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https://www.readbyqxmd.com/read/28651420/-effects-of-hypoxia-inducible-factor-1%C3%AE-on-p311-and-its-influence-on-the-migration-of-murine-epidermal-stem-cells
#1
Z D Xu, H S Li, S Wang, W F He, J Wu, G X Luo
Objective: To explore the effects of hypoxia inducible factor-1α (HIF-1α) on P311 and its influence on the migration of murine epidermal stem cells (ESCs) under hypoxia in vitro. Methods: Two kinds of murine ESCs were isolated and obtained from 15 neonatal wild-type C57BL/6J mice and 5 congeneric source P311 gene knock-out mice, respectively. The first passage of cells were used in the following experiments after morphologic observation and detection of expression of cell surface markers CD71 and CD49f with flow cytometer...
May 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/28651365/cathepsin-k-inhibitors-for-osteoporosis-biology-potential-clinical-utility-and-lessons-learned
#2
Matthew T Drake, Bart L Clarke, Merry Jo Oursler, Sundeep Khosla
Cathepsin K is a cysteine protease member of the cathepsin lysosomal protease family. While cathepsin K is highly expressed in osteoclasts, lower levels of cathepsin K are also found in a variety of other tissues. Secretion of cathepsin K from the osteoclast into the sealed osteoclast-bone cell interface results in efficient degradation of type I collagen. The absence of cathepsin K activity in humans results in pycnodysostosis, characterized by increased bone mineral density and fractures. Pharmacological cathepsin K inhibition leads to continuous increases in BMD for up to five years of treatment and improves bone strength at the spine and hip...
June 23, 2017: Endocrine Reviews
https://www.readbyqxmd.com/read/28651359/altered-mirna-and-pirna-profiles-in-cumulus-cells-from-patients-with-diminished-ovarian-reserve
#3
Dawei Chen, Zhiguo Zhang, Beili Chen, Dongmei Ji, Yan Hao, Ping Zhou, Zhaolian Wei, Yunxia Cao
Diminished ovarian reserve (DOR) is defined as decreased number or quality of follicles and oocytes in a woman at childbearing age. It is estimated that up to 10% of women in the general population may suffer from DOR. The present study aims to comprehensively characterize miRNA and piRNA expression profiles in cumulus cells of DOR patients. Cumulus cells were collected from 20 women of similar chronological age who received assisted reproductive technology treatment, 10 with diminished ovarian reserve (DOR), 10 with normal ovarian reserve (NOR)...
June 23, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28651180/does-a-short-term-exposure-to-atrazine-provoke-cellular-senescence-in-chlamydomonas-reinhardtii
#4
Marta Esperanza, Magali Houde, Marta Seoane, Ángeles Cid, Carmen Rioboo
The aim of this study was to investigate the impacts and modes of action of a chemical and nutrient deprivation on the cellular senescence process of Chlamydomonas reinhardtii. Several molecular and cellular parameters related to senescence phenomena were monitored in C. reinhardtii cells exposed for 24h to a sublethal concentration (0.25μM) of the herbicide atrazine and in unexposed 96h cells in an early stationary phase of growth. All endpoints showed the same pattern of response between treatments, except for the intracellular level of calcium, where a significant increase was observed in 24h-exposed cultures compared to 24h-log controls...
June 19, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28651126/tnf-%C3%AE-exerts-cytotoxic-effects-on-multidrug-resistant-breast-cancer-mcf-7-mx-cells-via-a-non-apoptotic-death-pathway
#5
Morteza Ghandadi, Javad Behravan, Khalil Abnous, Melika Ehtesham Gharaee, Fatemeh Mosaffa
Tumor necrosis factor-α (TNF-α) is a cytokine involved in the various physiopathological processes such as autoimmune disorders and inflammation related diseases. Some multidrug resistant (MDR) cancer cell lines including MCF-7/MX are more vulnerable to cytotoxic effects of TNF-α than their parental lines. In this study, breast cancer cell line MCF-7 and its MDR derivative MCF-7/MX were exposed to TNF-α afterward various downstream signaling mediators of TNF-α were analyzed. Although, treatment of MCF-7 cells with TNF-α activated NF-kB and caused RIP1 ubiquitination, TNF-α exposure led to JNK and RIP1 phosphorylation in MCF-7/MX cells...
