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Gastric stem cell

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https://www.readbyqxmd.com/read/29689047/nanogp8-is-the-key-regulator-of-stemness-emt-wnt-pathway-chemoresistance-and-other-malignant-phenotypes-in-gastric-cancer-cells
#1
Xia Ma, Bei Wang, Xiaofang Wang, Yujiao Luo, Wufang Fan
BACKGROUND: Accumulating evidence demonstrated that NANOG1, the key transcription factor for embryonic stem cells, is associated with human cancers. NANOGP8, one of the pseudogenes in NANOG gene family, contains an intact open reading frame and also said to be expressed in cancer tissues. Therefore, a systematic study is greatly needed to address the following questions: among NANOG1 and NANOGP8, which gene is the main contributor for NANOG expression in cancer cells and which one is the key regulator responsible for stemness, epithelial-mesenchymal transition (EMT), metastasis, chemoresistance and other malignant phenotypes...
2018: PloS One
https://www.readbyqxmd.com/read/29675663/origins-of-metaplasia-in-barrett-s-esophagus-is-this-an-esophageal-stem-or-progenitor-cell-disease
#2
REVIEW
Wei Zhang, David H Wang
The incidence of esophageal adenocarcinoma has been increasing in Western countries over the past several decades. Though Barrett's esophagus, in which the normal esophageal squamous epithelium is replaced with metaplastic intestinalized columnar cells due to chronic damage from gastroesophageal reflux, is accepted as the requisite precursor lesion for esophageal adenocarcinoma, the Barrett's esophagus cell of origin and the molecular mechanism underlying esophageal epithelial metaplasia remain controversial...
April 19, 2018: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/29671926/cancer-as-a-tissue-the-significance-of-cancer-stromal-interactions-in-the-development-morphogenesis-and-progression-of-human-upper-digestive-tract-cancer
#3
REVIEW
Hiroshi Yokozaki, Yu-Ichiro Koma, Manabu Shigeoka, Mari Nishio
We review the significance of cancer-stromal interactions (CSIs) in the development, morphogenesis and progression of human gastric and esophageal cancer based on the data obtained from co-culture experiments. Orthotopic fibroblasts in the gastric cancer stroma not only promoted their growth by cancer cells but were also responsible for the mobility, morphogenesis and epithelial-to-mesenchymal transition (EMT) of the cancer cells through CSI. Bone marrow-derived mesenchymal stem cells could be part of the origin of cancer-associated fibroblasts (CAFs) of the gastric cancer providing an advantageous microenvironment for the restoration of cancer stem cells with the induction of the EMT...
April 19, 2018: Pathology International
https://www.readbyqxmd.com/read/29669762/yap-taz-initiates-gastric-tumorigenesis-via-upregulation-of-myc
#4
Wonyoung Choi, Jeongsik Kim, Jaeoh Park, Da-Hye Lee, Daehee Hwang, Jeong-Hwan Kim, Hassan Ashktorab, Duane T Smoot, Seon-Young Kim, Chan Choi, Gou Young Koh, Dae-Sik Lim
YAP and TAZ play oncogenic roles in various organs, but the role of YAP/TAZ in gastric cancer remains unclear. Here we show that YAP/TAZ activation initiates gastric tumorigenesis in vivo and verify its significance in human gastric cancer. In mice, YAP/TAZ activation in the pyloric stem cell led to step-wise tumorigenesis. RNA sequencing identified MYC as a decisive target of YAP, which controls MYC at transcriptional and post-transcriptional levels. These mechanisms tightly regulated MYC in homeostatic conditions, but YAP activation altered this balance by impeding miRNA processing, causing a shift towards MYC upregulation...
April 18, 2018: Cancer Research
https://www.readbyqxmd.com/read/29668670/exosomes-released-by-gastric-cancer-cells-induce-transition-of-pericytes-into-cancer-associated-fibroblasts
#5
Xiaofei Ning, Hongran Zhang, Cong Wang, Xiuqi Song
BACKGROUND Cancer-associated fibroblasts (CAFs) are functionally and structurally essential for tumor progression. There are 3 main origins of CAFs: mesenchymal stem cells (MSCs), epithelial-to-mesenchymal (EMT) transition cells, and tissue-resident cells. Pericytes retain characteristics of progenitor cells and can differentiate into other cells under normal physiological conditions and into myofibroblasts under pathological conditions. Exosomes play an important role in intercellular communication by transferring membrane components and nucleic acids between different cells...
