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https://www.readbyqxmd.com/read/28330308/construction-of-aspergillus-niger-integrated-with-cellulase-gene-from-ampullaria-gigas-spix-for-improved-enzyme-production-and-saccharification-of-alkaline-pretreated-rice-straw
#1
Peizhou Yang, Haifeng Zhang, Lili Cao, Zhi Zheng, Shaotong Jiang
Aspergillus niger is an important microorganism that has been used for decades to produce extracellular enzymes. In this study, a novel Aspergillus niger strain integrated with a eukaryotic expression vector harboring the gpd-Shi promoter of shiitake mushrooms and cellulase gene of Ampullaria gigas Spix was engineered to improve cellulase production for the achievement of highly efficient saccharification of agricultural residues. In one strain, designated ACShi27, which exhibited the highest total cellulase expression, total cellulase, endoglucanase, exoglucanase, and xylanase expression levels were 1...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330149/myb-transcription-factor-isolated-from-raphanus-sativus-enhances-anthocyanin-accumulation-in-chrysanthemum-cultivars
#2
Eun Sun Kee, Aung Htay Naing, Sun Hyung Lim, Jeung Sul Han, Chang Kil Kim
A MYB transcription factor gene, RsMYB1, from radish was introduced into the chrysanthemum cultivars 'Peach ND', 'Peach Red', and 'Vivid Scarlet' under the control of the cauliflower mosaic virus 35S promoter. Presence of RsMYB1 in transgenic lines was confirmed using polymerase chain reaction (PCR). Results of reverse-transcription-PCR analysis revealed that the expression of RsMYB1 was stable in all transgenic lines and could enhance the expression levels of three key biosynthetic genes (F3H, DFR, and ANS) involved in anthocyanin production...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28329863/understanding-the-mechanisms-of-change-in-a-lifestyle-intervention-for-older-adults
#3
Christine Juang, Bob G Knight, Mike Carlson, Stacey L Schepens Niemiec, Cheryl Vigen, Florence Clark
Purpose of the Study: This study investigated the mechanisms of change underlying an activity-based lifestyle intervention, an occupational therapy program aimed at promoting healthy habits, and routines in older adults. We examined two activity-relevant factors as potential mediators linking the intervention to reduced symptoms of depression: activity frequency and global perceptions of activity significance. Social connections and perceived control were assessed to understand how activity-related factors relate to reduced symptoms of depression...
January 24, 2017: Gerontologist
https://www.readbyqxmd.com/read/28329765/structural-insights-into-adiponectin-receptors-suggest-ceramidase-activity
#4
Ieva Vasiliauskaité-Brooks, Remy Sounier, Pascal Rochaix, Gaëtan Bellot, Mathieu Fortier, François Hoh, Luigi De Colibus, Chérine Bechara, Essa M Saied, Christoph Arenz, Cédric Leyrat, Sébastien Granier
Adiponectin receptors (ADIPORs) are integral membrane proteins that control glucose and lipid metabolism by mediating, at least in part, a cellular ceramidase activity that catalyses the hydrolysis of ceramide to produce sphingosine and a free fatty acid (FFA). The crystal structures of the two receptor subtypes, ADIPOR1 and ADIPOR2, show a similar overall seven-transmembrane-domain architecture with large unoccupied cavities and a zinc binding site within the seven transmembrane domain. However, the molecular mechanisms by which ADIPORs function are not known...
March 22, 2017: Nature
https://www.readbyqxmd.com/read/28329689/the-human-cchc-type-zinc-finger-nucleic-acid-binding-protein-binds-g-rich-elements-in-target-mrna-coding-sequences-and-promotes-translation
#5
Daniel Benhalevy, Sanjay K Gupta, Charles H Danan, Suman Ghosal, Hong-Wei Sun, Hinke G Kazemier, Katrin Paeschke, Markus Hafner, Stefan A Juranek
The CCHC-type zinc finger nucleic acid-binding protein (CNBP/ZNF9) is conserved in eukaryotes and is essential for embryonic development in mammals. It has been implicated in transcriptional, as well as post-transcriptional, gene regulation; however, its nucleic acid ligands and molecular function remain elusive. Here, we use multiple systems-wide approaches to identify CNBP targets and function. We used photoactivatable ribonucleoside-enhanced crosslinking and immunoprecipitation (PAR-CLIP) to identify 8,420 CNBP binding sites on 4,178 mRNAs...
