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https://www.readbyqxmd.com/read/28223366/la-deletion-from-mouse-brain-alters-pre-trna-metabolism-and-accumulation-of-pre-5-8s-rrna-with-neuron-death-and-reactive-astrocytosis
#1
Nathan H Blewett, James R Iben, Sergei Gaidamakov, Richard J Maraia
Human La antigen (Sjögren's syndrome antigen B, SSB) is an abundant multifunctional RNA-binding protein. In the nucleoplasm, La binds to and protects from 3' exonucleases, the ends of precursor-tRNAs and other transcripts synthesized by RNA polymerase III, and facilitates their maturation, while a nucleolar isoform has been implicated in rRNA biogenesis by multiple independent lines of evidence. We showed earlier that conditional La knockout (La cKO) from mouse cortex neurons results in defective tRNA processing although pathway(s) involved in neuronal loss thereafter was unknown...
February 21, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28223317/stabilized1-modulates-pre-mrna-splicing-for-thermotolerance
#2
Geundon Kim, Young-Hee Cho, Byeong-Ha Lee, Sang-Dong Yoo
High temperature stress often leads to differential RNA splicing, thus accumulating different types and/or amounts of mature mRNAs in eukaryotic cells. However, regulatory mechanisms underlying plant pre-mRNA splicing in the environmental stress conditions remain elusive. Herein, we describe that a U5-snRNP-interacting protein homolog STABILIZED1 (STA1) has pre-mRNA splicing activity for heat-inducible transcripts including HEAT STRESS TRANSCRIPTION FACTORS and various HEAT SHOCK PROTEINS for the establishment of heat stress tolerance in Arabidopsis thaliana...
February 21, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28220836/nucleobindin-1-binds-to-multiple-types-of-pre-fibrillar-amyloid-and-inhibits-fibrillization
#3
Alessandra Bonito-Oliva, Shahar Barbash, Thomas P Sakmar, W Vallen Graham
During amyloid fibril formation, amyloidogenic polypeptides misfold and self assemble into soluble pre-fibrillar aggregates, i.e., protofibrils, which elongate and mature into insoluble fibrillar aggregates. An emerging class of chaperones, chaperone-like amyloid binding proteins (CLABPs), has been shown to interfere with aggregation of particular misfolded amyloid peptides or proteins. We have discovered that the calcium-binding protein nuclebindin-1 (NUCB1) is a novel CLABP. We show that NUCB1 inhibits aggregation of islet-amyloid polypeptide associated with type 2 diabetes mellitus, a-synuclein associated with Parkinson's disease, transthyretin V30M mutant associated with familial amyloid polyneuropathy, and Aβ42 associated with Alzheimer's disease by stabilizing their respective protofibril intermediates...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28220193/hsa-mir-4485-regulates-mitochondrial-functions-and-inhibits-the-tumorigenicity-of-breast-cancer-cells
#4
Lakshmi Sripada, Kritarth Singh, Anastasiya V Lipatova, Aru Singh, Paresh Prajapati, Dhanendra Tomar, Khyati Bhatelia, Milton Roy, Rochika Singh, Madan M Godbole, Peter M Chumakov, Rajesh Singh
The modulation of mitochondrial functions is important for maintaining cellular homeostasis. Mitochondria essentially depend on the import of RNAs and proteins encoded by the nuclear genome. MicroRNAs encoded in the nucleus can translocate to mitochondria and target the genome, affecting mitochondrial function. Here, we analyzed the role of miR-4485 in the regulation of mitochondrial functions. We showed that miR-4485 translocated to mitochondria where its levels varied in response to different stress conditions...
February 20, 2017: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/28218971/growth-factors-and-hormones-pro-peptides-the-unexpected-adventures-of-the-bdnf-prodomain-pbdnf
#5
REVIEW
Juan Pablo Zanin, Nicolás Unsain, Agustin Anastasia
Most growth factors and hormones are synthesized as pre-pro-proteins which are processed to the biologically active mature protein. The pre- and prodomains are cleaved from the precursor protein in the secretory pathway or, in some cases, extracellularly. The canonical functions of these prodomains are to assist in folding and stabilization of the mature domain, to direct intra and extracellular localization, to facilitate storage, and to regulate bioavailability of their mature counterpart. Recently, exciting evidence has revealed that prodomains of certain growth factors, after cleaved from the precursor pro-protein, can act as independent active signaling molecules...
