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https://www.readbyqxmd.com/read/29109432/als-associated-mutations-in-matrin-3-alter-protein-protein-interactions-and-impede-mrna-nuclear-export
#1
Ashley Boehringer, Krystine Garcia-Mansfield, Gurkaran Singh, Nadine Bakkar, Patrick Pirrotte, Robert Bowser
Mutations in Matrin 3 have recently been linked to ALS, though the mechanism that induces disease in these patients is unknown. To define the protein interactome of wild-type and ALS-linked MATR3 mutations, we performed immunoprecipitation followed by mass spectrometry using NSC-34 cells expressing human wild-type or mutant Matrin 3. Gene ontology analysis identified a novel role for Matrin 3 in mRNA transport centered on proteins in the TRanscription and EXport (TREX) complex, known to function in mRNA biogenesis and nuclear export...
November 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29074626/human-tho-sin3a-interaction-reveals-new-mechanisms-to-prevent-r-loops-that-cause-genome%C3%A2-instability
#2
Irene Salas-Armenteros, Carmen Pérez-Calero, Aleix Bayona-Feliu, Emanuela Tumini, Rosa Luna, Andrés Aguilera
R-loops, formed by co-transcriptional DNA-RNA hybrids and a displaced DNA single strand (ssDNA), fulfill certain positive regulatory roles but are also a source of genomic instability. One key cellular mechanism to prevent R-loop accumulation centers on the conserved THO/TREX complex, an RNA-binding factor involved in transcription elongation and RNA export that contributes to messenger ribonucleoprotein (mRNP) assembly, but whose precise function is still unclear. To understand how THO restrains harmful R-loops, we searched for new THO-interacting factors...
October 26, 2017: EMBO Journal
https://www.readbyqxmd.com/read/28937147/comparison-of-effectiveness-and-safety-between-conbercept-and-ranibizumab-for-treatment-of-neovascular-age-related-macular-degeneration-a-retrospective-case-controlled-non-inferiority-multiple-center-study
#3
J Cui, D Sun, H Lu, R Dai, L Xing, H Dong, L Wang, D Wei, B Jiang, Y Jiao, M M Jablonski, S Charles, W Gu, H Chen
PurposeTo compare the efficacy and safety of conbercept and ranibizumab when administered according to a treat-and-extend (TREX) protocol for the treatment of neovascular age-related macular degeneration (AMD) in China.Patients and methodsBetween May 2014 and May 2015, 180 patients were treated in a 1 : 1 ratio using conbercept or ranibizumab from four hospitals. Patients received either conbercept 0.5 mg or ranibizumab 0.5 mg intravitreal injections. Follow-up time was 1 year and treated based on a TREX approach...
September 22, 2017: Eye
https://www.readbyqxmd.com/read/28934468/alyref-mainly-binds-to-the-5-and-the-3-regions-of-the-mrna-in-vivo
#4
Min Shi, Heng Zhang, Xudong Wu, Zhisong He, Lantian Wang, Shanye Yin, Bin Tian, Guohui Li, Hong Cheng
The TREX complex (TREX) plays key roles in nuclear export of mRNAs. However, little is known about its transcriptome-wide binding targets. We used individual cross-linking and immunoprecipitation (iCLIP) to identify the binding sites of ALYREF, an mRNA export adaptor in TREX, in human cells. Consistent with previous in vitro studies, ALYREF binds to a region near the 5' end of the mRNA in a CBP80-dependent manner. Unexpectedly, we identified PABPN1-dependent ALYREF binding near the 3' end of the mRNA. Furthermore, the 3' processing factor CstF64 directly interacts with ALYREF and is required for the overall binding of ALYREF on the mRNA...
