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https://www.readbyqxmd.com/read/29152671/comparative-transcriptome-analysis-provides-insights-into-differentially-expressed-genes-and-long-non-coding-rnas-between-ovary-and-testis-of-the-mud-crab-scylla-paramamosain
#1
Xiaolong Yang, Mhd Ikhwanuddin, Xincang Li, Fan Lin, Qingyang Wu, Yueling Zhang, Cuihong You, Wenhua Liu, Yinwei Cheng, Xi Shi, Shuqi Wang, Hongyu Ma
The molecular mechanism underlying sex determination and gonadal differentiation of the mud crab (Scylla paramamosain) has received considerable attention, due to the remarkably biological and economic differences between sexes. However, sex-biased genes, especially non-coding genes, which account for these differences, remain elusive in this crustacean species. In this study, the first de novo gonad transcriptome sequencing was performed to identify both differentially expressed genes and long non-coding RNAs (lncRNAs) between male and female S...
November 20, 2017: Marine Biotechnology
https://www.readbyqxmd.com/read/29133872/the-core-promoter-factor-trf2-mediates-a-fruitless-action-to-masculinize-neurobehavioral-traits-in-drosophila
#2
Zahid Sadek Chowdhury, Kosei Sato, Daisuke Yamamoto
In fruit flies, the male-specific fruitless (fru) gene product FruBM plays a central role in establishing the neural circuitry for male courtship behavior by orchestrating the transcription of genes required for the male-type specification of individual neurons. We herein identify the core promoter recognition factor gene Trf2 as a dominant modifier of fru actions. Trf2 knockdown in the sexually dimorphic mAL neurons leads to the loss of a male-specific neurite and a reduction in male courtship vigor. TRF2 forms a repressor complex with FruBM, strongly enhancing the repressor activity of FruBM at the promoter region of the robo1 gene, whose function is required for inhibiting the male-specific neurite formation...
November 14, 2017: Nature Communications
https://www.readbyqxmd.com/read/29109241/optogenetic-activation-of-the-fruitless-labeled-circuitry-in-drosophila-subobscura-males-induces-mating-motor-acts
#3
Ryoya Tanaka, Tomohiro Higuchi, Soh Kohatsu, Kosei Sato, Daisuke Yamamoto
It remains an enigma how the nervous system of different animal species produces different behaviors. We studied the neural circuitry for mating behavior in Drosophila subobscura, a species that displays unique courtship actions not shared by other members of the genera including the genetic model D. melanogaster, in which the core courtship circuitry has been identified. We disrupted the D. subobscurafruitless (fru) gene, a master regulator for the courtship circuitry formation in D. melanogaster, resulting in complete loss of mating behavior...
November 6, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29089625/modes-of-carbon-fixation-in-an-arsenic-and-co2-rich-shallow-hydrothermal-ecosystem
#4
Nolwenn Callac, Nicole R Posth, Jayne E Rattray, Kweku K Y Yamoah, Alan Wiech, Magnus Ivarsson, Christoffer Hemmingsson, Stephanos P Kilias, Ariadne Argyraki, Curt Broman, Henrik Skogby, Rienk H Smittenberg, Ernest Chi Fru
The seafloor sediments of Spathi Bay, Milos Island, Greece, are part of the largest arsenic-CO2-rich shallow submarine hydrothermal ecosystem on Earth. Here, white and brown deposits cap chemically distinct sediments with varying hydrothermal influence. All sediments contain abundant genes for autotrophic carbon fixation used in the Calvin-Benson-Bassham (CBB) and reverse tricaboxylic acid (rTCA) cycles. Both forms of RuBisCO, together with ATP citrate lyase genes in the rTCA cycle, increase with distance from the active hydrothermal centres and decrease with sediment depth...
October 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29030563/methane-fluxes-from-coastal-sediments-are-enhanced-by-macrofauna
#5
Stefano Bonaglia, Volker Brüchert, Nolwenn Callac, Alessandra Vicenzi, Ernest Chi Fru, Francisco J A Nascimento
Methane and nitrous oxide are potent greenhouse gases (GHGs) that contribute to climate change. Coastal sediments are important GHG producers, but the contribution of macrofauna (benthic invertebrates larger than 1 mm) inhabiting them is currently unknown. Through a combination of trace gas, isotope, and molecular analyses, we studied the direct and indirect contribution of two macrofaunal groups, polychaetes and bivalves, to methane and nitrous oxide fluxes from coastal sediments. Our results indicate that macrofauna increases benthic methane efflux by a factor of up to eight, potentially accounting for an estimated 9...
