scholarly journals Paracrine senescence of human endometrial mesenchymal stem cells: a role for the insulin-like growth factor binding protein 3

Aging ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 1987-2004 ◽  
Author(s):  
Irina Vassilieva ◽  
Vera Kosheverova ◽  
Mikhail Vitte ◽  
Rimma Kamentseva ◽  
Alla Shatrova ◽  
...  
Keyword(s):  
Stem Cells ◽  
Mesenchymal Stem Cells ◽  
Growth Factor ◽  
Binding Protein ◽  
Insulin Like Growth Factor ◽  
Factor Binding

scholarly journals Insulin-Like Growth Factor Binding Protein-6 Alters Skeletal Muscle Differentiation of Human Mesenchymal Stem Cells

2017 ◽  
Vol 2017 ◽  
pp. 1-17 ◽  
Author(s):  
Doaa Aboalola ◽  
Victor K. M. Han
Keyword(s):  
Stem Cells ◽  
Mesenchymal Stem Cells ◽  
Growth Factor ◽  
Human Mesenchymal Stem Cells ◽  
Muscle Cells ◽  
Muscle Differentiation ◽  
Insulin Like Growth Factor ◽  
Differentiation Markers ◽  
Time Points ◽  
Factor Binding

Insulin-like growth factor binding protein-6 (IGFBP-6), the main regulator of insulin-like growth factor-2 (IGF-2), is a component of the stem cell niche in developing muscle cells. However, its role in muscle development has not been clearly defined. In this study, we investigated the role of IGFBP-6 in muscle commitment and differentiation of human mesenchymal stem cells derived from the placenta. We showed that placental mesenchymal stem cells (PMSCs) have the ability to differentiate into muscle cells when exposed to a specific culture medium by expressing muscle markers Pax3/7, MyoD, myogenin, and myosin heavy chain in a stage-dependent manner with the ultimate formation of multinucleated fibers and losing pluripotency-associated markers, OCT4 and SOX2. The addition of IGFBP-6 significantly increased pluripotency-associated markers as well as muscle differentiation markers at earlier time points, but the latter decreased with time. On the other hand, silencing IGFBP-6 decreased both pluripotent and differentiation markers at early time points. The levels of these markers increased as IGFBP-6 levels were restored. These findings indicate that IGFBP-6 influences MSC pluripotency and myogenic differentiation, with more prominent effects observed at the beginning of the differentiation process before muscle commitment.

scholarly journals Age-Related Insulin-Like Growth Factor Binding Protein-4 Overexpression Inhibits Osteogenic Differentiation of Rat Mesenchymal Stem Cells

2017 ◽  
Vol 42 (2) ◽  
pp. 640-650 ◽  
Author(s):  
Jinhui Wu ◽  
Chao Wang ◽  
Xiong Miao ◽  
Yungang Wu ◽  
Jiabin Yuan ◽  
...  
Keyword(s):  
Stem Cells ◽  
Mesenchymal Stem Cells ◽  
Growth Factor ◽  
Osteogenic Differentiation ◽  
Marker Genes ◽  
Insulin Like Growth Factor ◽  
Differentiation Potential ◽  
Factor Binding ◽  
Alp Activity ◽  
Age Related

Background/Aims: Insulin-like growth factor binding proteins (IGFBP) play important roles in bone metabolism. IGFBP4 is involved in senescent-associated phenomena in mesenchymal stem cells (MSCs). The goal of the present study was to determine whether age-related IGFBP4 overexpression is associated with the impaired osteogenic differentiation potential of aged bone marrow derived MSCs. Methods: MSCs were isolated from Sprague-Dawley rats aged 3–26 months. The bone morphogenetic protein (BMP)-2-induced osteogenic differentiation of rat MSCs was assessed by analyzing the expression levels of osteoblast marker genes [runt-related transcription factor 2 (RUNX2), alkaline phosphatase (ALP), and osteocalcin (OC)], ALP activity and calcification. Results: Our study showed that IGFBP4 mRNA and protein expression increased with age in parallel with impaired osteogenic differentiation of MSCs cultured in BMP2-containing osteogenic medium, as evidenced by the downregulation of osteoblast marker genes, and decreased ALP activity and calcium deposits. IGFBP4 overexpression impaired BMP2-induced osteogenic differentiation potential of young MSCs, whereas IGFBP4 knockdown restored the osteogenic potency of aged MSCs. Moreover, IGFBP4 knockdown stimulated the activation of Erk and Smad by increasing phosphorylation. Conclusion: Collectively, our results demonstrate that IGFBP4 overexpression plays a role in the impairment of MSC differentiation potential via the Erk and Smad pathways, suggesting potential targets to improve MSC function for cell therapy applications.

Sign in / Sign up

Export Citation Format

Share Document