April 18, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29662192/capillary-morphogenesis-gene-2-maintains-gastric-cancer-stem-like-cell-phenotype-by-activating-a-wnt-%C3%AE-catenin-pathway
#6
Chengdong Ji, Lang Yang, Weijing Yi, Dongfang Xiang, Yanxia Wang, Zhihua Zhou, Feng Qian, Yong Ren, Wei Cui, Xia Zhang, Peng Zhang, Ji Ming Wang, Youhong Cui, Xiuwu Bian
A growing body of evidence shows that the development and progression of gastric cancer (GC) is mainly associated to the presence of gastric cancer stem-like cells (GCSLCs). However, it is unclear how GCSLC population is maintained. This study aimed to explore the role of capillary morphogenesis gene 2 (CMG2) in GCSLC maintenance and the relevance to GC progression. We found that CMG2 was highly expressed in GC tissues and the expression levels were associated with the invasion depth and lymph node metastasis of GC, and inversely correlated with the survival of GC patients...
April 17, 2018: Oncogene
https://www.readbyqxmd.com/read/29620292/nik%C3%A2-and-ikk%C3%AE-%C3%A2-binding-protein-contributes-to-gastric-cancer-chemoresistance-by-promoting-epithelial%C3%A2-mesenchymal-transition-through-the-nf%C3%A2-%C3%AE%C2%BAb-signaling-pathway
#7
Zhen-Hua Fu, Shi-Quan Liu, Meng-Bin Qin, Jie-An Huang, Chun-Yan Xu, Wen-Hong Wu, Li-Ye Zhu, Nan Qin, Ming-Yu Lai
Systematic chemotherapy is indispensable for gastric cancer patients with advanced stage disease, but the occurrence of chemoresistance drastically limits treatment effectiveness. There is a tremendous need for identifying the underlying mechanism of chemoresistance. NIK‑ and IKKβ‑binding protein (NIBP) (also known as TRAPPC9, trafficking protein particle complex 9) is a regulator of the cytokine‑induced NF‑κB signaling pathway which has been proven to play pivotal roles in the progression of various malignancies...
March 30, 2018: Oncology Reports
https://www.readbyqxmd.com/read/29604141/pgd2-ptgdr2-signaling-restricts-the-self-renewal-and-tumorigenesis-of-gastric-cancer
#8
Bin Zhang, Qingli Bie, Peipei Wu, Jie Zhang, Benshuai You, Hui Shi, Hui Qian, Wenrong Xu
The antitumor effect of prostaglandin D2 (PGD2) on gastric cancer (GC) has been known for decades. However, the mechanism of PGD2's control of GC growth is unclear. Cancer stem cells (CSCs) are implicated in tumor neovascularization, invasiveness, and therapeutic resistance. Herein, we discovered that signaling between PGD2 and its receptor (PTGDR2) has the ability to restrict the self-renewal of GC cells in vitro and suppress tumor growth and metastasis in vivo. To obtain these findings, we first determined that PGD2 synthase (L-PTGDS) and PTGDR2 expression were lower in GC tissues than adjacent tissues and was associated with the patients' prognosis...
March 31, 2018: Stem Cells
https://www.readbyqxmd.com/read/29559846/frizzled7-promotes-epithelial-to-mesenchymal-transition-and-stemness-via-activating-canonical-wnt-%C3%AE-catenin-pathway-in-gastric-cancer
#9
Guanman Li, Qiao Su, Haibo Liu, Dong Wang, Wenhui Zhang, Zhenhai Lu, Yu Chen, Xiaohui Huang, Wen Li, Changhua Zhang, Yulong He, Li Fu, Jiong Bi
Aberrant activation of Wnt signaling is a crucial event in tumor development and metastasis. Wnt signaling is commonly divided into canonical and non-canonical signaling pathways based on whether β-catenin is activated (canonical). The two signaling pathways are initiated by Wnt ligand binding to the surface Frizzled (FZD) receptors, and regulate cancer stem cell self-renewal and epithelial-mesenchymal transition (EMT). Frizzled 7 (FZD7), a member of Frizzled family, promotes cell proliferation and invasiveness in many cancers, suggesting that FZD7 transmitting Wnt signaling is important for driving cancer growth...
2018: International Journal of Biological Sciences
https://www.readbyqxmd.com/read/29552623/translating-developmental-principles-to-generate-human-gastric-organoids
#10
REVIEW
Alexandra K Eicher, H Matthew Berns, James M Wells
Gastric diseases, including peptic ulcer disease and gastric cancer, are highly prevalent in human beings. Despite this, the cellular biology of the stomach remains poorly understood relative to other gastrointestinal organs such as the liver, intestine, and colon. In particular, little is known about the molecular basis of stomach development and the differentiation of gastric lineages. Although animal models are useful for studying gastric development, function, and disease, there are major structural and physiological differences in human stomachs that render these models insufficient...