October 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28970843/substrate-specificity-and-inhibitor-sensitivity-of-plant-udp-sugar-producing-pyrophosphorylases
#6
Daniel Decker, Leszek A Kleczkowski
UDP-sugars are essential precursors for glycosylation reactions producing cell wall polysaccharides, sucrose, glycoproteins, glycolipids, etc. Primary mechanisms of UDP sugar formation involve the action of at least three distinct pyrophosphorylases using UTP and sugar-1-P as substrates. Here, substrate specificities of barley and Arabidopsis (two isozymes) UDP-glucose pyrophosphorylases (UGPase), Arabidopsis UDP-sugar pyrophosphorylase (USPase) and Arabidopsis UDP-N-acetyl glucosamine pyrophosphorylase2 (UAGPase2) were investigated using a range of sugar-1-phosphates and nucleoside-triphosphates as substrates...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28941463/inhibition-of-escherichia-coli-inorganic-pyrophosphatase-by-fructose-1-phosphate
#7
N N Vorobyeva, S A Kurilova, V A Anashkin, E V Rodina
Pyrophosphate regulates vital cellular reactions, and its level in E. coli cells is under the ultimate control of inorganic pyrophosphatase. The mechanisms involved in the regulation of pyrophosphatase activity still need to be elucidated. The present study demonstrated that fructose-1-phosphate inhibits pyrophosphatase activity by a mechanism not involving competition with substrate for binding to the active site. The inhibition constant governing the binding of the inhibitor to the enzyme-substrate complex is 1...
August 2017: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/28927841/maternal-provision-of-transformer-2-is-required-for-female-development-and-embryo-viability-in-the-wasp-nasonia-vitripennis
#8
Elzemiek Geuverink, Anna H Rensink, Inge Rondeel, Leo W Beukeboom, Louis van de Zande, Eveline C Verhulst
In insect sex determination a primary signal starts the genetic sex determination cascade that, in most insect orders, is subsequently transduced down the cascade by a transformer (tra) ortholog. Only a female-specifically spliced tra mRNA yields a functional TRA-protein that forms a complex with TRA2, encoded by a transformer-2 (tra2) ortholog, to act as a sex specific splicing regulator of the downstream transcription factors doublesex (dsx) and fruitless (fru). Here, we identify the tra2 ortholog of the haplodiploid parasitoid wasp N...
November 2017: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28853490/interleukin-26-production-in-human-primary-bronchial-epithelial-cells-in-response-to-viral-stimulation-modulation-by-th17-cytokines
#9
Karlhans Fru Che, Riitta Kaarteenaho, Elisa Lappi-Blanco, Bettina Levänen, Jitong Sun, Åsa Wheelock, Lena Palmberg, C Magnus Sköld, Anders Lindén
Interleukin (IL)-26 is abundant in human airways and this cytokine is involved in the local immune response to a bacterial stimulus in vivo. Specifically, local exposure to the toll-like receptor (TLR) 4 agonist endotoxin does increase IL-26 in human airways and this cytokine potentiates chemotactic responses in human neutrophils. In addition to T-helper (Th) 17 cells, alveolar macrophages can produce IL-26, but it remains unknown whether this cytokine can also be produced in the airway mucosa per se in response to a viral stimulus...
August 29, 2017: Molecular Medicine
https://www.readbyqxmd.com/read/28834297/tgf-%C3%AE-1-targets-smad-p38-mapk-and-pi3k-akt-signaling-pathways-to-induce-pfkfb3-gene-expression-and-glycolysis-in-glioblastoma-cells
#10
Ana Rodríguez-García, Paula Samsó, Pere Fontova, Helga Simon-Molas, Anna Manzano, Esther Castaño, Jose Luis Rosa, Ubaldo Martinez-Outshoorn, Francesc Ventura, Àurea Navarro-Sabaté, Ramon Bartrons
In human cancers, transforming growth factor-β1 (TGF-β1) plays a dual role by acting as both a tumor suppressor and a promoter of tumor metastasis. Although TGF-β1 contributes to the metabolic reprogramming of cancer cells and tumor-associated stromal cells, little is known of the molecular mechanisms connecting this cytokine with enhanced glycolysis. PFKFB3 is a homodymeric bifunctional enzyme, belonging to the family of 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatases, that controls the conversion of fructose-6-phosphate (Fru-6-P) to fructose-2,6-bisphosphate (Fru-2,6-P2 )...
