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https://www.readbyqxmd.com/read/28938749/the-testicular-transcriptome-associated-with-spermatogonia-differentiation-initiated-by-gonadotrophin-stimulation-in-the-juvenile-rhesus-monkey-macaca-mulatta
#1
Suresh Ramaswamy, William H Walker, Paula Aliberti, Rahil Sethi, Gary R Marshall, Alyxzandria Smith, Seyedmehdi Nourashrafeddin, Alicia Belgorosky, Uma R Chandran, Mark P Hedger, Tony M Plant
STUDY QUESTION: What is the genetic landscape within the testis of the juvenile rhesus monkey (Macaca mulatta) that underlies the decision of undifferentiated spermatogonia to commit to a pathway of differentiation when puberty is induced prematurely by exogenous LH and FSH stimulation? SUMMARY ANSWER: Forty-eight hours of gonadotrophin stimulation of the juvenile monkey testis resulted in the appearance of differentiating B spermatogonia and the emergence of 1362 up-regulated and 225 down-regulated testicular mRNAs encoding a complex network of proteins ranging from enzymes regulating Leydig cell steroidogenesis to membrane receptors, and from juxtacrine and paracrine factors to transcriptional factors governing spermatogonial stem cell fate...
October 1, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28938700/liver-cancers-with-stem-progenitor-cell-features-a-rare-chemotherapy-sensitive-malignancy
#2
Bruno Christian Köhler, Nina Waldburger, Kai Schlamp, Dirk Jäger, Karl Heinz Weiss, Henning Schulze-Bergkamen, Peter Schirmacher, Christoph Springfeld
Primary liver tumors are a heterogeneous group of malignancies. Besides classical hepatocellular carcinoma (HCC) and cholangiocarcinoma (CC), combined and intermediate forms of liver cancer exist and can express stem-cell markers like nuclear cell adhesion molecule (NCAM-1/CD56), c-kit (CD117) or epithelial cell adhesion molecule (EpCAM) together with high proliferative activity. Liver tumors with progenitor-cell features are associated with an unfavorable prognosis, but the phenotype has not resulted in therapeutic consequences so far...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28938623/mifepristone-inhibits-ovarian-cancer-metastasis-by-intervening-in-sdf-1-cxcr4-chemokine-axis
#3
Ning Zheng, Jiahang Chen, Weiqun Liu, Jian Liu, Tao Li, Hongning Chen, Jichuang Wang, Lee Jia
SDF-1/CXCR4 signaling axis determines the proliferative potential and site-specific cancer metastasis. Recent studies suggest involvement of the axis and steroidal hormone in ovarian cancer metastasis. Here we hypothesize that mifepristone (RU486), a well-known progesterone-based abortifacient, might interfere this axis and inhibit ovarian cancer metastasis. Mifepristone at concentrations < IC50 inhibited expression of CXCR4 on cell surface of ovarian cancer SKOV-3 and IGROV-1, and reduced expression of the intracellular CXCR4 protein and its related mRNA activated by SDF-1...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28938585/the-trophoblast-cell-surface-antigen-2-and-mir-125b-axis-in-urothelial-bladder-cancer
#4
Chiara Avellini, Caterina Licini, Raffaella Lazzarini, Rosaria Gesuita, Emanuela Guerra, Giovanni Tossetta, Clara Castellucci, Stefano Raffaele Giannubilo, Antonio Procopio, Saverio Alberti, Roberta Mazzucchelli, Fabiola Olivieri, Daniela Marzioni
Human trophoblast cell surface antigen 2 (Trop-2) is a 40-kDa transmembrane glycoprotein that was first identified as a marker of human trophoblast cells. Trop-2 acts on cell proliferation, adhesion, and migration by activating a number of intracellular signalling pathways. Elevated Trop-2 expression has been demonstrated in several types of cancer and correlated with aggressiveness and poor prognosis. Since no data are available on Trop-2 in bladder cancer (BC), the purpose of the study was to determine its levels in tissue specimens from normal individuals and patients with BC at different stages...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28938552/novel-pleiotropic-effects-of-bioactive-phospholipids-in-human-lung-cancer-metastasis
#5
Gabriela Schneider, Zachariah Payne Sellers, Kamila Bujko, Sham S Kakar, Magda Kucia, Mariusz Z Ratajczak
We previously proposed that one of the unwanted side effects of chemotherapy and radiotherapy is the increase in several peptide- and non-peptide based chemoattractants in damaged tissues, leading to induction of a prometastatic microenvironment for remaining cancer cells. Herein, we turned out our attention to a potential role of bioactive phospholipids (BphsLs), such as sphingosine-1-phosphate (S1P), ceramide-1-phosphate (C1P), lysophosphatidylcholine (LPC), and lysophosphatidic acid (LPA) in lung cancer (LC) metastasis...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28938477/growth-hormone-and-the-epithelial-to-mesenchymal-transition
#6
Alison L Brittain, Reetobrata Basu, Yanrong Qian, John J Kopchick
Context: Previous studies have implicated growth hormone (GH) in the progression of several cancers, including breast, colorectal and pancreatic. A mechanism by which GH may play this role in cancer is through the induction of the epithelial-to-mesenchymal transition (EMT). During the EMT process, epithelial cells lose their defining phenotypes causing loss of cellular adhesion and increased cell migration. This review aims to carefully summarize the previous two decades of research that points to GH as an initiator of EMT, in both cancerous and non-cancerous tissues...
