Accelerate Healing of Severe Burn Wounds by Mouse Bone Marrow Mesenchymal Stem Cell-Seeded Biodegradable Hydrogel Scaffold Synthesized from Arginine-Based Poly(ester amide) and Chitosan

Endogenous bone marrow-derived mesenchymal stem cells are mobilized to peripheral blood and injured tissues in response to changes in the expression of various growth factors and cytokines in the injured tissues, including substance P (SP), transforming growth factor-beta (TGF-β), and stromal cell-derived factor-1 (SDF-1). SP, TGF-β, and SDF-1 are all known to induce the migration of bone marrow-derived mesenchymal stem cells (BM-MSCs). However, it is not yet clear how these stimuli influence or interact with each other during BM-MSC mobilization. This study used mouse bone marrow-derived mesenchymal stem cell-like ST2 cells and human BM-MSCs to evaluate whether SP, TGF-β, and SDF-1 mutually regulate their respective effects on the mobilization of BM-MSCs. SP pretreatment of ST2 and BM-MSCs impaired their response to TGF-β while the introduction of SP receptor antagonist restored the mobilization of ST2 and BM-MSCs in response to TGF-β. TGF-β pretreatment did not affect the migration of ST2 and BM-MSCs in response to SP, but downregulated their migration in response to SDF-1. SP pretreatment modulated the activation of TGF-β noncanonical pathways in ST2 cells and BM-MSCs, but not canonical pathways. These results suggest that the migration of mesenchymal stem cells is regulated by complex functional interactions between SP, TGF-β, and SDF-1. Thus, understanding the complex functional interactions of these chemotactic stimuli would contribute to ensuring the development of safe and effective combination treatments for the mobilization of BM-MSCs.

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Quercetin Stimulates Bone Marrow Mesenchymal Stem Cell Differentiation through an Estrogen Receptor-Mediated Pathway

BioMed Research International ◽

10.1155/2018/4178021 ◽

2018 ◽

Vol 2018 ◽

pp. 1-11 ◽

Cited By ~ 11

Author(s):

Xin-Gang Pang ◽

Yu Cong ◽

Ni-Rong Bao ◽

Yong-Gang Li ◽

Jian-Ning Zhao

Keyword(s):

Bone Marrow ◽

Estrogen Receptor ◽

Stem Cell ◽

Mesenchymal Stem Cell ◽

Osteogenic Differentiation ◽

Western Blotting ◽

Stem Cell Differentiation ◽

Cell Counting ◽

Mouse Bone Marrow ◽

Alizarin Red

Objectives. The present study aimed to investigate the overall effect of quercetin on mouse bone marrow mesenchymal stem cell (BMSC) proliferation and osteogenic differentiation in vitro. Materials and Methods. BMSCs were treated with different concentrations of quercetin for 6 days. The effects of quercetin on cell proliferation were assessed at predetermined times using Cell Counting Kit-8 (CCK-8) assay. The cells were then treated with quercetin, estrogen, or an estrogen receptor (ER) antagonist (which was also administered in the presence of quercetin or estrogen) for 7 or 21 days. The effects of quercetin on BMSC osteogenic differentiation were analyzed by an alkaline phosphatase (ALP) assay kit, Alizarin Red S staining (ARS), quantitative real-time PCR (qPCR), and western blotting. Results. The CCK-8 and ALP assays and ARS staining showed that quercetin significantly enhanced BMSC proliferation, ALP activity, and extracellular matrix production and mineralization, respectively. The qPCR results indicated that quercetin promoted osterix (OSX), runt-related transcription factor 2 (RUNX2), and osteopontin (OPN) transcription in the presence of osteoinduction medium, and the western blotting results indicated that quercetin enhanced bone morphogenetic protein 2 (BMP2), Smad1, Smad4, RUNX2, OSX, and OPN expression and Smad1 phosphorylation. Treatment with the ER inhibitor ICI182780 blocked the effects of quercetin. Conclusions. Our data demonstrated that quercetin promotes BMSC proliferation and osteogenic differentiation. Quercetin enhances BMP signaling pathway activation and upregulates the expression of downstream genes, such as OSX, RUNX2, and OPN, via the ER.

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Nanocellulose/PEGDA Aerogels with Tunable Poisson’s Ratio Fabricated by Stereolithography for Mouse Bone Marrow Mesenchymal Stem Cell Culture

Nanomaterials ◽

10.3390/nano11030603 ◽

2021 ◽

Vol 11 (3) ◽

pp. 603

Author(s):

Aimin Tang ◽

Jiaoyan Ji ◽

Jiao Li ◽

Wangyu Liu ◽

Jufang Wang ◽

...

Keyword(s):

Tissue Engineering ◽

Bone Marrow ◽

Stem Cell ◽

Mesenchymal Stem Cell ◽

Pore Structure ◽

Poisson’S Ratio ◽

Freeze Drying ◽

Poisson's Ratio ◽

Homogeneous Distribution ◽

Mouse Bone Marrow

In this study, nanocellulose aerogels with a tunable Poisson’s ratio were fabricated. Tissue engineering scaffolds with a tunable Poisson’s ratio may be better able to simulate the mechanical behavior of natural tissues. A mixture of cellulose nanofibers (CNFs) and polyethylene glycol diacrylate (PEGDA) was used as the raw material to prepare CNF/PEGDA aerogels with a multiscale pore structure through a combination of stereolithography (SLA) and freeze-drying. The aerogels were fabricated with a regular macropore network structure and a random and homogeneous distribution of micropores. The macropore structure of the scaffolds could be customized through SLA, which resulted in scaffolds that exhibited one of three different mechanical behaviors: positive Poisson’s ratio (PPR), negative Poisson’s ratio (NPR) or zero Poisson’s ratio (ZPR). Then, the hydrogel scaffolds were transformed into aerogel scaffolds through the freeze-drying method, which endowed the scaffolds with homogeneously distributed micropores. The material ratio and exposure were adjusted to obtain scaffolds with a clear pore structure. Then, the CNF/PEGDA scaffolds with different Poisson’s ratios were subjected to mechanical tests, and their chondrogenic induction characteristics were determined. The NPR scaffold not only provided a good environment for cell growth but also affected mouse bone marrow mesenchymal stem cell (mBMSC) proliferation and chondrogenic induction. Thus, we provide a feasible scheme for the preparation of three-dimensional scaffolds with a multiscale pore structure and tunable Poisson’s ratio, which contributes to cartilage repair in tissue engineering.

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Faculty Opinions recommendation of Bone marrow CD169+ macrophages promote the retention of hematopoietic stem and progenitor cells in the mesenchymal stem cell niche.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.11493958.12528059 ◽

2011 ◽

Author(s):

Devendra Agrawal ◽

Vineet Agrawal

Keyword(s):

Bone Marrow ◽

Stem Cell ◽

Mesenchymal Stem Cell ◽

Progenitor Cells ◽

Stem Cell Niche ◽

Hematopoietic Stem ◽

Stem And Progenitor Cells ◽

Cell Niche

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