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https://www.readbyqxmd.com/read/29780543/go-guided-direct-growth-of-highly-oriented-metal-organic-framework-nanosheet-membranes-for-h-2-co-2-separation
#1
Yujia Li, Haiou Liu, Huanting Wang, Jieshan Qiu, Xiongfu Zhang
Highly oriented, ultrathin metal-organic framework (MOF) membranes are attractive for practical separation applications, but the scalable preparation of such membranes especially on standard tubular supports remains a huge challenge. Here we report a novel bottom-up strategy for directly growing a highly oriented Zn2 (bIm)4 (bIm = benzimidazole) ZIF nanosheet tubular membrane, based on graphene oxide (GO) guided self-conversion of ZnO nanoparticles (NPs). Through our approach, a thin layer of ZnO NPs confined between a substrate and a GO ultrathin layer self-converts into a highly oriented Zn2 (bIm)4 nanosheet membrane...
May 7, 2018: Chemical Science
https://www.readbyqxmd.com/read/29778987/effect-of-ethanol-dissolved-rhodamine-b-marker-on-mechanical-properties-of-non-simplified-adhesives
#2
Camila Moreira Machado, Odair Bim Júnior, Marina Ciccone Giacomini, Márcia Sirlene Zardin Graeff, Fernanda Cristina Pimentel Garcia, Daniela Rios, Heitor Marques Honório, Linda Wang
OBJECTIVES: Rhodamine B (RB) is commonly used to evaluate dental polymers, including dental bonding systems (DBS). For reliability assessments, its effect should not only allow visualization of the dentin-polymer interface but also must not interfere with the bonding of the DBS to dentin as measured by the microtensile bond strength and hardness tests. MATERIAL AND METHODS: Flat human dentin surfaces were prepared and randomly distributed (n = 10) into six groups: Adper Scotchbond Multi-Purpose (MP) or Clearfil SE Bond (SE) in concentrations of none/control, 0...
May 17, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29776060/barriers-to-front-propagation-in-laminar-three-dimensional-fluid-flows
#3
Minh Doan, J J Simons, Katherine Lilienthal, Tom Solomon, Kevin A Mitchell
We present experiments on one-way barriers that block reaction fronts in a fully three-dimensional (3D) fluid flow. Fluorescent Belousov-Zhabotinsky reaction fronts are imaged with laser-scanning in a laminar, overlapping vortex flow. The barriers are analyzed with a 3D extension to burning invariant manifold (BIM) theory that was previously applied to two-dimensional advection-reaction-diffusion processes. We discover tube and sheet barriers that guide the front evolution. The experimentally determined barriers are explained by BIMs calculated from a model of the flow...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29775995/phosphorylation-alters-bim-mediated-mcl-1-stabilization-and-priming
#4
Jason E Conage-Pough, Lawrence H Boise
Mcl-1 is a highly labile protein, subject to extensive posttranslational regulation. This distinguishes Mcl-1 from other anti-apoptotic proteins and necessitates further study to better understand how interactions with pro-apoptotic Bcl-2 proteins affect its regulation. One such protein, Bim, is known to stabilize Mcl-1, and Bim phosphorylation has been associated with increased Mcl-1 binding. Consequently, we investigated the potential impact of Bim phosphorylation on Mcl-1 stability. We found that Bim stabilizes and primes Mcl-1 in RPCI-WM1 cells and is constitutively phosphorylated...
May 18, 2018: FEBS Journal
https://www.readbyqxmd.com/read/29774773/mir-711-induced-down-regulation-of-angiopoietin-1-mediates-neuronal-cell-death
#5
Boris Sabirzhanov, Alan Faden, Taryn Aubrecht, Rebecca Henry, Ethan Glaser, Bogdan A Stoica
Angiopoietin-1 (Ang-1) is a well-known endothelial growth factor but its effects on neurons have yet to be elucidated. We show that Ang-1 is rapidly down-regulated in the injured brain after controlled cortical impact (CCI), a mouse experimental TBI model and in etoposide-induced neuronal apoptosis in vitro. Ang-1 treatment inhibits etoposide-induced up-regulation of pro-apoptotic Bcl-2 family members Noxa, Puma, Bim, and Bax; reduces markers of caspase-dependent (cytochrome c release/caspase activation) and caspase-independent (apoptosis-inducing factor release) pathways; and limits neuronal cell death...
