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https://www.readbyqxmd.com/read/28107744/sensitive-detection-of-t4-polynucleotide-kinase-activity-based-on-multifunctional-magnetic-probes-and-polymerization-nicking-reactions-mediated-hyperbranched-rolling-circle-amplification
#1
Xia Li, Xiaowen Xu, Juan Song, Qingwang Xue, Chenzhong Li, Wei Jiang
T4 polynucleotide kinase (PNK) plays critical roles in regulating DNA phosphorylation modes during the repair of DNA lesions. The aberrant activity of T4 PNK has been proven to be associated with a variety of human pathologies. Sensitive detection of T4 PNK activity is critical to both clinical diagnosis and therapeutics. Herein, a background-eliminated fluorescence assay for sensitive detection of T4 PNK activity has been developed by multifunctional magnetic probes and polymerization nicking reactions mediated hyperbranched rolling circle amplification (HRCA)...
January 12, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28107504/sox10-nano-lantern-reporter-human-ips-cells-a-versatile-tool-for-neural-crest-research
#2
Tomoko Horikiri, Hiromi Ohi, Mitsuaki Shibata, Makoto Ikeya, Morio Ueno, Chie Sotozono, Shigeru Kinoshita, Takahiko Sato
The neural crest is a source to produce multipotent neural crest stem cells that have a potential to differentiate into diverse cell types. The transcription factor SOX10 is expressed through early neural crest progenitors and stem cells in vertebrates. Here we report the generation of SOX10-Nano-lantern (NL) reporter human induced pluripotent stem cells (hiPS) by using CRISPR/Cas9 systems, that are beneficial to investigate the generation and maintenance of neural crest progenitor cells. SOX10-NL positive cells are produced transiently from hiPS cells by treatment with TGFβ inhibitor SB431542 and GSK3 inhibitor CHIR99021...
2017: PloS One
https://www.readbyqxmd.com/read/28107433/investigation-of-cross-contamination-and-misidentification-of-278-widely-used-tumor-cell-lines
#3
Yaqing Huang, Yuehong Liu, Congyi Zheng, Chao Shen
In recent years, biological research involving human cell lines has been rapidly developing in China. However, some of the cell lines are not authenticated before use. Therefore, misidentified and/or cross-contaminated cell lines are unfortunately commonplace. In this study, we present a comprehensive investigation of cross-contamination and misidentification for a panel of 278 cell lines from 28 institutes in China by using short tandem repeat profiling method. By comparing the DNA profiles with the cell bank databases of ATCC and DSMZ, a total of 46...
2017: PloS One
https://www.readbyqxmd.com/read/28107368/multi-channel-optical-coherence-elastography-using-relative-and-absolute-shear-wave-time-of-flight
#4
Eli Elyas, Alex Grimwood, Janine T Erler, Simon P Robinson, Thomas R Cox, Daniel Woods, Peter Clowes, Ramona De Luca, Franco Marinozzi, Jérémie Fromageau, Jeffrey C Bamber
Elastography, the imaging of elastic properties of soft tissues, is well developed for macroscopic clinical imaging of soft tissues and can provide useful information about various pathological processes which is complementary to that provided by the original modality. Scaling down of this technique should ply the field of cellular biology with valuable information with regard to elastic properties of cells and their environment. This paper evaluates the potential to develop such a tool by modifying a commercial optical coherence tomography (OCT) device to measure the speed of shear waves propagating in a three-dimensional (3D) medium...
2017: PloS One
https://www.readbyqxmd.com/read/28107238/roles-of-the-endoplasmic-reticulum-stress-transducer-oasis-in-ossification-of-the-posterior-longitudinal-ligament
#5
Yu Chen, Haisong Yang, Jinhao Miao, Xiaowei Liu, Xinwei Wang, Deyu Chen
STUDY DESIGN: In vitro molecular research on the posterior longitudinal ligament fibroblasts. OBJECTIVE: To investigate different expression of old astrocyte specifically induced substance (OASIS) between spinal ligament fibroblasts from the patients with ossification of the posterior longitudinal ligament (OPLL) and from non-OPLL patients and demonstrate knockdown of OASIS protein expression by RNA interference inhibiting expression of type I collagen (COL I) in OPLL cells...
