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https://www.readbyqxmd.com/read/27936512/genome-editing-of-the-disease-susceptibility-gene-cslob1-in-citrus-confers-resistance-to-citrus-canker
#1
Hongge Jia, Yunzen Zhang, Vladimir Orbovic, Jin Xu, Frank White, Jeffrey Jones, Nian Wang
Citrus is a highly valued tree crop worldwide, while, at the same time, citrus production faces many biotic challenges, including bacterial canker and Huanglongbing (HLB). Breeding for disease resistant varieties is the most efficient and sustainable approach to control plant diseases. Traditional breeding of citrus varieties is challenging due to multiple limitations, including polyploidy, polyembryony, extended juvenility, and long crossing cycles. Targeted genome editing technology has the potential to shorten varietal development for some traits, including disease resistance...
December 9, 2016: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/27936398/microrna138-regulates-keratin-17-protein-expression-to-affect-hacat-cell-proliferation-and-apoptosis-by-targeting-htert-in-psoriasis-vulgaris
#2
Shi-Jun Feng, Rui-Qi Chu, Jing Ma, Zheng-Xiang Wang, Guang-Jing Zhang, Xiu-Fang Yang, Zhi Song, Yun-Yi Ma
The purpose of this study is to explore the how microRNA-138 (miR-138) affects the expression of keratin 17 (K17) and psoriasis development. Twenty-eight skin lesions from patients with psoriasis vulgaris and twenty-four normal skin tissues from healthy controls were collected. The HaCaT cells were assigned into blank, negative control (NC), miR-138 mimic, miR-138 inhibitor, hTERT siRNA and miR-138 inhibitor+hTERT siRNA groups. Quantitative real-time polymerase chain reaction (qRT-PCR) was performed to detect the miR-138 expression...
December 6, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27936347/the-infectious-intracellular-lifestyle-of-salmonella-enterica-relies-on-the-adaptation-to-nutritional-conditions-within-the-salmonella-containing-vacuole
#3
Lautaro Diacovich, Lucía Lorenzi, Mauro Tomassetti, Stéphane Méresse, Hugo Gramajo
Salmonella enterica serovar Typhimurium (S. Typhimurium) is a Gram-negative pathogen that causes various host-specific diseases. During their life cycle, Salmonellae survive frequent exposures to a variety of environmental stresses, e.g. carbon-source starvation. The virulence of this pathogen relies on its ability to establish a replicative niche, named Salmonella-containing vacuole, inside host cells. However, the microenvironment of the SCV and the bacterial metabolic pathways required during infection are largely undefined...
December 9, 2016: Virulence
https://www.readbyqxmd.com/read/27936329/chemomechanical-coupling-in-hexameric-protein-protein-interfaces-harness-energy-within-v-type-atpases
#4
Abhishek Singharoy, Christophe Chipot, Mahmoud Moradi, Klaus Schulten
ATP synthase is the most prominent bioenergetic macromolecular motor in all life-forms, utilizing the proton gradient across the cell membrane to fuel the synthesis of ATP. Notwithstanding the wealth of available biochemical and structural information inferred from years of experiments, the precise molecular mechanism whereby vacuolar (V-type) ATP synthase fulfills its biological function remains largely fragmentary. Recently, crystallographers provided the first high-resolution view of ATP activity in Enterococcus hirae V1-ATPase...
December 9, 2016: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/27936306/hybrid-polymer-garnet-electrolyte-with-a-small-interfacial-resistance-for-lithium-ion-batteries
#5
Yutao Li, Biyi Xu, Henghui Xu, Huanan Duan, Xujie Lü, Sen Xin, Weidong Zhou, Leigang Xue, Gengtao Fu, Arumugam Manthiram, John B Goodenough
Li7 La3 Zr2 O12 -based Li-rich garnets react with water and carbon dioxide in air to form a Li-ion insulating Li2 CO3 layer on the surface of the garnet particles, which results in a large interfacial resistance for Li-ion transfer. Here, we introduce LiF to garnet Li6.5 La3 Zr1.5 Ta0.5 O12 (LLZT) to increase the stability of the garnet electrolyte against moist air; the garnet LLZT-2 wt % LiF (LLZT-2LiF) has less Li2 CO3 on the surface and shows a small interfacial resistance with Li metal, a solid polymer electrolyte, and organic-liquid electrolytes...