May 18, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29771424/knockdown-of-plk1-inhibits-invasion-and-promotes-apoptosis-in-glioma-cells-through-regulating-autophagy
#6
Z-Y Wu, N Wei
OBJECTIVE: Polo like kinase 1 (PLK1), an oncogene, is a ubiquitously expressed serine/threonine protein kinase. We aimed at investigating the role of PLK1 in glioma. PATIENTS AND METHODS: Clinical glioma specimens were obtained from Zhejiang Hospital (Hangzhou, Zhejiang, China). The mRNA and protein levels of PLK1 in glioma tissues and different glioma cells were analyzed by Real-time PCR and Western blot, respectively. The expression of PLK1 protein in glioma tissues was also determined by immunohistochemistry staining...
May 2018: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29769415/upregulation-of-microrna-340-promotes-osteosarcoma-cell-apoptosis-while-suppressing-proliferation-migration-and-invasion-by-inactivating-the-ctnnb1-mediated-notch-signaling-pathway
#7
Bao-Long Pan, Ling Wu, Li Pan, Yu-Xi Yang, Hu-Huan Li, Yan-Juan Dai, Zi-Qian He, Ling Tan, You-Guang Huang, Zong-Wu Tong, Jun-Long Liao
Osteosarcoma (OS) is the most common histological form of primary bone cancer. It is most prevalent in teenagers and young adults. This study aims at exploring the regulatory effect of microRNA-340 (miR-340) on OS cell proliferation, invasion, migration and apoptosis via regulating the Notch signaling pathway by targeting CTNNB1. OS tissues belonging to 45 patients and normal femoral head tissues of 45 amputees were selected. Cells were allocated to different groups. In Situ hybridization was performed to determine the positive rate of miR-340 expression while immunohistochemistry was used to determine that of CTNNB1 and B-cell lymphoma 2 (Bcl-2)...
May 16, 2018: Bioscience Reports
https://www.readbyqxmd.com/read/29769260/bim-regulates-the-survival-and-suppressive-capability-of-cd8-foxp3-regulatory-t-cells-during-murine-gvhd
#8
Kimberle Agle, Benjamin G Vincent, Clint Piper, Ludovic Belle, Vivian Zhou, Warren Shlomchik, Jonathan S Serody, William R Drobyski
CD8+ Foxp3+ T cells (Tregs) are a potent regulatory population whose functional and ontological similarities to CD4+ Fox3+ T cells have not been well delineated. Using an experimental model of graft versus host disease (GVHD), we observed that CD8+ Tregs were significantly less potent than CD4+ Tregs for the suppression of GVHD. To define the mechanistic basis for this observation, we examined the T cell repertoire and the transcriptional profile of in vivo-derived CD4+ and CD8+ Tregs that emerged early during this disease...
May 16, 2018: Blood
https://www.readbyqxmd.com/read/29767411/mek1-2-inhibition-by-binimetinib-is-effective-as-a-single-agent-and-potentiates-the-actions-of-venetoclax-and-abt-737-under-conditions-that-mimic-the-chronic-lymphocytic-leukaemia-cll-tumour-microenvironment
#9
Kyle Crassini, Yandong Shen, William S Stevenson, Richard Christopherson, Chris Ward, Stephen P Mulligan, O Giles Best
The survival and proliferation of chronic lymphocytic leukaemia (CLL) cells is driven by multiple signalling pathways, including those mediated by the B cell, Toll-like and chemokine receptors. Many of these pathways converge on the same signalling molecules, including those involved in the Raf-1/MEK/Erk1/2-MAPK pathway. We investigated the effects of the MEK1/2 (also termed MAP2K1/2) inhibitor, binimetinib, against CLL cells cultured under conditions that mimic aspects of the tumour microenvironment. Binimetinib blocked CLL cell survival induced by stroma-conditioned media and phorbol myristylate (PMA)...
