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https://www.readbyqxmd.com/read/28445616/extract-of-syzygium-aromaticum-suppress-eef1a-protein-expression-and-fungal-growth
#1
Yihe Wang, Yiran Ding, Shunhe Wang, Haiqin Chen, Zhang Hao, Wei Chen, Zhennan Gu, Yong Q Chen
AIMS: Clove extract has therapeutic potential as an antifungal drug, yet the mechanism of action remain ambiguous. Current study aimed to address the molecular process of the antifungal activity exerted by clove extract. METHODS AND RESULTS: The antifungal assays results showed that clove extract had some effects on all of the tested yeast. Propidium iodide staining assay showed cell membrane damage in Saccharomyces cerevisiae after treatment of clove extract for 30 h...
April 26, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28440291/identifying-n-6-methyladenosine-sites-using-multi-interval-nucleotide-pair-position-specificity-and-support-vector-machine
#2
Pengwei Xing, Ran Su, Fei Guo, Leyi Wei
N6-methyladenosine (m(6)A) refers to methylation of the adenosine nucleotide acid at the nitrogen-6 position. It plays an important role in a series of biological processes, such as splicing events, mRNA exporting, nascent mRNA synthesis, nuclear translocation and translation process. Numerous experiments have been done to successfully characterize m(6)A sites within sequences since high-resolution mapping of m(6)A sites was established. However, as the explosive growth of genomic sequences, using experimental methods to identify m(6)A sites are time-consuming and expensive...
April 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28388414/transcription-impacts-the-efficiency-of-mrna-translation-via-co-transcriptional-n6-adenosine-methylation
#3
Boris Slobodin, Ruiqi Han, Vittorio Calderone, Joachim A F Oude Vrielink, Fabricio Loayza-Puch, Ran Elkon, Reuven Agami
Transcription and translation are two main pillars of gene expression. Due to the different timings, spots of action, and mechanisms of regulation, these processes are mainly regarded as distinct and generally uncoupled, despite serving a common purpose. Here, we sought for a possible connection between transcription and translation. Employing an unbiased screen of multiple human promoters, we identified a positive effect of TATA box on translation and a general coupling between mRNA expression and translational efficiency...
April 6, 2017: Cell
https://www.readbyqxmd.com/read/28384479/mutant-huntingtin-disrupts-the-nuclear-pore-complex
#4
Jonathan C Grima, J Gavin Daigle, Nicolas Arbez, Kathleen C Cunningham, Ke Zhang, Joseph Ochaba, Charlene Geater, Eva Morozko, Jennifer Stocksdale, Jenna C Glatzer, Jacqueline T Pham, Ishrat Ahmed, Qi Peng, Harsh Wadhwa, Olga Pletnikova, Juan C Troncoso, Wenzhen Duan, Solomon H Snyder, Laura P W Ranum, Leslie M Thompson, Thomas E Lloyd, Christopher A Ross, Jeffrey D Rothstein
Huntington's disease (HD) is caused by an expanded CAG repeat in the Huntingtin (HTT) gene. The mechanism(s) by which mutant HTT (mHTT) causes disease is unclear. Nucleocytoplasmic transport, the trafficking of macromolecules between the nucleus and cytoplasm, is tightly regulated by nuclear pore complexes (NPCs) made up of nucleoporins (NUPs). Previous studies offered clues that mHTT may disrupt nucleocytoplasmic transport and a mutation of an NUP can cause HD-like pathology. Therefore, we evaluated the NPC and nucleocytoplasmic transport in multiple models of HD, including mouse and fly models, neurons transfected with mHTT, HD iPSC-derived neurons, and human HD brain regions...
April 5, 2017: Neuron
https://www.readbyqxmd.com/read/28384473/sca31-flies-perform-in-a-balancing-act-between-ran-translation-and-rna-binding-proteins
#5
George R Jackson
In this issue of Neuron, Ishiguro et al. (2017) explore the toxicity of RAN translation in spinocerebellar ataxia 31. Using a Drosophila model, the authors demonstrate that TDP-43 and other RNA-binding proteins act as chaperones to regulate the formation of toxic RNA aggregates.
April 5, 2017: Neuron
https://www.readbyqxmd.com/read/28365506/new-developments-in-ran-translation-insights-from-multiple-diseases
#6
REVIEW
John Douglas Cleary, Laura Pw Ranum
Since the discovery of repeat-associated non-ATG (RAN) translation, and more recently its association with amyotrophic lateral sclerosis/frontotemporal dementia, there has been an intense focus to understand how this process works and the downstream effects of these novel proteins. RAN translation across several different types of repeat expansions mutations (CAG, CTG, CCG, GGGGCC, GGCCCC) results in the production of proteins in all three reading frames without an ATG initiation codon. The combination of bidirectional transcription and RAN translation has been shown to result in the accumulation of up to six mutant expansion proteins in a growing number of diseases...
