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https://www.readbyqxmd.com/read/27923061/comparative-transcriptomic-and-epigenomic-analyses-reveal-new-regulators-of-murine-brown-adipogenesis
#1
Reinhard Brunmeir, Jingyi Wu, Xu Peng, Sun-Yee Kim, Sofi G Julien, Qiongyi Zhang, Wei Xie, Feng Xu
Increasing energy expenditure through brown adipocyte recruitment is a promising approach to combat obesity. We report here the comprehensive profiling of the epigenome and transcriptome throughout the lineage commitment and differentiation of C3H10T1/2 mesenchymal stem cell line into brown adipocytes. Through direct comparison to datasets from differentiating white adipocytes, we systematically identify stage- and lineage-specific coding genes, lncRNAs and microRNAs. Utilizing chromatin state maps, we also define stage- and lineage-specific enhancers, including super-enhancers, and their associated transcription factor binding motifs and genes...
December 2016: PLoS Genetics
https://www.readbyqxmd.com/read/27922280/ganetespib-for-small-cell-lung-cancer
#2
Deepa S Subramaniam, Eiran A Warner, Giuseppe Giaccone
Heat shock proteins (Hsps) are part of a complex network of chaperone proteins that are critically involved in the conformational maturation of intracellular proteins and regulate their degradation via the proteasome system Hsps (especially Hsp70 and Hsp90) are upregulated in many cancers and are potentially attractive therapeutic targets. Ganetespib is a potent non-geldanamycin analogue, and avoids the toxicities associated with older analogues due to its small molecular weight, lipophilicity and the absence of the benzoquinone moiety; strong pre-clinical data support its evaluation in lung cancer, especially small cell lung cancer (SCLC)...
December 6, 2016: Expert Opinion on Investigational Drugs
https://www.readbyqxmd.com/read/27917907/ecat1-is-essential-for-human-oocyte-maturation-and-pre-implantation-development-of-the-resulting-embryos
#3
Changyu Liu, Min Li, Tianjie Li, Hongcui Zhao, Jin Huang, Yun Wang, Qian Gao, Yang Yu, Qinghua Shi
ECAT1 is a subunit of the subcortical maternal complex that is required for cell cycle progression during pre-implantation embryonic development; however, its exact function remains to be elucidated. Here we investigated the expression of ECAT1 in human ovarian tissue, oocytes and pre-implantation embryos and assessed its function by using RNA interference (RNAi) in oocytes. ECAT1 mRNA was highly expressed in human oocytes and zygotes, as well as in two-cell, four-cell and eight-cell embryos, but declined significantly in morulae and blastocysts...
December 5, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27917856/biogenic-synthesis-of-zinc-oxide-nanostructures-from-nigella-sativa-seed-prospective-role-as-food-packaging-material-inhibiting-broad-spectrum-quorum-sensing-and-biofilm
#4
Nasser A Al-Shabib, Fohad Mabood Husain, Faheem Ahmed, Rais Ahmad Khan, Iqbal Ahmad, Edreese Alsharaeh, Mohd Shahnawaz Khan, Afzal Hussain, Md Tabish Rehman, Mohammad Yusuf, Iftekhar Hassan, Javed Masood Khan, Ghulam Md Ashraf, Ali Mohammed Alsalme, Mohamed F Al-Ajmi, Vadim V Tarasov, Gjumrakch Aliev
Bacterial spoilage of food products is regulated by density dependent communication system called quorum sensing (QS). QS control biofilm formation in numerous food pathogens and Biofilms formed on food surfaces act as carriers of bacterial contamination leading to spoilage of food and health hazards. Agents inhibiting or interfering with bacterial QS and biofilm are gaining importance as a novel class of next-generation food preservatives/packaging material. In the present study, Zinc nanostructures were synthesised using Nigella sativa seed extract (NS-ZnNPs)...
December 5, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27917571/comparative-germination-responses-to-water-potential-across-different-populations-of-aegilops-geniculata-and-cultivar-varieties-of-triticum-durum-and-t-aestivum
#5
Simone Orsenigo, Filippo Guzzon, Thomas Abeli, Graziano Rossi, Ilda Vagge, Alma Balestrazzi, Andrea Mondoni, Jonas V Müller
Crop Wild Relatives (CWRs) are often used to improve crop quality and yields, because they contain genetically important traits that can contribute to stress resistance and adaptation. Here, seed germination of different populations of Aegilops geniculata Roth collected along a latitudinal gradient was studied under different drought stress in order to find populations suitable for improving drought tolerance in wheat. Different accessions of Aegilops neglecta Req. ex Bertol., Triticum aestivum L. and T. durum Desf...
