• 제목/요약/키워드: mesenchymal

검색결과 1,125건 처리시간 0.031초

Human adipose-derived mesenchymal stem cell spheroids improve recovery in a mouse model of elastase-induced emphysema

  • Cho, Ryeon Jin;Kim, You-Sun;Kim, Ji-Young;Oh, Yeon-Mok
    • BMB Reports
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    • 제50권2호
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    • pp.79-84
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    • 2017
  • Emphysema, a pathologic component of the chronic obstructive pulmonary disease, causes irreversible destruction of lung. Many researchers have reported that mesenchymal stem cells can regenerate lung tissue after emphysema. We evaluated if spheroid human adipose-derived mesenchymal stem cells (ASCs) showed greater regenerative effects than dissociated ASCs in mice with elastase-induced emphysema. ASCs were administered via an intrapleural route. Mice injected with spheroid ASCs showed improved regeneration of lung tissues, increased expression of growth factors such as fibroblast growth factor-2 (FGF2) and hepatocyte growth factor (HGF), and a reduction in proteases with an induction of protease inhibitors when compared with mice injected with dissociated ASCs. Our findings indicate that spheroid ASCs show better regeneration of lung tissues than dissociated ACSs in mice with elastase-induced emphysema.

MicroRNAs as critical regulators of the endothelial to mesenchymal transition in vascular biology

  • Kim, Jongmin
    • BMB Reports
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    • 제51권2호
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    • pp.65-72
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    • 2018
  • The endothelial to mesenchymal transition (EndMT) is a newly recognized, fundamental biological process involved in development and tissue regeneration, as well as pathological processes such as the complications of diabetes, fibrosis and pulmonary arterial hypertension. The EndMT process is tightly controlled by diverse signaling networks, similar to the epithelial to mesenchymal transition. Accumulating evidence suggests that microRNAs (miRNAs) are key regulators of this network, with the capacity to target multiple messenger RNAs involved in the EndMT process as well as in the regulation of disease progression. Thus, it is highly important to understand the molecular basis of miRNA control of EndMT. This review highlights the current fund of knowledge regarding the known links between miRNAs and the EndMT process, with a focus on the mechanism that regulates associated signaling pathways and discusses the potential for the EndMT as a therapeutic target to treat many diseases.

Human amnion-derived mesenchymal stem cells induced osteogenesis and angiogenesis in human adipose-derived stem cells via ERK1/2 MAPK signaling pathway

  • Wang, Yuli;Chen, Xichen;Yin, Ying;Li, Song
    • BMB Reports
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    • 제51권4호
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    • pp.194-199
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    • 2018
  • Mesenchymal stem cells (MSCs) have shown great potential in treating bone deficiency. Human adipose-derived stem cells (HASCs) are multipotent progenitor cells with multi-lineage differentiation potential. Human amnion-derived mesenchymal stem cells (HAMSCs) are capable of promoting osteogenic differentiation of MSCs. In this study, we investigated the effect of HAMSCs on HASCs by a transwell co-culture system. HAMSCs promoted proliferation, osteogenic differentiation, angiogenic potential and adiponectin (APN) secretion of HASCs. Moreover, the positive effect of HAMSCs was significantly inhibited by U0126, a highly selective inhibitor of extracellular signaling-regulated kinase 1/2 (ERK1/2) mitogen-activated protein kinase (MAPK) signaling pathway. These observations suggested that HAMSCs induced bone regeneration in HASCs via ERK1/2 MAPK signaling pathway.

Cell Lineage, Self-Renewal, and Epithelial-to-Mesenchymal Transition during Secondary Neurulation

  • Kawachi, Teruaki;Tadokoro, Ryosuke;Takahashi, Yoshiko
    • Journal of Korean Neurosurgical Society
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    • 제64권3호
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    • pp.367-373
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    • 2021
  • Secondary neurulation (SN) is a critical process to form the neural tube in the posterior region of the body including the tail. SN is distinct from the anteriorly occurring primary neurulation (PN); whereas the PN proceeds by folding an epithelial neural plate, SN precursors arise from a specified epiblast by epithelial-to-mesenchymal transition (EMT), and undergo self-renewal in the tail bud. They finally differentiate into the neural tube through mesenchymal-to-epithelial transition (MET). We here overview recent progresses in the studies of SN with a particular focus on the regulation of cell lineage, self-renewal, and EMT/MET. Cellular mechanisms underlying SN help to understand the functional diversity of the tail in vertebrates.