March 30, 2017: Current Opinion in Genetics & Development
https://www.readbyqxmd.com/read/28351931/antibodies-inhibit-transmission-and-aggregation-of-c9orf72-poly-ga-dipeptide-repeat-proteins
#7
Qihui Zhou, Carina Lehmer, Meike Michaelsen, Kohji Mori, Dominik Alterauge, Dirk Baumjohann, Martin H Schludi, Johanna Greiling, Daniel Farny, Andrew Flatley, Regina Feederle, Stephanie May, Franziska Schreiber, Thomas Arzberger, Christoph Kuhm, Thomas Klopstock, Andreas Hermann, Christian Haass, Dieter Edbauer
Cell-to-cell transmission of protein aggregates is an emerging theme in neurodegenerative disease. Here, we analyze the dipeptide repeat (DPR) proteins that form neuronal inclusions in patients with hexanucleotide repeat expansion C9orf72, the most common known cause of amyotrophic lateral sclerosis (ALS) and frontotemporal lobar degeneration (FTLD). Sense and antisense transcripts of the (G4C2)n repeat are translated by repeat-associated non-ATG (RAN) translation in all reading frames into five aggregating DPR proteins...
March 28, 2017: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/28343865/regulatory-role-of-rna-chaperone-tdp-43-for-rna-misfolding-and-repeat-associated-translation-in-sca31
#8
Taro Ishiguro, Nozomu Sato, Morio Ueyama, Nobuhiro Fujikake, Chantal Sellier, Akemi Kanegami, Eiichi Tokuda, Bita Zamiri, Terence Gall-Duncan, Mila Mirceta, Yoshiaki Furukawa, Takanori Yokota, Keiji Wada, J Paul Taylor, Christopher E Pearson, Nicolas Charlet-Berguerand, Hidehiro Mizusawa, Yoshitaka Nagai, Kinya Ishikawa
Microsatellite expansion disorders are pathologically characterized by RNA foci formation and repeat-associated non-AUG (RAN) translation. However, their underlying pathomechanisms and regulation of RAN translation remain unknown. We report that expression of expanded UGGAA (UGGAAexp) repeats, responsible for spinocerebellar ataxia type 31 (SCA31) in Drosophila, causes neurodegeneration accompanied by accumulation of UGGAAexp RNA foci and translation of repeat-associated pentapeptide repeat (PPR) proteins, consistent with observations in SCA31 patient brains...
April 5, 2017: Neuron
https://www.readbyqxmd.com/read/28337854/silk-fibroin-biomaterial-shows-safe-and-effective-wound-healing-in-animal-models-and-a-randomized-controlled-clinical-trial
#9
Wei Zhang, Longkun Chen, Jialin Chen, Lingshuang Wang, Xuexian Gui, Jisheng Ran, Guowei Xu, Hongshi Zhao, Mengfeng Zeng, Junfeng Ji, Li Qian, Jianda Zhou, Hongwei Ouyang, Xiaohui Zou
Due to its excellent biological and mechanical properties, silk fibroin has been intensively explored for tissue engineering and regenerative medicine applications. However, lack of translational evidence has hampered its clinical application for tissue repair. Here a silk fibroin film is developed and its translational potential is investigated for skin repair by performing comprehensive preclinical and clinical studies to fully evaluate its safety and effectiveness. The silk fibroin film fabricated using all green chemistry approaches demonstrates remarkable characteristics, including transmittance, fluid handling capacity, moisture vapor permeability, waterproofness, bacterial barrier properties, and biocompatibility...
March 24, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28301205/intratendon-delivery-of-leukocyte-poor-platelet-rich-plasma-improves-healing-compared-with-leukocyte-rich-platelet-rich-plasma-in-a-rabbit-achilles-tendinopathy-model
#10
Ruijian Yan, Yanjia Gu, Jisheng Ran, Yejun Hu, Zefeng Zheng, Mengfeng Zeng, Boon Chin Heng, Xiao Chen, Zi Yin, Weishan Chen, Weiliang Shen, Hongwei Ouyang
BACKGROUND: Chronic tendinopathy is a commonly occurring clinical problem that affects both athletes and inactive middle-aged patients. Although some studies have shown that different platelet-rich plasma (PRP) preparations could exert various therapeutic effects in vitro, the role of leukocytes in PRP has not yet been defined under tendinopathy conditions in vivo. PURPOSE: This study compared the effects of the intratendon delivery of leukocyte-poor PRP (Lp-PRP) versus leukocyte-rich PRP (Lr-PRP) in a rabbit chronic tendinopathy model in vivo...
