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Candini, Olivia; Spano, Carlotta; Murgia, Alba; Grisendi, Giulia; Veronesi, Elena; Piccinno, Maria Serena; Ferracin, Manuela; Negrini, Massimo; Giacobbi, Francesca; Bambi, Franco; Horwitz, Edwin Mark; Conte, Pierfranco; Paolucci, Paolo; Dominici, Massimo
Stem cells, March 2015, Letnik: 33, Številka: 3Journal Article
Human aging is associated with a decrease in tissue functions combined with a decline in stem cells frequency and activity followed by a loss of regenerative capacity. The molecular mechanisms behind this senescence remain largely obscure, precluding targeted approaches to counteract aging. Focusing on mesenchymal stromal/stem cells (MSC) as known adult progenitors, we identified a specific switch in miRNA expression during aging, revealing a miR‐196a upregulation which was inversely correlated with MSC proliferation through HOXB7 targeting. A forced HOXB7 expression was associated with an improved cell growth, a reduction of senescence, and an improved osteogenesis linked to a dramatic increase of autocrine basic fibroblast growth factor secretion. These findings, along with the progressive decrease of HOXB7 levels observed during skeletal aging in mice, indicate HOXB7 as a master factor driving progenitors behavior lifetime, providing a better understanding of bone senescence and leading to an optimization of MSC performance. Stem Cells 2015;33:939–950
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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