A method of isolation and characterization of canine endometrial-derived mesenchymal stem cells

  • Mi Kyung Park;Kun Ho Song
    • 한국동물위생학회지
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    • 제46권2호
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    • pp.157-160
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    • 2023
  • Endometrial tissue is a known source of mesenchymal stem cells (MSCs). We isolated canine endometrial stem cells from canine endometrial tissues using an enzymatic method and confirmed the immunophenotype of mesenchymal stem cells and multilineage differentiation. Canine endometrial tissues were obtained from canine ovariohysterectomy surgery and isolated using 0.2% collagenase type I. We measured the immunophenotype of stem cells using flow cytometry. To confirm the differentiation ability, a trilineage differentiation assay was conducted. In this study, canine endometrialderived MSCs (cEM-MSCs) were isolated by enzyme treatment and showed a spindle-shaped morphology under a microscope. Moreover, cEM-MSCs showed a trilineage differentiation ability. In this study, the canine endometrium was a good source of MSCs.

제대혈액에서 골조직 특이세포로의 분화 (Differentiation of Osteoblast Progenitor Cells from Human Umbilical Cord Blood)

  • 홍승진;이은아;채규태;한훈
    • IMMUNE NETWORK
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    • 제2권3호
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    • pp.166-174
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    • 2002
  • Background: Human umbilical cord bloods, which could be taken during the delivery are utilized as a source of hematopoietic stem cells. Also in cord blood, there are several kinds of stem cells such as endothelial and mesenchymal stem cells. Methods: We isolated the mesenchymal stem cells from human umbilical cord bloods and confirmed the differentiation of these cells into osteoblast progenitor cells. The mesenchymal stem cells derived from umbilical cord blood have the ability to differentiate into specific tissue cells, which is one of characteristics of stem cells. These cells were originated from the multipolar shaped cells out of adherent cells of the umbilical cord blood mononuclear cell culture. Results: The mesenchymal stem cells expressed cell surface antigen CD13, CD90, CD102, CD105, ${\alpha}$-smooth muscle actin and cytoplasmic antigen vimentine. Having cultrued these cells in bone formation media, we observed the formation of extracellular matrix and the expression of alkaline phosphatase and of mRNA of cbfa-1, ostoecalcin and type I collagen. Conclusion: From these results we concluded that the cells isolated from the umbilical cord blood were mesenchymal stem cells, which we could differentiate into osteoblast when cultured in bone formation media. In short, it is suggested that these cells could be used as a new source of stem cells, which has the probability to alternate the embryonic stem cells.

종골에 발생한 간엽성 연골육종 - 1예 보고 - (Mesenchymal Chondrosarcoma of the Calcaneous)

  • 성기선;손정경;조은윤
    • 대한골관절종양학회지
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    • 제11권2호
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    • pp.219-223
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    • 2005
  • 간엽성 연골육종은 전형적인 연골육종과는 달리 매우 드문 것으로 알려져 있으며, 골격계 부위에서는 하지, 특히 대퇴골에서 대부분 발생하며, 다음으로 두안면부, 골반부에서 발생하는 것으로 보고되어 왔다. 11세 남아가 좌측 후족부 통증으로 타 병원에서 양성 골 종양 추정 하에 수술적 제거술을 시행 받고, 수술 후 조직검사 결과, 악성 종양으로 진단되어, 본원으로 전원 되었다. 조직 재 판독 결과, 좌측 종골 간엽성 연골 육종으로 진단되어, 슬하부 절단을 시행하였다. 외래 경과 관찰 중 술 후 3개월에 흉부 컴퓨터 촬영상 다발성 폐 전이성 결절 소견 보여 전이절제술 및 항암 치료를 시행하였다. 문헌상 간엽성 연골육종이 족저부 연부 조직에 발생한 경우는 1예가 있으나 종골 골조직에 발생한 경우는 없어 문헌 고찰과 함께 보고하는 바이다.