March 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28297584/improvement-of-in-vitro-three-dimensional-cartilage-regeneration-by-a-novel-hydrostatic-pressure-bioreactor
#11
Jie Chen, Zhaoyuan Yuan, Yu Liu, Rui Zheng, Yao Dai, Ran Tao, Huitang Xia, Hairong Liu, Zhiyong Zhang, Wenjie Zhang, Wei Liu, Yilin Cao, Guangdong Zhou
In vitro three-dimensional (3D) cartilage regeneration is a promising strategy for repair of cartilage defects. However, inferior mechanical strength and tissue homogeneity greatly restricted its clinical translation. Simulation of mechanical stress through a bioreactor is an important approach for improving in vitro cartilage regeneration. The current study developed a hydrostatic pressure (HP) bioreactor based on a novel pressure-transmitting mode achieved by slight deformation of a flexible membrane in a completely sealed stainless steel device...
March 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28297578/%C3%AE-elemene-selectively-inhibits-the-proliferation-of-glioma-stem-like-cells-through-the-downregulation-of-notch1
#12
Hai-Bin Feng, Jing Wang, Hao-Ran Jiang, Xin Mei, Yi-Ying Zhao, Fu-Rong Chen, Yue Qu, Ke Sai, Cheng-Cheng Guo, Qun-Ying Yang, Zong-Ping Zhang, Zhong-Ping Chen
Glioma is the most frequent primary central nervous system tumor. Although the current first-line medicine, temozolomide (TMZ), promotes patient survival, drug resistance develops easily. Thus, it is important to investigate novel therapeutic reagents to solidify the treatment effect. β-Elemene (bELE) is a compound from a Chinese herb whose anticancer effect has been shown in various types of cancer. However, its role in the inhibition of glioma stem-like cells (GSLCs) has not yet been reported. We studied both the in vitro and the in vivo inhibitory effect of bELE and TMZ in GSLCs and parental cells and their combined effects...
March 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28241798/leveraging-the-ehr4cr-platform-to-support-patient-inclusion-in-academic-studies-challenges-and-lessons-learned
#13
Yannick Girardeau, Justin Doods, Eric Zapletal, Gilles Chatellier, Christel Daniel, Anita Burgun, Martin Dugas, Bastien Rance
BACKGROUND: The development of Electronic Health Records (EHRs) in hospitals offers the ability to reuse data from patient care activities for clinical research. EHR4CR is a European public-private partnership aiming to develop a computerized platform that enables the re-use of data collected from EHRs over its network. However, the reproducibility of queries may depend on attributes of the local data. Our objective was 1/ to describe the different steps that were achieved in order to use the EHR4CR platform and 2/ to identify the specific issues that could impact the final performance of the platform...
February 28, 2017: BMC Medical Research Methodology
https://www.readbyqxmd.com/read/28198106/in-vitro-microfluidic-models-of-tumor-microenvironment-to-screen-transport-of-drugs-and-nanoparticles
#14
REVIEW
Altug Ozcelikkale, Hye-Ran Moon, Michael Linnes, Bumsoo Han
Advances in nanotechnology have enabled numerous types of nanoparticles (NPs) to improve drug delivery to tumors. While many NP systems have been proposed, their clinical translation has been less than anticipated primarily due to failure of current preclinical evaluation techniques to adequately model the complex interactions between the NP and physiological barriers of tumor microenvironment. This review focuses on microfluidic tumor models for characterization of delivery efficacy and toxicity of cancer nanomedicine...
February 14, 2017: Wiley Interdisciplinary Reviews. Nanomedicine and Nanobiotechnology
https://www.readbyqxmd.com/read/28197542/the-proline-arginine-dipeptide-from-hexanucleotide-repeat-expanded-c9orf72-inhibits-the-proteasome
#15
Rahul Gupta, Matthews Lan, Jelena Mojsilovic-Petrovic, Won Hoon Choi, Nathaniel Safren, Sami Barmada, Min Jae Lee, Robert Kalb
An intronic hexanucleotide repeat expansion (HRE) mutation in the C9ORF72 gene is the most common cause of familial ALS and frontotemporal dementia (FTD) and is found in ∼7% of individuals with apparently sporadic disease. Several different diamino acid peptides can be generated from the HRE by noncanonical translation (repeat-associated non-ATG translation, or RAN translation), and some of these peptides can be toxic. Here, we studied the effects of two arginine containing RAN translation products [proline/arginine repeated 20 times (PR20) and glycine/arginine repeated 20 times (GR20)] in primary rat spinal cord neuron cultures grown on an astrocyte feeder layer...
