scholarly journals No evidence for induction of key components of the Notch signaling pathway (Notch-1, Jagged-1) by treatment with UV-B, 1,25(OH)2D3, and/or epigenetic drugs (TSA, 5-Aza) in human keratinocytes in vitro

2012 ◽  
Vol 4 (1) ◽  
pp. 44-52 ◽  
Author(s):  
Sandra Reichrath ◽  
Jörg Reichrath
Keyword(s):  
Notch Signaling ◽  
Signaling Pathway ◽  
Human Keratinocytes ◽  
Notch Signaling Pathway ◽  
Notch 1 ◽  
Epigenetic Drugs

Andrographolide Inhibits Proliferation of Colon Cancer SW-480 Cells via Downregulating Notch Signaling Pathway.

2020 ◽  
Vol 20 ◽  
Author(s):  
Imran Khan ◽  
Sadaf Mahfooz ◽  
Mohd Saeed ◽  
Irfan Ahmad ◽  
Irfan A. Ansari
Keyword(s):  
Cell Cycle ◽  
Colon Cancer ◽  
Notch Signaling ◽  
Signaling Pathway ◽  
Mtt Assay ◽  
Annexin V ◽  
Notch Signaling Pathway ◽  
Phase Cell ◽  
Ros Generation ◽  
Notch 1

Background: Recently Notch signaling pathway has gained attention as a potential therapeutic target for chemotherapeutic intervention. However, the efficacy of previously known Notch inhibitors in colon cancer is still unclear. The purpose of this study was to investigate the effect of andrographolide on aberrantly activated Notch signaling in SW-480 cells in vitro. Methods: The cytostatic potential of andrographolide on SW-480 cells was evaluated by 3-(4,5-dimethylthiazol-2-yl)-2, 5-diphenyl tetrazolium bromide (MTT) assay, morphology assessment and colony formation assay. The apoptotic activity was evaluated by FITC Annexin V assay, 4′,6-diamidino-2-phenylindole (DAPI), Hoechst, Rhodamine 123 and Mito Tracker CMXRos staining. Scratch assay for migratory potential assessment. 7’-Dichlorodihydrofluorescein Diacetate (DCFH-DA) staining was used to evaluate the Reactive Oxygen Species (ROS) generation. Relative mRNA expression of Bax, Bcl2, NOTCH 1 and JAGGED 1 was estimated by Real-Time Quantitative Reverse Transcription PCR (qRT-PCR). Cell cycle phase distribution was evaluated Annexin V-FITC/PI staining. Results: MTT assay demonstrated dose and time dependent cytoxicity of andrographolide on SW-480 cells. It also inhibited the migratory and colony forming potential of SW-480 cells. Furthermore, andrographolide also showed disruption of mitochondrial membrane potential and induced apoptosis through nuclear condensation. Flow cytometric evaluation showed andrographolide enhanced early and late apoptotic cells and induced upregulation of proapoptotic (Bax and Bad) and downregulation of antiapoptotic Bcl2 in treated SW-480 cells. Andrographolide augmented intracellular ROS generation and induced G0/G1 phase cell cycle arrest in colon cancer SW480 cells. Furthermore, andrographolide repressed the Notch signaling by decreasing the expression of NOTCH 1 and JAGGED 1. Conclusion: Our findings suggested that andrographolide constraint the growth of SW-480 cells through the inhibition of Notch signaling pathway.

Treatment of Intrauterine Adhesions with Human Amnion Mesenchymal Stromal Cells (hAMSCs) on Promoting Endometrial Regeneration and Repair Via Notch Signaling Pathway Regulation

2020 ◽  
Author(s):  
Jie Yu ◽  
Wenwen Zhang ◽  
Jiayue Huang ◽  
Yating Gou ◽  
Congcong Sun ◽  
...  
Keyword(s):  
Epithelial Cells ◽  
Notch Signaling ◽  
Signaling Pathway ◽  
Notch Signaling Pathway ◽  
Intrauterine Adhesions ◽  
Epithelial Markers ◽  
Qrt Pcr ◽  
Endometrial Epithelial Cells