March 21, 2017: Cell Reports
https://www.readbyqxmd.com/read/28329685/critical-role-for-gab2-in-neuroblastoma-pathogenesis-through-the-promotion-of-shp2-mycn-cooperation
#6
Xiaoling Zhang, Zhiwei Dong, Cheng Zhang, Choong Yong Ung, Shuning He, Ting Tao, Andre M Oliveira, Alexander Meves, Baoan Ji, A Thomas Look, Hu Li, Benjamin G Neel, Shizhen Zhu
Growing evidence suggests a major role for Src-homology-2-domain-containing phosphatase 2 (SHP2/PTPN11) in MYCN-driven high-risk neuroblastoma, although biologic confirmation and a plausible mechanism for this contribution are lacking. Using a zebrafish model of MYCN-overexpressing neuroblastoma, we demonstrate that mutant ptpn11 expression in the adrenal gland analog of MYCN transgenic fish promotes the proliferation of hyperplastic neuroblasts, accelerates neuroblastomagenesis, and increases tumor penetrance...
March 21, 2017: Cell Reports
https://www.readbyqxmd.com/read/28329680/major-roles-for-pyrimidine-dimers-nucleotide-excision-repair-and-atr-in-the-alternative-splicing-response-to-uv-irradiation
#7
Manuel J Muñoz, Nicolás Nieto Moreno, Luciana E Giono, Adrián E Cambindo Botto, Gwendal Dujardin, Giulia Bastianello, Stefania Lavore, Antonio Torres-Méndez, Carlos F M Menck, Benjamin J Blencowe, Manuel Irimia, Marco Foiani, Alberto R Kornblihtt
We have previously found that UV irradiation promotes RNA polymerase II (RNAPII) hyperphosphorylation and subsequent changes in alternative splicing (AS). We show now that UV-induced DNA damage is not only necessary but sufficient to trigger the AS response and that photolyase-mediated removal of the most abundant class of pyrimidine dimers (PDs) abrogates the global response to UV. We demonstrate that, in keratinocytes, RNAPII is the target, but not a sensor, of the signaling cascade initiated by PDs. The UV effect is enhanced by inhibition of gap-filling DNA synthesis, the last step in the nucleotide excision repair pathway (NER), and reduced by the absence of XPE, the main NER sensor of PDs...
March 21, 2017: Cell Reports
https://www.readbyqxmd.com/read/28329678/human-rad52-captures-and-holds-dna-strands-increases-dna-flexibility-and-prevents-melting-of-duplex-dna-implications-for-dna-recombination
#8
Ineke Brouwer, Hongshan Zhang, Andrea Candelli, Davide Normanno, Erwin J G Peterman, Gijs J L Wuite, Mauro Modesti
Human RAD52 promotes annealing of complementary single-stranded DNA (ssDNA). In-depth knowledge of RAD52-DNA interaction is required to understand how its activity is integrated in DNA repair processes. Here, we visualize individual fluorescent RAD52 complexes interacting with single DNA molecules. The interaction with ssDNA is rapid, static, and tight, where ssDNA appears to wrap around RAD52 complexes that promote intra-molecular bridging. With double-stranded DNA (dsDNA), interaction is slower, weaker, and often diffusive...
March 21, 2017: Cell Reports
https://www.readbyqxmd.com/read/28329409/spiritual-aspects-of-living-with-infertility-synthesis-of-qualitative-studies
#9
REVIEW
Joana Romeiro, Sílvia Caldeira, Vivienne Brady, Fiona Timmins, Jenny Hall
AIM: To identify the spiritual aspects of patients experiencing infertility and seek a deeper and broader meaning of the involuntary childlessness experience. BACKGROUND: Infertility can be the cause for a spiritual crisis among some couples. Those who endure this involuntary childlessness condition frequently experience contradictory feelings and needs. In this context, core aspects of spirituality such as meaning and purpose in life are often questioned. DESIGN: A review and synthesis of qualitative empirical research was undertaken in order to seek a deeper understanding of the spiritual aspects of patients' experiences of infertility...
March 22, 2017: Journal of Clinical Nursing
https://www.readbyqxmd.com/read/28329240/effect-of-breathing-oxygen-enriched-air-on-exercise-performance-in-patients-with-precapillary-pulmonary-hypertension-randomized-sham-controlled-cross-over-trial
#10
Silvia Ulrich, Elisabeth D Hasler, Stéphanie Saxer, Michael Furian, Séverine Müller-Mottet, Stephan Keusch, Konrad E Bloch
Aims: The purpose of the current trial was to test the hypothesis that breathing oxygen-enriched air increases exercise performance of patients with pulmonary arterial or chronic thrombo-embolic pulmonary hypertension (PAH/CTEPH) and to investigate involved mechanisms. Methods and results: Twenty-two patients with PAH/CTEPH, eight women, means ± SD 61 ± 14 years, resting mPAP 35 ± 9mmHg, PaO2 ambient air >7.3 kPa, underwent four bicycle ergospirometries to exhaustion on different days, while breathing oxygen-enriched (FiO2 0...
