scholarly journals Effect of micro-nano-hybrid structured hydroxyapatite bioceramics on osteogenic and cementogenic differentiation of human periodontal ligament stem cell via Wnt signaling pathway

2015 ◽  
pp. 7031 ◽  
Author(s):  
Li Xia Mao ◽  
Jiaqiang Liu ◽  
Jinglei Zhao ◽  
Lunguo Xia ◽  
Lingyong Jiang ◽  
...  
Keyword(s):  
Stem Cell ◽  
Wnt Signaling ◽  
Signaling Pathway ◽  
Periodontal Ligament ◽  
Wnt Signaling Pathway ◽  
Periodontal Ligament Stem Cell

scholarly journals Silencing of long noncoding RNA HOXA11-AS inhibits the Wnt signaling pathway via the upregulation of HOXA11 and thereby inhibits the proliferation, invasion, and self-renewal of hepatocellular carcinoma stem cells

2019 ◽  
Vol 51 (11) ◽  
pp. 1-20 ◽  
Author(s):  
Jun-Cheng Guo ◽  
Yi-Jun Yang ◽  
Jin-Fang Zheng ◽  
Jian-Quan Zhang ◽  
Min Guo ◽  
...  
Keyword(s):  
Hepatocellular Carcinoma ◽  
Stem Cells ◽  
Stem Cell ◽  
Wnt Signaling ◽  
Signaling Pathway ◽  
Methylation Level ◽  
Wnt Signaling Pathway ◽  
The Self ◽  
Self Renewal

AbstractHepatocellular carcinoma (HCC) is a major cause of cancer-related deaths, but its molecular mechanisms are not yet well characterized. Long noncoding RNAs (lncRNAs) play crucial roles in tumorigenesis, including that of HCC. However, the role of homeobox A11 antisense (HOXA11-AS) in determining HCC stem cell characteristics remains to be explained; hence, this study aimed to investigate the effects of HOXA11-AS on HCC stem cell characteristics. Initially, the expression patterns of HOXA11-AS and HOXA11 in HCC tissues, cells, and stem cells were determined. HCC stem cells, successfully sorted from Hep3B and Huh7 cells, were transfected with short hairpin or overexpression plasmids for HOXA11-AS or HOXA11 overexpression and depletion, with an aim to study the influences of these mediators on the self-renewal, proliferation, migration, and tumorigenicity of HCC stem cells in vivo. Additionally, the potential relationship and the regulatory mechanisms that link HOXA11-AS, HOXA11, and the Wnt signaling pathway were explored through treatment with Dickkopf-1 (a Wnt signaling pathway inhibitor). HCC stem cells showed high expression of HOXA11-AS and low expression of HOXA11. Both HOXA11-AS silencing and HOXA11 overexpression suppressed the self-renewal, proliferation, migration, and tumorigenicity of HCC stem cells in vivo, as evidenced by the decreased expression of cancer stem cell surface markers (CD133 and CD44) and stemness-related transcription factors (Nanog, Sox2, and Oct4). Moreover, silencing HOXA11-AS inactivated the Wnt signaling pathway by decreasing the methylation level of the HOXA11 promoter, thereby inhibiting HCC stem cell characteristics. Collectively, this study suggested that HOXA11-AS silencing exerts an antitumor effect, suppressing HCC development via Wnt signaling pathway inactivation by decreasing the methylation level of the HOXA11 promoter.

scholarly journals miR-217 targeting DKK1 promotes cancer stem cell properties via activation of the Wnt signaling pathway in hepatocellular carcinoma

2017 ◽  
Vol 38 (4) ◽  
pp. 2351-2359 ◽  
Author(s):  
Chunlin Jiang ◽  
Miao Yu ◽  
Xiaoyan Xie ◽  
Guangliang Huang ◽  
Yao Peng ◽  
...  
Keyword(s):  
Hepatocellular Carcinoma ◽  
Stem Cell ◽  
Cancer Stem Cell ◽  
Wnt Signaling ◽  
Signaling Pathway ◽  
Wnt Signaling Pathway

scholarly journals Mesenchymal Stem Cell Therapy Alleviates Interstitial Cystitis by Activating Wnt Signaling Pathway