March 2018: Cellular and Molecular Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29552326/research-progress-on-the-forkhead-box-c1
#11
REVIEW
Jinhua Wang, Wan Li, Xiangjin Zheng, Xiaocong Pang, Guanhua Du
FOXC1 is a vital member of FOX families which play important roles in biological processes including proliferation, differentiation, apoptosis, migration, invasion, metabolism, and longevity. Here we are focusing on roles of FOXC1 and their mechanisms in cancers. FOXC1 promoted progress of many cancers, such as breast cancer (especially basal-like breast cancer), hepatocellular carcinoma, gastric cancer and so on. FOXC1 was also found to be associated with drug resistance of cancers. FOXC1 promoted metastasis of cancers by increasing expression of MMP7, NEDD9 and Snail...
February 23, 2018: Oncotarget
https://www.readbyqxmd.com/read/29532558/therapeutic-strategies-for-afatinib-resistant-lung-cancer-harboring-her2-alterations
#12
Hidejiro Torigoe, Kazuhiko Shien, Tatsuaki Takeda, Takahiro Yoshioka, Kei Namba, Hiroki Sato, Ken Suzawa, Hiromasa Yamamoto, Junichi Soh, Masakiyo Sakaguchi, Shuta Tomida, Kazunori Tsukuda, Shinichiro Miyoshi, Shinichi Toyooka
Human epidermal growth factor receptor 2 (HER2) plays an important role in the pathogenesis of various cancers. HER2 alterations have been suggested to be a therapeutic target in non-small-cell lung cancer (NSCLC), just as in breast and gastric cancers. We previously reported that the pan-HER inhibitor afatinib could be a useful therapeutic agent as HER2-targeted therapy for patients with NSCLC harboring HER2 alterations. However, acquired resistance to afatinib was observed in the clinical setting, similar to the case for other HER inhibitors...
March 13, 2018: Cancer Science
https://www.readbyqxmd.com/read/29528141/multi-omics-analysis-identifies-pathways-and-genes-involved-in-diffuse-type-gastric-carcinogenesis-induced-by-e-cadherin-p53-and-smad4-loss-in-mice
#13
Jun Won Park, Min-Sik Kim, Dominic C Voon, Su-Jin Kim, Jingi Bae, Dong-Gi Mun, Seung-Ik Ko, Hark Kyun Kim, Sang-Won Lee, Dae-Yong Kim
The molecular mechanisms underlying the pathogenesis of diffuse-type gastric cancer (DGC) have not been adequately explored due to a scarcity of appropriate animal models. A recently developed tool well suited for this line of investigation is the Pdx-1-Cre;Cdh1F/+ ;Trp53F/F ;Smad4F/F (pChe PS) mouse model that spontaneously develops metastatic DGC showing nearly complete E-cadherin loss. Here, we performed a proteogenomic analysis to uncover the molecular changes induced by the concurrent targeting of E-cadherin, p53, and Smad4 loss...
March 12, 2018: Molecular Carcinogenesis
https://www.readbyqxmd.com/read/29512256/ibuprofen-reduces-cell-proliferation-through-inhibiting-wnt-%C3%AE-catenin-signaling-pathway-in-gastric-cancer-stem-cells
#14
Hassan Akrami, Behrouz Moradi, Diba Borzabadi Farahani, Kiumars Mehdizadeh
Nowadays, most studies focused on cancer stem cells (CSCs) through their abilities to cause tumorigenicity, drug resistance, and cancer recurrence. On the other side, nonsteroidal anti-inflammatory drugs (NSAIDs) have been taken into consideration because of cheapness and availability. For the reasons mentioned above, we have studied the effect of ibuprofen as an NSAID on CSCs derived from AGS and MKN-45 gastric cancer cell lines to perform effective cancer therapy. We evaluated cell viability, spheroid body formation, monolayer and soft agar colony formation to express the anti-cancer effect of ibuprofen on CSCs...
March 7, 2018: Cell Biology International
https://www.readbyqxmd.com/read/29497929/prognostic-value-of-cyclin-d1-and-cd44-expression-in-gastric-adenocarcinoma
#15
Hanaa M Ibrahim, Abeer M AbdElbary, Salem Y Mohamed, Amira Elwan, Mohamed I Abdelhamid, Amr Ibrahim
BACKGROUND: Worldwide, gastric carcinoma (GC) is the 5th most common malignancies in both sexes representing 6.8% of the total fatalities and is the 3rd leading cause of cancer death representing 8.8% of total fatalities. In Egypt, GC considers the 12th leading cause of cancer death representing 2.2% of the total cancer mortality. A growing body of evidence supports that cancer stem cells (CSCs) are resistant to chemotherapy or radiation, and the cell adhesion molecule CD44 has been identified as a cell surface marker associated with cancer stem cell in several types of tumors including gastric cancer...
