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Hua Wang, Bin Huang, Bai Mou Li, Kai Yuan Cao, Chen Qiang Mo, Shuang Jian Jiang, Jin Cheng Pan, Zong Ren Wang, Huan Yi Lin, Dao Hu Wang, Shao Peng Qiu
The zinc finger E-box-binding homeobox 1 (ZEB1) induced the epithelial-mesenchymal transition (EMT) and altered ZEB1 expression could lead to aggressive and cancer stem cell (CSC) phenotypes in various cancers. Tissue specimens from 96 prostate cancer patients were collected for immunohistochemistry and CD34/periodic acid-Schiff double staining. Prostate cancer cells were subjected to ZEB1 knockdown or overexpression and assessment of the effects on vasculogenic mimicry formation in vitro and in vivo. The underlying molecular events of ZEB1-induced vasculogenic mimicry formation in prostate cancer were then explored...
May 12, 2018: Journal of Cellular and Molecular Medicine
Jia Lin Er, Pei Ni Goh, Chen Yuan Lee, Ying Jie Tan, Ling-Wei Hii, Chun Wai Mai, Felicia Fei-Lei Chung, Chee-Onn Leong
Pancreatic adenocarcinoma (PDAC) is a highly aggressive cancer with a high chance of recurrence, limited treatment options, and poor prognosis. A recent study has classified pancreatic cancers into four molecular subtypes: (1) squamous, (2) immunogenic, (3) pancreatic progenitor and (4) aberrantly differentiated endocrine exocrine. Among all the subtypes, the squamous subtype has the worst prognosis. This study aims to utilize large scale genomic datasets and computational systems biology to identify potential drugs targeting the squamous subtype of PDAC through combination therapy...
May 8, 2018: Apoptosis: An International Journal on Programmed Cell Death
Fei Chen, Liyuan Zhu, Yiling Zhang, Dhiraj Kumar, Guangli Cao, Xiaolong Hu, Zi Liang, Sulan Kuang, Renyu Xue, Chengliang Gong
Bombyx mori cypovirus (BmCPV), a member of the Reoviridae, specifically infects silkworms and causes extensive economic losses to the sericulture industry. To date, the entry mechanism of BmCPV into cells is unclear. Here we used electron microscopy to study the route of entry of BmCPV into cells, and the results demonstrated that the entry of BmCPV into BmN cells was mediated by endocytosis. Blocking the entry pathway with four endocytosis inhibitors, including dansylcadaverine, chlorpromazine, genistein, and PP2, significantly decreased the infectivity of BmCPV...
May 8, 2018: Scientific Reports
Zhonghua Wang, Aijun Jiang, Jingwei Mei, Xinyan Zhang
BACKGROUND: The steroid hormone 1α,25(OH)2-vitamin D3 (1,25-D3) induced some biological responses through activation of MAPK cascades in various cell types. It seems that 1,25-D3 plays different roles at different stages of proliferating, differentiating, and differentiated C2C12 cells. We wanted to detect the effect of 1,25-D3 on myogenic differentiation and the role of ERK1/2 in differentiating stage induced by 2% horse serum with 1,25-D3. METHODS: In this study, cells were induced to differentiate with 2% horse serum until the 7th day (with addition of 1,25-D3 every two days)...
May 1, 2018: Clinical Laboratory
Zhangfei Shen, Xiaoyuan Yang, Yu Chen, Liangen Shi
Bombyx mori neuropeptide G protein-coupled receptor (BNGR)-A27 is a specific receptor for B. mori capability (CAPA) periviscerokinin (PVK), that is, Bom-CAPA-PVK receptor 2. Upon stimulation of Bom-CAPA-PVK-1 or -PVK-2, Bom-CAPA-PVK receptor 2 significantly increases cAMP-response element-controlled luciferase activity and Ca2+ mobilization in a Gq inhibitor-sensitive manner. However, the underlying mechanism(s) for CAPA/CAPA receptor system mediation of extracellular signal-regulated kinases1/2 (ERK1/2) activation remains to be explained further...
