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https://www.readbyqxmd.com/read/28822946/differential-expression-of-vacuolar-and-defective-cell-wall-invertase-genes-in-roots-and-seeds-of-metalliferous-and-non-metalliferous-populations-of-rumex-dentatus-under-copper-stress
#1
Zhong-Rui Xu, Shen-Wen Cai, Wu-Xing Huang, Rong-Xiang Liu, Zhi-Ting Xiong
Acid invertase activities in roots and young seeds of a metalliferous population (MP) of Rumex dentatus were previously observed to be significantly higher than those of a non-metalliferous population (NMP) under Cu stress. To date, no acid invertase gene has been cloned from R. dentatus. Here, we isolated four full-length cDNAs from the two populations of R. dentatus, presumably encoding cell wall (RdnCIN1 and RdmCIN1 from the NMP and MP, respectively) and vacuolar invertases (RdnVIN1 and RdmVIN1 from the NMP and MP, respectively)...
August 17, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28822857/exploring-associations-of-clinical-and-social-parameters-with-violent-behaviors-among-psychiatric-patients
#2
Hong-Jie Dai, Emily Chia-Yu Su, Mohy Uddin, Jitendra Jonnagaddala, Chi-Shin Wu, Shabbir Syed-Abdul
Evidence has revealed interesting associations of clinical and social parameters with violent behaviors of patients with psychiatric disorders. Men are more violent preceding and during hospitalization, whereas women are more violent than men throughout the 3 days following a hospital admission. It has also been proven that mental disorders may be a consistent risk factor for the occurrence of violence. In order to better understand violent behaviors of patients with psychiatric disorders, it is important to investigate both the clinical symptoms and psychosocial factors that accompany violence in these patients...
August 16, 2017: Journal of Biomedical Informatics
https://www.readbyqxmd.com/read/28822581/favorable-residual-stress-induction-by-resin-cementation-on-dental-porcelain
#3
Garry J P Fleming, Xu Cao, Dan L Romanyk, Owen Addison
OBJECTIVES: Despite developments in polycrystalline ceramics, glassy dental-ceramic materials provide the optimum cosmetic option in most clinical situations to mimic the natural dentition. The clinical success of glassy dental-ceramic materials is often attributed to resin-adhesive bonding techniques. In this study we explore whether shrinkage stresses generated on photo-polymerisation of the resin-cement are sufficient to induce ceramic surface defect stabilization, and we quantify the transient nature of the induced stresses...
August 16, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28822530/application-of-exercise-ecg-stress-test-in-the-current-high-cost-modern-era-healthcare-system
#4
REVIEW
Gaurang Nandkishor Vaidya
Exercise electrocardiogram (ECG) tests boasts of being more widely available, less resource intensive, lower cost and absence of radiation. In the presence of a normal baseline ECG, an exercise ECG test is able to generate a reliable and reproducible result almost comparable to Technitium-99m sestamibi perfusion imaging. Exercise ECG changes when combined with other clinical parameters obtained during the test has the potential to allow effective redistribution of scarce resources by excluding low risk patients with significant accuracy...
July 2017: Indian Heart Journal
https://www.readbyqxmd.com/read/28822492/rapid-adaptation-of-invertebrate-pests-to-climatic-stress
#5
REVIEW
Ary A Hoffmann
There is surprisingly little information on adaptive responses of pests and disease vectors to climatic stresses even though the short generation times and large population sizes associated with pests make rapid adaptation likely. Most evidence of adaptive differentiation has been obtained from geographic comparisons and these can directly or indirectly indicate rates of adaptation where historical data on invasions are available. There is very little information on adaptive shifts in pests detected through molecular comparisons even though the genomes of many pests are now available and can help to identify markers underlying adaptation...