2015 ◽  
Vol 24 (14) ◽  
pp. 1648-1657 ◽  
Author(s):  
Miho Song ◽  
Jisun Lim ◽  
Hwan Yeul Yu ◽  
Junsoo Park ◽  
Ji-Youn Chun ◽  
...  
Keyword(s):  
Stem Cell ◽  
Mesenchymal Stem Cell ◽  
Cell Therapy ◽  
Wnt Signaling ◽  
Interstitial Cystitis ◽  
Signaling Pathway ◽  
Stem Cell Therapy ◽  
Wnt Signaling Pathway ◽  
Mesenchymal Stem Cell Therapy

Downregulation of Cancer Stemness by Novel Diterpenoid Ovatodiolide Inhibits Hepatic Cancer Stem Cell-Like Traits by Repressing Wnt/β-Catenin Signaling

2018 ◽  
Vol 46 (04) ◽  
pp. 891-910 ◽  
Author(s):  
Mingche Liu ◽  
Oluwaseun Adebayo Bamodu ◽  
Kuang-Tai Kuo ◽  
Wei-Hwa Lee ◽  
Yen-Kuang Lin ◽  
...  
Keyword(s):  
Stem Cell ◽  
Wnt Signaling ◽  
Signaling Pathway ◽  
Anticancer Agents ◽  
Target Therapy ◽  
Wnt Signaling Pathway ◽  
Tumor Evolution ◽  
Canonical Wnt Signaling ◽  
Differentiation Potential ◽  
Canonical Wnt

The hierarchical tumor propagation or cancer stem cells (CSCs) model of carcinogenesis postulates that like physiologic adult stem cell (ASC), the CSCs positioned at the apex of any tumor population form the crux of tumor evolution with a constitutive regenerative capacity and differentiation potential. The propagation and recurrence of the characteristically heterogeneous and therapy-resistant hepatocellular carcinoma (HCC), adds to accumulating evidence to support this CSCs model. Based on the multi-etiologic basis of HCC formation which among others, focuses on the disruption of the canonical Wnt signaling pathway, this study evaluated the role of cembrane-type phytochemical, Ovatodiolide, in the modulation of the Wnt/[Formula: see text]-catenin pathway, and its subsequent effect on liver CSCs’ activities. Our fluorescence-activated cell sorting (FACS) and quantitative RT-PCR analyses of side population (SP) indicated that CD133+ cells were [Formula: see text]-catenin-overexpressing, more aggressive, and resistant to the conventional anticancer agents, Cisplatin and Doxorubicin, when compared to [Formula: see text]-catenin-downregulated group. We demonstrated that marked upregulation of [Formula: see text]-catenin and its downstream targets effectively enhanced hepatosphere formation, with an associated induction of CD133, OCT4 and Sox2 expression and also caused an significant enhancement of HCC proliferation. However, treatment with Ovatodiolide induced downregulation of [Formula: see text]-catenin and its downstream effector genes, abolished hepatosphere formation and reversed the [Formula: see text]-catenin-associated enhancement of HCC growth. In summary, we demonstrated for the first time that Ovatodiolide suppressed the canonical Wnt signaling pathway, and inhibited the generation of liver CSCs; Thus, projecting Ovatodiolide as a putatively effective therapeutic agent for anti-HCC target therapy.

scholarly journals Valproic acid Promotes the in Vitro Differentiation of Human Pluripotent Stem Cells Into Spermatogonial Stem Cell-like Cells

2021 ◽  
Author(s):  
Xiaotong Wang ◽  
Mengyuan Qu ◽  
Zili Li ◽  
Yuting Long ◽  
Kai Hong ◽  
...  
Keyword(s):  
Stem Cells ◽  
Stem Cell ◽  
Wnt Signaling ◽  
Signaling Pathway ◽  
Pluripotent Stem Cells ◽  
Wnt Signaling Pathway ◽  
Human Pluripotent Stem Cells ◽  
Sequencing Analysis ◽  
Upregulated Genes