December 9, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27936150/oxidative-stress-induces-mouse-follicular-granulosa-cells-apoptosis-via-jnk-foxo1-pathway
#6
Qiannan Weng, Zequn Liu, Bojiang Li, Kaiqing Liu, Wangjun Wu, Honglin Liu
The c-Jun N-terminal protein kinase (JNK) plays an important role in the regulation of cell apoptosis. Forkhead box O (FoxO) transcription factors are involved in diverse biological processes, including cellular metabolism, cell apoptosis, and cell cycle. However, the JNK/FoxO1 pathway involved in the process of apoptosis induced by oxidative stress remains to be elucidated. Here, we demonstrated that the JNK activity significantly increased in response to oxidative stress in mouse follicular granulosa cells (MGCs)...
2016: PloS One
https://www.readbyqxmd.com/read/27936127/interactions-between-thermal-acclimation-growth-rate-and-phylogeny-influence-prochlorococcus-elemental-stoichiometry
#7
Adam C Martiny, Lanying Ma, Céline Mouginot, Jeremy W Chandler, Erik R Zinser
Variability in plankton elemental requirements can be important for global ocean biogeochemistry but we currently have a limited understanding of how ocean temperature influences the plankton C/N/P ratio. Multiple studies have put forward a 'translation-compensation' hypothesis to describe the positive relationship between temperature and plankton N/P or C/P as cells should have lower demand for P-rich ribosomes and associated depressed QP when growing at higher temperature. However, temperature affects many cellular processes beyond translation with unknown outcomes on cellular elemental composition...
2016: PloS One
https://www.readbyqxmd.com/read/27936104/mechanical-loading-attenuates-radiation-induced-bone-loss-in-bone-marrow-transplanted-mice
#8
Peter M Govey, Yue Zhang, Henry J Donahue
Exposure of bone to ionizing radiation, as occurs during radiotherapy for some localized malignancies and blood or bone marrow cancers, as well as during space travel, incites dose-dependent bone morbidity and increased fracture risk. Rapid trabecular and endosteal bone loss reflects acutely increased osteoclastic resorption as well as decreased bone formation due to depletion of osteoprogenitors. Because of this dysregulation of bone turnover, bone's capacity to respond to a mechanical loading stimulus in the aftermath of irradiation is unknown...
2016: PloS One
https://www.readbyqxmd.com/read/27936052/microrna-182-suppresses-hgf-sf-induced-increases-in-retinal-pigment-epithelial-cell-proliferation-and-migration-through-targeting-c-met
#9
Lihua Wang, Feng Dong, Peter S Reinach, Dandan He, Xiaoting Zhao, Xiaoyan Chen, Dan-Ning Hu, Dongsheng Yan
As increases in hepatocyte growth factor/scatter factor (HGF/SF) induce retinal pigment epithelial (RPE) migration and proliferation into the vitreous cavity and contribute to proliferative vitreoretinopathy (PVR) development, we determined if changes in miR-182 expression affect such behavioral changes. We found that miR-182 expression was less in PVR clinical samples than in primary RPE cells whereas c-Met was upregulated. Ectopic miR-182 inhibited RPE cell proliferation, cell cycle, and migration. Bioinformatic analysis identified c-Met as a miR-182 target, which was confirmed with the luciferase reporter assay...
2016: PloS One
https://www.readbyqxmd.com/read/27936037/the-antioxidative-fraction-of-white-mulberry-induces-apoptosis-through-regulation-of-p53-and-nf%C3%AE%C2%BAb-in-eac-cells
#10
Ahm Khurshid Alam, Asm Sakhawat Hossain, Muhammad Ali Khan, Syed Rashel Kabir, Md Abu Reza, Md Mahbubur Rahman, Mohammad Saiful Islam, Md Aziz Abdur Rahman, Mamunur Rashid, Md Golam Sadik
In this study, the antioxidative fraction of white mulberry (Morus alba) was found to have an apotogenic effect on Ehrlich's ascites carcinoma cell-induced mice (EAC mice) that correlate with upregulated p53 and downregulated NFκB signaling. The antioxidant activities and polyphenolic contents of various mulberry fractions were evaluated by spectrophotometry and the ethyl acetate fraction (EAF) was selected for further analysis. Strikingly, the EAF caused 70.20% tumor growth inhibition with S-phase cell cycle arrest, normalized blood parameters including red/white blood cell counts and suppressed the tumor weight of EAC mice compared with untreated controls...
2016: PloS One
https://www.readbyqxmd.com/read/27935965/bypass-of-candida-albicans-filamentation-biofilm-regulators-through-diminished-expression-of-protein-kinase-cak1
#11
Carol A Woolford, Katherine Lagree, Wenjie Xu, Tatyana Aleynikov, Hema Adhikari, Hiram Sanchez, Paul J Cullen, Frederick Lanni, David R Andes, Aaron P Mitchell
Biofilm formation on implanted medical devices is a major source of lethal invasive infection by Candida albicans. Filamentous growth of this fungus is tied to biofilm formation because many filamentation-associated genes are required for surface adherence. Cell cycle or cell growth defects can induce filamentation, but we have limited information about the coupling between filamentation and filamentation-associated gene expression after cell cycle/cell growth inhibition. Here we identified the CDK activating protein kinase Cak1 as a determinant of filamentation and filamentation-associated gene expression through a screen of mutations that diminish expression of protein kinase-related genes implicated in cell cycle/cell growth control...