June 2017: Current Opinion in Insect Science
https://www.readbyqxmd.com/read/28822073/isorhynchophylline-attenuates-mpp-induced-apoptosis-through-endoplasmic-reticulum-stress-and-mitochondria-dependent-pathways-in-pc12-cells-involvement-of-antioxidant-activity
#6
Xiao-Ming Li, Xiao-Jie Zhang, Miao-Xian Dong
Endoplasmic reticulum stress (ERS) and mitochondrial dysfunctions are thought to be involved in the dopaminergic neuronal death in Parkinson's disease (PD). In this study, we found that isorhynchophylline (IRN) significantly attenuated 1-methyl-4-phenylpyridinium (MPP(+))-induced apoptotic cell death and oxidative stress in PC12 cells. IRN markedly reduced MPP(+)-induced-ERS responses, indicative of inositol-requiring enzyme 1 (IRE1) phosphorylation and caspase-12 activation. Furthermore, IRN inhibits MPP(+)-triggered apoptosis signal-regulating kinase 1 (ASK1)/c-Jun N-terminal Kinase (JNK) signaling-mediated mitochondria-dependent apoptosis pathway...
August 18, 2017: Neuromolecular Medicine
https://www.readbyqxmd.com/read/28821952/genome-wide-association-study-and-gene-set-analysis-for-understanding-candidate-genes-involved-in-salt-tolerance-at-the-rice-seedling-stage
#7
Jie Yu, Weiguo Zao, Qiang He, Tae-Sung Kim, Yong-Jin Park
Salt is the major factor limiting crop productivity in saline soils and is controlled by various genes. The development of salt-tolerant rice through molecular breeding methods is important to meet the needs of rice breeding. We used 295 accessions to perform a genome-wide association study (GWAS) of salt tolerance-related phenotypes in rice at the seedling stage and obtained 93 candidate genes with high association peaks across six phenotypes. We constructed a protein interaction network using the candidate genes identified here, and 33 genes were associated...
August 18, 2017: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/28821885/the-expression-profiles-of-mirna-mrna-of-early-response-in-genetically-improved-farmed-tilapia-oreochromis-niloticus-liver-by-acute-heat-stress
#8
Jun Qiang, Wen J Bao, Fan Y Tao, Jie He, Xia H Li, Pao Xu, Lan Y Sun
Genetically improved farmed tilapia (GIFT, Oreochromis niloticus) are commercially important fish that are cultured in China. GIFT are highly susceptible to diseases when exposed to high temperatures in summer. Better understanding the GIFT regulatory response to heat stress will not only help in determining the relationship between heat stress signalling pathways and adaption mechanisms, but will also contribute to breeding new high-temperature tolerant strains of GIFT. In this study, we built control (28 °C) and heat-treated (37...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821725/interplay-between-maternal-slc6a4-mutation-and-prenatal-stress-a-possible-mechanism-for-autistic-behavior-development
#9
Calvin P Sjaarda, Patrick Hecht, Amy J M McNaughton, Audrina Zhou, Melissa L Hudson, Matt J Will, Garth Smith, Muhammad Ayub, Ping Liang, Nansheng Chen, David Beversdorf, Xudong Liu
The low activity allele of the maternal polymorphism, 5HTTLPR, in the serotonin transporter, SLC6A4, coupled with prenatal stress is reported to increase the risk for children to develop autism spectrum disorder (ASD). Similarly, maternal Slc6a4 knock-out and prenatal stress in rodents results in offspring demonstrating ASD-like characteristics. The present study uses an integrative genomics approach to explore mechanistic changes in early brain development in mouse embryos exposed to this maternal gene-environment phenomenon...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821607/two-plant-derived-aporphinoid-alkaloids-exert-their-antifungal-activity-by-disrupting-mitochondrial-iron-sulfur-cluster-biosynthesis
#10
Siddharth K Tripathi, Tao Xu, Qin Feng, Bharathi Avula, Xiaomin Shi, Xuewen Pan, Melanie M Mask, Scott R Baerson, Melissa R Jacob, Ranga Rao Ravu, Shabana I Khan, Xing-Cong Li, Ikhlas A Khan, Alice M Clark, Ameeta K Agarwal
Eupolauridine and liriodenine are plant-derived aporphinoid alkaloids that exhibit potent inhibitory activity against the opportunistic fungal pathogens Candida albicans and Cryptococcus neoformans However, the molecular mechanism of this antifungal activity is unknown. In this study, we show that eupolauridine 9591 (E9591), a synthetic analog of eupolauridine, and liriodenine methiodide (LMT), a methiodide salt of liriodenine, mediate their antifungal activities by disrupting mitochondrial iron-sulfur (Fe-S) cluster synthesis...