September 19, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28885356/correlations-between-lumbar-neuromuscular-function-and-pain-lumbar-disability-in-patients-with-nonspecific-low-back-pain-a-cross-sectional-study
#5
Haoyu Hu, Yili Zheng, Xueqiang Wang, Binglin Chen, Yulin Dong, Juan Zhang, Xiaochen Liu, Di Gong
This study aims to examine the correlations between lumbar neuromuscular function and pain, lumbar disability in patients with nonspecific low back pain (NSLBP).Ninety patients, with ages 18 to 37 years old, with NSLBP were recruited in this study. The lumbar neuromuscular function was tested by the CON-TREX multijoint isokinetic test and training machine. This study uses the visual analog scale (VAS) and Roland-Morris Disability Questionnaire (RMDQ) to evaluate the pain and the dysfunction index of patients who have low back pain, respectively...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28844088/familial-chilblain-lupus-what-can-we-learn-from-type-i-interferonopathies
#6
REVIEW
Christoph Fiehn
PURPOSE OF REVIEW: Familial chilblain lupus belongs to the group of type I interferonopathies and is characterized by typical skin manifestations and acral ischaemia. This review aims to give an overview of clinical signs and the pathophysiological mechanisms. RECENT FINDINGS: There are several mutations that can lead to this autosomal dominant disease. Most frequent is a mutation of the gene for TREX-1. However, as well cases of families with mutations in the SAMHD1 gene and, recently, with one for the gene that codes for the protein stimulator of interferon genes have been described...
August 26, 2017: Current Rheumatology Reports
https://www.readbyqxmd.com/read/28713458/trunk-strength-characteristics-of-elite-alpine-skiers-a-comparison-with-physically-active-controls
#7
Carolin Hildebrandt, Lisa Müller, Christian Heisse, Christian Raschner
Core muscle imbalances and weak trunk strength are relevant for injury prevention and performance. Information regarding core strength requirements and ideal flexion/extension ratios in alpine skiing is limited. We aimed to compare trunk strength capacities in elite alpine skiers with those of a matched control group. The concentric maximal trunk flexion and extension of 109 elite skiers and 47 active controls were measured at 150°/s in a ballistic mode using the CON-TREX® TP 1000 test system. The relative flexion peak torque was higher in male ski racers (p = 0...
June 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28709586/muscle-strength-can-better-differentiate-between-gradations-of-functional-performance-than-muscle-quality-in-healthy-50-70y-women
#8
Peter Francis, William McCormack, Clodagh Toomey, Mark Lyons, Philip Jakeman
OBJECTIVE: It is not known which laboratory indices of muscle mass, strength or quality can distinguish functional performance in healthy middle aged women. The aim of this study was to (a) examine the association between upper leg lean tissue mass, knee extensor strength, muscle quality (strength per unit lean tissue mass) and functional performance and (b) to determine the utility of tertiles of muscle strength and muscle quality to distinguish gradations of functional capacity in healthy 50-70y women...
July 3, 2017: Brazilian Journal of Physical Therapy
https://www.readbyqxmd.com/read/28681639/development-of-a-field-deployable-method-for-simultaneous-real-time-measurements-of-the-four-most-abundant-n2o-isotopocules
#9
Erkan Ibraim, Eliza Harris, Simon Eyer, Béla Tuzson, Lukas Emmenegger, Johan Six, Joachim Mohn
Understanding and quantifying the biogeochemical cycle of N2O is essential to develop effective N2O emission mitigation strategies. This study presents a novel, fully automated measurement technique that allows simultaneous, high-precision quantification of the four main N2O isotopocules ((14)N(14)N(16)O, (14)N(15)N(16)O, (15)N(14)N(16)O and (14)N(14)N(18)O) in ambient air. The instrumentation consists of a trace gas extractor (TREX) coupled to a quantum cascade laser absorption spectrometer, designed for autonomous operation at remote measurement sites...
July 6, 2017: Isotopes in Environmental and Health Studies
https://www.readbyqxmd.com/read/28552357/the-tho-complex-non-cell-autonomously-represses-female-germline-specification-through-the-tas3-arf3-module
#10
Zhenxia Su, Lihua Zhao, Yuanyuan Zhao, Shaofang Li, SoYoun Won, Hanyang Cai, Lulu Wang, Zhenfang Li, Piaojuan Chen, Yuan Qin, Xuemei Chen
In most sexually reproducing plants, a single somatic, sub-epidermal cell in an ovule is selected to differentiate into a megaspore mother cell, which is committed to giving rise to the female germline. However, it remains unclear how intercellular signaling among somatic cells results in only one cell in the sub-epidermal layer differentiating into the megaspore mother cell. Here we uncovered a role of the THO complex in restricting the megaspore mother cell fate to a single cell. Mutations in TEX1, HPR1, and THO6, components of the THO/TREX complex, led to the formation of multiple megaspore mother cells, which were able to initiate gametogenesis...