June 23, 2017: Cytokine
https://www.readbyqxmd.com/read/28651114/isolation-and-functional-interrogation-of-adult-human-prostate-epithelial-stem-cells-at-single-cell-resolution
#6
Wen-Yang Hu, Dan-Ping Hu, Lishi Xie, Ye Li, Shyama Majumdar, Larisa Nonn, Hong Hu, Toshi Shioda, Gail S Prins
Using primary cultures of normal human prostate epithelial cells, we developed a novel prostasphere-based, label-retention assay that permits identification and isolation of stem cells at a single cell level. Their bona fide stem cell nature was corroborated using in vitro and in vivo regenerative assays and documentation of symmetric/asymmetric division. Robust WNT10B and KRT13 levels without E-cadherin or KRT14 staining distinguished individual stem cells from daughter progenitors in spheroids. Following FACS to isolate label-retaining stem cells from label-free progenitors, RNA-seq identified unique gene signatures for the separate populations which may serve as useful biomarkers...
June 16, 2017: Stem Cell Research
https://www.readbyqxmd.com/read/28651104/autophagy-is-an-important-event-for-low-dose-cytarabine-treatment-in-acute-myeloid-leukemia-cells
#7
Liyun Chen, Pei Guo, Yunxiang Zhang, Xiaoyang Li, Peimin Jia, Jianhua Tong, Junmin Li
Cytarabine (Ara-c) has been an important agent in acute myeloid leukemia (AML) treatment for more than 40 years. While, the mechanisms underlying low dose cytarabine (LD Ara-c) is poorly understood. In this study, we investigated the therapeutic effect of LD Ara-C in vitro. U937 and HEL cell lines were treated with increasing dose of Ara-C and showed growth inhibition rates in a time and dose-dependent manner. Treatment with LD Ara-C (50nM) induced a time-dependent increase in expression of microtubule-associated protein light chain 3 (LC3) and beclin1, but degradation of sequestosome1 (p62) in both U937 and HEL cells...
June 16, 2017: Leukemia Research
https://www.readbyqxmd.com/read/28651101/competitive-ligands-facilitate-dissociation-of-the-complex-of-bifunctional-inhibitor-and-protein-kinase
#8
Taavi Ivan, Erki Enkvist, Hedi Sinijarv, Asko Uri
Dissociation of the complex of a ligand and a protein usually follows the kinetic profile of the first order process and the rate of dissociation is not affected by the presence of competitive ligands. We discovered that dissociation of the complex between a bifunctional ligand and a protein kinase (the catalytic subunit of cAMP-dependent protein kinase), an enzyme possessing 2 different substrate binding sites, was accelerated (facilitated) over 50-fold in the presence of competitive ligands at higher concentrations...
June 20, 2017: Biophysical Chemistry
https://www.readbyqxmd.com/read/28651046/a-heparan-sulfate-microarray-reveals-that-heparan-sulfate-protein-binding-exhibit-different-ligand-requirements
#9
Chengli Zong, Andre Venot, Xiuru Li, Weigang Lu, Wenyuan Xiao, Josetti Lynn Wilkes, Catherina L Salanga, Tracy M Handel, Lianchun Wang, Margreet A Wolfert, Geert-Jan Boons
Heparan sulfates (HS) are linear sulfated polysaccharides that modulate a wide range of physiological and disease-processes. Variations in HS epimerization and sulfation provide enormous structural diversity, which is believed to underpin protein binding and regulatory properties. The ligand requirements of HS-binding proteins have, however, been defined in only a few cases. We describe here a synthetic methodology that can rapidly provide a library of well-defined HS oligosaccharides. It is based on the use of modular disaccharides to assemble several selectively protected tetrasaccharides that were subjected to selective chemical modifications such as regioselective O- and N-sulfation and selective de-sulfation...
June 26, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28651018/meta-analysis-of-mirna-expression-profiles-for-prostate-cancer-recurrence-following-radical-prostatectomy
#10
Elnaz Pashaei, Elham Pashaei, Maryam Ahmady, Mustafa Ozen, Nizamettin Aydin
BACKGROUND: Prostate cancer (PCa) is a leading reason of death in men and the most diagnosed malignancies in the western countries at the present time. After radical prostatectomy (RP), nearly 30% of men develop clinical recurrence with high serum prostate-specific antigen levels. An important challenge in PCa research is to identify effective predictors of tumor recurrence. The molecular alterations in microRNAs are associated with PCa initiation and progression. Several miRNA microarray studies have been conducted in recurrence PCa, but the results vary among different studies...