August 18, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28821455/rnase-hii-saves-rnha-mutant-escherichia-coli-from-r-loop-associated-chromosomal-fragmentation
#11
Elena A Kouzminova, Farid F Kadyrov, Andrei Kuzminov
The rnhAB mutant E. coli, deficient in two RNase H enzymes that remove both R-loops and incorporated ribonucleotides (rNs) from DNA, grow slowly, suggesting accumulation of rN-containing DNA lesions (R-lesions). We report that the rnhAB mutants have reduced viability, form filaments with abnormal nucleoids, induce SOS and fragment their chromosome, revealing replication and/or segregation stress. R-loops are known to interfere with replication forks, and sensitivity of the double rnhAB mutants to translation inhibition points to R-loops as precursors for R-lesions...
August 15, 2017: Journal of Molecular Biology
https://www.readbyqxmd.com/read/28820892/maternal-autoimmune-antibodies-alter-the-dendritic-arbor-and-spine-numbers-in-the-infragranular-layers-of-the-cortex
#12
Jeanelle Ariza, Jesus Hurtado, Haille Rogers, Raymond Ikeda, Michael Dill, Craig Steward, Donnay Creary, Judy Van de Water, Verónica Martínez-Cerdeño
An association between maternal IgG antibodies reactive against proteins in fetal brain and an outcome of autism in the child has been identified. Using a mouse model of prenatal intraventricular administration of autism-specific maternal IgG, we demonstrated that these antibodies produce behavioral alterations similar to those in children with ASD. We previously demonstrated that these antibodies bind to radial glial stem cells (RG) and observed an increase in the number of divisions of translocating RG in the developing cortex...
2017: PloS One
https://www.readbyqxmd.com/read/28820290/local-histone-acetylation-by-acss2-promotes-gene-transcription-for-lysosomal-biogenesis-and-autophagy
#13
Xinjian Li, Xu Qian, Zhimin Lu
Overcoming metabolic stress is a critical step in tumorigenesis. Acetyl coenzyme A (acetyl-CoA) converted from glucose or acetate is a substrate used for histone acetylation to regulate gene expression. However, how acetyl-CoA is produced under nutritional stress conditions is unclear. Herein we report that nutritional stress induces nuclear translocation of ACSS2 (acyl-CoA synthetase short-chain family member 2). This translocation is mediated by AMP-activated protein kinase (AMPK)-dependent ACSS2 Ser659 phosphorylation and subsequent exposure of the nuclear localization signal of ACSS2 to KPNA1/importin α5 for binding...
August 18, 2017: Autophagy
https://www.readbyqxmd.com/read/28819546/oxidative-stress-harms-and-benefits-for-human-health
#14
REVIEW
Gabriele Pizzino, Natasha Irrera, Mariapaola Cucinotta, Giovanni Pallio, Federica Mannino, Vincenzo Arcoraci, Francesco Squadrito, Domenica Altavilla, Alessandra Bitto
Oxidative stress is a phenomenon caused by an imbalance between production and accumulation of oxygen reactive species (ROS) in cells and tissues and the ability of a biological system to detoxify these reactive products. ROS can play, and in fact they do it, several physiological roles (i.e., cell signaling), and they are normally generated as by-products of oxygen metabolism; despite this, environmental stressors (i.e., UV, ionizing radiations, pollutants, and heavy metals) and xenobiotics (i.e., antiblastic drugs) contribute to greatly increase ROS production, therefore causing the imbalance that leads to cell and tissue damage (oxidative stress)...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28819397/iron-chelators-and-exogenic-photosensitizers-synergy-through-oxidative-stress-gene-expression
#15
Anna Mrozek-Wilczkiewicz, Katarzyna Malarz, Marzena Rams-Baron, Maciej Serda, Daniela Bauer, Franz-Peter Montforts, Alicja Ratuszna, Thomas Burley, Jaroslaw Polanski, Robert Musiol
In non-invasive anticancer photodynamic therapy (PDT), a nontoxic photosensitizer (PS), which is activated by visible light, is used as a magic bullet that selectively destroys cancer cells. Recently, we described the combined therapy of 5-aminolevulinic acid (ALA-PDT) with thiosemicarbazone (TSC), i.e. an iron-chelating agent. This resulted in a strong synergistic effect. Herein, we investigated a novel strategy using a combination of PDT consist of the xenobiotic-porphyrin type PS with TSC. We observed a synergistic effect for all of the pairs of TSC-PS...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28819155/context-conditioning-in-humans-using-commercially-available-immersive-virtual-reality