June 5, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28475181/a-systematic-review-to-assess-the-treat-and-extend-dosing-regimen-for-neovascular-age-related-macular-degeneration-using-ranibizumab
#11
REVIEW
S R Rufai, H Almuhtaseb, R M Paul, B L Stuart, T Kendrick, H Lee, A J Lotery
Age-related macular degeneration (AMD) is the leading cause of irreversible blindness in the developed world. Monthly or as-needed (PRN) dosing strategies of intravitreal ranibizumab have been established as efficacious treatment options for neovascular AMD. More recently, the 'treat-and-extend' dosing regimen (TREX) is being adopted in clinical practice as it represents a patient-centric and economical option, reducing treatment burden by extending injection intervals when possible. However, the efficacy of TREX using ranibizumab monotherapy remains to be defined...
September 2017: Eye
https://www.readbyqxmd.com/read/28389709/-familial-chilblain-lupus-type-1-interferonopathy-with-model-character
#12
REVIEW
C Fiehn
Familial chilblain lupus belongs to the group of type 1 interferonopathies and is particularly characterized by typical skin manifestations and ischemia of the acra. There are various mutations that can lead to this autosomal dominant disease. A mutation in the TREX-1 gene has been most frequently found; however, families with mutations in the SAMHD1 gene and recently in the gene which codes for the stimulator of interferon genes (STING) protein were also described. A common feature of these genetic defects is that they are all involved in the process of detection of intracellular free DNA, which as a result leads to increased production of type 1 interferons and the induced gene products...
May 2017: Zeitschrift Für Rheumatologie
https://www.readbyqxmd.com/read/28334829/structure-of-the-sac3-rna-binding-m-region-in-the-saccharomyces-cerevisiae-trex-2-complex
#13
James M B Gordon, Shintaro Aibara, Murray Stewart
Transcription-export complex 2 (TREX-2, or THSC) facilitates localization of actively transcribing genes such as GAL1 to the nuclear periphery, contributes to the generation of export-competent mRNPs and influences gene expression through interactions with Mediator. TREX-2 is based on a Sac3 scaffold to which Thp1, Sem1, Cdc31 and Sus1 bind and consists of three modules: the N-region (Sac3∼1-100), which binds mRNA export factor Mex67:Mtr2; the M-region, in which Thp1 and Sem1 bind to Sac3∼100-550; and the CID region in which Cdc31 and two Sus1 chains bind to Sac3∼720-805...
May 19, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28064320/-interactions-of-the-trex-2-complex-with-mrnp-particle-of-%C3%AE-tubulin-56d-gene
#14
V V Popova, A A Glukhova, S G Georgieva, G P Georgiev, D V Kopytova
mRNA transport from the nucleus to the cytoplasm is an essential step of eukaryotic gene expression. A pre-mRNA molecule undergoes modification, such as 5'-capping, splicing, and 3'-end processing, in the nucleus. The molecule being modified interacts with a large number of proteins and, thus, mRNP particles are formed. The binding of factors involved in nuclear export also occurs during transcription and mRNA processing. We have shown that the functioning of TREX-2, an mRNA export complex, is restricted to the nucleus...
November 2016: Molekuliarnaia Biologiia
https://www.readbyqxmd.com/read/28004241/the-arabidopsis-tho-trex-component-tex1-functionally-interacts-with-mos11-and-modulates-mrna-export-and-alternative-splicing-events
#15
Brian B Sørensen, Hans F Ehrnsberger, Silvia Esposito, Alexander Pfab, Astrid Bruckmann, Judith Hauptmann, Gunter Meister, Rainer Merkl, Thomas Schubert, Gernot Längst, Michael Melzer, Marion Grasser, Klaus D Grasser
We identify proteins that associate with the THO core complex, and show that the TEX1 and MOS11 components functionally interact, affecting mRNA export and splicing as well as plant development. TREX (TRanscription-EXport) is a multiprotein complex that plays a central role in the coordination of synthesis, processing and nuclear export of mRNAs. Using targeted proteomics, we identified proteins that associate with the THO core complex of Arabidopsis TREX. In addition to the RNA helicase UAP56 and the mRNA export factors ALY2-4 and MOS11 we detected interactions with the mRNA export complex TREX-2 and multiple spliceosomal components...