May 3, 2018: Insect Biochemistry and Molecular Biology
Zhong-Yan Zhou, Bin Huang, Shang Li, Xiao-Hui Huang, Jing-Yi Tang, Yiu Wa Kwan, Pui Man Hoi, Simon Ming-Yuen Lee
Impaired vascular integrity leads to serious cerebral vascular diseases such as intracerebral hemorrhage (ICH). In addition, high-dose statin therapy is suggested to cause increased ICH risk due to unclear effects of general inhibition of 3-hydroxy-3-methylglutaryl-CoA reductase (HMGCR) on the vascular system. Here we evaluated the protective effects of sodium tanshinone IIA sulfonate (STS), which has high efficacy and safety in clinical studies of ischemic stroke, by using atorvastatin (Ator) induced ICH zebrafish embryos and human umbilical vein endothelial cells (HUVECs)...
May 3, 2018: Toxicology and Applied Pharmacology
Belén Mezquita, Pau Mezquita, Montserrat Pau, Laura Gasa, Lourdes Navarro, Mireia Samitier, Miquel Pons, Cristóbal Mezquita
All-trans-retinoic acid (RA), the active metabolite of vitamin A, can reduce the malignant phenotype in some types of cancer and paradoxically also can promote cancer growth and invasion in others. For instance, it has been reported that RA induces tumor suppression in tumor xenografts of MDA-MB-468 breast cancer cells while increasing tumor growth and metastases in xenografts of MDA-MB-231 breast cancer cells. The signaling pathways involved in the pro-invasive action of retinoic acid remain mostly unknown...
May 4, 2018: Scientific Reports
Yong Zhong Xu, Thusanth Thuraisingam, Cynthia Kanagaratham, Shao Tao, Danuta Radzioch
Studies have demonstrated that the solute carrier family 11 member 1 (SLC11A1) is heavily glycosylated and phosphorylated in macrophages. However, the mechanisms of SLC11A1 phosphorylation, and the effects of phosphorylation on SLC11A1 activity remain largely unknown. Here, the tyrosine phosphorylation of SLC11A1 is observed in SLC11A1-expressing U937 cells when differentiated into macrophages by phorbol myristate acetate (PMA). The phosphorylation of SLC11A1 is almost completely blocked by treatment with PP2, a selective inhibitor of Src family kinases...
2018: PloS One
Wei Li, Ling Xu, Xiaofang Che, Haizhou Li, Ye Zhang, Na Song, Ti Wen, Kezuo Hou, Yi Yang, Lu Zhou, Xing Xin, Lu Xu, Xue Zeng, Sha Shi, Yunpeng Liu, Xiujuan Qu, Yuee Teng
BACKGROUND: Tamoxifen is a frontline therapy for estrogen receptor (ER)-positive breast cancer in premenopausal women. However, many patients develop resistance to tamoxifen, and the mechanism underlying tamoxifen resistance is not well understood. Here we examined whether ER-c-Src-HER2 complex formation is involved in tamoxifen resistance. METHODS: MTT and colony formation assays were used to measure cell viability and proliferation. Western blot was used to detect protein expression and protein complex formations were detected by immunoprecipitation and immunofluorescence...
May 2, 2018: BMC Cancer
Liqi Tong, G Aleph Prieto, Carl W Cotman
BACKGROUND: Brain inflammation including increases in inflammatory cytokines such as IL-1β is widely believed to contribute to the pathophysiology of Alzheimer's disease. Although IL-1β-induced impairments in long-term potentiation (LTP) in acute hippocampal slices and memory functions in vivo have been well documented, the neuron-specific molecular mechanisms of IL-1β-mediated impairments of LTP and memory remain unclear. METHODS: This study uses an in vitro approach in primary hippocampal neurons to evaluate the effect of IL-1β on chemical LTP (cLTP)-induced structural plasticity and signaling...