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Melatonin Rescues Mesenchymal Stem Cells from Senescence Induced by the Uremic Toxin p-Cresol via Inhibiting mTOR-Dependent Autophagy

  • Yun, Seung Pil;Han, Yong-Seok;Lee, Jun Hee;Kim, Sang Min;Lee, Sang Hun
    • Biomolecules & Therapeutics
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    • 제26권4호
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    • pp.389-398
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    • 2018
  • p-Cresol, found at high concentrations in the serum of chronic kidney failure patients, is known to cause cell senescence and other complications in different parts of the body. p-Cresol is thought to mediate cytotoxic effects through the induction of autophagy response. However, toxic effects of p-cresol on mesenchymal stem cells have not been elucidated. Thus, we aimed to investigate whether p-cresol induces senescence of mesenchymal stem cells, and whether melatonin can ameliorate abnormal autophagy response caused by p-cresol. We found that p-cresol concentration-dependently reduced proliferation of mesenchymal stem cells. Pretreatment with melatonin prevented pro-senescence effects of p-cresol on mesenchymal stem cells. We found that by inducing phosphorylation of Akt and activating the Akt signaling pathway, melatonin enhanced catalase activity and thereby inhibited the accumulation of reactive oxygen species induced by p-cresol in mesenchymal stem cells, ultimately preventing abnormal activation of autophagy. Furthermore, preincubation with melatonin counteracted other pro-senescence changes caused by p-cresol, such as the increase in total 5'-AMP-activated protein kinase expression and decrease in the level of phosphorylated mechanistic target of rapamycin. Ultimately, we discovered that melatonin restored the expression of senescence marker protein 30, which is normally suppressed because of the induction of the autophagy pathway in chronic kidney failure patients by p-cresol. Our findings suggest that stem cell senescence in patients with chronic kidney failure could be potentially rescued by the administration of melatonin, which grants this hormone a novel therapeutic role.

Epithelial-mesenchymal Transition is Associated with Acquired Resistance to 5-Fluorocuracil in HT-29 Colon Cancer Cells

  • Kim, A-Young;Kwak, Jae-Hwan;Je, Nam Kyung;Lee, Yun-hee;Jung, Young-Suk
    • Toxicological Research
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    • 제31권2호
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    • pp.151-156
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    • 2015
  • 5-Fluorouracil (5-FU) is commonly used for the therapy of colon cancer; however, acquired resistance to 5-FU is a critical barrier to successful treatment and the primary cause of chemotherapy failure. Epithelial-mesenchymal transition (EMT) is a process whereby cells undergo alterations in morphology and molecular characteristics promoting tumor progression and metastasis. Accumulating evidence shows that transition from epithelial to mesenchymal phenotype in cancer cells is associated with their resistance to chemotherapy. However, it is still poorly understood whether EMT is involved in acquired resistance to 5-FU. In this study, we developed an in vitro cell model, 5-FU-resistant HT-29 colon cancer cells, and characterized the differences in cellular morphology and molecular alterations between parental and resistant cells. In accord with mesenchymal-like morphology of 5-FU-resistant HT-29 cells, the expression of the mesenchymal marker fibronectin was significantly increased in these cells in comparision with that in the parental cells. Of interest, we also found a marked increase in the expression of EMT-inducing transcription factors Twist, Zeb1, and Zeb2. Finally, 5-FU-resistant cells showed enhanced migration in comparison with parental HT-29. Taken together, these results indicate that EMT could be associated with 5-FU resistance acquired by HT-29 cells. A specific role of each transcription factor found in this study will require further investigation.