2017: PloS One
https://www.readbyqxmd.com/read/28650960/phosphatidylserine-externalization-necroptotic-bodies-release-and-phagocytosis-during-necroptosis
#11
Sefi Zargarian, Inbar Shlomovitz, Ziv Erlich, Aria Hourizadeh, Yifat Ofir-Birin, Ben A Croker, Neta Regev-Rudzki, Liat Edry-Botzer, Motti Gerlic
Necroptosis is a regulated, nonapoptotic form of cell death initiated by receptor-interacting protein kinase-3 (RIPK3) and mixed lineage kinase domain-like (MLKL) proteins. It is considered to be a form of regulated necrosis, and, by lacking the "find me" and "eat me" signals that are a feature of apoptosis, necroptosis is considered to be inflammatory. One such "eat me" signal observed during apoptosis is the exposure of phosphatidylserine (PS) on the outer plasma membrane. Here, we demonstrate that necroptotic cells also expose PS after phosphorylated mixed lineage kinase-like (pMLKL) translocation to the membrane...
June 26, 2017: PLoS Biology
https://www.readbyqxmd.com/read/28650658/a-potent-selective-and-cell-active-protein-arginine-methyltransferase-5-prmt5-inhibitor-developed-by-structure-based-virtual-screening-and-hit-optimization
#12
Ruifeng Mao, Jingwei Shao, Kongkai Zhu, Yuanyuan Zhang, Hong Ding, Chenhua Zhang, Zhe Shi, Hualiang Jiang, De-Qun Sun, Wenhu Duan, Cheng Luo
PRMT5 plays important roles in diverse cellular processes and is upregulated in several human malignancies. Besides, PRMT5 has been validated as anti-cancer target in mantle cell lymphoma. In this study, we found a potent and selective PRMT5 inhibitor by performing structure-based virtual screening and hit optimization. The identified compound 17 (IC50 = 0.33 μM) exhibited a broad selectivity against a panel of other methyltransferases. The direct binding of 17 to PRMT5 was validated by surface plasmon resonance experiments, with a Kd of 0...
June 26, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28650592/om-lv20-a-novel-peptide-from-odorous-frog-skin-accelerates-wound-healing-in-vitro-and-in-vivo
#13
Xiaojie Li, Ying Wang, Zhirong Zou, Meifeng Yang, Chunyun Wu, Yunshan Su, Jing Tang, Xinwang Yang
The healing of chronic wounds remains a considerable challenge in clinical trials and imposes severe financial and physiological burdens on patients. Many works are being tried to find ideal clinical promoting-wound-healing biomaterials. Small bioactive peptides with low cost and easy production, store and transfer become excellent candidates. Here, we identified a novel peptide (named OM-LV20) from skin secretions of odorous frog Odorrana margaretae. The peptide had an amino acid sequence of 'LVGKLLKGAVGDVCGLLPIC', contained an intramolecular disulfide bridge at the C-terminus, and was produced by posttranslational processing of a 71-residue prepropeptide...
June 26, 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/28650530/microfluidic-based-process-to-sort-cells-efficiently-secreting-a-protein
#14
(no author information available yet)
No abstract text is available yet for this article.
August 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28650465/mcu-dependent-mitochondrial-ca-2-inhibits-nad-sirt3-sod2-pathway-to-promote-ros-production-and-metastasis-of-hcc-cells
#15
T Ren, H Zhang, J Wang, J Zhu, M Jin, Y Wu, X Guo, L Ji, Q Huang, H Zhang, H Yang, J Xing
Mitochondrial Ca(2+) signaling, which is strongly dependent on the mitochondrial Ca(2+) uniporter (MCU) complex, has a series of key roles in physiopathological processes, including energy metabolism, reactive oxygen species (ROS) production and cell apoptosis. However, a mechanistic understanding of how the mitochondrial Ca(2+) signaling is remodeled and its functional roles remains greatly limited in cancers, especially in hepatocellular carcinoma. Here we demonstrated that the MCU complex was dysregulated in hepatocellular carcinoma (HCC) cells and significantly correlated with metastasis and poor prognosis of HCC patients...
June 26, 2017: Oncogene
https://www.readbyqxmd.com/read/28650464/%C3%AE-catenin-downregulates-dicer-to-promote-ovarian-cancer-metastasis
#16
S K Y To, A S C Mak, Y M Eva Fung, C-M Che, S-S Li, W Deng, B Ru, J Zhang, A S T Wong
Ovarian cancer is a nearly uniform lethal disease and its highly aggressive metastatic phenotype portends a poor prognosis. Lack of a well-controlled, relevant experimental model has been a major obstacle to identifying key molecules causing metastasis. Here we describe the creation of a new isogenic model of spontaneous human ovarian cancer metastasis exhibiting opposite phenotypes-highly metastatic (HM) and non-metastatic (NM)-both in vitro and in vivo. HM was unique in its ability to metastasize consistently to the peritoneum, mimicking the major dissemination route of human ovarian cancer...