October 2017: FEBS Journal
https://www.readbyqxmd.com/read/28821551/coordinated-regulation-of-the-eii-man-and-frurki-operons-of-streptococcus-mutans-by-global-and-fructose-specific-pathways
#11
Lin Zeng, Brinta Chakraborty, Tanaz Farivar, Robert A Burne
The glucose/mannose-phosphotransferase system (PTS) permease EII(Man) encoded by manLMN in the dental caries pathogen Streptococcus mutans has a dominant influence on sugar-specific, CcpA-independent catabolite repression (CR). Mutations in manL affect energy metabolism and virulence-associated traits, including biofilm formation, acid tolerance, and competence. Using promoter::reporter fusions, expression of the manLMN and the fruRKI operons, encoding a transcriptional regulator, a fructose-1-phosphate kinase and a fructose-PTS permease EII(Fru), respectively, was monitored in response to carbohydrate source and in mutants lacking CcpA, FruR, and components of EII(Man) Expression of genes for EII(Man) and EII(Fru) was directly regulated by CcpA and CR, as evinced by in vivo and in vitro methods...
November 1, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28754889/genetic-and-neuronal-mechanisms-governing-the-sex-specific-interaction-between-sleep-and-sexual-behaviors-in-drosophila
#12
Dandan Chen, Divya Sitaraman, Nan Chen, Xin Jin, Caihong Han, Jie Chen, Mengshi Sun, Bruce S Baker, Michael N Nitabach, Yufeng Pan
Animals execute one particular behavior among many others in a context-dependent manner, yet the mechanisms underlying such behavioral choice remain poorly understood. Here we studied how two fundamental behaviors, sex and sleep, interact at genetic and neuronal levels in Drosophila. We show that an increased need for sleep inhibits male sexual behavior by decreasing the activity of the male-specific P1 neurons that coexpress the sex determination genes fru (M) and dsx, but does not affect female sexual behavior...
July 28, 2017: Nature Communications
https://www.readbyqxmd.com/read/28727036/supplementation-of-glycerol-or-fructose-via-drinking-water-to-grazing-lambs-on-tissue-glycogen-level-and-lipogenesis
#13
G Volpi-Lagreca, S K Duckett
Lambs ( = 18; 40.1 ± 7.4 kg BW) were used to assess supplementation of glycerol or fructose via drinking water on growth, tissue glycogen levels, postmortem glycolysis, and lipogenesis. Lambs were blocked by BW and allocated to alfalfa paddocks (2 lambs/paddock and 3 paddocks/treatment). Each paddock within a block was assigned randomly to drinking water treatments for 30 d: 1) control (CON), 2) 120 g fructose/L of drinking water (FRU), or 3) 120 g glycerol/L of drinking water (GLY). Lambs grazed alfalfa with free access to water treatments for 28 d and then were fasted in indoor pens for a final 2 d with access to only water treatments...
June 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28700686/renin-inhibition-improves-metabolic-syndrome-and-reduces-angiotensin-ii-levels-and-oxidative-stress-in-visceral-fat-tissues-in-fructose-fed-rats
#14
Chu-Lin Chou, Heng Lin, Jin-Shuen Chen, Te-Chao Fang
Renin-angiotensin system in visceral fat plays a crucial role in the pathogenesis of metabolic syndrome in fructose-fed rats. However, the effects of renin inhibition on visceral adiposity in metabolic syndrome are not fully investigated. We investigated the effects of renin inhibition on visceral adiposity in fructose-fed rats. Male Wistar-Kyoto rats were divided into 4 groups for 8-week experiments: Group Con (standard chow diet), Group Fru (high-fructose diet; 60% fructose), Group FruA (high-fructose diet and concurrent aliskiren treatment; 100 mg/kg body weight [BW] per day), and Group FruB (high-fructose diet and subsequent, i...
2017: PloS One
https://www.readbyqxmd.com/read/28654829/fructose-intake-exacerbates-the-contractile-response-elicited-by-norepinephrine-in-mesenteric-vascular-bed-of-rats-via-increased-endothelial-prostanoids
#15
Glauciene J Sousa, Phablo Wendell C Oliveira, Breno V Nogueira, Antônio F Melo, Thaís de Oliveira Faria, Eduardo Frizera Meira, José G Mill, Nazaré S Bissoli, Marcelo P Baldo
Chronic fructose intake induces major cardiovascular and metabolic disturbances and is associated with the development of hypertension due to changes in vascular function. We hypothesized that high fructose intake for 6 weeks would cause metabolic syndrome and lead to initial vascular dysfunction. Male Wistar rats were assigned to receive fructose (FRU, 10%) or drinking water (CON) for 6 weeks. Systolic blood pressure was evaluated by tail plethysmography. Fasting glucose, insulin and glucose tolerance were measured at the end of the follow-up...