May 16, 2018: British Journal of Haematology
https://www.readbyqxmd.com/read/29767258/pd-l1-mrna-expression-in-egfr-mutant-lung-adenocarcinoma
#10
Kazutoshi Isobe, Atsushi Kakimoto, Tetuo Mikami, Kyohei Kaburaki, Hiroshi Kobayashi, Takahiro Yoshizawa, Yuta Nakano, Takashi Makino, Hajime Otsuka, Go Sano, Keishi Sugino, Susumu Sakamoto, Yujiro Takai, Naobumi Tochigi, Akira Iyoda, Sakae Homma
Molecular mechanisms of programmed death-ligand 1 (PD-L1) mRNA expression and roles of apoptosis and biomarkers are poorly understood in epidermal growth factor receptor (EGFR)-mutant lung adenocarcinoma patients. Thirty-three patients with recurrent postoperative EGFR-mutant lung adenocarcinoma (exon 19 deletion in 16, L858R in 15, G719C in 2 patients) treated with gefitinib were studied. PD-L1 mRNA expression of formalin-fixed paraffin-embedded paratumoral and intratumoral tissues was quantified by PCR. Correlations of PD-L1 mRNA expression with BIM, p53 upregulated modular of apoptosis (PUMA), human epidermal growth factor receptor 2 (HER2), mesenchymal-epithelial transition (MET), EGFR, and vascular endothelial growth factor A (VEGFA) were determined...
May 16, 2018: Oncology Reports
https://www.readbyqxmd.com/read/29760660/ophiopogonin-d-a-natural-product-from-radix-ophiopogonis-induces-in-vitro-and-in-vivo-ripk1-dependent-and-caspase-independent-apoptotic-death-in-androgen-independent-human-prostate-cancer-cells
#11
Zongliang Lu, He Wang, Mingxing Zhu, Wei Song, Jiajia Wang, Changpeng Wu, Ya Kong, Jing Guo, Na Li, Jie Liu, Yanwu Li, Hongxia Xu
Objective: The purpose of this study was to evaluate the anticancer effects of Ophiopogonin D' (OPD', a natural product extracted from a traditional Chinese medicine ( Radix Ophiopogonis ) against androgen-independent prostate cancer cells and to explore the underlying molecular mechanism(s) of action. Methods: The CCK-8 assay was used to assess the viability of prostate cancer cells. The cell morphology was examined by an ultrastructural analysis via transmission electron microscopy. Cells in apoptosis (early and late stages) were detected using an Annexin V-FITC/propidium iodide kit with a FACSCaliber flow cytometer...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29757198/drug-delivery-system-for-emodin-based-on-mesoporous-silica-sba-15
#12
Tamara Krajnović, Danijela Maksimović-Ivanić, Sanja Mijatović, Dijana Drača, Katharina Wolf, David Edeler, Ludger A Wessjohann, Goran N Kaluđerović
In this study mesoporous silica SBA-15 was evaluated as a vehicle for the transport of cytotoxic natural product emodin (EO). SBA-15 was loaded with different quantities of EO (SBA-15|EO1⁻SBA-15|EO5: 8⁻36%) and characterized by traditional methods. Several parameters (stabilities) and the in vitro behavior on tumor cell lines (melanoma A375, B16 and B16F10) were investigated. SBA-15 suppresses EO release in extremely acidic milieu, pointing out that EO will not be discharged in the stomach. Furthermore, SBA-15 protects EO from photodecomposition...