April 30, 2018: Journal of Neuroinflammation
Tingting Chen, Ya Wang, Tingting Zhang, Baofeng Zhang, Lei Chen, Liandong Zhao, Ling Chen
Simvastatin (SV) enhances glutamate release and synaptic plasticity in hippocampal CA1 region upon activation of α7 nicotinic acetylcholine receptor (α7nAChR). In this study, we examined the effects of SV on the functional activity of α7nAChR on CA1 pyramidal cells using patch-clamp recording and explored the underlying mechanisms. We found that the treatment of hippocampal slices with SV for 2 h induced a dose-dependent increase in the amplitude of ACh-evoked inward currents ( I ACh ) and the level of α7nAChR protein on the cell membrane without change in the level of α7nAChR phosphorylation...
2018: Frontiers in Pharmacology
Kubra Agirman Torenek, Ozkan Miloglu, Osman Murat Bilge
OBJECTIVES: The purpose of this study is to evaluate the compatibility of ultrasonographic data with hand-wrist radiographs taken to determine the extent of pubertal growth and bone age in patients and investigate the usability of ionizing radiation-free ultrasonography instead of conventional radiography. METHODS: In this study, a total of 120 children from 10 to 17 years old (mean age was 168 months ± 27.5 months) were treated with routine radiographs before orthodontic treatment, and ultrasonographic imaging was performed on the wrists the same day...
April 18, 2018: Dento Maxillo Facial Radiology
Yang Cheng, Shuyi Jiang, Jin Yuan, Junxiu Liu, Tommaso Simoncini
Vascular endothelial growth factor C (VEGF-C) accelerates cervical cancer metastasis, while the detailed mechanism remains largely unknown. Recent evidence indicates that microRNA play a crucial role in controlling cancer cell invasiveness. In the present study, we investigated the role of miR-326 in VEGF-C-induced cervical cancer cell invasion. VEGF-C expression was higher and miR-326 was much lower in primary cervical cancer specimens than that in non-cancerous specimens, and a negative correlation between VEGF-C and miR-326 was found...
April 16, 2018: Gynecological Endocrinology
Ya Wang, Tingting Chen, Zihao Yuan, Yajie Zhang, Baofeng Zhang, Liandong Zhao, Ling Chen
Statins by reducing farnesyl-pyrophosphate or farnesyl transferase inhibitors have been demonstrated to enhance spatial memory and long-term potentiation (LTP). The objective of this study was to investigate effects of the synthetic Ras inhibitor S-trans, trans-farnesylthiosalicylic acid (FTS) on spatial cognitive function in adult mice, synaptic plasticity in hippocampal CA1 regions, and NMDA receptor (NMDAr) activity of pyramidal cells. Here, we show that administering FTS (5 mg/kg, i.p.) enhanced spatial cognitive performance, as assessed via Morris water maze and Y-maze tests...
March 22, 2018: Neuropharmacology
Longquan Lou, Ziyi Yu, Yue Wang, Shui Wang, Yi Zhao
Oncogene c-Src has been found to be a potential target for the treatment of triple-negative breast cancer (TNBC). However, the therapeutic effects of the c-Src inhibitor on TNBC patients are controversial to those on cell lines. It remains unclear about the molecular mechanisms that affect the inhibitory effects of the c-Src inhibitor on TNBC. Here, we demonstrated that a specific c-Src inhibitor, PP2 was effective to inhibit phosphorylation of c-Src in four cell lines: T-47D, SK-BR-3, SUM1315MO2, and MDA-MB-231, regardless of hormone receptors and HER-2 expression levels...