December 2016: PLoS Genetics
https://www.readbyqxmd.com/read/27935957/intracellular-zn-ii-intoxication-leads-to-dysregulation-of-the-perr-regulon-resulting-in-heme-toxicity-in-bacillus-subtilis
#12
Pete Chandrangsu, John D Helmann
Transition metal ions (Zn(II), Cu(II)/(I), Fe(III)/(II), Mn(II)) are essential for life and participate in a wide range of biological functions. Cellular Zn(II) levels must be high enough to ensure that it can perform its essential roles. Yet, since Zn(II) binds to ligands with high avidity, excess Zn(II) can lead to protein mismetallation. The major targets of mismetallation, and the underlying causes of Zn(II) intoxication, are not well understood. Here, we use a forward genetic selection to identify targets of Zn(II) toxicity...
December 9, 2016: PLoS Genetics
https://www.readbyqxmd.com/read/27935947/a-stochastic-model-of-the-yeast-cell-cycle-reveals-roles-for-feedback-regulation-in-limiting-cellular-variability
#13
Debashis Barik, David A Ball, Jean Peccoud, John J Tyson
The cell division cycle of eukaryotes is governed by a complex network of cyclin-dependent protein kinases (CDKs) and auxiliary proteins that govern CDK activities. The control system must function reliably in the context of molecular noise that is inevitable in tiny yeast cells, because mistakes in sequencing cell cycle events are detrimental or fatal to the cell or its progeny. To assess the effects of noise on cell cycle progression requires not only extensive, quantitative, experimental measurements of cellular heterogeneity but also comprehensive, accurate, mathematical models of stochastic fluctuations in the CDK control system...
December 2016: PLoS Computational Biology
https://www.readbyqxmd.com/read/27935867/the-bromodomain-inhibitor-otx015-mk-8628-exerts-anti-tumor-activity-in-triple-negative-breast-cancer-models-as-single-agent-and-in-combination-with-everolimus
#14
Ramiro Vázquez, María E Riveiro, Lucile Astorgues-Xerri, Elodie Odore, Keyvan Rezai, Eugenio Erba, Nicolò Panini, Andrea Rinaldi, Ivo Kwee, Luca Beltrame, Mohamed Bekradda, Esteban Cvitkovic, Francesco Bertoni, Roberta Frapolli, Maurizio D'Incalci
Triple-negative breast cancer (TNBC) is an aggressive and heterogeneous subgroup of breast tumors clinically defined by the lack of estrogen, progesterone and HER2 receptors, limiting the use of the targeted therapies employed in other breast malignancies. Recent evidence indicates that c-MYC is a key driver of TNBC. The BET-bromodomain inhibitor OTX015 (MK-8628) has potent antiproliferative activity accompanied by c-MYC down-regulation in several tumor types, and has demonstrated synergism with the mTOR inhibitor everolimus in different models...
December 7, 2016: Oncotarget
https://www.readbyqxmd.com/read/27935866/hic1-hypermethylated-in-cancer-1-sumoylation-is-dispensable-for-dna-repair-but-is-essential-for-the-apoptotic-dna-damage-response-ddr-to-irreparable-dna-double-strand-breaks-dsbs
#15
Sonia Paget, Marion Dubuissez, Vanessa Dehennaut, Joe Nassour, Brennan T Harmon, Nathalie Spruyt, Ingrid Loison, Corinne Abbadie, Brian R Rood, Dominique Leprince
The tumor suppressor gene HIC1 (Hypermethylated In Cancer 1) encodes a transcriptional repressor mediating the p53-dependent apoptotic response to irreparable DNA double-strand breaks (DSBs) through direct transcriptional repression of SIRT1. HIC1 is also essential for DSB repair as silencing of endogenous HIC1 in BJ-hTERT fibroblasts significantly delays DNA repair in functional Comet assays. HIC1 SUMOylation favours its interaction with MTA1, a component of NuRD complexes. In contrast with irreparable DSBs induced by 16-hours of etoposide treatment, we show that repairable DSBs induced by 1 h etoposide treatment do not increase HIC1 SUMOylation or its interaction with MTA1...