August 4, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28938427/calreticulin-is-involved-in-invasion-of-human-extravillous-trophoblasts-through-functional-regulation-of-integrin-%C3%AE-1
#7
Madoka Yamamoto, Midori Ikezaki, Saori Toujima, Naoyuki Iwahashi, Mika Mizoguchi, Sakiko Nanjo, Sawako Minami, Yoshito Ihara, Kazuhiko Ino
Calreticulin (CRT), a molecular chaperone in the endoplasmic reticulum (ER), plays a variety of roles in cell growth, differentiation, apoptosis, immunity, and cancer biology. It has been reported that CRT is expressed in the human placenta, although its function in placental development is poorly understood. Appropriate invasion of extravillous trophoblasts (EVTs) into the maternal decidua is necessary for successful pregnancy. The objective of the present study was to investigate the expression and functional role of CRT in EVTs by utilizing the human EVT cell line HTR8/SVneo, in which CRT gene expression was knocked down...
August 29, 2017: Endocrinology
https://www.readbyqxmd.com/read/28938165/a-novel-dopa-albumin-based-tissue-adhesive-for-internal-medical-applications
#8
Wenzhen Zhu, Yvonne Peck, Jabed Iqbal, Dong-An Wang
To date, existing tissue adhesives have various weak points in gluing kinetics and stability - particularly, in biocompatibility, which make most of them remain suboptimal for internal conditions. Herein, a novel mussel-inspired "BCD" tissue glue made of bovine serum albumin (BSA), citrate acid (CA) and dopamine was developed aiming at internal medical applications. BSA was employed as a natural and biocompatible macromolecular backbone; CA was introduced as a dual-functional intermediate to increase reactive carboxyl sites for engraftment of dopamine onto BSA backbone and also block the competing reactive amines from the proteinic backbone...
September 14, 2017: Biomaterials
https://www.readbyqxmd.com/read/28938034/influence-of-partial-o%C3%A2-pressure-on-the-adhesion-proliferation-and-osteogenic-differentiation-of-human-dental-pulp-stem-cells-on-%C3%AE-tricalcium-phosphate-scaffold
#9
Jose Viña-Almunia, Cristina Mas-Bargues, Consuelo Borras, Juan Gambini, Marya El Alami, Jorge Sanz-Ros, Miguel Peñarrocha, Jose Vina
PURPOSE: To analyze, in vitro, the influence of O₂ pressure on the adhesion, proliferation, and osteogenic differentiation of human dental pulp stem cells (DPSC) on β-tricalcium phosphate (β-TCP) scaffold. MATERIALS AND METHODS: DPSC, positive for the molecular markers CD133, Oct4, Nestin, Stro-1, and CD34, and negative for CD45, were isolated from extracted third molars. Experiments were started by seeding 200,000 cells on β-TCP cultured under 3% or 21% O₂ pressure...
September 22, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28937893/effect-of-enamel-deproteinization-in-primary-teeth
#10
Ananthi Christopher, R Krishnakumar, N Venugopal Reddy, G Rohini
OBJECTIVE: To evaluate and compare the topographical features of enamel surface, etched with different materials. STUDY DESIGN: 10 extracted human primary molars were randomly selected and cut and trimmed to 1 mm(2). Each group comprised of 10 blocks and the enamel was treated as follows: Group I-35% H3PO4; Group II-5.25% NaOCl + 35% H3PO4 ;Group III-5.25% NaOCl; Group IV no treatment was carried out. All the samples were prepared for Scanning electron microscope analysis...