Abstract Background: Human amniotic mesenchymal stem cells(hAMSCs) can repair and improve the damaged endometrium which its aplastic disorder is the main reason for intrauterine adhesions(IUAs).Methods: We conducted in vivo and in vitro experiments. In vivo experiments: 45 female Sprague-Dawley(SD) rats were involved and randomized equally into Sham group, IUA group, Estradiol(E2) group, hAMSCs group, and E2 + hAMSCs group. The effect of hAMSCs and E2 only or combined was evaluated by Hematoxylin-eosin(HE) and Masson staining. The expression of epithelial markers and key proteins of Notch signaling pathway by Immunohistochemistry. In vitro experiments: Firstly, the hAMSCs cells were taken and divided into control group and induced group in which hAMSCs were differentiated into endometrial epithelial cells in induced microenvironment, and extracted their RNA respectively. The expression of epithelial markers and Notch1 messenger RNA (mRNA) was detected by Real-time quantitative polymerase chain reaction(qRT-PCR). and the changes in expression position of Notch intracellular domain(NICD) and expression amount of target gene, hairy enhancer of split 1(Hes1) were detected by Immunofluorescence. Then, Activated and inhibited the Notch signaling pathway while induction, and detected mRNA expression of hAMSCs epithelial markers by quantitative real-time polymerase chainreaction (qRT-PCR) respectively and detected hAMSCs cell cycle by flow cytometric. Results:This study showed that hAMSCs alone or combined with E2 could promote endometrial repair, and Notch signaling pathway a great role in it. And otherwise, the activation or habitation of Notch signaling pathway determines whether hAMSCs could differentiate into endometrial epithelial cells or not.Conclusion: we concluded that activate the Notch signaling pathway promote the differentiation of hAMSCs into endometrial epithelial cells, and further treat IUAs.

scholarly journals Bufei Qingyu Granules Inhibit the Development of Systemic Sclerosis via Notch-1/Jagged-2 Signaling Pathway

2019 ◽  
Vol 2019 ◽  
pp. 1-16
Author(s):  
Minhui Su ◽  
Fang Tian ◽  
Bingchen Ouyang ◽  
Xiaoyu Wu ◽  
Feng Guo ◽  
...  
Keyword(s):  
Systemic Sclerosis ◽  
Notch Signaling ◽  
Signaling Pathway ◽  
Molecular Mechanisms ◽  
Smooth Muscle Actin ◽  
Notch Signaling Pathway ◽  
Translation Initiation Factor ◽  
Initiation Factor ◽  
Notch 1 ◽  
Bioinformatics Analyses

Systemic sclerosis (SSc) is a rare chronic autoimmune disorder, mainly characterized by skin sclerosis. In this study, Bufei Qingyu Granules (BQG), a Chinese herbal formula, was used to treat SSc. To better understand the effects and molecular mechanisms of BQG, we successfully established a Bleomycin- (BLM-) induced SSc mouse model, and the mice were treated by BQG. Meanwhile, transcriptomic and bioinformatics analyses were conducted on those samples. As a result, we visually showed that BQG ameliorated the overall health of mice, including body weight, spleen, and thymus index. Thus, it also significantly alleviated inflammation presented by Chemokine (C-X-C motif) ligand 2 (Cxcl2), vasculopathy characterized by α-smooth muscle actin (α-SMA), and fibrotic changes elaborated by not only pathological images, but also the hydroxyproline (HYP) content. After testing by transcriptomic analysis, Cxcl2, Synaptosomal-associated protein 25 (Snap25), and Eukaryotic translation initiation factor 3, and subunit J2 (Eif3j2) which were differentially expressed genes, were verified, so that the data were credible. We further found that BQG could regulate Notch signaling pathway by significantly decreasing both mRNA and protein expression levels of Notch-1 and Jagged-2. Hence, this study demonstrated that BQG could ameliorate the sclerotic skin in mice model involved in inflammation, vascular changes, and fibrosis effects, which was partly mediated by Notch signaling pathway.