February 20, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28218896/a-variant-in-the-precursor-of-microrna-146a-is-responsible-for-development-of-erectile-dysfunction-in-patients-with-chronic-prostatitis-via-targeting-nos1
#6
Jian Ding, Yuxin Tang, Zhengyan Tang, Xiangyang Zhang, Guilin Wang
BACKGROUND The morbidity of erectile dysfunction (ED) has been found to be substantially increased in patients with chronic prostatitis (CP). Accumulating evidence shows that single-nucleotide polymorphism (SNP) located in pre-miRNA or mature microRNA may affect the processing of microRNA (miRNA) and alter the expression of the miRNA, as well as its target gene. In this study we investigated the association between rs2910164 G/C polymorphism and risk of ED in patients with CP, as well as the underlying molecular mechanism...
February 20, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28218807/characterizing-fish-responses-to-a-river-restoration-over-21-years-based-on-species-traits
#7
Stefanie Höckendorff, Jonathan D Tonkin, Peter Haase, Margret Bunzel-Drüke, Olaf Zimball, Matthias Scharf, Stefan Stoll
Understanding restoration effectiveness is often impaired by a lack of quality, long-term monitoring data and, to date, few studies have used species trait information to gain insight into the processes that drive the reaction of fish communities to restoration. We examined fish community responses using a highly resolved dataset with 21 consecutive years of data (4 years pre- and 17 years post-restoration) at multiple restored and unrestored sampling reaches from a river restoration project at the Lippe River, Germany...
February 20, 2017: Conservation Biology: the Journal of the Society for Conservation Biology
https://www.readbyqxmd.com/read/28218636/lobular-distribution-and-variability-in-hepatic-atp-binding-cassette-protein-b1-abcb1-p-gp-ontogenetic-differences-and-potential-for-toxicity
#8
Ngu Njei Abanda, Zoe Riches, Abby C Collier
The ATP Binding Cassette B1 (ABCB1) transporter has critical roles in endo- and xenobiotic efficacy and toxicity. To understand population variability in hepatic transport we determined ABCB1 mRNA and protein levels in total liver lysates sampled from 8 pre-defined sites (n = 24, 18-69 years), and in S9 from randomly acquired samples (n = 87, 7 days-87 years). ABCB1 levels did not differ significantly throughout individual livers and showed 4.4-fold protein variation between subjects. Neither mRNA nor protein levels varied with sex, ethnicity, obesity or triglycerides in lysates or S9 (that showed the same relationships), but protein levels were lower in pediatric S9 (p < 0...
February 17, 2017: Pharmaceutics
https://www.readbyqxmd.com/read/28218361/arteriovenous-fistula-maturation-in-patients-with-permanent-access-created-prior-to-or-after-hemodialysis-initiation
#9
Juan C Duque, Laisel Martinez, Marwan Tabbara, Denise Dvorquez, Sushil K Mehandru, Arif Asif, Roberto I Vazquez-Padron, Loay H Salman
INTRODUCTION: Multiple factors and comorbidities have been implicated in the ability of arteriovenous fistulas (AVF) to mature, including vessel anatomy, advanced age, and the presence of coronary artery disease or peripheral vascular disease. However, little is known about the role of uremia on AVF primary failure. In this study, we attempt to evaluate the effect of uremia on AVF maturation by comparing AVF outcomes between pre-dialysis chronic kidney disease (CKD) stage five patients and those who had their AVF created after hemodialysis (HD) initiation...
February 15, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/28217708/aberrant-rna-splicing-and-mutations-in-spliceosome-complex-in-acute-myeloid-leukemia
#10
COMMENT
Jianbiao Zhou, Wee-Joo Chng
The spliceosome, the cellular splicing machinery, regulates RNA splicing of messenger RNA precursors (pre-mRNAs) into maturation of protein coding RNAs. Recurrent mutations and copy number changes in genes encoding spliceosomal proteins and splicing regulatory factors have tumor promoting or suppressive functions in hematological malignancies, as well as some other cancers. Leukemia stem cell (LSC) populations, although rare, are essential contributors of treatment failure and relapse. Recent researches have provided the compelling evidence that link the erratic spicing activity to the LSC phenotype in acute myeloid leukemia (AML)...
2017: Stem Cell Investigation
https://www.readbyqxmd.com/read/28215488/gonadotropin-releasing-hormone-agonist-gnrha-trigger-state-of-the-art
#11
REVIEW
C Dosouto, T Haahr, P Humaidan
GnRH agonist (GnRHa) trigger for final oocyte maturation in GnRH antagonist co-treated IVF/ICSI cycles significantly reduces the risk of ovarian hyperstimulation syndrome (OHSS). GnRHa trigger followed by modifications of the standard luteal phase support (modified luteal phase support) secures fresh transfer in the majority of patients with excellent reproductive outcomes. In freeze all cycles (segmented cycles) GnRHa trigger allows oocyte retrieval with a minimal risk of early onset OHSS and good reproductive outcomes in subsequent frozen thaw cycles...