February 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28107094/dynamic-volume-assessment-of-hepatocellular-carcinoma-in-rat-livers-using-a-clinical-3t-mri-and-novel-segmentation
#6
Lorenzo A Orci, Graziano Oldani, Stephanie Lacotte, Florence Slits, Iris Friedli, Wolfgang Wirth, Christian Toso, Jean-Paul Vallée, Lindsey A Crowe
PURPOSE: In vivo liver cancer research commonly uses rodent models. One of the limitations of such models is the lack of accurate and reproducible endpoints for a dynamic assessment of growing tumor nodules. The aim of this study was to validate a noninvasive, true volume segmentation method using two rat hepatocellular carcinoma (HCC) models, correlating magnetic resonance imaging (MRI) with histological volume measurement, and with blood levels of α-fetoprotein. MATERIALS AND METHODS: We used 3T clinical MRI to quantify tumor volume with follow-up over time...
January 20, 2017: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/28106947/3d-bioprinting-and-its-in-vivo-applications
#7
REVIEW
Nhayoung Hong, Gi-Hoon Yang, JaeHwan Lee, GeunHyung Kim
The purpose of 3D bioprinting technology is to design and create functional 3D tissues or organs in situ for in vivo applications. 3D cell-printing, or additive biomanufacturing, allows the selection of biomaterials and cells (bioink), and the fabrication of cell-laden structures in high resolution. 3D cell-printed structures have also been used for applications such as research models, drug delivery and discovery, and toxicology. Recently, numerous attempts have been made to fabricate tissues and organs by using various 3D printing techniques...
January 20, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28106842/adenoviral-vectors-armed-with-cell-fusion-inducing-proteins-as-anti-cancer-agents
#8
REVIEW
Joshua Del Papa, Robin J Parks
Cancer is a devastating disease that affects millions of patients every year, and causes an enormous economic burden on the health care system and emotional burden on affected families. The first line of defense against solid tumors is usually extraction of the tumor, when possible, by surgical methods. In cases where solid tumors can not be safely removed, chemotherapy is often the first line of treatment. As metastatic cancers often become vigorously resistant to treatments, the development of novel, more potent and selective anti-cancer strategies is of great importance...
January 19, 2017: Viruses
https://www.readbyqxmd.com/read/28106829/advances-in-monitoring-cell-based-therapies-with-magnetic-resonance-imaging-future-perspectives
#9
REVIEW
Ethel J Ngen, Dmitri Artemov
Cell-based therapies are currently being developed for applications in both regenerative medicine and in oncology. Preclinical, translational, and clinical research on cell-based therapies will benefit tremendously from novel imaging approaches that enable the effective monitoring of the delivery, survival, migration, biodistribution, and integration of transplanted cells. Magnetic resonance imaging (MRI) offers several advantages over other imaging modalities for elucidating the fate of transplanted cells both preclinically and clinically...
January 19, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28106769/tgf-%C3%AE-signaling-in-gastrointestinal-cancers-progress-in-basic-and-clinical-research
#10
REVIEW
Takehiko Yokobori, Masahiko Nishiyama
Transforming growth factor (TGF)-β superfamily proteins have many important biological functions, including regulation of tissue differentiation, cell proliferation, and migration in both normal and cancer cells. Many studies have reported that TGF-β signaling is associated with disease progression and therapeutic resistance in several cancers. Similarly, TGF-β-induced protein (TGFBI)-a downstream component of the TGF-β signaling pathway-has been shown to promote and/or inhibit cancer. Here, we review the state of basic and clinical research on the roles of TGF-β and TGFBI in gastrointestinal cancers...
January 18, 2017: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/28106728/inflammatory-manifestations-of-lymphedema
#11
REVIEW
Catherine L Ly, Raghu P Kataru, Babak J Mehrara
Lymphedema results from lymphatic insufficiency leading to a progressive inflammatory process that ultimately manifests as discomfort, recurrent infections, and, at times, secondary malignancy. Collectively, these morbidities contribute to an overall poor quality of life. Although there have been recent advances in microsurgical interventions, a conservative palliative approach remains the mainstay of treatment for this disabling disease. The absence of a cure is due to an incomplete understanding of the pathophysiological changes that result in lymphedema...