scholarly journals Sodium Tanshinone IIA Silate Exerts Microcirculation Protective Effects against Spinal Cord Injury In Vitro and In Vivo

2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Xing Li ◽  
Dan Luo ◽  
Yu Hou ◽  
Yonghui Hou ◽  
Shudong Chen ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Endothelial Cells ◽  
Notch Signaling ◽  
Signaling Pathway ◽  
Notch Signaling Pathway ◽  
Tanshinone Iia ◽  
Protective Effects ◽  
Cord Injury

Spinal cord microcirculation involves functioning endothelial cells at the blood spinal cord barrier (BSCB) and maintains normal functioning of spinal cord neurons, axons, and glial cells. Protection of both the function and integrity of endothelial cells as well as the prevention of BSCB disruption may be a strong strategy for the treatment of spinal cord injury (SCI) cases. Sodium Tanshinone IIA silate (STS) is used for the treatment of coronary heart disease and improves microcirculation. Whether STS exhibits protective effects for SCI microcirculation is not yet clear. The purpose of this study is to investigate the protective effects of STS on oxygen-glucose deprivation- (OGD-) induced injury of spinal cord endothelial cells (SCMECs) in vitro and to explore effects on BSCB and neurovascular protection in vivo. SCMECs were treated with various concentrations of STS (1 μM, 3 μM, and 10 μM) for 24 h with or without OGD-induction. Cell viability, tube formation, migration, and expression of Notch signaling pathway components were evaluated. Histopathological evaluation (H&E), Nissl staining, BSCB permeability, and the expression levels of von Willebrand Factor (vWF), CD31, NeuN, and Notch signaling pathway components were analyzed. STS was found to improve SCMEC functions and reduce inflammatory mediators after OGD. STS also relieved histopathological damage, increased zonula occludens-1 (ZO-1), inhibited BSCB permeability, rescued microvessels, protected motor neuromas, and improved functional recovery in a SCI model. Moreover, we uncovered that the Notch signaling pathway plays an important role during these processes. These results indicated that STS protects microcirculation in SCI, which may be used as a therapeutic strategy for SCI in the future.

scholarly journals SPON2 Is Upregulated through Notch Signaling Pathway and Promotes Tumor Progression in Gastric Cancer

Cancers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1439
Author(s):  
Hyeon-Gu Kang ◽  
Won-Jin Kim ◽  
Myung-Giun Noh ◽  
Kyung-Hee Chun ◽  
Seok-Jun Kim
Keyword(s):  
Gastric Cancer ◽  
Cell Proliferation ◽  
Notch Signaling ◽  
Signaling Pathway ◽  
Cancer Progression ◽  
Notch Signaling Pathway ◽  
Migration And Invasion ◽  
Gene Assay ◽  
Gastric Cancer Progression

Spondin-2 (SPON2) is involved in cancer progression and metastasis of many tumors; however, its role and underlying mechanism in gastric cancer are still obscure. In this study, we investigated the role of SPON2 and related signaling pathway in gastric cancer progression and metastasis. SPON2 expression levels were found to be upregulated in gastric cancer cell lines and patient tissues compared to normal gastric epithelial cells and normal controls. Furthermore, SPON2 silencing was observed to decrease cell proliferation and motility and reduce tumor growth in xenograft mice. Conversely, SPON2 overexpression was found to increase cell proliferation and motility. Subsequently, we focused on regulatory mechanism of SPON2 in gastric cancer. cDNA microarray and in vitro study showed that Notch signaling is significantly correlated to SPON2 expression. Therefore, we confirmed how Notch signaling pathway regulate SPON2 expression using Notch signaling-related transcription factor interaction and reporter gene assay. Additionally, activation of Notch signaling was observed to increase cell proliferation, migration, and invasion through SPON2 expression. Our study demonstrated that Notch signaling-mediated SPON2 upregulation is associated with aggressive progression of gastric cancer. In conclusion, we suggest upregulated SPON2 via Notch signaling as a potential target gene to inhibit gastric cancer progression.