January 2017: ENeuro
https://www.readbyqxmd.com/read/28196472/premeta-a-tool-to-facilitate-meta-analysis-of-rare-variant-associations
#16
Zheng-Zheng Tang, Paul Bunn, Ran Tao, Zhouwen Liu, Dan-Yu Lin
BACKGROUND: Meta-analysis is essential to the discovery of rare variants that influence complex diseases and traits. Four major software packages, namely MASS, MetaSKAT, RAREMETAL, and seqMeta, have been developed to perform meta-analysis of rare-variant associations. These packages first generate summary statistics for each study and then perform the meta-analysis by combining the summary statistics. Because of incompatible file formats and non-equivalent summary statistics, the output files from the study-level analysis of one package cannot be directly used to perform meta-analysis in another package...
February 14, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28179980/increasing-european-support-for-neglected-infectious-disease-research
#17
REVIEW
Ole F Olesen, Marit Ackermann
Neglected infectious diseases (NIDs) are a persistent cause of death and disability in low-income countries. Currently available drugs and vaccines are often ineffective, costly or associated with severe side-effects. Although the scale of research on NIDs does not reflect their disease burden, there are encouraging signs that NIDs have begun to attract more political and public attention, which have translated into greater awareness and increased investments in NID research by both public and private donors...
2017: Computational and Structural Biotechnology Journal
https://www.readbyqxmd.com/read/28173837/insulin-like-growth-factor-1-receptor-activation-promotes-mammary-gland-tumor-development-by-increasing-glycolysis-and-promoting-biomass-production
#18
Bas Ter Braak, Christine L Siezen, Joo S Lee, Pooja Rao, Charlotte Voorhoeve, Eytan Ruppin, Jan Willem van der Laan, Bob van de Water
BACKGROUND: The insulin-like growth factor 1 (IGF1) signaling axis plays a major role in tumorigenesis. In a previous experiment, we chronically treated mice with several agonists of the IGF1 receptor (IGF1R). We found that chronic treatment with insulin analogues with high affinity towards the IGF1R (IGF1 and X10) decreased the mammary gland tumor latency time in a p53(R270H/+)WAPCre mouse model. Frequent injections with insulin analogues that only mildly activated the IGF1R in vivo (glargine and insulin) did not significantly decrease the tumor latency time in this mouse model...
February 7, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28167899/cysteine-modifications-in-the-pathogenesis-of-als
#19
REVIEW
Cristiana Valle, Maria Teresa Carrì
Several proteins are found misfolded and aggregated in sporadic and genetic forms of amyotrophic lateral sclerosis (ALS). These include superoxide dismutase (SOD1), transactive response DNA-binding protein (TDP-43), fused in sarcoma/translocated in liposarcoma protein (FUS/TLS), p62, vasolin-containing protein (VCP), Ubiquilin-2 and dipeptide repeats produced by unconventional RAN-translation of the GGGGCC expansion in C9ORF72. Up to date, functional studies have not yet revealed a common mechanism for the formation of such diverse protein inclusions...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28108609/visualization-and-quantification-of-browning-using-a-ucp1-2a-luciferase-knock-in-mouse-model
#20
Liufeng Mao, Baoming Nie, Tao Nie, Xiaoyan Hui, Xuefei Gao, Xiaoliang Lin, Xin Liu, Yong Xu, Xiaofeng Tang, Ran Yuan, Kuai Li, Peng Li, Ke Ding, Yu Wang, Aimin Xu, Jian Fei, Weiping Han, Pentao Liu, Lise Madsen, Karsten Kristiansen, Zhiguang Zhou, Sheng Ding, Donghai Wu
Both mammals and adult humans possess classic brown adipocytes and beige adipocytes, and the amount and activity of these adipocytes are considered key factors in combating obesity and its associated metabolic diseases. Uncoupling protein 1 (Ucp1) is the functional marker of both brown and beige adipocytes. To facilitate a reliable, easy, and sensitive measurement of Ucp1 expression both in vivo and in vitro, we generated a Ucp1-2A-luciferase knock-in mouse by deleting the stop codon for the mouse Ucp1 gene and replacing it with a 2A peptide...
February 2017: Diabetes
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