March 2, 2018: Journal of Gastrointestinal Cancer
https://www.readbyqxmd.com/read/29467166/polarised-epithelial-monolayers-of-the-gastric-mucosa-reveal-insights-into-mucosal-homeostasis-and-defence-against-infection
#16
Francesco Boccellato, Sarah Woelffling, Aki Imai-Matsushima, Gabriela Sanchez, Christian Goosmann, Monika Schmid, Hilmar Berger, Pau Morey, Christian Denecke, Juergen Ordemann, Thomas F Meyer
OBJECTIVE: Helicobacter pylori causes life-long colonisation of the gastric mucosa, leading to chronic inflammation with increased risk of gastric cancer. Research on the pathogenesis of this infection would strongly benefit from an authentic human in vitro model. DESIGN: Antrum-derived gastric glands from surgery specimens served to establish polarised epithelial monolayers via a transient air-liquid interface culture stage to study cross-talk with H. pylori and the adjacent stroma...
February 21, 2018: Gut
https://www.readbyqxmd.com/read/29463907/acid-and-the-basis-for-cellular-plasticity-and-reprogramming-in-gastric-repair-and-cancer
#17
REVIEW
José B Sáenz, Jason C Mills
Subjected to countless daily injuries, the stomach still functions as a remarkably efficient digestive organ and microbial filter. In this Review, we follow the lead of the earliest gastroenterologists who were fascinated by the antiseptic and digestive powers of gastric secretions. We propose that it is easiest to understand how the stomach responds to injury by stressing the central role of the most important gastric secretion, acid. The stomach follows two basic patterns of adaptation. The superficial response is a pattern whereby the surface epithelial cells migrate and rapidly proliferate to repair erosions induced by acid or other irritants...
February 21, 2018: Nature Reviews. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/29441735/the-role-of-mmu-mir-155-5p-nf-%C3%AE%C2%BAb-signaling-in-the-education-of-bone-marrow-derived-mesenchymal-stem-cells-by-gastric-cancer-cells
#18
Mei Wang, Fang Yang, Rong Qiu, Mengchu Zhu, Huiling Zhang, Wenrong Xu, Bo Shen, Wei Zhu
Bone marrow-derived mesenchymal stem cells (BM-MSCs) are important precursors of tumor stromal cells. Previously, we have demonstrated that miR-155-5p inhibition directly induced transition of BM-MSCs into gastric cancer-associated MSCs. Whether miR-155-5p is involved in the education of BM-MSCs by gastric cancer cells has not been established. Murine BM-MSCs (mMSCs) were isolated and grown in conditioned medium derived from gastric cancer cell line MFC (MFC-CM). The tumor-promoting phenotype and function of mMSCs were detected by immunofluorescence staining, quantitative reverse transcription-polymerase chain reaction (qRT-PCR), cell colony formation assay, transwell migration, and invasion assays...
February 14, 2018: Cancer Medicine
https://www.readbyqxmd.com/read/29435053/rkip-and-peroxiredoxin-2-expression-predicts-the-proliferative-potential-of-gastric-cancer-stem-cells
#19
Shao-Feng Yang, Ran Ma, Li-Li Pan, Jing Cao, Nan Sheng
Gastric cancer is associated with a high mortality rate, with the development of gastric cancer stem cells underlying this. Gastric cancer stem cells are responsible for tumor initiation, progression and recurrence. However, the link between gastric cancer and gastric cancer stem cells remains to be fully understood. Murine models mimic a human microenvironment more accurately than in vitro studies and are useful models for understanding the behavior of different markers. The present study compared the expression of cluster of differentiation 44 (CD44), a stem cell marker, with the expression of other cancer-associated markers, including Raf kinase inhibitor protein (RKIP) and peroxiredoxin 2, in different pathological conditions of gastric cancer development using histological, immunohistological and western blot analyses...
March 2018: Oncology Letters
https://www.readbyqxmd.com/read/29435040/prostate-stem-cell-antigen-is-expressed-in-normal-and-malignant-human-brain-tissues
#20
Hiroe Ono, Hiromi Sakamoto, Teruhiko Yoshida, Norihisa Saeki
Prostate stem cell antigen (PSCA) is a glycosylphosphatidylinositol (GPI)-anchored cell surface protein and exhibits an organ-dependent expression pattern in cancer. PSCA is upregulated in prostate cancer and downregulated in gastric cancer. PSCA is expressed in a variety of human organs. Although certain studies previously demonstrated its expression in the mammalian and avian brain, its expression in the human brain has not been thoroughly elucidated. Additionally, it was previously reported that PSCA is weakly expressed in the astrocytes of the normal human brain but aberrantly expressed in glioma, suggesting that PSCA is a promising target of glioma therapy and prostate cancer therapy...
March 2018: Oncology Letters
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