#16
Marijn C W Kroes, Joseph E Dunsmoor, Wayne E Mackey, Mason McClay, Elizabeth A Phelps
Despite a wealth of knowledge on how humans and nonhuman animals learn to associate meaningful events with cues in the environment, far less is known about how humans learn to associate these events with the environment itself. Progress on understanding spatiotemporal contextual processes in humans has been slow in large measure by the methodological constraint of generating and manipulating immersive spatial environments in well-controlled laboratory settings. Fortunately, immersive Virtual Reality (iVR) technology has improved appreciably and affords a relatively straightforward methodology to investigate the role of context on learning, memory, and emotion while maintaining experimental control...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819151/the-investigation-of-stress-in-freestanding-gan-crystals-grown-from-si-substrates-by-hvpe
#17
Moonsang Lee, Dmitry Mikulik, Mino Yang, Sungsoo Park
We investigate the stress evolution of 400 µm-thick freestanding GaN crystals grown from Si substrates by hydride vapour phase epitaxy (HVPE) and the in situ removal of Si substrates. The stress generated in growing GaN can be tuned by varying the thickness of the MOCVD AlGaN/AlN buffer layers. Micro Raman analysis shows the presence of slight tensile stress in the freestanding GaN crystals and no stress accumulation in HVPE GaN layers during the growth. Additionally, it is demonstrated that the residual tensile stress in HVPE GaN is caused only by elastic stress arising from the crystal quality difference between Ga- and N-face GaN...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28818793/cellular-adaptation-to-xenobiotics-interplay-between-xenosensors-reactive-oxygen-species-and-foxo-transcription-factors
#18
Lars-Oliver Klotz, Holger Steinbrenner
Cells adapt to an exposure to xenobiotics by upregulating the biosynthesis of proteins involved in xenobiotic metabolism. This is achieved largely via activation of cellular xenosensors that modulate gene expression. Biotransformation of xenobiotics frequently comes with the generation of reactive oxygen species (ROS). ROS, in turn, are known modulators of signal transduction processes. FOXO (forkhead box, class O) transcription factors are among the proteins deeply involved in the cellular response to stress, including oxidative stress elicited by the formation of ROS...
August 3, 2017: Redox Biology
https://www.readbyqxmd.com/read/28818044/effects-of-the-vertically-transmitted-microsporidian-facilispora-margolisi-and-the-parasiticide-emamectin-benzoate-on-salmon-lice-lepeophtheirus-salmonis
#19
Jordan D Poley, Ben J G Sutherland, Mark D Fast, Ben F Koop, Simon R M Jones
BACKGROUND: Microsporidia are highly specialized, parasitic fungi that infect a wide range of eukaryotic hosts from all major taxa. Infections cause a variety of damaging effects on host physiology from increased stress to death. The microsporidian Facilispora margolisi infects the Pacific salmon louse (Lepeophtheirus salmonis oncorhynchi), an economically and ecologically important ectoparasitic copepod that can impact wild and cultured salmonids. RESULTS: Vertical transmission of F...
August 17, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28817994/maternal-serum-and-fetal-cord-blood-ischemia-modified-albumin-concentrations-in-normal-pregnancy-and-preeclampsia-a-systematic-review-and-meta-analysis
#20
Varikasuvu Seshadri Reddy, Pragathi Duggina, Mrudula Vedhantam, Munikumar Manne, Neelakant Varma, Nagaram Srinivas
BACKGROUND/AIMS: A meta-analysis of maternal serum ischemia-modified albumin (IMA) and fetal cord blood IMA concentrations in normal pregnancy (NP) compared to nonpregnant healthy controls (HC) and in preeclampsia (PE) compared to normal pregnant controls were studied. METHODS: All major databases were searched for eligible studies. We included 8 studies comparing serum IMA between NP and HC, 14 studies comparing serum IMA between PE and NP and 5 studies comparing cord-blood IMA between PE and NP groups...
August 17, 2017: Journal of Maternal-fetal & Neonatal Medicine
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