March 11, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28328949/mcpip1-alias-regnase-1-binds-and-cleaves-mrna-of-c-ebp%C3%AE
#11
Barbara Lipert, Mateusz Wilamowski, Andrzej Gorecki, Jolanta Jura
CCAAT/enhancer-binding protein beta (C/EBPβ) is a transcription factor controlling a broad range of genes essential for homeostasis, including genes related to immune functions, inflammation, metabolism and growth. Monocyte chemoattractant protein-1-induced protein 1 (MCPIP1) also called as Regnase-1 is an RNase and has been shown to decrease the stability of short-lived transcripts coding for inflammation-related proteins, including IL-1β, IL-6, IL-2, IL-8, IL-12b, IER-3, c-Rel. We found previously that the half-life of the C/EBPβ transcript is regulated by MCPIP...
2017: PloS One
https://www.readbyqxmd.com/read/28328224/site-controlled-growth-of-monolithic-ingaas-inp-quantum-well-nanopillar-lasers-on-silicon
#12
Fabian Schuster, Jonas Kapraun, Gilliard N Malheiros-Silveira, Saniya Deshpande, Connie J Chang-Hasnain
In this letter, we report the site-controlled growth of InP nanolasers on a silicon substrate with patterned SiO2 nanomasks by low-temperature metalorganic chemical vapor deposition, compatible with silicon CMOS postprocessing. A two-step growth procedure is presented to achieve smooth wurtzite faceting of vertical nanopillars. By incorporating InGaAs multi-quantum-wells, the nanopillar emission can be tuned over a wide spectral range. Enhanced quality factors of the intrinsic InP nanopillar cavities promote lasing at 0...
March 22, 2017: Nano Letters
https://www.readbyqxmd.com/read/28328191/enhancing-tumor-penetration-of-nanomedicines
#13
Qingxue Sun, Tarun Ojha, Fabian Kiessling, Twan Lammers, Yang Shi
Tumor-targeted nanomedicines have been extensively applied to alter the drawbacks and enhance the efficacy of chemotherapeutics. Despite the large number of preclinical nanomedicine studies showing initial success, their therapeutic benefit in the clinic has been rather modest, which is partially due to the inefficient tumor penetration caused by tumor microenvironment (high density of cells and extracellular matrix, increased interstitial fluid pressure). Furthermore, tumor penetration of nanomedicines is significantly influenced by physicochemical characteristics such as size, surface chemistry and shape...
March 22, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28327665/akirin2-regulates-proliferation-and-differentiation-of-porcine-skeletal-muscle-satellite-cells-via-erk1-2-and-nfatc1-signaling-pathways
#14
Xiaoling Chen, Yanliu Luo, Zhiqing Huang, Gang Jia, Guangmang Liu, Hua Zhao
Akirin2, a novel nuclear factor, plays an important role in myogenesis. To investigate the role of Akirin2 in proliferation and differentiation of porcine skeletal muscle satellite cells, Akirin2 overexpression and Akirin2 silence technologies were employed. Our results showed that overexpression of Akirin2 markedly enhanced the proliferation and differentiation of porcine skeletal muscle satellite cells, whereas silencing of Akirin2 got the opposite results. Furthermore, our results showed that Akirin2 affected proliferation and differentiation of porcine skeletal muscle satellite cells through extracellular-signal regulated kinase-1/2 (ERK1/2) and NFATc1 signaling pathways...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28327662/regulation-of-hepatic-lipogenesis-by-the-zinc-finger-protein-zbtb20
#15
Gan Liu, Luting Zhou, Hai Zhang, Rong Chen, Ye Zhang, Ling Li, Jun-Yu Lu, Hui Jiang, Dong Liu, Shasha Qi, Ying-Ming Jiang, Kai Yin, Zhifang Xie, Yuguang Shi, Yong Liu, Xuetao Cao, Yu-Xia Chen, Dajin Zou, Weiping J Zhang
Hepatic de novo lipogenesis (DNL) converts carbohydrates into triglycerides and is known to influence systemic lipid homoeostasis. Here, we demonstrate that the zinc finger protein Zbtb20 is required for DNL. Mice lacking Zbtb20 in the liver exhibit hypolipidemia and reduced levels of liver triglycerides, along with impaired hepatic lipogenesis. The expression of genes involved in glycolysis and DNL, including that of two ChREBP isoforms, is decreased in livers of knockout mice. Zbtb20 binds to and enhances the activity of the ChREBP-α promoter, suggesting that altered metabolic gene expression is mainly driven by ChREBP...
