCR analysis showed that transfection of miR-302d mimic inhibited the CDKN1A and CCL5 expression. Downregulation of CDKN1A with a specific siRNA mimicked the effect of miR-302d on hADSCs proliferation, but did not affect miR-302d-induced cell survival. Downregulation of CCL5 protected oxidant-induced cell death as miR-302d, inhibited oxidant-induced reactive oxygen species (ROS) generation and the addition of recombinant CCL5 inhibited the protective action of miR-302d on oxidant-induced cell death. This study indicates that miR-302 controls proliferation and cell survival of hADSCs through different targets and that this miRNA can be used to enhance the therapeutic efficacy of hADSCs transplantation in vivo.
journal_name
Cell Death Disjournal_title
Cell death & diseaseauthors
Kim JY,Shin KK,Lee AL,Kim YS,Park HJ,Park YK,Bae YC,Jung JSdoi
10.1038/cddis.2014.344subject
Has Abstractpub_date
2014-08-21 00:00:00pages
e1385issn
2041-4889pii
cddis2014344journal_volume
5pub_type
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