May 12, 2018: Nanomaterials
https://www.readbyqxmd.com/read/29754432/bim-determines-the-number-of-merocytic-dendritic-cells-a-cell-type-that-breaks-immune-tolerance
#13
Cindy Audiger, Sylvie Lesage
In contrast to conventional dendritic cells (cDC), when merocytic dendritic cells (mcDC) present antigens derived from apoptotic bodies, T cell anergy is reversed rather than induced, a process that promotes autoimmunity. Interestingly, mcDC are present in higher proportion in type 1 diabetes-prone NOD mice than in autoimmune-resistant B6 and BALB/c mice, and the Insulin-dependent diabetes 13 locus is linked to mcDC proportion. Therefore, mcDC are notably associated with susceptibility to autoimmune diabetes...
May 13, 2018: Immunology and Cell Biology
https://www.readbyqxmd.com/read/29748021/egfr-tkis-plus-chemotherapy-demonstrated-superior-efficacy-than-egfr-tkis-alone-as-first-line-setting-in-advanced-nsclc-patients-with-egfr-mutation-and-bim-deletion-polymorphism
#14
Sangtian Liu, Yayi He, Tao Jiang, Shengxiang Ren, Fei Zhou, Chao Zhao, Xuefei Li, Jie Zhang, Chunxia Su, Xiaoxia Chen, Weijing Cai, Guanghui Gao, Wei Li, Fengying Wu, Jiayu Li, Jing Zhao, Qiong Hu, Mingchuan Zhao, Caicun Zhou, Fred R Hirsch
BACKGROUND: Non-small-cell lung cancer (NSCLC) patients with both epidermal growth factor receptor (EGFR) positive mutation and B-cell chronic lymphocytic leukemia/lymphoma-like 11 (BIM) deletion polymorphism had a poor clinical response to EGFR-tyrosine kinase inhibitors (TKIs). The current study aimed to investigate the clinical efficacy and tolerability of EGFR-TKIs plus chemotherapy versus EGFR-TKIs alone as first-line treatment in advanced NSCLC patients with EGFR mutations and BIM deletion polymorphism...
June 2018: Lung Cancer: Journal of the International Association for the Study of Lung Cancer
https://www.readbyqxmd.com/read/29743821/blockade-of-itga2-induces-apoptosis-and-inhibits-cell-migration-in-gastric-cancer
#15
Yu-Chang Chuang, Hsin-Yi Wu, Yu-Ling Lin, Shey-Cherng Tzou, Cheng-Hsun Chuang, Ting-Yan Jian, Pin-Rong Chen, Yuan-Ching Chang, Chi-Hsin Lin, Tse-Hung Huang, Chao-Ching Wang, Yi-Lin Chan, Kuang-Wen Liao
Background: Gastric cancer is currently the fourth leading cause of cancer-related death worldwide. Gastric cancer is often diagnosed at advanced stages and the outcome of the treatment is often poor. Therefore, identifying new therapeutic targets for this cancer is urgently needed. Integrin alpha 2 (ITGA2) subunit and the beta 1 subunit form a heterodimer for a transmembrane receptor for extracellular matrix, is an important molecule involved in tumor cell proliferation, survival and migration...
2018: Biological Procedures Online
https://www.readbyqxmd.com/read/29743589/dual-inhibition-of-bcl-xl-and-mcl-1-is-required-to-induce-tumour-regression-in-lung-squamous-cell-carcinomas-sensitive-to-fgfr-inhibition
#16
Clare E Weeden, Casey Ah-Cann, Aliaksei Z Holik, Julie Pasquet, Jean-Marc Garnier, Delphine Merino, Guillaume Lessene, Marie-Liesse Asselin-Labat
Genetic alterations in the fibroblast growth factor receptors (FGFRs) have been described in multiple solid tumours including bladder cancer, head and neck and lung squamous cell carcinoma (SqCC). However, recent clinical trials showed limited efficacy of FGFR-targeted therapy in lung SqCC, suggesting combination therapy may be necessary to improve patient outcomes. Here we demonstrate that FGFR therapy primes SqCC for cell death by increasing the expression of the pro-apoptotic protein BIM. We therefore hypothesised that combining BH3-mimetics, potent inhibitors of pro-survival proteins, with FGFR-targeted therapy may enhance the killing of SqCC cells...
