• BMB Reports
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• 제57권5호
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• pp.238-243
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• 2024

Bone marrow-derived mesenchymal stem cells (BM-MSCs) can differentiate into endothelial cells in an inflammatory microenvironment. However, the regulatory mechanisms underlying this process are not entirely understood. Here, we found that TIE2 in BM-MSCs was upregulated at the transcriptional level after stimulation with tumor necrosis factor-alpha (TNFα), a major pro-inflammatory cytokine. Additionally, the STAT-binding sequence within the proximal region of TIE2 was necessary for TNFα-induced TIE2 promoter activation. TIE2 and STAT3 knockdown reduced TNFα-induced endothelial tube formation in BM-MSCs. Among the major TNFα-activated MAP kinases (ERK1/2, JNK1/2, and p38 MAPK) in BM-MSCs, only inhibition of the p38 kinase abrogated TNFα-induced TIE2 upregulation by inhibiting the JAK-STAT signaling pathway. These findings suggest that p38 MAP contributes to the endothelial differentiation of BM-MSCs by activating the JAK-STAT-TIE2 signaling axis in the inflammatory microenvironment.

• Clinics in Shoulder and Elbow
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• 제15권2호
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• pp.65-72
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• 2012

목적: 세가지 기원의 줄기 세포 분화능과 면역표현형을 평가하고자 하였다. 대상 및 방법: 견봉하 점액낭과 골수, 탯줄 혈액 세 개의 군에서 세포를 채취하였다. 견봉하 점액낭과 골수는 견관절 수술 환자군에게 임상적 동의 하에 수술중 채취하였다. 각각의 채취된 세포 및 탯줄 혈액에 대하여 계대 배양을 시행하여 신경 분화군, 지방 분화군, 골 분화군을 평가하였으며 세포 표면 항체를 밝히기 위해 유동세포분석법을 이용하였다. 결과: 견봉하 점액낭 유래 세포에서는 신경분화와 지방 분화는 8예 모두 (100%)에서, 골분화는 8례 중 5예 (62.5%)에서 성공할 수 있었으며 골수 유래 세포의 경우 신경 및 지방 분화 유도한 6례 및 5예 모두 (100%) 분화에 성공하였으나 골분화 유도는 5예 중 4예 (80%)에서 얻을 수 있었다. 반면 탯줄 유래 세포 분화 연구의 경우 신경 분화 유도 67례 중 65예 (97%)에서 지방 분화 연구 54예 중 29예 (53.7%)에서 골 분화 연구 57예 중 39예 (68.4%)에서 성공할 수 있었다. 결론: 탯줄 유래 줄기세포의 분화능과 비교하였을 때 견봉하 점액낭 및 골수 유래 줄기세포의 분화능이 우수함을 알 수 있으며 이는 향후 세포 치료에 있어서 안정성 있는 치료 제공자가 될 수 있을 것으로 보이며 향후 생체 실험 연구의 참고 자료로서도 가치가 있을 것으로 보인다.

• Molecules and Cells
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• 제37권9호
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• pp.650-655
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• 2014

Mesenchymal stem cells (MSCs) can differentiate into neural cells to treat nervous system diseases. Magnetic resonance is an ideal means for cell tracking through labeling cells with superparamagnetic iron oxide (SPIO). However, no studies have described the neural differentiation ability of SPIO-labeled MSCs, which is the foundation for cell therapy and cell tracking in vivo. Our results showed that bone marrow-derived mesenchymal stem cells (BM-MSCs) labeled in vitro with SPIO can be induced into neural-like cells without affecting the viability and labeling efficiency. The cellular uptake of SPIO was maintained after labeled BM-MSCs differentiated into neural-like cells, which were the basis for transplanted cells that can be dynamically and non-invasively tracked in vivo by MRI. Moreover, the SPIO-labeled induced neural-like cells showed neural cell morphology and expressed related markers such as NSE, MAP-2. Furthermore, whole-cell patch clamp recording demonstrated that these neural-like cells exhibited electrophysiological properties of neurons. More importantly, there was no significant difference in the cellular viability and $[Ca^{2+}]_i$ between the induced labeled and unlabeled neural-like cells. In this study, we show for the first time that SPIO-labeled MSCs retained their differentiation capacity and could differentiate into neural-like cells with high cell viability and a good cellular state in vitro.