March 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/28327644/a-semisynthetic-atg3-reveals-that-acetylation-promotes-atg3-membrane-binding-and-atg8-lipidation
#16
Yi-Tong Li, Cong Yi, Chen-Chen Chen, Huan Lan, Man Pan, Shao-Jin Zhang, Yi-Chao Huang, Chao-Jian Guan, Yi-Ming Li, Li Yu, Lei Liu
Acetylation of Atg3 regulates the lipidation of the protein Atg8 in autophagy. The molecular mechanism behind this important biochemical event remains to be elucidated. We describe the first semi-synthesis of homogeneous K19/K48-diacetylated Atg3 through sequential hydrazide-based native chemical ligation. In vitro reconstitution experiments with the semi-synthetic proteins confirm that Atg3 acetylation can promote the lipidation of Atg8. We find that acetylation of Atg3 enhances its binding to phosphatidylethanolamine-containing liposomes and to endoplasmic reticulum, through which it promotes the lipidation process...
March 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/28327640/compatibility-study-of-danggui-buxue-tang-on-chemical-ingredients-angiogenesis-and-endothelial-function
#17
Ping-Lan Lin, Zhi-Cheng Li, Rui-Fang Xie, You-Hua Wang, Xin Zhou
Danggui Buxue Tang (DBT) is a classic Chinese herbal formula which consists of Astragali mongholici Radix and Angelica sinensis Radix (ASR). For chemical ingredients, HPLC were performed. Results showed compared with single herbs, DBT decoction could promote the dissolution of ingredients such as ferulic acid and calycosin. Furthermore, when ratio of AMR to ASR was 5 to 1, synthetic score was the best. For angiogenesis, normal and injured zebrafish model were applied. Results showed DBT and its ingredients had angiogenesis effects on Sub Intestinal vessels (SIVs) of normal zebrafish...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28327409/mir-23a-5p-modulates-mycobacterial-survival-and-autophagy-during-mycobacterium-tuberculosis-infection-through-tlr2-myd88-nf-%C3%AE%C2%BAb-pathway-by-targeting-tlr2
#18
Xing Gu, Yan Gao, De-Guang Mu, En-Qing Fu
Autophagy plays a pivotal role in activating the antimicrobial host defense against Mycobacterium tuberculosis (M.tb.). The emerging roles of microRNAs (miRNAs) in regulating immune responses have attracted increasing attention in recent years. Appreciating the potential of host-directed therapies designed to control autophagy during mycobacterial infection, we focused on the influence of miR-23a-5p on the activation of macrophage autophagy during M.tb. infection in bone marrow-derived macrophages (BMDMs) and murine RAW264...
March 18, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28327174/randomised-controlled-feasibility-study-of-a-school-based-multi-level-intervention-to-increase-physical-activity-and-decrease-sedentary-behaviour-among-vocational-school-students
#19
Nelli Hankonen, Matti T J Heino, Sini-Tuuli Hynynen, Hanna Laine, Vera Araújo-Soares, Falko F Sniehotta, Tommi Vasankari, Reijo Sund, Ari Haukkala
BACKGROUND: No school-based physical activity (PA) interventions among older adolescents have demonstrated long-term effectiveness, and few of them so far have addressed sedentary behaviour (SB). Based on behavioural theories and evidence, we designed a multi-level intervention to increase PA and decrease SB among vocational school students. This study investigates feasibility and acceptability of two main intervention components and research procedures. We also examine uptake of behaviour change techniques (BCTs) by the participants...
March 21, 2017: International Journal of Behavioral Nutrition and Physical Activity
https://www.readbyqxmd.com/read/28327001/autophagy-promotes-the-repair-of-radiation-induced-dna-damage-in-bone-marrow-hematopoietic-cells-via-enhanced-stat3-signaling
#20
Fei Xu, Xin Li, Lili Yan, Na Yuan, Yixuan Fang, Yan Cao, Li Xu, Xiaoying Zhang, Lan Xu, Chaorong Ge, Ni An, Gaoyue Jiang, Jialing Xie, Han Zhang, Jiayi Jiang, Xiaotian Li, Lei Yao, Suping Zhang, Daohong Zhou, Jianrong Wang
Autophagy protects hematopoietic cells from radiation damage in part by promoting DNA damage repair. However, the molecular mechanisms by which autophagy regulates DNA damage repair remain largely elusive. Here, we report that this radioprotective effect of autophagy depends on STAT3 signaling in murine bone marrow mononuclear cells (BM-MNCs). Specifically, we found that STAT3 activation and nuclear translocation in BM-MNCs were increased by activation of autophagy with an mTOR inhibitor and decreased by knockout of the autophagy gene Atg7...
March 2017: Radiation Research
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