September 22, 2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28937866/soluble-vascular-adhesion-protein-1-mediates-spermine-oxidation-as-semicarbazide-sensitive-amine-oxidase-possible-role-in-proliferative-diabetic-retinopathy
#11
Miyuki Murata, Kousuke Noda, Akiko Kawasaki, Shiho Yoshida, Yoko Dong, Michiyuki Saito, Zhenyu Dong, Ryo Ando, Shohei Mori, Wataru Saito, Atsuhiro Kanda, Susumu Ishida
Purpose/Aim of the study: To explore the possible role of vascular adhesion protein-1 (VAP-1) via its enzymatic function as a semicarbazide-sensitive amine oxidase (SSAO) in the pathogenesis of proliferative diabetic retinopathy (PDR). MATERIALS AND METHODS: The levels of soluble VAP-1/SSAO and the unsaturated aldehyde acrolein (ACR)-conjugated protein, N(ε)-(3-formyl-3, 4-dehydropiperidino) lysine adduct (FDP-Lys), were measured in vitreous fluid samples of PDR and non-diabetic patients using ELISA...
September 22, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28937738/mussel-inspired-coating-and-adhesion-for-rechargeable-batteries-a-review
#12
You Kyeong Jeong, Sung Hyeon Park, Jang Wook Choi
A significant effort is currently being invested to improve the electrochemical performance of classical lithium-ion batteries (LIBs) or to accelerate the advent of new chemistry-based post-LIBs. Regardless of governing chemistry associated with charge storage, stable electrode-electrolyte interface and wet-adhesion among the electrode particles are universally desired for rechargeable batteries adopting liquid electrolytes. In this regard, recent studies have witnessed the usefulness of mussel-inspired polydopamine or catechol functional group in modifying the key battery components, such as active material, separator, and binder...
September 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28937702/revisiting-the-generalized-scaling-law-for-adhesion-role-of-compliance-and-extension-to-progressive-failure
#13
Ahmad R Mojdehi, Douglas P Holmes, David A Dillard
A generalized scaling law, based on the classical fracture mechanics approach, is developed to predict the bond strength of adhesive systems. The proposed scaling relationship depends on the rate of change of debond area with compliance, rather than the ratio of area to compliance. This distinction can have a profound impact on the expected bond strength of systems, particularly when the failure mechanism changes or the compliance of the load train increases. Based on the classical fracture mechanics approach for rate-independent materials, the load train compliance should not affect the force capacity of the adhesive system, whereas when the area to compliance ratio is used as the scaling parameter, it directly influences the bond strength, making it necessary to distinguish compliance contributions...
September 22, 2017: Soft Matter
https://www.readbyqxmd.com/read/28937653/differential-functional-roles-of-aldh1a1-and-aldh1a3-in-mediating-metastatic-behavior-and-therapy-resistance-of-human-breast-cancer-cells
#14
Alysha K Croker, Mauricio Rodriguez-Torres, Ying Xia, Siddika Pardhan, Hon Sing Leong, John D Lewis, Alison L Allan
Previous studies indicate that breast cancer cells with high aldehyde dehydrogenase (ALDH) activity and CD44 expression (ALDH(hi)CD44⁺) contribute to metastasis and therapy resistance, and that ALDH1 correlates with poor outcome in breast cancer patients. The current study hypothesized that ALDH1 functionally contributes to breast cancer metastatic behavior and therapy resistance. Expression of ALDH1A1 or ALDH1A3 was knocked down in MDA-MB-468 and SUM159 human breast cancer cells using siRNA. Resulting impacts on ALDH activity (Aldefluor(®) assay); metastatic behavior and therapy response in vitro (proliferation/adhesion/migration/colony formation/chemotherapy and radiation) and extravasation/metastasis in vivo (chick choroiallantoic membrane assay) was assessed...
September 22, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28937442/orally-active-epoxyeicosatrienoic-acid-analogs
#15
William B Campbell, John D Imig, James M Schmitz, John R Falck
Biologically active epoxyeicosatrienoic acid (EET) regioisomers are synthesized from arachidonic acid by cytochrome P450 epoxygenases of endothelial, myocardial, and renal tubular cells. EETs relax vascular smooth muscle and decrease inflammatory cell adhesion and cytokine release. Renal EETs promote sodium excretion and vasodilation to decrease hypertension. Cardiac EETs reduce infarct size after ischemia-reperfusion injury and decrease fibrosis and inflammation in heart failure. In diabetes, EETs improve insulin sensitivity, increase glucose tolerance, and reduce the renal injury...