Abstract Background: Studying human germ cell development and male infertility is heavily relied on mouse models. In vitro differentiation of human pluripotent stem cells into spermatogonial stem cell-like cells (SSCLCs) can be used as a model to study human germ cells and infertility. The current study aimed to develop the SSCLC induction protocol and assess the effects of the developed protocol on the SSCLC induction. Methods: We examined the effects of valproic acid (VPA), vitamin C (VC) and the combination of VPA and VC on the SSCLC induction efficiency and determined the expression of spermatogonial genes of differentiated cells. The percentage of haploid cells and cells expressed meiotic and spermatid genes were also detected. RNA-sequencing analysis was performed to compare the transcriptome between cells at 0 and 12 days of differentiation and differently expressed genes were confirmed by RT-qPCR. We further evaluated the alteration in histone marks (H3K9ac and H3K27me3) at 12 days of differentiation. Moreover, the SSCLC induction efficiency of two hiPSC lines of non-obstructive azoospermia (NOA) patients was assessed using different induction protocols.Results: The combination of low concentrations of VPA and VC in the induction medium was most effective to induce SSCLCs expressing several spermatogonial genes from human pluripotent stem cells at 12 days of differentiation. High concentration of VPA was more effective to induce cells expressing meiotic genes and haploid cells. RNA-sequencing analysis revealed that the induction of SSCLC involved the upregulated genes in Wnt signaling pathway, and cells at 12 days of differentiation showed increased H3K9ac and decreased H3K27me3. Additionally, two hiPSC lines of NOA patients showed low SSCLC induction efficiency and the expression of genes in Wnt signaling pathway. Conclusions: VPA robustly promotes the differentiation of human pluripotent stem cell lines into SSCLCs, which involved the upregulated genes in Wnt signaling pathway and epigenetic changes. hiPSCs from NOA patients showed decreased SSCLC induction efficiency and Wnt signaling pathway gene expression, suggesting that inactivation of Wnt signaling pathway might be a cause of SSC depletion in azoospermia testes. Our developed SSCLC induction protocol provides a reliable tool and model to study human germ cell development and male infertility.

HER2 Regulates Cancer Stem Cell Activities via the Wnt Signaling Pathway in Gastric Cancer Cells

Oncology ◽  
2019 ◽  
Vol 97 (5) ◽  
pp. 311-318 ◽  
Author(s):  
Da Hyun Jung ◽  
Yoo Jin Bae ◽  
Jie-Hyun Kim ◽  
You Keun Shin ◽  
Hei-Cheul Jeung
Keyword(s):  
Gastric Cancer ◽  
Stem Cell ◽  
Cancer Stem Cell ◽  
Wnt Signaling ◽  
Cancer Cells ◽  
Signaling Pathway ◽  
Wnt Signaling Pathway ◽  
Gastric Cancer Cells

Targeting Wnt Signaling through Small molecules in Governing Stem Cell Fate and Diseases

2019 ◽  
Vol 19 (3) ◽  
pp. 233-246 ◽  
Author(s):  
Antara Banerjee ◽  
Ganesan Jothimani ◽  
Suhanya Veronica Prasad ◽  
Francesco Marotta ◽  
Surajit Pathak
Keyword(s):  
Stem Cells ◽  
Stem Cell ◽  
Wnt Signaling ◽  
Small Molecules ◽  
Signaling Pathway ◽  
Cell Fate ◽  
Wnt Pathway ◽  
Molecular Mechanisms ◽  
Wnt Signaling Pathway ◽  
Stem Cell Fate

Background:The conserved Wnt/β-catenin signaling pathway is responsible for multiple functions including regulation of stem cell pluripotency, cell migration, self-renewability and cell fate determination. This signaling pathway is of utmost importance, owing to its ability to fuel tissue repair and regeneration of stem cell activity in diverse organs. The human adult stem cells including hematopoietic cells, intestinal cells, mammary and mesenchymal cells rely on the manifold effects of Wnt pathway. The consequences of any dysfunction or manipulation in the Wnt genes or Wnt pathway components result in specific developmental defects and may even lead to cancer, as it is often implicated in stem cell control. It is absolutely essential to possess a comprehensive understanding of the inhibition and/ or stimulation of the Wnt signaling pathway which in turn is implicated in determining the fate of the stem cells.Results:In recent years, there has been considerable interest in the studies associated with the implementation of small molecule compounds in key areas of stem cell biology including regeneration differentiation, proliferation. In support of this statement, small molecules have unfolded as imperative tools to selectively activate and inhibit specific developmental signaling pathways involving the less complex mechanism of action. These compounds have been reported to modulate the core molecular mechanisms by which the stem cells regenerate and differentiate.Conclusion:This review aims to provide an overview of the prevalent trends in the small molecules based regulation of stem cell fate via targeting the Wnt signaling pathway.

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