keyword
MENU ▼
Read by QxMD icon Read
search

Cell mechanics

keyword
https://www.readbyqxmd.com/read/29346833/phase-1b-trial-of-ficlatuzumab-a-humanized-hepatocyte-growth-factor-inhibitory-monoclonal-antibody-in-combination-with-gefitinib-in-asian-patients-with-nsclc
#1
Eng-Huat Tan, Wan-Teck Lim, Myung-Ju Ahn, Quan-Sing Ng, Jin Seok Ahn, Daniel Shao-Weng Tan, Jong-Mu Sun, May Han, Francis C Payumo, Krista McKee, Wei Yin, Marc Credi, Shefali Agarwal, Jaroslaw Jac, Keunchil Park
Hepatocyte growth factor (HGF)/c-Met pathway dysregulation is a mechanism for epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors (TKIs). Ficlatuzumab (AV-299; SCH 900105), a humanized IgG1 κ HGF inhibitory monoclonal antibody, prevents HGF/c-Met pathway ligand-mediated activation. This phase 1b study assessed the safety/tolerability, pharmacokinetics/pharmacodynamics, and antitumor activity of ficlatuzumab plus gefitinib in Asian patients with previously treated advanced non-small cell lung cancer (NSCLC)...
January 18, 2018: Clinical Pharmacology in Drug Development
https://www.readbyqxmd.com/read/29346788/vitamin-d-classic-and-novel-actions
#2
Ángel Gil, Julio Plaza-Diaz, María Dolores Mesa
BACKGROUND: Classically, vitamin D has been implicated in bone health by promoting calcium absorption in the gut and maintenance of serum calcium and phosphate concentrations, as well as by its action on bone growth and reorganization through the action of osteoblasts and osteoclasts cells. However, in the last 2 decades, novel actions of vitamin D have been discovered. The present report summarizes both classic and novel actions of vitamin D. SUMMARY: 1,25(OH)2 vitamin D, the active metabolite of vitamin D, also known as calcitriol, regulates not only calcium and phosphate homeostasis but also cell proliferation and differentiation, and has a key a role to play in the responses of the immune and nervous systems...
January 18, 2018: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/29346777/prrt2-regulates-synaptic-fusion-by-directly-modulating-snare-complex-assembly
#3
Jeff Coleman, Ouardane Jouannot, Sathish K Ramakrishnan, Maria N Zanetti, Jing Wang, Vincenzo Salpietro, Henry Houlden, James E Rothman, Shyam S Krishnakumar
Mutations in proline-rich transmembrane protein 2 (PRRT2) are associated with a range of paroxysmal neurological disorders. PRRT2 predominantly localizes to the pre-synaptic terminals and is believed to regulate neurotransmitter release. However, the mechanism of action is unclear. Here, we use reconstituted single vesicle and bulk fusion assays, combined with live cell imaging of single exocytotic events in PC12 cells and biophysical analysis, to delineate the physiological role of PRRT2. We report that PRRT2 selectively blocks the trans SNARE complex assembly and thus negatively regulates synaptic vesicle priming...
January 16, 2018: Cell Reports
https://www.readbyqxmd.com/read/29346774/mannose-receptor-1-restricts-hiv-particle-release-from-infected-macrophages
#4
Sayaka Sukegawa, Eri Miyagi, Fadila Bouamr, Helena Farkašová, Klaus Strebel
Human mannose receptor 1 (hMRC1) is expressed on the surface of most tissue macrophages, dendritic cells, and select lymphatic or liver endothelial cells. HMRC1 contributes to the binding of HIV-1 to monocyte-derived macrophages (MDMs) and is involved in the endocytic uptake of HIV-1 into these cells. Here, we identify hMRC1 as an antiviral factor that inhibits virus release through a bone marrow stromal antigen 2 (BST-2)-like mechanism. Virions produced in the presence of hMRC1 accumulated in clusters at the cell surface but were fully infectious...
January 16, 2018: Cell Reports
https://www.readbyqxmd.com/read/29346771/rapid-turnover-of-cortical-ncam1-regulates-synaptic-reorganization-after-peripheral-nerve-injury
#5
Hyoung-Gon Ko, Jun-Hyeok Choi, Dong Ik Park, SukJae Joshua Kang, Chae-Seok Lim, Su-Eon Sim, Jaehoon Shim, Ji-Il Kim, Siyong Kim, Tae-Hyeok Choi, Sanghyun Ye, Jaehyun Lee, Pojeong Park, Somi Kim, Jeehaeh Do, Jihye Park, Md Ariful Islam, Hyun Jeong Kim, Christoph W Turck, Graham L Collingridge, Min Zhuo, Bong-Kiun Kaang
Peripheral nerve injury can induce pathological conditions that lead to persistent sensitized nociception. Although there is evidence that plastic changes in the cortex contribute to this process, the underlying molecular mechanisms are unclear. Here, we find that activation of the anterior cingulate cortex (ACC) induced by peripheral nerve injury increases the turnover of specific synaptic proteins in a persistent manner. We demonstrate that neural cell adhesion molecule 1 (NCAM1) is one of the molecules involved and show that it mediates spine reorganization and contributes to the behavioral sensitization...