March 25, 2018: Cancer Science
Zhenlong Chen, Suellen D'Arc Oliveira, Adriana M Zimnicka, Ying Jiang, Tiffany Sharma, Stone Chen, Orly Lazarov, Marcelo G Bonini, Jacob M Haus, Richard D Minshall
We hypothesized that the maintenance of vascular homeostasis is critically dependent on the expression and reciprocal regulation of caveolin-1 (Cav-1) and endothelial nitric oxide synthase (eNOS) in endothelial cells (ECs). Skeletal muscle biopsies from subjects with type II diabetes showed 50% less Cav-1 and eNOS compared to lean healthy controls. The Cav-1:eNOS expression ratio was 200:1 in primary culture human ECs. Cav-1 siRNA reduced eNOS protein and gene expression in association with a 2-fold increase in eNOS phosphorylation and nitrate production per molecule of eNOS which was reversed in cells overexpressing Adv-Cav-1-GFP...
March 21, 2018: Molecular Biology of the Cell
E V Bouzinova, L Hangaard, C Staehr, A Mazur, A Ferreira, A V Chibalin, S L Sandow, Z Xie, C Aalkjaer, V V Matchkov
AIMS: The Na,K-ATPase is involved in a large number of regulatory activities including cSrc-dependent signalling. Upon inhibition of the Na,K-ATPase with ouabain, cSrc activation is shown to occur in many cell types. This study tests the hypothesis that acute potentiation of agonist-induced contraction by ouabain is mediated through Na,K-ATPase-cSrc signalling-dependent sensitization of vascular smooth muscle cells to Ca2+ . METHODS: Agonist-induced rat mesenteric small artery contraction was examined in vitro under isometric conditions and in vivo in anaesthetized rats...
February 26, 2018: Acta Physiologica
Priyanka Grover, Sritama Nath, Monica D Nye, Ru Zhou, Mohammad Ahmad, Pinku Mukherjee
Pancreatic Ductal Adenocarcinoma (PDA) has a mortality rate that nearly matches its incidence rate. Transforming Growth Factor Beta (TGF-β) is a cytokine with a dual role in tumor development switching from a tumor suppressor to a tumor promoter. There is limited knowledge of how TGF-β function switches during tumorigenesis. Mucin 1 (MUC1) is an aberrantly glycosylated, membrane-bound, glycoprotein that is overexpressed in >80% of PDA cases and is associated with poor prognosis. In PDA, MUC1 promotes tumor progression and metastasis via signaling through its cytoplasmic tail (MUC1-CT) and interacting with other oncogenic signaling molecules...
January 23, 2018: Oncotarget
Layla El Moussawi, Mohamed Chakkour, Sawsan I Kreydiyyeh
Epinephrine, a key stress hormone, is known to affect ion transport in the colon. Stress has been associated with alterations in colonic functions leading to changes in water movements manifested as diarrhea or constipation. Colonic water movement is driven by the Na+-gradient created by the Na+/K+-ATPase. Whether epinephrine acts via an effect on the Na+/K+-ATPase hasn't been studied before. The aim of this work was to investigate the effect of epinephrine on the Na+/K+-ATPase and to elucidate the signaling pathway involved using CaCo-2 cells as a model...
2018: PloS One
Jacqueline R Ha, Ryuhjin Ahn, Harvey W Smith, Valerie Sabourin, Steven Hébert, Eduardo Cepeda Cañedo, Young Kyuen Im, Claudia L Kleinman, William J Muller, Josie Ursini-Siegel
The commonality between most phospho-tyrosine signaling networks is their shared use of adaptor proteins to transduce mitogenic signals. ShcA ( SHC1 ) is one such adaptor protein that employs two phospho-tyrosine binding domains (PTB and SH2) and key phospho-tyrosine residues to promote mammary tumorigenesis. Receptor tyrosine kinases (RTK), such as ErbB2, bind the ShcA PTB domain to promote breast tumorigenesis by engaging Grb2 downstream of the ShcA tyrosine phosphorylation sites to activate AKT/mTOR signaling...
May 2018: Molecular Cancer Research: MCR
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