October 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28642207/arabidopsis-thaliana-sucrose-phosphate-synthase-sps-genes-are-expressed-differentially-in-organs-and-tissues-and-their-transcription-is-regulated-by-osmotic-stress
#16
María Gloria Solís-Guzmán, Gerardo Argüello-Astorga, José López-Bucio, León Francisco Ruiz-Herrera, Joel Edmundo López-Meza, Lenin Sánchez-Calderón, Yazmín Carreón-Abud, Miguel Martínez-Trujillo
Sucrose is synthesized from UDP-Glc and Fru-6-phosphate via the activity of sucrose-phosphate synthase (SPS) enzymes, which produce Suc-6-phosphate. Suc-6-phosphate is rapidly dephosphorylated by phosphatases to produce Suc and inorganic phosphate. Arabidopsis has four sps genes encoding SPS enzymes. Of these enzymes, AtSPS1F and AtSPS2F have been grouped with other dicotyledonous SPS enzymes, while AtSPS3F and AtSPS4F are included in groups with both dicotyledonous and monocotyledonous SPS enzymes. In this work, we generated Arabidopsis thaliana transformants containing the promoter region of each sps gene fused to gfp::uidA reporter genes...
November 2017: Gene Expression Patterns: GEP
https://www.readbyqxmd.com/read/28593059/fulminating-postcaesarean-necrotising-fasciitis-a-rare-and-lethal-condition-successfully-managed-in-a-resource-disadvantaged-setting-in-sub-saharan-africa
#17
Carlson-Babila Sama, Conrad S Tankou, Fru F Angwafo Iii
Necrotising fasciitis is a rare but potentially lethal condition in obstetrics which usually presents with fulminant tissue destruction and a resultant high mortality. We report a 19-year-old Sub-Saharan female diagnosed with a rapidly erosive necrotising fasciitis on day 5 after caesarean section in a resource-limited setting. Timely diagnosis, aggressive antibiotic therapy, and prompt surgical intervention via an extensive abdominal wall debridement were pivotal to her survival.
2017: Case Reports in Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28528483/fossil-record-of-ephedra-in-the-lower-cretaceous-aptian-argentina
#18
Gabriela G Puebla, Ari Iglesias, María A Gómez, Mercedes B Prámparo
Fossil plants from the Lower Cretaceous (upper Aptian) of the La Cantera Formation, Argentina, are described. The fossils studied represent a leafy shooting system with several orders of articulated and striated axes and attached leaves with unequivocal ephedroid affinity. We also found associated remains of ovulate cones with four whorls of sterile bracts, which contain two female reproductive units (FRU). Ovulate cone characters fit well within the genus Ephedra. Special characters in the ovulate cones including an outer seed envelope with two types of trichomes, allowed us to consider our remains as a new Ephedra species...
November 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28510528/identification-of-octopaminergic-neurons-that-modulate-sleep-suppression-by-male-sex-drive
#19
Daniel R Machado, Dinis Js Afonso, Alexandra R Kenny, Arzu Öztu Rk-Çolak, Emilia H Moscato, Benjamin Mainwaring, Matthew Kayser, Kyunghee Koh
Molecular and circuit mechanisms for balancing competing drives are not well understood. While circadian and homeostatic mechanisms generally ensure sufficient sleep at night, other pressing needs can overcome sleep drive. Here, we demonstrate that the balance between sleep and sex drives determines whether male flies sleep or court, and identify a subset of octopaminergic neurons (MS1) that regulate sleep specifically in males. When MS1 neurons are activated, isolated males sleep less, and when MS1 neurons are silenced, the normal male sleep suppression in female presence is attenuated and mating behavior is impaired...
May 16, 2017: ELife
https://www.readbyqxmd.com/read/28510275/single-cell-transcriptome-profiling-of-developing-chick-retinal-cells
#20
Lauren A Laboissonniere, Gregory M Martin, Jillian J Goetz, Ran Bi, Brock Pope, Kallie Weinand, Laura Ellson, Diane Fru, Miranda Lee, Andrea K Wester, Peng Liu, Jeffrey M Trimarchi
The vertebrate retina is a specialized photosensitive tissue comprised of six neuronal and one glial cell types, each of which develops in prescribed proportions at overlapping timepoints from a common progenitor pool. While each of these cells has a specific function contributing to proper vision in the mature animal, their differential representation in the retina as well as the presence of distinctive cellular subtypes makes identifying the transcriptomic signatures that lead to each retinal cell's fate determination and development challenging...
May 16, 2017: Journal of Comparative Neurology
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