January 16, 2018: Cell Reports
https://www.readbyqxmd.com/read/29346769/switching-on-depression-and-potentiation-in-the-cerebellum
#6
Andrew R Gallimore, Taegon Kim, Keiko Tanaka-Yamamoto, Erik De Schutter
Long-term depression (LTD) and long-term potentiation (LTP) in the cerebellum are important for motor learning. However, the signaling mechanisms controlling whether LTD or LTP is induced in response to synaptic stimulation remain obscure. Using a unified model of LTD and LTP at the cerebellar parallel fiber-Purkinje cell (PF-PC) synapse, we delineate the coordinated pre- and postsynaptic signaling that determines the direction of plasticity. We show that LTP is the default response to PF stimulation above a well-defined frequency threshold...
January 16, 2018: Cell Reports
https://www.readbyqxmd.com/read/29346766/cell-type-specificity-of-callosally-evoked-excitation-and-feedforward-inhibition-in-the-prefrontal-cortex
#7
Paul G Anastasiades, Joseph J Marlin, Adam G Carter
Excitation and inhibition are highly specific in the cortex, with distinct synaptic connections made onto subtypes of projection neurons. The functional consequences of this selective connectivity depend on both synaptic strength and the intrinsic properties of targeted neurons but remain poorly understood. Here, we examine responses to callosal inputs at cortico-cortical (CC) and cortico-thalamic (CT) neurons in layer 5 of mouse prelimbic prefrontal cortex (PFC). We find callosally evoked excitation and feedforward inhibition are much stronger at CT neurons compared to neighboring CC neurons...
January 16, 2018: Cell Reports
https://www.readbyqxmd.com/read/29346765/characterization-of-endothelial-cells-associated-with-hematopoietic-niche-formation-in-humans-identifies-il-33-as-an-anabolic-factor
#8
Keane Jared Guillaume Kenswil, Adrian Christopher Jaramillo, Zhen Ping, Si Chen, Remco Michiel Hoogenboezem, Maria Athina Mylona, Maria Niken Adisty, Eric Moniqué Johannes Bindels, Pieter Koen Bos, Hans Stoop, King Hong Lam, Bram van Eerden, Tom Cupedo, Marc Hermanus Gerardus Petrus Raaijmakers
Bone marrow formation requires an orchestrated interplay between osteogenesis, angiogenesis, and hematopoiesis that is thought to be mediated by endothelial cells. The nature of the endothelial cells and the molecular mechanisms underlying these events remain unclear in humans. Here, we identify a subset of endoglin-expressing endothelial cells enriched in human bone marrow during fetal ontogeny and upon regeneration after chemotherapeutic injury. Comprehensive transcriptional characterization by massive parallel RNA sequencing of these cells reveals a phenotypic and molecular similarity to murine type H endothelium and activation of angiocrine factors implicated in hematopoiesis, osteogenesis, and angiogenesis...
January 16, 2018: Cell Reports
https://www.readbyqxmd.com/read/29346759/nf-%C3%AE%C2%BAb-chromatin-interactions-drive-diverse-phenotypes-by-modulating-transcriptional-noise
#9
Victor C Wong, Victor L Bass, M Elise Bullock, Arvind K Chavali, Robin E C Lee, Walther Mothes, Suzanne Gaudet, Kathryn Miller-Jensen
Noisy gene expression generates diverse phenotypes, but little is known about mechanisms that modulate noise. Combining experiments and modeling, we studied how tumor necrosis factor (TNF) initiates noisy expression of latent HIV via the transcription factor nuclear factor κB (NF-κB) and how the HIV genomic integration site modulates noise to generate divergent (low-versus-high) phenotypes of viral activation. We show that TNF-induced transcriptional noise varies more than mean transcript number and that amplification of this noise explains low-versus-high viral activation...
January 16, 2018: Cell Reports
https://www.readbyqxmd.com/read/29346746/shh-ushing-midline-crossing-through-remote-protein-transport
#10
Eloísa Herrera, Austen A Sitko, Paola Bovolenta
Shh contributes to neural circuit formation with different mechanisms. In this issue, Peng and colleagues (2018) identify a novel trans-axonal mechanism by which Shh derived from contralateral projecting retinal ganglion cells prevents midline crossing of Boc-expressing ipsilateral axons at the optic chiasm.
