scholarly journals Activation of transcriptional factor ZBTB16 expression during osteogenic differentiation of mesenchymal stem cells

2021 ◽  
Vol 10 (3) ◽  
pp. 44-55
Author(s):  
D. S. Semenova ◽  
A. M. Kiselev ◽  
A. B. Malashicheva

Aim. Calcified aortic valve stenosis is the third leading cause of cardiovascular disease. The mechanisms underlying this process remain unclear, however, it is known that they are largely similar to the formation of bone tissue during embryonic development, as well as in the postnatal period during regeneration. There is evidence for the             involvement of Zinc Finger and BTB Domain Containing 16 (ZBTB16) in skeletal development. At the same time, a number of studies carried out on different types of cell cultures indicate a contradictory and ambiguous effect of ZBTB16 on RUNX2 expression. Thus, the aim of this study was to investigate the dynamic variability of ZBTB16 expression, as well as its role in aortic valve calcification.Methods. The study used different types of mesenchymal cells cultures - aortic valve interstitial cells, umbilical cord mesenchymal stem cells, ligament stem cells and dental pulp stem cells. Changes in ZBTB16 and RUNX2 expression levels                under the influence of osteogenic stimuli, as well as during exogenous activation of ZBTB16, were analyzed using real-time PCR. Expression levels of some osteogenic markers - BMP2,4, COL1A1, IBSP, DLX2, PDK4 - were analyzed in the interstitial cells of the aortic valve.Results. The results of the study indicate that a significant increase in the expression of ZBTB16 is observed during the induction of osteogenic differentiation of various cell cultures - interstitial cells of the aortic valve, mesenchymal stem cells of           the umbilical cord, stem cells of the ligaments and dental pulp. Apparently, the processes of osteogenic differentiation of aortic valve interstitial cells, in the presence of dexamethasone in cultivation medium, are provided through RUNX2-dependent signaling for the further activation of osteogenic markers.Conclusion. The study of modulation of cellular signals by ZBTB16, when activating or suppressing the work of a transcriptional factor, in the future may bring us closer to the ability to enhance the regenerative abilities of bone tissue cells or, conversely, prevent calcification of the aortic valve tissues.

2022 ◽  
Vol 12 (4) ◽  
pp. 794-799
Author(s):  
Le Chang ◽  
Wei Duan ◽  
Chuang Wang ◽  
Jian Zhang

This study was to determine whether microRNA (miRNA)-126 regulates osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs). Rat BMSCs were extracted and stimulated for osteogenic differentiation. Functional experiments were conducted to assess miR-126’s impact on BMSCs differentiation. Western blot and RT-qPCR determined miR-126 expression. ALP activity detection and alizarin red staining detection were also performed. After osteogenic differentiation of BMSCs, miR-126 expression was gradually decreased over time. Overexpression of miR-26 decreased ALP activity, Notch signaling activity as well as declined Runx2 expression and calcium Salt nodules after treatment. Importantly, we found that Smad4 serves as a target of miR-126 while upregulation of the miRNA was accompanied with the decreased Smad4 protein expression without affecting the Smad4 mRNA level. In conclusion, miR-126 restrains osteogenic differentiation through inhibition of SMAD4 signaling, providing a novel insight into the mechanism.


2019 ◽  
Vol 9 (10) ◽  
pp. 1346-1354
Author(s):  
Jie Chen ◽  
Yongsheng Luo ◽  
Ting Li ◽  
Wenbo Yang ◽  
Wen Zhang ◽  
...  

Exogenous bone marrow mesenchymal stem cells (MSCs) can regulate osteogenic differentiation. MicroRNA-21 has been shown to target SMAD7. This study explored the mechanism by which miR-21/SMAD7 inhibits osteogenic differentiation from exosomes secreted by osteoporosis patients-derived MSCs. Exosomes were obtained from MSCs and miR-21 expression was detected. Normal MSCs were treated with exosomes secreted by MSCs from different sources for osteogenic differentiation followed by detection of ALP, Bglap and Runx2 level and ALP activity. Normal MSCs were divided into three groups, which were treated with exosomes from normal adult MSCs, osteoporosis patients-derived MSCs and osteoporosis patients-derived MSCs + SMAD7 overexpression followed by analysis of the mRNA expression of ALP, Bglap and Runx2 by qRT-PCR and ALP activity. miR-21 expression in exosomes from osteoporosis patients-derived MSCs was significantly higher than that from normal adults MSCs. After treatment with exosomes from osteoporosis patients-derived MSCs, Runx2 expression and ALP activity was significantly decreased. SMAD7 expression in osteoporosis patients was significantly lower than that in normal adults. The expression of ALP, Bglap and Runx2 is significantly decreased after overexpression of SMAD7. SMAD7 is a target gene of miR-21 and plays a role in inhibiting osteogenic differentiation induced by exosomes from osteoporosis-derived MSCs.