December 5, 2016: Plant Biology
https://www.readbyqxmd.com/read/27914933/differential-synthesis-and-release-of-il-18-and-il-18-binding-protein-from-human-platelets-and-their-implications-for-hiv-infection
#6
Ossama Allam, Suzanne Samarani, Mohammad-Ali Jenabian, Jean-Pierre Routy, Cecile Tremblay, Devendra Amre, Ali Ahmad
IL-18 is a pro-inflammatory cytokine belonging to the IL-1 family and is produced in the body from macrophages, epithelial and dendritic cells, keratinocytes, adrenal cortex etc. The cytokine is produced as an inactive precursor that is cleaved inside cells into its mature form by activated caspase 1, which exists as an inactive precursor in human cells and requires assembly of an inflammasomes for its activation. We show here for the first time that human platelets contain transcripts for the IL-18 gene. They synthesize the cytokine de novo, process and release it upon activation...
December 1, 2016: Cytokine
https://www.readbyqxmd.com/read/27913890/performance-improvement-of-raw-water-pretreatment-process-with-pre-inoculation-biofilm-feasibility-and-limiting-factors
#7
Guang-Feng Yang, Li-Juan Feng, Cai-Rong Guo, Tian Xia, Xiang-Yang Xu, Liang Zhu
The initial formation of biofilm and the removal performance of pollutants in biological pretreatment process for polluted raw water were limited due to the oligotrophic niche in raw water. In this study, the feasibility of using pre-inoculation biofilm formed under nutrients enhanced condition for polluted raw water treatment was analyzed in nine batch reactors. Results showed that the pollutants removal performance of biofilm was improved under nutrients enhanced conditions. Ammonia oxidation rate (AOR) was exponentially increased with the increasing in NH4(+)-N levels, and organic matter removal rate (ORR) was positively related to the initial total organic carbon (TOC) concentration...
December 2, 2016: Biodegradation
https://www.readbyqxmd.com/read/27913638/ms23-a-master-basic-helix-loop-helix-factor-regulates-the-specification-and-development-of-tapetum-in-maize
#8
Guo-Ling Nan, Jixian Zhai, Siwaret Arikit, Darren Morrow, John Fernandes, Lan Mai, Nhi Nguyen, Blake C Meyers, Virginia Walbot
Successful male gametogenesis involves orchestration of sequential gene regulation for somatic differentiation in pre-meiotic anthers. We report here the cloning of Male Sterile23 (Ms23), encoding an anther-specific predicted basic helix-loop-helix (bHLH) transcription factor required for tapetal differentiation; transcripts localize initially to the precursor secondary parietal cells then predominantly to daughter tapetal cells. In knockout ms23-ref mutant anthers, five instead of the normal four wall layers are observed...
December 2, 2016: Development
https://www.readbyqxmd.com/read/27910387/a-phase-contrast-imaging-interferometer-system-for-detection-of-multiscale-electron-density-fluctuations-on-diii-d
#9
E M Davis, J C Rost, M Porkolab, A Marinoni, M A Van Zeeland
Heterodyne interferometry and phase contrast imaging (PCI) are robust, mature techniques for measuring low-k and high-k electron density fluctuations, respectively. This work describes the first-ever implementation of a combined PCI-interferometer. The combined system uses a single 10.6 μm probe beam, two interference schemes, and two detectors to measure electron density fluctuations at large spatiotemporal bandwidth (10 kHz <f < 5 MHz and 0 cm(-1) ≤k ≤ 20 cm(-1)), allowing simultaneous measurement of ion- and electron-scale instabilities...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27909687/morphogenesis-of-human-embryonic-stem-cells-into-mature-neurons-under-in-vitro-culture-conditions
#10
Geeta Shroff
AIM: To describe the morphogenesis of different neuronal cells from the human embryonic stem cell (hESC) line, SCT-N, under in vitro culture conditions. METHODS: The directed neuronal cell line was produced from a single, spare, pre-implantation stage fertilized ovum that was obtained during a natural in vitro fertilization process. The hESCs were cultured and maintained as per our proprietary in-house technology in a Good Manufacturing Practice, Good Laboratory Practice and Good Tissue Practice compliant laboratory...