January 17, 2018: Neuron
https://www.readbyqxmd.com/read/29346719/a-tunable-molten-salt-route-for-scalable-synthesis-of-ultrathin-amorphous-carbon-nanosheets-as-high-performance-anode-materials-for-lithium-ion-batteries
#11
Yixian Wang, Wei Tian, Luhai Wang, Haoran Zhang, Jialiang Liu, Tingyue Peng, Lei Pan, Xiaobo Wang, Mingbo Wu
Amorphous carbon is regarded as a promising alternative to commercial graphite as the lithium-ion battery anode due to its capability to reversibly store more lithium ions. However, the structural disorder with a large number of defects can lead to low electrical conductivity of the amorphous carbon, thus limiting its application for high power output. Herein, ultrathin amorphous carbon nanosheets were prepared from petroleum asphalt through tuning the carbonization temperature in a molten-salt medium. The amorphous nanostructure with expanded carbon interlayer spacing can provide substantial active sites for lithium storage while the two-dimensional (2D) morphology can facilitate fast electrical conductivity...
January 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29346713/spark-generated-microbubble-cell-sorter-for-microfluidic-flow-cytometry
#12
Jingjing Zhao, Zheng You
High-speed and accurate cell sorting is of great significance for cell analysis regarding both bioresearch and clinical application. Different from the jet-in-air sorting of commercial flow cytometers, sorting in fully enclosed and disposal microfluidic chips can avoid aerosols and crosscontamination, thus contributing to the improvement of biosafety and test accuracy. However, current microfluidic sorters usually require complicated structures, or otherwise cannot attain high throughput. In this article, a sorting mechanism for microfluidics is proposed for the first time based on the jet flow induced by the spark-generated cavitation microbubble that can be easily realized by a pair of electrodes...
January 18, 2018: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/29346642/rnase7-but-not-psoriasin-nor-spla2-iia-associates-to-mycobacterium-tuberculosis-during-airway-epithelial-cells-infection
#13
Flor Torres-Juarez, Lousseine Touqui, Juan Leon-Contreras, Cesar Rivas-Santiago, Jose A Enciso-Moreno, Rogelio Hernández-Pando, Bruno Rivas-Santiago
Tuberculosis (TB) is a disease caused by Mycobacterium tuberculosis (Mtb). Innate immunity is the first line of defense against Mtb and malfunctions in any of its components is associated with the susceptibility to the disease. Epithelial products, such as host defence peptides (HDP) are the first molecules produced to counteract the infection. Although a wide variety of HDP are produced by epithelial cells only few of them have been studied during Mtb infection. Here, we assessed the expression and production of the HDPs: psoriasin, sPLA2-IIA and RNase 7 in airway epithelial cells (NCI-H292), type II pneumocytes (A549 cells) and monocytes-derived macrophages from human peripheral blood mononuclear cells (bMDM) and from the human cell line THP1(MDM) after Mtb in vitro infection...
January 16, 2018: Pathogens and Disease
https://www.readbyqxmd.com/read/29346580/smoking-sex-and-non-small-cell-lung-cancer-steroid-hormone-receptors-in-tumor-tissue-s0424
#14
Ting-Yuan David Cheng, Amy K Darke, Mary W Redman, Gary R Zirpoli, Warren Davis, Rochelle Payne Ondracek, Wiam Bshara, Angela R Omilian, Robert Kratzke, Mary E Reid, Julian R Molina, Jill M Kolesar, Yuhchyau Chen, Robert M MacRae, James Moon, Philip Mack, David R Gandara, Karen Kelly, Regina M Santella, Kathy S Albain, Christine B Ambrosone
Background: To what extent steroid hormones contribute to lung cancer in male and female never smokers and smokers is unclear. We examined expression of hormone receptors in lung tumors by sex and smoking. Methods: Patients with primary non-small cell lung cancer were recruited into an Intergroup study in the United States and Canada, led by SWOG (S0424). Tumors from 813 cases (450 women and 363 men) were assayed using immunohistochemistry for estrogen receptor (ER)-α, ER-β, progesterone receptor (PR), and human epidermal growth factor receptor 2 (HER2)...
January 13, 2018: Journal of the National Cancer Institute
https://www.readbyqxmd.com/read/29346578/effect-of-daidzein-and-equol-on-dna-replication-in-mcf-7-cells
#15
Mako Tsuji, Tomoki Tanaka, Ryosuke Nagashima, Yuka Sagisaka, Yuko Tousen, Yoriko Nishide, Yoshiko Ishimi, Yukio Ishimi
It has been reported that daidzein and equol stimulate DNA replication and proliferation of MCF-7 cells. However, their molecular mechanisms of action are still unclear. We examined the effects of daidzein and equol on DNA replication of MCF-7 cells, focusing on MCM2-7 proteins, which function as the replicative helicase. In the presence of either 1 μM of daidzein or equol, the number of cells in S-phase, which was determined by detecting bromodeoxyuridine incorporated into replicated DNA, almost doubled...