December 7, 2016: Oncotarget
https://www.readbyqxmd.com/read/27935818/prenatal-ethanol-exposure-phenocopies-cdon-mutation-by-impeding-shh-function-in-the-etiology-of-optic-nerve-hypoplasia
#16
Benjamin M Kahn, Tanya S Corman, Korah Lovelace, Mingi Hong, Robert S Krauss, Douglas J Epstein
Septo-optic dysplasia (SOD) is a congenital disorder characterized by optic nerve, pituitary and midline brain malformations. The clinical presentation of SOD is highly variable with a poorly understood etiology. The majority of SOD cases are sporadic, but in rare instances inherited mutations have been identified in a small number of transcription factors, some of which regulate the expression of Sonic hedgehog (Shh) during mouse forebrain development. SOD is also associated with young maternal age suggesting that environmental factors, including alcohol consumption at early stages of pregnancy, may increase the risk of developing this condition...
November 24, 2016: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/27935586/use-of-plankton-derived-vitamin-b1-precursors-especially-thiazole-related-precursor-by-key-marine-picoeukaryotic-phytoplankton
#17
Ryan W Paerl, Francois-Yves Bouget, Jean-Claude Lozano, Valérie Vergé, Philippe Schatt, Eric E Allen, Brian Palenik, Farooq Azam
Several cosmopolitan marine picoeukaryotic phytoplankton are B1 auxotrophs requiring exogenous vitamin B1 or precursor to survive. From genomic evidence, representatives of picoeukaryotic phytoplankton (Ostreococcus and Micromonas spp.) were predicted to use known thiazole and pyrimidine B1 precursors to meet their B1 demands, however, recent culture-based experiments could not confirm this assumption. We hypothesized these phytoplankton strains could grow on precursors alone, but required a thiazole-related precursor other the well-known and extensively tested 4-methyl-5-thiazoleethanol...
December 9, 2016: ISME Journal
https://www.readbyqxmd.com/read/27935559/application-of-a-model-to-analyze-shoulder-biomechanics-in-adult-patients-with-spinal-cord-injury-when-walking-with-crutches-in-two-different-gait-patterns
#18
Enrique Perez-Rizo, Fernando Trincado-Alonso, Soraya Pérez-Nombela, Antonio Del Ama-Espinosa, Fernando Jiménez-Díaz, Vicente Lozano-Berrio, Angel Gil-Agudo
BACKGROUND: Specific biomechanical models have been developed to study gait using crutches. Clinical application of these models is needed in adult spinal cord injury (SCI) population walking with different patterns of gait with crutches to prevent overuse shoulder injuries. OBJECTIVE: To apply a biomechanical model in a clinical environment to analyze shoulder in adult SCI patients walking with two different patterns of gait with crutches: two point reciprocal gait (RG) and swing-through gait (SG)...
December 8, 2016: NeuroRehabilitation
https://www.readbyqxmd.com/read/27935477/regulation-of-b-cell-fate-by-chronic-activity-of-the-ige-b-cell-receptor
#19
Zhiyong Yang, Marcus J Robinson, Xiangjun Chen, Geoffrey Alexander Smith, Jack Taunton, Wanli Liu, Christopher Dc Allen
IgE can trigger potent allergic responses, yet the mechanisms regulating IgE production are poorly understood. Here we reveal that IgE(+) B cells are constrained by chronic activity of the IgE B cell receptor (BCR). In the absence of cognate antigen, the IgE BCR promoted terminal differentiation of B cells into plasma cells (PCs) under cell culture conditions mimicking T cell help. This antigen-independent PC differentiation involved multiple IgE domains and Syk, CD19, BLNK, Btk, and IRF4. Disruption of BCR signaling in mice led to consistently exaggerated IgE(+) germinal center (GC) B cell but variably increased PC responses...
December 9, 2016: ELife
https://www.readbyqxmd.com/read/27935243/mocdc14-is-important-for-septation-during-conidiation-and-appressorium-formation-in-magnaporthe-oryzae
#20
Chaohui Li, Shulin Cao, Chengkang Zhang, Yonghui Zhang, Qiang Zhang, Jin-Rong Xu, Chenfang Wang
As a typical foliar pathogen, appressorium formation and penetration are critical steps in the infection cycle of Magnaporthe oryzae. Because appressorium formation and penetration are closely co-regulated with cell cycle and Cdc14 phosphatases have antagonistic relationship with CDKs on proteins related to mitotic exits and cytokinesis, in this study we functionally characterized the MoCDC14 gene in M. oryzae. The Mocdc14 deletion mutant was significantly reduced in growth rate and conidiation. It also was defective in septum formation and nuclear distribution...
December 9, 2016: Molecular Plant Pathology
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