May 10, 2018: Oncogene
https://www.readbyqxmd.com/read/29742512/lncrna-mt1jp-suppresses-gastric-cancer-cell-proliferation-and-migration-through-mt1jp-mir-214-3p-runx3-axis
#17
Ying Xu, Guohua Zhang, Chen Zou, Heng Zhang, Zhigang Gong, Weixin Wang, Gui Ma, Pengcheng Jiang, Wenbo Zhang
BACKGROUND/AIMS: Emerging evidence points towards an important role of long noncoding RNAs (lncRNAs) in the tumorigenesis and progression of gastric cancer (GC). MT1JP has recently been reported to be differentially expressed and act as a tumor suppressor in different tumors, with its mechanisms not fully understood in GC. METHODS: RT-qPCR was used to detect the expression of MT1JP, miR-214-3p and RUNX3 in tumor tissues and cell lines of GC. The CCK-8 assay, colony formation, Transwell assay and wound healing assay were used to evaluate the proliferation, invasion and migration of GC cells, respectively...
May 5, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29738610/lmp2-immunoproteasome-promotes-lymphocyte-survival-by-degrading-apoptotic-bh3-only-proteins
#18
Damien Zanker, Kenneth Pang, Sara Oveissi, Chunni Lu, Pierre Faou, Cameron Nowell, George Williams Mbogo, Sebastian Carotta, Cathy Quillici, Guna Karupiah, Margaret Hibbs, Stephen L Nutt, Paul Neeson, Hamsa Puthalakath, Weisan Chen
The role of the immunoproteasome is perceived as confined to adaptive immune responses given its ability to produce peptides ideal for MHC Class-I binding. Here, we demonstrate that the immunoproteasome subunit, LMP2, has functions beyond its immunomodulatory role. Using LMP2-deficient mice, we demonstrate that LMP2 is crucial for lymphocyte development and survival in the periphery. Moreover, LMP2-deficient lymphocytes show impaired degradation of key BH3-only proteins, resulting in elevated levels of pro-apoptotic BIM and increased cell death...
May 8, 2018: Immunology and Cell Biology
https://www.readbyqxmd.com/read/29734730/glioma-associated-oncogene-homolog-inhibitors-have-the-potential-of-suppressing-cancer-stem-cells-of-breast-cancer
#19
Kuo-Shyang Jeng, Chi-Juei Jeng, I-Shyan Sheen, Szu-Hua Wu, Ssu-Jung Lu, Chih-Hsuan Wang, Chiung-Fang Chang
Overexpression of Sonic Hedgehog signaling (Shh) pathway molecules is associated with invasiveness and recurrence in breast carcinoma. Therefore, inhibition of the Shh pathway downstream molecule Glioma-associated Oncogene Homolog (Gli) was investigated for its ability to reduce progression and invasiveness of patient-derived breast cancer cells and cell lines. Human primary breast cancer T2 cells with high expression of Shh signaling pathway molecules were compared with breast cancer line MDA-MB-231 cells...
May 5, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29733883/distinct-apoptotic-blocks-mediate-resistance-to-panher-inhibitors-in-her2-breast-cancer-cells
#20
Bahriye Karakas, Yeliz Ozmay, Huveyda Basaga, Ozgur Gul, Ozgur Kutuk
Despite the development of novel targeted therapies, de novo or acquired chemoresistance remains a significant factor for treatment failure in breast cancer therapeutics. Neratinib and dacomitinib are irreversible panHER inhibitors, which block their autophosphorylation and downstream signaling. Moreover, neratinib and dacomitinib have been shown to activate cell death in HER2-overexpressing cell lines. Here we showed that increased MCL1 and decreased BIM and PUMA mediated resistance to neratinib in ZR-75-30 and SKBR3 cells while increased BCL-XL and BCL-2 and decreased BIM and PUMA promoted neratinib resistance in BT474 cells...
May 4, 2018: Biochimica et Biophysica Acta
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