scholarly journals Effects of Notch Signaling Pathway in Cervical Cancer by Curcumin Mediated Photodynamic Therapy and Its Possible Mechanisms in Vitro and in Vivo

2019 ◽  
Vol 10 (17) ◽  
pp. 4114-4122 ◽  
Author(s):  
Guifang He ◽  
Tianlong Mu ◽  
Yali Yuan ◽  
Wenyan Yang ◽  
Yuan Zhang ◽  
...  
Keyword(s):  
Cervical Cancer ◽  
Photodynamic Therapy ◽  
Notch Signaling ◽  
Signaling Pathway ◽  
Notch Signaling Pathway

P0019MICROVESICLES FROM MESENCHYMAL STEM CELLS OVEREXPRESSING MIR-34A INHIBIT TGF-BETA-1-INDUCED EPITHELIAL-MESENVHYMAL TRANSITION IN RENAL TUBULAR EPITHELIAL CELLS IN VITRO

2020 ◽  
Vol 35 (Supplement_3) ◽  
Author(s):  
Juan He ◽  
Yali Jiang ◽  
Yan Wang ◽  
Xiujuan Tian ◽  
Shiren Sun
Keyword(s):  
Stem Cells ◽  
Mesenchymal Stem Cells ◽  
Notch Signaling ◽  
Notch Signaling Pathway ◽  
Tubular Epithelial Cells ◽  
Renal Tubular Epithelial Cells ◽  
Notch 1 ◽  
Renal Tubular ◽  
Tgf Β1

Abstract Background and Aims The application of microRNAs (miRNAs) in the therapy of kidney diseases is hampered by difficulties in delivering miRNAs effectively. Nano-sized microvesicles (MVs) are known as natural carriers of small RNAs. Our prior work has demonstrated that MVs isolated from mesenchymal stem cells (MSCs) attenuated kidney injuries induced by unilateral ureteral obstruction and 5/6 subtotal nephrectomy in mice. The present work aimed at evaluating the effects of miR-34a-5p (miR-34a)-modified MSC-MVs on transforming growth factor (TGF)-β1 induced fibrosis and apoptosis in vitro. Method Bone marrow MSCs were further modified by lentiviruses overexpressing miR-34a, and MVs were collected from these MSCs to treat HK-2 renal tubular cells exposed to TGF-β1. Alterations in epithelial-mesenchymal transition (EMT) and cell survival were further determined. Results We first demonstrated that MVs generated by miR-34a-modified MSCs contained more miR-34a. By analyzing the expression levels of epithelial markers (E-cadherin and Tight Junction Protein 1 (TJP1)) and mesenchymal markers (α-SMA and fibronectin), we found that the pro-fibrotic TGF-β1 induced EMT was remarkably suppressed by miR-34a-enriched MSC-MVs. Notch-1 receptor and Jagged-1 ligand, two major molecules of Notch signaling pathway, are predicted targets of miR-34a. We further found that the elevation in Notch-1 and Jagged-1 induced by TGF-β1 was inhibited by miR-34a-enriched MSC-MVs. The inhibitory effects of miR-34a-enriched MSC-MVs on EMT and Notch signaling pathway were stronger than the control MSC-MVs. In addition, TGF-β1 exposure also induced apoptosis in HK-2 cells. Although miR-34amofidied MSC-MVs could inhibit TGF-β1-triggered apoptosis in HK-2 cells, the effects were less significant than the control MSC-MVs. This phenomenon may be resulted from the pro-apoptotic effects of miR-34a. Conclusion Our study demonstrates that miR-34a-overexpressing MSC-MVs inhibit EMT induced by pro-fibrotic TGF-β1 in renal tubular epithelial cells, possibly through inhibiting Jagged-1/Notch-1 pathway. Genetic modification of MSC-MVs with anti-fibrotic molecule may present a novel strategy for treatment of renal injuries.

scholarly journals Notch Signaling Pathway Is Inhibited in the Development of Barrett’s Esophagus: An In Vivo and In Vitro Study