January 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28106723/inhibition-of-autophagic-degradation-process-contributes-to-claudin-2-expression-increase-and-epithelial-tight-junction-dysfunction-in-tnf-%C3%AE-treated-cell-monolayers
#12
Cong Zhang, Junkai Yan, Yongtao Xiao, Yujie Shen, Jiazheng Wang, Wensong Ge, Yingwei Chen
Tight junction dysfunction plays a vital role in some chronic inflammatory diseases. Pro-inflammatory cytokines, especially tumor necrosis factor alpha (TNF-α), act as important factors in intestinal epithelial tight junction dysfunction during inflammatory conditions. Autophagy has also been shown to be crucial in tight junction function and claudin-2 expression, but whether autophagy has an effect on the change of claudin-2 expression and tight junction function induced by TNF-α is still unknown. To answer this question, we examined the expression of claudin-2 protein, transepithelial electrical resistance (TER), and permeability of cell monolayers, autophagy flux change, and lysosomal pH after TNF-α with or without PP242 treatment...
January 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28106543/expression-and-significance-of-calreticulin-in-human-osteosarcoma
#13
Xu-Hua Zhang, Yue Zhang, Wen-Peng Xie, De-Sheng Sun, Yong-Kui Zhang, Yan-Ke Hao, Guo-Qing Tan
BACKGROUND: As one of the endoplasmic reticulum proteins, Calreticulin (CRT) plays a significant role in the body, and it has been used by many researchers as a target for anti-tumor therapy. OBJECTIVE: The main purpose of the present study was to study expression of CRT of osteosarcoma cells, and analyze the distinctions between normal and tumor tissues, pre- and post-chemotherapy patients, and metastatic and non-metastatic tumors in respect to this expression...
January 13, 2017: Cancer Biomarkers: Section A of Disease Markers
https://www.readbyqxmd.com/read/28106539/plasma-mir-92a-2-as-a-biomarker-for-small-cell-lung-cancer
#14
Yalan Yu, Jiangcheng Zuo, Qian Tan, Khaing Zar Thin, Ping Li, Man Zhu, Mingxia Yu, Zhenming Fu, Chunzi Liang, Jiancheng Tu
MicroRNAs (miRNAs) are small, non-coding RNAs that play important roles in the carcinogenesis and progression of cancers. Aberrant expression of miRNAs in tissue and plasma has been found in various solid tumors. Our research aims to determine whether the abnormal plasma miRNA expression patterns can be used as a predictive marker for the diagnosis and prognosis of small cell lung cancer (SCLC). Fifty SCLC patients and 30 healthy controls annotated with clinical characteristics and specific questionnaire survey for smoking history were available...
January 13, 2017: Cancer Biomarkers: Section A of Disease Markers
https://www.readbyqxmd.com/read/28106389/orthogonal-luciferase-luciferin-pairs-for-bioluminescence-imaging
#15
Krysten A Jones, William B Porterfield, Colin M Rathbun, David C McCutcheon, Miranda A Paley, Jennifer A Prescher
Bioluminescence imaging with luciferase-luciferin pairs is widely used in biomedical research. Several luciferases have been identified in nature, and many have been adapted for tracking cells in whole animals. Unfortunately, the optimal luciferases for imaging in vivo utilize the same substrate, and therefore cannot easily differentiate multiple cell types in a single subject. To develop a broader set of distinguishable probes, we crafted custom luciferins that can be selectively processed by engineered luciferases...
January 20, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28106378/cell-selective-apoptosis-induced-by-polymorphic-alteration-of-self-assembled-silica-nano-webs
#16
Meysam Keshavarz, Bo Tan, Krishnan Venkatakrishnan
The biocompatibility of silicon-based nanomaterial makes it suitable for biophysical and biomedical applications. However, the application of silicon-based nanomaterials has been mainly restricted to nanoparticles (NPs) as a potential drug carrier and the extracellular matrix (ECM) as a platform for cell adhesion and proliferation. Here, we introduced silica NPs self-assembled into a 3D nano-web architecture that was shown to inherit the therapeutic and proliferative attributes of both NPs and ECMs. The self-assembled silica nano-web (SNW) has, therefore, not only shown targeted drug-like behavior in HeLa cells without the use of bio-markers but also has shown ECM characteristics...