November 20, 2016: World Journal of Experimental Medicine
https://www.readbyqxmd.com/read/27907888/a-novel-role-for-gsk3%C3%AE-as-a-modulator-of-drosha-microprocessor-activity-and-microrna-biogenesis
#11
Claire E Fletcher, Jack D Godfrey, Akifumi Shibakawa, Martin Bushell, Charlotte L Bevan
Regulation of microRNA (miR) biogenesis is complex and stringently controlled. Here, we identify the kinase GSK3β as an important modulator of miR biogenesis at Microprocessor level. Repression of GSK3β activity reduces Drosha activity toward pri-miRs, leading to accumulation of unprocessed pri-miRs and reduction of pre-miRs and mature miRs without altering levels or cellular localisation of miR biogenesis proteins. Conversely, GSK3β activation increases Drosha activity and mature miR accumulation. GSK3β achieves this through promoting Drosha:cofactor and Drosha:pri-miR interactions: it binds to DGCR8 and p72 in the Microprocessor, an effect dependent upon presence of RNA...
October 23, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27905059/exposure-to-secondhand-smoke-impairs-fracture-healing-in-rats
#12
Hildemberg A R Santiago, Ariane Zamarioli, Manoel D Sousa Neto, Jose B Volpon
BACKGROUND: Nonsmokers may be affected by environmental tobacco smoke (secondhand smoke), but the effects of such exposure on fracture healing have not been well studied. QUESTIONS/PURPOSES: To explore the possible effects of passive inhalation of tobacco smoke on the healing of a diaphyseal fracture in femurs of rats. We hypothesized that secondhand exposure to tobacco smoke adversely affects fracture healing. METHODS: A mid-diaphyseal fracture was created in the femur of 41 female Wistar rats and fixed with an intramedullary metallic pin; 14 rats were excluded (nine for inadequate fractures and five for K wire extrusion)...
November 30, 2016: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27902778/an-insecticide-further-enhances-experience-dependent-increased-behavioural-responses-to-sex-pheromone-in-a-pest-insect
#13
Antoine Abrieux, Amel Mhamdi, Kaouther K Rabhi, Julie Egon, Stéphane Debernard, Line Duportets, Hélène Tricoire-Leignel, Sylvia Anton, Christophe Gadenne
Neonicotinoid insecticides are widely used to protect plants against pest insects, and insecticide residues remaining in the environment affect both target and non-target organisms. Whereas low doses of neonicotinoids have been shown to disturb the behaviour of pollinating insects, recent studies have revealed that a low dose of the neonicotinoid clothianidin can improve behavioural and neuronal sex pheromone responses in a pest insect, the male moth Agrotis ipsilon, and thus potentially improve reproduction...
2016: PloS One
https://www.readbyqxmd.com/read/27901020/structural-decoding-of-netrin-4-reveals-a-regulatory-function-towards-mature-basement-membranes
#14
Raphael Reuten, Trushar R Patel, Matthew McDougall, Nicolas Rama, Denise Nikodemus, Benjamin Gibert, Jean-Guy Delcros, Carina Prein, Markus Meier, Stéphanie Metzger, Zhigang Zhou, Jennifer Kaltenberg, Karen K McKee, Tobias Bald, Thomas Tüting, Paola Zigrino, Valentin Djonov, Wilhelm Bloch, Hauke Clausen-Schaumann, Ernst Poschl, Peter D Yurchenco, Martin Ehrbar, Patrick Mehlen, Jörg Stetefeld, Manuel Koch
Netrins, a family of laminin-related molecules, have been proposed to act as guidance cues either during nervous system development or the establishment of the vascular system. This was clearly demonstrated for netrin-1 via its interaction with the receptors DCC and UNC5s. However, mainly based on shared homologies with netrin-1, netrin-4 was also proposed to play a role in neuronal outgrowth and developmental/pathological angiogenesis via interactions with netrin-1 receptors. Here, we present the high-resolution structure of netrin-4, which shows unique features in comparison with netrin-1, and show that it does not bind directly to any of the known netrin-1 receptors...
November 30, 2016: Nature Communications
https://www.readbyqxmd.com/read/27899719/a-novel-hypothesis-for-histone-to-protamine-transition-in-bos-taurus-spermatozoa
#15
Gerly Sillaste, Lauris Kaplinski, Riho Meier, Ülle Jaakma, Elo Eriste, Andres Salumets
DNA compaction with protamines in sperm is essential for successful fertilization. However, a portion of sperm chromatin remains less tightly packed with histones, which genomic location and function remain unclear. We extracted and sequenced histone-associated DNA from sperm of nine ejaculates from three bulls. We found that the fraction of retained histones varied between samples but the variance was similar between samples from the same and different individuals. The most conserved regions showed similar abundance across all samples, while in other regions their presence correlated with the size of histone fraction...