June 26, 2017: Oncogene
https://www.readbyqxmd.com/read/28650461/a-light-and-calcium-gated-transcription-factor-for-imaging-and-manipulating-activated-neurons
#17
Wenjing Wang, Craig P Wildes, Tanyaporn Pattarabanjird, Mateo I Sanchez, Gordon F Glober, Gillian A Matthews, Kay M Tye, Alice Y Ting
Activity remodels neurons, altering their molecular, structural, and electrical characteristics. To enable the selective characterization and manipulation of these neurons, we present FLARE, an engineered transcription factor that drives expression of fluorescent proteins, opsins, and other genetically encoded tools only in the subset of neurons that experienced activity during a user-defined time window. FLARE senses the coincidence of elevated cytosolic calcium and externally applied blue light, which together produce translocation of a membrane-anchored transcription factor to the nucleus to drive expression of any transgene...
June 26, 2017: Nature Biotechnology
https://www.readbyqxmd.com/read/28650455/clinical-impact-of-nk-cell-reconstitution-after-reduced-intensity-conditioned-unrelated-cord-blood-transplantation-in-patients-with-acute-myeloid-leukemia-analysis-of-a-prospective-phase-ii-multicenter-trial-on-behalf-of-the-soci%C3%A3-t%C3%A3-fran%C3%A3-aise-de-greffe-de
#18
S Nguyen, A Achour, L Souchet, S Vigouroux, P Chevallier, S Furst, A Sirvent, J-O Bay, G Socié, P Ceballos, A Huynh, J Cornillon, S Francois, F Legrand, I Yakoub-Agha, G Michel, N Maillard, G Margueritte, S Maury, M Uzunov, C-E Bulabois, M Michallet, L Clement, C Dauriac, K Bilger, J Lejeune, V Béziat, V Rocha, B Rio, S Chevret, V Vieillard
Unrelated cord blood transplantation (UCBT) after a reduced intensity conditioning regimen (RIC) has extended the use of UCB in elderly patients and those with co-morbidities without an HLA-identical donor, although post-transplant relapse remains a concern in high-risk acute myeloid leukemia (AML) patients. HLA incompatibilities between donor and recipient might enhance the alloreactivity of natural killer (NK) cells after allogeneic hematopoietic stem-cell transplantation (HSCT). We studied the reconstitution of NK cells and KIR-L mismatch in 54 patients who underwent a RIC-UCBT for AML in CR in a prospective phase II clinical trial...
June 26, 2017: Bone Marrow Transplantation
https://www.readbyqxmd.com/read/28650391/proteins-differentially-expressed-in-the-pancreas-of-hepatic-alcohol-dehydrogenase-deficient-deer-mice-fed-ethanol-for-3-months
#19
Kamlesh K Bhopale, Samir M Amer, Lata Kaphalia, Kizhake V Soman, John E Wiktorowicz, Ghulam A Shakeel Ansari, Bhupendra S Kaphalia
OBJECTIVES: The aim of this study was to identify differentially expressed proteins in the pancreatic tissue of hepatic alcohol dehydrogenase-deficient deer mice fed ethanol to understand metabolic basis and mechanism of alcoholic chronic pancreatitis. METHODS: Mice were fed liquid diet containing 3.5 g% ethanol daily for 3 months, and differentially expressed pancreatic proteins were identified by protein separation using 2-dimensional gel electrophoresis and identification by mass spectrometry...
June 22, 2017: Pancreas
https://www.readbyqxmd.com/read/28650320/combination-of-exendin-4-and-dpp-4-silencing-promoted-angiogenesis-of-human-coronary-artery-endothelial-cells-via-activation-of-pi3k-akt-pathway
#20
Xuewen Qi, Haifeng Liu, Limei Mao, Peng Sun, Degui Kong
This study was aimed to explore the combined effects of Exendin-4 with dipeptidyl peptidase-IV (DPP-4) silencing on vascular endothelial growth factor (VEGF)-induced cell proliferation and angiogenesis in Human Coronary Artery Endothelial Cells (HCAECs), as well as the underlying molecular mechanisms which were involved in this process. HCAECs were treated by exendin-4, small interfering RNA (siRNA) targeting DPP-4 (DPP-4-siRNA) or exendin-4 plus DPP-4-siRNA, respectively. Cell migration, proliferation and angiogenesis in vitro were assessed by scratch-wound assay, MTT, tran swell assay, and matrigel tube formation, respectively...
March 2017: Pakistan Journal of Pharmaceutical Sciences
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