September 19, 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/28937213/the-structural-basis-of-polydopamine-film-formation-probing-5-6-dihydroxyindole-based-eumelanin-type-units-and-the-porphyrin-issue
#16
Maria Laura Alfieri, Raffaella Micillo, Lucia Panzella, Orlando Crescenzi, Stefano Luigi Luigi Oscurato, Pasqualino Maddalena, Alessandra Napolitano, Vincent Ball, Marco d'Ischia
The role of 5,6-dihydroxyindole (DHI)-based oligomers, including porphyrin-like tetramers, in polydopamine (PDA) film formation was addressed by a comparative structural investigation against model polymers from DHI and its 2,7'-dimer. MALDI-MS data showed that: a) PDA is structurally different from DHI melanin and does not contain species compatible with DHI-based oligomers as primary building blocks; b) PDA films and precipitate display a single main peak at m/z 402 in common; c) no species matching the range of m/z values expected for cyclic porphyrin-type tetramers was detected in DHI melanin produced in the presence or in the absence of folic acid (FA) as templating agent, nor by oxidation of the 2,7'-dimer of DHI as putative precursor...
September 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28937205/electrospun-p-type-nickel-oxide-semiconducting-nanowires-for-low-voltage-field-effect-transistors
#17
Ao Liu, You Meng, Huihui Zhu, Yong-Young Noh, Guoxia Liu, Fukai Shan
One-dimensional metal-oxide nanowires are regarded as important building blocks in nanoscale electronics due to their unique mechanical and electrical properties. In this work, p-type nickel oxide nanowires (NiO NWs) were fabricated by combining sol-gel and electrospinning processes. The polyvinylpyrrolidone (PVP) with 1,300,000 molecular weight was used as the polymer matrix to increase the viscosity of NiO precursor solution. The formation and properties of the as-spun NiO/PVP composite NWs before/after calcination treatment were investigated using various techniques...
September 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28936962/-evaluation-of-the-effect-of-a-new-fixation-tape-for-tracheal-catheter-in-intensive-care-patients
#18
Limin Chen, Ruihong Liu, Biyu Shen, Lingling Wang, Zhiming Cui, Guanhua Xu
OBJECTIVE: To evaluate the effect of a new type of fixation tape for tracheal catheter in intensive care patients. METHODS: A purposive sampling study was conducted. Ninety patients experienced oral tracheal intubation for mechanical ventilation, and admitted to respiratory intensive care unit (ICU) of the Second Affiliated Hospital of Nantong University from November 2015 to February 2017 were enrolled. All the patients were randomly (random number) divided into the control group and the observation group with 45 patients in each group...
September 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28936487/platelet-dense-granules-begin-to-selectively-accumulate-mepacrine-during-proplatelet-formation
#19
Hayley A Hanby, Jialing Bao, Ji-Yoon Noh, Danuta Jarocha, Mortimer Poncz, Mitchell J Weiss, Michael S Marks
Platelet dense granules (DGs) are storage organelles for calcium ions, small organic molecules such as ADP and serotonin, and larger polyphosphates that are secreted upon platelet stimulation to enhance platelet activation, adhesion, and stabilization at sites of vascular damage. DGs are thought to fully mature within megakaryocytes (MKs) prior to platelet formation. Here we challenge this notion by exploiting vital fluorescent dyes to distinguish mildly acidic DGs from highly acidic compartments by microscopy in platelets and MKs...
August 22, 2017: Blood Advances
https://www.readbyqxmd.com/read/28936481/controlling-epithelial-to-mesenchymal-transition-through-acetylation-of-histone-h2bk5
#20
Robert J Mobley, Amy N Abell
Large-scale epigenetic changes take place when epithelial cells with cell-cell adhesion and apical-basal polarity transition into invasive, individual, mesenchymal cells through a process known as epithelial to mesenchymal transition (EMT). Importantly, cancers with stem cell properties disseminate and form distant metastases by reactivating the developmental EMT program. Recent studies have demonstrated that the epigenetic histone modification, H2BK5 acetylation (H2BK5Ac), is important in the regulation of EMT...
September 2017: Journal of Nature and Science
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