November 29, 2016: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/27899605/poly-a-specific-ribonuclease-regulates-the-processing-of-small-subunit-rrnas-in-human-cells
#16
Hideaki Ishikawa, Harunori Yoshikawa, Keiichi Izumikawa, Yutaka Miura, Masato Taoka, Yuko Nobe, Yoshio Yamauchi, Hiroshi Nakayama, Richard J Simpson, Toshiaki Isobe
Ribosome biogenesis occurs successively in the nucleolus, nucleoplasm, and cytoplasm. Maturation of the ribosomal small subunit is completed in the cytoplasm by incorporation of a particular class of ribosomal proteins and final cleavage of 18S-E pre-rRNA (18S-E). Here, we show that poly(A)-specific ribonuclease (PARN) participates in steps leading to 18S-E maturation in human cells. We found PARN as a novel component of the pre-40S particle pulled down with the pre-ribosome factor LTV1 or Bystin. Reverse pull-down analysis revealed that PARN is a constitutive component of the Bystin-associated pre-40S particle...
November 28, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27899486/functional-investigations-of-hnf1a-identify-rare-variants-as-risk-factors-for-type-2-diabetes-in-the-general-population
#17
Laeya Abdoli Najmi, Ingvild Aukrust, Jason Flannick, Janne Molnes, Noel Burtt, Anders Molven, Leif Groop, David Altshuler, Stefan Johansson, Lise Bjørkhaug, Pål Rasmus Njølstad
Variants in HNF1A encoding hepatocyte nuclear factor-1A are associated with maturity-onset diabetes of the young (MODY3) and type 2 diabetes. We investigated whether functional classification of HNF1A rare coding variants can inform models of diabetes risk prediction in the general population by analyzing the effect of 27 HNF1A variants identified in well-phenotyped populations (n = 4115). Bioinformatics tools classified 11 variants as likely pathogenic and showed no association with diabetes risk (combined MAF = 0...
November 29, 2016: Diabetes
https://www.readbyqxmd.com/read/27897222/nadph-oxidase-gp91-phox-contributes-to-rankl-induced-osteoclast-differentiation-by-upregulating-nfatc1
#18
In Soon Kang, Chaekyun Kim
Bone-marrow derived monocyte-macrophages (BMMs) differentiate into osteoclasts by M-CSF along subsequent RANKL stimulation possibly in collaboration with many other unknown cytokines released by pre- or mature osteoblasts. The differentiation process requires receptor activator of nuclear factor kappa-B ligand (RANKL)/RANK signaling and reactive oxygen species (ROS) such as superoxide anion (O2(•-)). Gp91(phox), a plasma membrane subunit of NADPH oxidase (Nox), is constitutively expressed in BMMs and plays a major role in superoxide anion production...
November 29, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27897208/beta-1-integrin-ligation-and-tlr-ligation-enhance-gm-csf-induced-aldh1a2-expression-in-dendritic-cells-but-differentially-regulate-their-anti-inflammatory-properties
#19
Aya Yokota-Nakatsuma, Yoshiharu Ohoka, Hajime Takeuchi, Si-Young Song, Makoto Iwata
Retinoic acid (RA)-producing CD103(+) mature dendritic cells (DCs) in mesenteric lymph nodes (MLNs) play crucial roles in gut immunity. GM-CSF and RA contribute to the expression of the RA-producing enzyme ALDH1A2. However, additional signals appeared to be required for inducing ALDH1A2(high) mature DCs from immature DCs. We found here that TLR ligands (Ls) and immobilized E-cadherin could provide such signals in FLT3-L-generated bone marrow (BM)-derived DCs after treatment with GM-CSF and the RA receptor agonist Am80...
November 29, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27895648/grape-ripening-is-regulated-by-deficit-irrigation-elevated-temperatures-according-to-cluster-position-in-the-canopy
#20
Olfa Zarrouk, Cecilia Brunetti, Ricardo Egipto, Carla Pinheiro, Tânia Genebra, Antonella Gori, Carlos M Lopes, Massimiliano Tattini, M Manuela Chaves
The impact of water deficit on berry quality has been extensively investigated during the last decades. Nonetheless, there is a scarcity of knowledge on the performance of varieties exposed to a combination of high temperatures/water stress during the growing season and under vineyard conditions. The objective of this research was to investigate the effects of two irrigation regimes, sustained deficit irrigation (SDI, 30% ETc) and regulated deficit irrigation (RDI, 15% ETc) and of two cluster positions within the canopy (east- and west-exposed sides) on berry ripening in red Aragonez (Tempranillo) grapevines...
2016: Frontiers in Plant Science
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