February 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/27933408/twelve-weeks-progressive-resistance-training-combined-with-protein-supplementation-beyond-habitual-intakes-increases-upper-leg-lean-tissue-mass-muscle-strength-and-extended-gait-speed-in-healthy-older-women
#16
Peter Francis, William Mc Cormack, Clodagh Toomey, Catherine Norton, Jean Saunders, Emmet Kerin, Mark Lyons, Philip Jakeman
The age-related decline in functional capability is preceded by a reduction in muscle quality. The purpose of this study was to assess the combined effects of progressive resistance training (PRT) and protein supplementation beyond habitual intakes on upper leg lean tissue mass (LTM), muscle quality and functional capability in healthy 50-70 years women. In a single-blinded, randomized, controlled design, 57 healthy older women (age 61.1 ± 5.1 years, 1.61 ± 0.65 m, 65.3 ± 15.3 kg) consumed 0.33 g/kg body mass of a milk-based protein matrix (PRO) for 12 weeks...
December 8, 2016: Biogerontology
https://www.readbyqxmd.com/read/27900689/novel-tools-for-the-functional-expression-of-metagenomic-dna
#17
Nadine Katzke, Andreas Knapp, Anita Loeschcke, Thomas Drepper, Karl-Erich Jaeger
Functional expression of genes from metagenomic libraries is limited by various factors including inefficient transcription and/or translation of target genes as well as improper folding and assembly of the corresponding proteins caused by the lack of appropriate chaperones and cofactors. It is now well accepted that the use of different expression hosts of distinct phylogeny and physiology can dramatically increase the rate of success. In the following chapter, we therefore describe tools and protocols allowing for the comparative heterologous expression of genes in five bacterial expression hosts, namely Escherichia coli, Pseudomonas putida, Bacillus subtilis, Burkholderia glumae, and Rhodobacter capsulatus...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27884288/trex-through-cutaneous-health%C3%A2-and%C3%A2-disease
#18
COMPARATIVE STUDY
Alicia R Mathers
TREX1 and 2 are exonucleases that repair and degrade DNA. Degradation of DNA is involved in maintaining the integrity of the epidermis. The importance of these enzymes to cutaneous integrity is observed when TREX1 and TREX2 pathways become aberrant, and autoimmune or cancerous diseases ensue. Manils et al. have now shown that overexpression of TREX2 may play a role in potentiating psoriasis. Thus, these pathways are likely targets for novel therapeutics.
December 2016: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/27863845/macular-atrophy-in-neovascular-age-related-macular-degeneration-with-monthly-versus-treat-and-extend-ranibizumab-findings-from-the-trex-amd-trial
#19
RANDOMIZED CONTROLLED TRIAL
Nizar S Abdelfattah, Mayss Al-Sheikh, Sean Pitetta, Ahmed Mousa, SriniVas R Sadda, Charles C Wykoff
PURPOSE: To compare the enlargement rate of macular atrophy (ERMA) in eyes treated with ranibizumab monthly or using a treat-and-extend (TREX) regimen for neovascular age-related macular degeneration (AMD) or fellow control eyes, as well as analyze risk factors for macular atrophy (MA) development and progression. DESIGN: Eighteen-month, multicenter, randomized, controlled clinical trial. PARTICIPANTS: Sixty patients with treatment-naïve neovascular AMD in 1 eye randomized 1:2 to monthly or TREX ranibizumab...
February 2017: Ophthalmology
https://www.readbyqxmd.com/read/27836430/randomized-trial-of-treat-and-extend-ranibizumab-with-and-without-navigated-laser-for-diabetic-macular-edema-trex-dme-1-year-outcomes
#20
John F Payne, Charles C Wykoff, W Lloyd Clark, Beau B Bruce, David S Boyer, David M Brown
PURPOSE: To compare monthly dosing with a treat and extend algorithm using ranibizumab 0.3 mg with and without angiography-guided macular laser photocoagulation for center-involving diabetic macular edema (DME). DESIGN: Multicenter, prospective, randomized clinical trial. PARTICIPANTS: A total of 150 eyes from 116 subjects were randomized into 3 cohorts: Monthly (n = 30), TReat and EXtend without macular laser photocoagulation (TREX; n = 60), and treat and extend with angiography-GuIded macular LAser photocoagulation (GILA; n = 60)...
January 2017: Ophthalmology
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