January 15, 2018: Journal of Biochemistry
https://www.readbyqxmd.com/read/29346562/scaffold-free-trachea-regeneration-by-tissue-engineering-with-bio-3d-printing
#16
Daisuke Taniguchi, Keitaro Matsumoto, Tomoshi Tsuchiya, Ryusuke Machino, Yosuke Takeoka, Abdelmotagaly Elgalad, Kiyofumi Gunge, Katsunori Takagi, Yasuaki Taura, Go Hatachi, Naoto Matsuo, Naoya Yamasaki, Koichi Nakayama, Takeshi Nagayasu
OBJECTIVES: Currently, most of the artificial airway organs still require scaffolds; however, such scaffolds exhibit several limitations. Alternatively, the use of an autologous artificial trachea without foreign materials and immunosuppressants may solve these issues and constitute a preferred tool. The rationale of this study was to develop a new scaffold-free approach for an artificial trachea using bio-3D printing technology. Here, we assessed the circumferential tracheal replacement using scaffold-free trachea-like grafts generated from isolated cells in an inbred animal model...
January 15, 2018: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29346521/the-intracellular-and-intercellular-cross-talk-during-subsidiary-cell-formation-in-zea-mays-existing-and-novel-components-orchestrating-cell-polarization-and-asymmetric-division
#17
P Apostolakos, P Livanos, E Giannoutsou, E Panteris, B Galatis
Background: Formation of stomatal complexes in Poaceae is the outcome of three asymmetric and one symmetric cell division occurring in particular leaf protodermal cells. In this definite sequence of cell division events, the generation of subsidiary cells is of particular importance and constitutes an attractive model for studying local intercellular stimulation. In brief, an induction stimulus emitted by the guard cell mother cells (GMCs) triggers a series of polarization events in their laterally adjacent protodermal cells...
January 15, 2018: Annals of Botany
https://www.readbyqxmd.com/read/29346508/oroxylin-a%C3%AF-a-natural-compound-mitigates-the-negative-effects-of-tnf%C3%AE-treated-acute-myelogenous-leukemia-cells
#18
Hui Li, Na Lu, Xiaoxuan Yu, Xiao Liu, Po Hu, Yu Zhu, Le Shen, Jingyan Xu, Zhiyu Li, Qinglong Guo, Hui Hui
Tumor necrosis factor alpha (TNFα) is a complicated cytokine which is involved in proliferation and differentiation of acute myelogenous leukemia (AML) cells through a poorly understood mechanism. Mechanistic studies indicate that TNFα induced binding of PI3K subunit p85α to N-terminal truncated nuclear receptor RXRα (tRXRα) proteins, and activated AKT. The activated PI3K/AKT pathway negatively regulated differentiation of AML cells through the up-regulation of c-Myc. In addition, TNFα also induced activation of nuclear factor κB (NF-κB), a nuclear transcription factor which was shown to promote cell proliferation...
January 13, 2018: Carcinogenesis
https://www.readbyqxmd.com/read/29346445/transcriptome-analysis-of-skin-fibroblasts-with-dominant-negative-col3a1-mutations-provides-molecular-insights-into-the-etiopathology-of-vascular-ehlers-danlos-syndrome
#19
Nicola Chiarelli, Giulia Carini, Nicoletta Zoppi, Marco Ritelli, Marina Colombi
Vascular Ehlers-Danlos syndrome (vEDS) is a dominantly inherited connective tissue disorder caused by mutations in the COL3A1 gene that encodes type III collagen (COLLIII), which is the major expressed collagen in blood vessels and hollow organs. The majority of disease-causing variants in COL3A1 are glycine substitutions and in-frame splice mutations in the triple helix domain that through a dominant negative effect are associated with the severe clinical spectrum potentially lethal of vEDS, characterized by fragility of soft connective tissues with arterial and organ ruptures...
2018: PloS One
https://www.readbyqxmd.com/read/29346426/proliferation-and-survival-of-human-amniotic-epithelial-cells-during-their-hepatic-differentiation
#20
Julieta L Maymó, Rodrigo Riedel, Antonio Pérez-Pérez, Marta Magatti, Bernardo Maskin, José Luis Dueñas, Ornella Parolini, Víctor Sánchez-Margalet, Cecilia L Varone
Stem cells derived from placental tissues are an attractive source of cells for regenerative medicine. Amniotic epithelial cells isolated from human amnion (hAECs) have desirable and competitive characteristics that make them stand out between other stem cells. They have the ability to differentiate toward all three germ layers, they are not tumorigenic and they have immunosuppressive properties. Although liver transplantation is the best way to treat acute and chronic hepatic failure patients, there are several obstacles...
2018: PloS One
keyword
keyword
38757
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"