January 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28106163/synergistically-enhanced-selective-intracellular-uptake-of-anticancer-drug-carrier-comprising-folic-acid-conjugated-hydrogels-containing-magnetite-nanoparticles
#17
Haneul Kim, Ara Jo, Seulgi Baek, Daeun Lim, Soon-Yong Park, Soo Kyung Cho, Jin Woong Chung, Jinhwan Yoon
Targeted drug delivery has long been extensively researched since drug delivery and release at the diseased site with minimum dosage realizes the effective therapy without adverse side effects. In this work, to achieve enhanced intracellular uptake of anticancer drug carriers for efficient chemo-therapy, we have designed targeted multifunctional anticancer drug carrier hydrogels. Temperature-responsive poly(N-isopropylacrylamide) (PNIPAm) hydrogel core containing superparamagnetic magnetite nanoparticles (MNP) were prepared using precipitation polymerization, and further polymerized with amine-functionalized copolymer shell to facilitate the conjugation of targeting ligand...
January 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28106077/mesenchymal-stem-cell-transplantation-in-tight-skin-mice-identifies-mir-151-5p-as-a-therapeutic-target-for-systemic-sclerosis
#18
Chider Chen, Dandan Wang, Alireza Moshaverinia, Dawei Liu, Xiaoxing Kou, Wenjing Yu, Ruili Yang, Lingyun Sun, Songtao Shi
Systemic sclerosis (SSc), an autoimmune disease, may cause significant osteopenia due to activation of the IL4Rα/mTOR pathway. Mesenchymal stem cell transplantation (MSCT) can ameliorate immune disorders in SSc via inducing immune tolerance. However, it is unknown whether MSCT rescues osteopenia phenotype in SSc. Here we show that MSCT can effectively ameliorate osteopenia in SSc mice by rescuing impaired lineage differentiation of the recipient bone marrow MSCs. Mechanistically, we show that donor MSCs transfer miR-151-5p to the recipient bone marrow MSCs in SSc mice to inhibit IL4Rα expression, thus downregulating mTOR pathway activation to enhance osteogenic differentiation and reduce adipogenic differentiation...
January 20, 2017: Cell Research
https://www.readbyqxmd.com/read/28106075/phosphatidylinositol-3-4-bisphosphate-regulates-neurite-initiation-and-dendrite-morphogenesis-via-actin-aggregation
#19
Shu-Xin Zhang, Li-Hui Duan, Shun-Ji He, Gui-Feng Zhuang, Xiang Yu
Neurite initiation is critical for neuronal morphogenesis and early neural circuit development. Recent studies showed that local actin aggregation underneath the cell membrane determined the site of neurite initiation. An immediately arising question is what signaling mechanism initiated actin aggregation. Here we demonstrate that local clustering of phosphatidylinositol 3,4-bisphosphate (PI(3,4)P2), a phospholipid with relatively few known signaling functions, is necessary and sufficient for aggregating actin and promoting neuritogenesis...
January 20, 2017: Cell Research
https://www.readbyqxmd.com/read/28106073/high-resolution-cryo-em-structure-of-the-proteasome-in-complex-with-adp-alfx
#20
Zhanyu Ding, Zhenglin Fu, Cong Xu, Yifan Wang, Yanxing Wang, Junrui Li, Liangliang Kong, Jinhuan Chen, Na Li, Rongguang Zhang, Yao Cong
The 26S proteasome is an ATP-dependent dynamic 2.5 MDa protease that regulates numerous essential cellular functions through degradation of ubiquitinated substrates. Here we present a near-atomic-resolution cryo-EM map of the S. cerevisiae 26S proteasome in complex with ADP-AlFx. Our biochemical and structural data reveal that the proteasome-ADP-AlFx is in an activated state, displaying a distinct conformational configuration especially in the AAA-ATPase motor region. Noteworthy, this map demonstrates an asymmetric nucleotide binding pattern with four consecutive AAA-ATPase subunits bound with nucleotide...
January 20, 2017: Cell Research
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