2021 ◽  
Vol 12 ◽  
Author(s):  
Fan Zhang ◽  
Naixuan Cheng ◽  
Yingchun Han ◽  
Congcong Zhang ◽  
Haibo Zhang

Calcific aortic valve disease (CAVD) is the most common structural heart disease, and the morbidity is increased with elderly population. Several microRNAs (miRNAs) have been identified to play crucial roles in CAVD, and numerous miRNAs are still waiting to be explored. In this study, the miRNA expression signature in CAVD was analyzed unbiasedly by miRNA-sequencing, and we found that, compared with the normal control valves, 152 miRNAs were upregulated and 186 miRNAs were downregulated in calcified aortic valves. The functions of these differentially expressed miRNAs were associated with cell differentiation, apoptosis, adhesion and immune response processes. Among downregulated miRNAs, the expression level of miR-139-5p was negatively correlated with the osteogenic gene RUNX2, and miR-139-5p was also downregulated during the osteogenic differentiation of primary human aortic valve interstitial cells (VICs). Subsequent functional studies revealed that miR-139-5p overexpression inhibited the osteogenic differentiation of VICs by negatively modulating the expression of pro-osteogenic gene FZD4 and CTNNB1. In conclusion, these results suggest that miR-139-5p plays an important role in osteogenic differentiation of VICs via the Wnt/β-Catenin pathway, which may further provide a new therapeutic target for CAVD.


2017 ◽  
Vol 232 (7) ◽  
pp. 1591-1595 ◽  
Author(s):  
Dinesh Murugan Girija ◽  
Suresh Y Ranga Rao ◽  
Mangathayaru Kalachaveedu ◽  
Rajasekaran Subbarayan

2013 ◽  
Vol 11 (1) ◽  
pp. 611-624 ◽  
Author(s):  
Iolanda D'Alimonte ◽  
Eleonora Nargi ◽  
Angela Lannutti ◽  
Marco Marchisio ◽  
Laura Pierdomenico ◽  
...  

2017 ◽  
Vol 4 (S) ◽  
pp. 80
Author(s):  
Hiew Vun Vun

The combination of mesenchymal stem cells (MSCs) and biomaterials scaffolds hold significant promise in tissue engineering and regenerative medicine field. In recent years, expansion and differentiation of MSCs culturing with polymer-based and graphene-based biomaterials have been intensely studied. However, the underlying molecular mechanisms are still largely unknown. This study was to examine the different characteristics of Wharton’s jelly (WJ)-derived MSCs using two different types of biomaterials including polymer-based (PU157) and graphene oxide-based (GO). In term of proliferation, WJ-MSCs culturing with PU157 and GO showed no significant differences compared to the controls. PU157 and GO had no effects on morphological features of WJ-MSCs. RT-PCR results showed that all WJ-MSCs co-culturing with or without PU157 and GO expressed positive surface markers including CD29, CD44, CD73, CD90, CD105, CD106 and CD166 but the expression of negative markers (CD34, CD45 and CD133) was undetectable. The SOX2 and RUNX2 expression were both upregulated in WJ-MSCs combining with PU157 when compared to the controls at passage 6, where no obvious difference was observed in passage 3. Interestingly, COL2A expression became more noticeable in the presence of PU157 at passage 6 than passage 3. In contrast, GO did not alter the expression of stemness, osteogenic, adipogenic and chondrogenic genes. Both alizarin red and oil red staining showed calcium and lipid deposition in WJ-MSCs co-cultured with PU157 and GO respectively, suggesting the presence of osteoblast- and adipocyte-like cells. In conclusion, PU157 exerted certain effects on the expression gene profiles at later passage and able to enhance differentiation abilities in WJ-MSCs.


2018 ◽  
Vol 9 ◽  
Author(s):  
Maria Bogdanova ◽  
Aleksandra Kostina ◽  
Katarina Zihlavnikova Enayati ◽  
Arsenii Zabirnyk ◽  
Anna Malashicheva ◽  
...  

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