• The Journal of Advanced Prosthodontics
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• 제6권5호
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• pp.351-360
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• 2014

PURPOSE. The aim of present study was to identify characteristic and response of mouse bone marrow (BM) derived low-adherent bone marrow mesenchymal stem cells (BMMSCs) obtained by quantification of extracellular matrix (ECM). MATERIALS AND METHODS. Non-adherent cells acquired by ECM coated dishes were termed low-adherent BMMSCs and these cells were analyzed by in vitro and in vivo methods, including colony forming unit fibroblast (CFU-f), bromodeoxyuridine (BrdU), multi-potential differentiation, flow cytometry and transplantation into nude mouse to measure the bone formation ability of these low-adherent BMMSCs. Titanium (Ti) discs with machined and anodized surfaces were prepared. Adherent and low-adherent BMMSCs were cultured on the Ti discs for testing their proliferation. RESULTS. The amount of CFU-f cells was significantly higher when non-adherent cells were cultured on ECM coated dishes, which was made by 7 days culturing of adherent BMMSCs. Low-adherent BMMSCs had proliferation and differentiation potential as adherent BMMSCs in vitro. The mean amount bone formation of adherent and low-adherent BMMSCs was also investigated in vivo. There was higher cell proliferation appearance in adherent and low-adherent BMMSCs seeded on anodized Ti discs than machined Ti discs by time. CONCLUSION. Low-adherent BMMSCs acquired by ECM from non-adherent cell populations maintained potential characteristic similar to those of the adherent BMMSCs and therefore could be used effectively as adherent BMMSCs in clinic.

• 한국임상수의학회지
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• 제25권6호
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• pp.458-465
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• 2008

The purpose of this study is to characterize canine mesenchymal stem cells (MSCs) derived from bone marrow (BM) for use in research on the applications of stem cells in canine models of development, physiology, and disease. BM was harvested antemortem by aspiration from the greater tubercle of the humerus of 30 normal beagle dogs. Canine BM-derived MSCs were isolated according to methods developed for other species and were characterized based on their morphology, growth traits, cell-surface antigen profiles, differentiation repertoire, immunocytochemistry results, and neurotrophic factor expression in vitro. The canine MSCs exhibited a fibroblast-like morphology with a polygonal or spindle-shaped appearance and long processes; further, their cell-surface antigen profiles were similar to those of their counterparts in other species such as rodents and humans. The canine MSCs could differentiate into osteocytes and neurons on incubation with appropriate induction media. RT-PCR analysis revealed that these cells expressed NGF, bFGF, SDF-1, and VEGF. This study demonstrated that isolating canine MSCs from BM, stem-cell technology can be applied to a large variety of organ dysfunctions caused by degenerative diseases and injuries in dogs. Furthermore, our results indicated that canine MSCs constitutively secrete endogenous factors that enhance neurogenesis and angiogenesis. Therefore, these cells are potentially useful for treating dogs affected with various neurodegenerative diseases and spinal-cord injuries.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제32권6호
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• pp.495-505
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• 2006

In this study we evaluate the effects of bFGF-BB and PDGF on in vitro proliferation, differentiation and mineralization of mesenchymal stem cells (MSCs) from rat. MSCs were prepared from the bone marrow of 6 or 7-week-old male rats with a technique previously described by Maniatopoulos et al. in 1988. Lineage differentiation to osteogenesis, chondrogenesis and adipogenesis were performed. At first, we characterized the cultured cell on passage 1, 3, 5, 7 with immunocytochemical staining using CD29, 44, 34, 45, ${\alpha}$-SMA and type I collagen. And to study the effects of bFGF and PDGF-BB on proliferation, differentiation and mineralization, we seeded the expanded cell at a density of 6 $6{\times}10^3\;cells/cm^2$ to 100-mm dish for evaluation of cell proliferation and MTT assay was carried out on day 2, 4, 7, 9. We also resuspended the cells with same density $(6{\times}10^3\;cells/cm^2)$ to 24 well plates for subculture. On the following day, the attached cells were exposed to 2.5ng/ml bFGF and/or 25ng/ml PDGF-BB daily during 5 days. The osteocalcin (OC) level was assessed and mineral contents were evaluated with alizarin red S staining on subculture day 2, 7, 14, 21. We identified the mesenchymal stem cell from the bone marrow derived cells of rat through their successful multi-differentiation and stable display of its phenotype. And bFGF and PDGF-BB showed the effect that inhibited osteoblastic differentiation and mineralization mildly in above concentration at in vitro culture. This study was supported by grant 04-2004-0120 from the Seoul National University Hospital Research Fund.