2018 ◽  
Vol 2018 ◽  
pp. 1-11
Author(s):  
Yun-Cang Wang ◽  
Zhi-Qiang Wang ◽  
Yong Yuan ◽  
Tao Ren ◽  
Peng-Zhi Ni ◽  
...  
Keyword(s):  
Hydrochloric Acid ◽  
Notch Signaling ◽  
Signaling Pathway ◽  
Barrett’S Esophagus ◽  
Barrett's Esophagus ◽  
Deoxycholic Acid ◽  
Notch Signaling Pathway ◽  
Normal Esophagus ◽  
Columnar Metaplasia

Objective. To explore the role of Notch signaling in the development of Barrett’s esophagus. Methods. Patients with esophagectomy and gastric interposition were recruited as a human model of gastroesophageal reflux disease. The expressions of Notch signaling genes in normal esophagus from surgical specimen and columnar metaplasia in the esophageal remnant after esophagectomy were evaluated by real time quantitative Polymerase Chain Reaction (RT-qPCR) and immunohistochemistry (IHC). For in vitro experiments, Het-1A cells were treated with hydrochloric acid, deoxycholic acid, mixture of hydrochloric acid and deoxycholic acid, or Notch1-siRNA, and expressions of Notch1, Hes1, MUC2, and K13 were evaluated via RT-qPCR and western blot. Results. Samples were obtained from 36 patients with columnar metaplasia in the esophageal remnant. Both IHC and RT-qPCR indicated that Notch1 and Hes1 expressions were significantly higher in normal esophagus than that in metaplasia. Hydrochloric acid and deoxycholic acid suppressed Notch1, Hes1, and K13 expressions, in concert with increasing MUC2 expressions. Notch inhibition by Notch1-siRNA contributed to the downregulation of Notch1, Hes1, and K13 expressions, whereas MUC2 expression was enhanced. Conclusions. Both hydrochloric acid and deoxycholic acid could suppress Notch signaling pathway in esophageal epithelial cells, and inhibited Notch signaling has important functions in the development of Barrett’s esophagus.

scholarly journals RBP-J Deficiency Promoted The Proliferation and Differentiation of CD133-Positive Ependymal Cells In Vitro and In Vivo Studies

2021 ◽  
Author(s):  
Xin Ye ◽  
Mengyi Li ◽  
Wei Bian ◽  
Junwei Li ◽  
Ting Zhang ◽  
...  
Keyword(s):  
Notch Signaling ◽  
Signaling Pathway ◽  
Notch Signaling Pathway ◽  
In Vivo Studies ◽  
Ependymal Cells ◽  
Ependymal Layer ◽  
Proliferation And Differentiation ◽  
Mature Neurons

Abstract Although the ependymal cells were reported to have the characteristics of neural stem cells (NSCs), the properties of CD133-ependymal cells have not been uncovered, in particular, it is largely unknown about the effect of Notch signaling pathway on the neurogenesis of CD133-positive ependymal cells. By using the transgenic mouse and primarily cultured ependymal cells, we found that the immunoreactivity for prominin-1/CD133 was exclusively localized in the subventricular zone (SVZ) and ependymal layer of ventricles, moreover, most CD133-positive ependymal cells were co-labeled with Nestin. In addition, RBP-J, a key nuclear effector of Notch signaling pathway, was highly active in CD133-positive ependymal cells. Our results demonstrated that CD133-positive ependymal cells can differentiate into the immature and mature neurons, in particular, the number of CD133-positive ependymal cells differentiating into the immature and mature neurons was significantly increased following the deficiency or interference of RBP-J in vivo or in vitro. By using real-time qPCR and Western blot, we found that RBP-J and Hes1 were down-regulated while Notch1 was up-regulated in the expression levels of mRNAs and proteins following the deficiency or interference of RBP-J in vivo or in vitro. These results demonstrated RBP-J deficiency promoted the proliferation and differentiation of CD133-positive ependymal cells. Therefore, we speculated that RBP-J could maintain CD133-positive ependymal cells in the characteristics of NSCs possibly by regulating Notch1/RBP-J/Hes1 pathway.

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