• Clinical and Experimental Reproductive Medicine
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• 제46권1호
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• pp.1-7
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• 2019

With the progress of regenerative medicine, mesenchymal stem cells (MSCs) have received attention as a way to restore ovarian function. It has been reported that MSCs derived from bone marrow, adipose, umbilical cord blood, menstrual blood, and amniotic fluid improved ovarian function. In light of previous studies and advances in this field, there are increased expectations regarding the utilization of MSCs to restore ovarian function. This review summarizes recent research into potential applications of MSCs in women with infertility or primary ovarian insufficiency, including cases where these conditions are induced by anticancer therapy.

• 한국임상수의학회지
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• 제38권6호
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• pp.261-268
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• 2021

The study was conducted to evaluate the effects of carboxymethyl chitosan (CMC) on proliferation, migration, and lipopolysaccharide (LPS)-induced inflammatory response in canine bone marrow-derived mesenchymal stem cells (BMSCs). The proliferation and migration of BMSCs were examined after treatment with CMC. The effect of CMC on the mRNA expression of inflammatory cytokines, such as interleukin (IL)-1β, IL-6, tumor necrosis factor (TNF)-α, IL-10, and transforming growth factor (TGF)-β, was also evaluated by reverse transcription polymerase chain reaction (RT-PCR). In the proliferation assay, no significant changes were found at all CMC concentrations compared with controls. The migration assay showed that CMC dose-dependently stimulated the migration of BMSCs in normal and LPS-treated conditions. RT-PCR showed that TNF-α and IL-10 expressions were suppressed in the BMSCs after CMC treatment. However, other genes were not affected. Taken together, CMC promoted BMSC migration and inhibited TNF-α and IL-10. Therefore, CMC may be possible to regulate wound healing when mesenchymal stem cells are applied in inflammatory diseases.

• 대한음성언어의학회:학술대회논문집
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• 대한음성언어의학회 2003년도 제19회 학술대회
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• pp.183-183
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• 2003

Background and Objectives : Cartilage reconstruction is one of medical issue in otolaryngology. Tissue engineering is presently being utilized in part of cartilage repair. Sources of cells for tissue engineering are chondrocyte from mature cartilage and bone marrow mesenchymal stem cells that are able to differentiate into chondrocyte. Recent studies have shown that adipose tissue have mesenchymal stem cells which can differentiate into adipogenic, chondrogenic myogenic osteogenic cells and neural cell in vitro. In this study, we have examined chondrogenic potential of the canine adipose tissue-derived mesenchymal stem cell(ATSC). Materials and Methods : We harvested canine adipose tissue from inguinal area. ATSCs were enzymatically released from canine adipose tissue. Under appropriate culture conditions, ATSCs were induced to differentiate into the chondrocyte lineages using micromass culture technique. We used immunostain to type II collagen and toluidine blue stain to confirm chondrogenic differentiation of ATSCs. Results : We could isolate ATSCs from canine adipose tissue. ATSCs expressed CD29 and CD44 which are specific surface markers of mesenchymal stem cell. ATSCs differentiated into micromass that has positive response to immunostain of type II collagen and toluidine blue stain. Conclusion : In vitro, ATSCs differentiated into cells that have characteristic cartilage matrix molecules in the presence of lineage-specific induction factors. Adipose tissue may represent an alternative source to bone marrow-derived MSCs.

• 한국수정란이식학회지
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• 제32권2호
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• pp.39-45
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• 2017

Mesenchymal stem cells (MSCs) have been considered an alternative source of neuronal lineage cells, which are difficult to isolate from brain and expand in vitro. Previous studies have reported that MSCs expressing Nestin ($Nestin^+$ MSCs), a neuronal stem/progenitor cell marker, exhibit increased transcriptional levels of neural development-related genes, indicating that $Nestin^+$ MSCs may exert potential with neurogenic differentiation. Accordingly, we investigated the effects of the presence of $Nestin^+$ MSCs in bone-marrow-derived primary cells (BMPCs) on enhanced neurogenic differentiation of BMPCs by identifying the presence of $Nestin^+$ MSCs in uncultured and cultured BMPCs. The percentage of $Nestin^+$ MSCs in BMPCs was measured per passage by double staining with Nestin and CD90, an MSC marker. The efficiency of neurogenic differentiation was compared among passages, revealing the highest and lowest yields of $Nestin^+$ MSCs. The presence of $Nestin^+$ MSCs was identified in BMPCs before in vitro culture, and the highest and lowest percentages of $Nestin^+$ MSCs in BMPCs was observed at the third (P3) and fifth passages (P5). Moreover, significantly the higher efficiency of differentiation into neurons, oligodendrocyte precursor cells and astrocytes was detected in BMPCs at P3, compared with P5. In conclusion, these results demonstrate that neurogenic differentiation can be enhanced by increasing the proportion of $Nestin^+$ MSCs in cultured BMPCs.