February 16, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28210809/growth-dynamics-of-juvenile-loggerhead-sea-turtles-undergoing-an-ontogenetic-habitat-shift
#12
Matthew D Ramirez, Larisa Avens, Jeffrey A Seminoff, Lisa R Goshe, Selina S Heppell
Ontogenetic niche theory predicts that individuals may undergo one or more changes in habitat or diet throughout their lifetime to maintain optimal growth rates, or to optimize trade-offs between mortality risk and growth. We combine skeletochronological and stable nitrogen isotope (δ(15)N) analyses of sea turtle humeri (n = 61) to characterize the growth dynamics of juvenile loggerhead sea turtles (Caretta caretta) during an oceanic-to-neritic ontogenetic shift. The primary objective of this study was to determine how ontogenetic niche theory extends to sea turtles, and to individuals with different patterns of resource use (discrete shifters, n = 23; facultative shifters n = 14; non-shifters, n = 24)...
February 16, 2017: Oecologia
https://www.readbyqxmd.com/read/28207797/mutation-increasing-%C3%AE-carotene-concentrations-does-not-adversely-affect-concentrations-of-essential-mineral-elements-in-pepper-fruit
#13
Nasya B Tomlekova, Philip J White, Jacqueline A Thompson, Emil A Penchev, Stephan Nielen
Vitamin and mineral deficiencies are prevalent in human populations throughout the world. Vitamin A deficiency affects hundreds of millions of pre-school age children in low income countries. Fruits of pepper (Capsicum annuum L.) can be a major dietary source of precursors to Vitamin A biosynthesis, such as β-carotene. Recently, pepper breeding programs have introduced the orange-fruited (of) trait of the mutant variety Oranzheva kapiya, which is associated with high fruit β-carotene concentrations, to the mutant variety Albena...
2017: PloS One
https://www.readbyqxmd.com/read/28205395/pregnancy-outcomes-and-contraceptive-use-in-patients-with-systemic-lupus-erythematosus-rheumatoid-arthritis-and-women-without-a-chronic-illness-a-comparative-study
#14
Priyadarshani Galappatthy, Jayan D D Jayasinghe, Sampath C Paththinige, Rezvi M H Sheriff, Lalith S Wijayaratne
OBJECTIVES: To compare the pregnancy outcomes and contraceptive practices in systemic lupus erythematosus (SLE), rheumatoid arthritis (RA) and women with no chronic illness (WNCI) in a tertiary care referral center in Colombo, Sri Lanka. METHODS: Patients with SLE satisfying American College of Rheumatology criteria for diagnosis and history of pregnancies were recruited from university lupus clinic, National Hospital of Sri Lanka (NHSL). Age-matched women with history of pregnancy and RA were recruited from the rheumatology clinic, NHSL and WNCI from a surgical clinic...
February 16, 2017: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/28203569/comparison-of-activator-headgear-and-twin-block-treatment-approaches-in-class-ii-division-1-malocclusion
#15
Stjepan Spalj, Kate Mroz Tranesen, Kari Birkeland, Visnja Katic, Andrej Pavlic, Vaska Vandevska-Radunovic
The purpose was to compare the treatment effects of functional appliances activator-headgear (AH) and Twin Block (TB) on skeletal, dental, and soft-tissue structures in class II division 1 malocclusion with normal growth changes in untreated subjects. The sample included 50 subjects (56% females) aged 8-13 years with class II division 1 malocclusion treated with either AH (n = 25) or TB (n = 25) appliances. Pre- and posttreatment lateral cephalograms were evaluated and compared to 50 untreated class II division 1 cases matched by age, gender, ANB angle, and skeletal maturity...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28203028/-unerupted-first-deciduous-molar-located-higher-to-the-first-premolar-a-case-report
#16
Y Zhan, H Liu
Tooth eruption is defined as the movement of a tooth from its site of development within the alveolar process to its functional position in the oral cavity. The process of tooth eruption can be divided into different phases: pre-eruptive bone stage, alveolar bone stage, mucosal stage, preocclusal stage, occlusal stage and maturation stage. Any disturbance in these phases can lead to eruptive anomalies. The incidence of unerupted teeth is usually higher among permanent teeth than among deciduous ones. Of the primary teeth reported as unerupted, second deciduous molars are the teeth most frequently involved, followed by primary central incisors...
February 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28192512/explosive-strength-and-endurance-adaptations-in-young-elite-soccer-players-during-two-soccer-seasons
#17
Riccardo Di Giminiani, Christiano Visca
The purpose of the present study was to investigate the explosive strength and endurance adaptations in young elite soccer players who underwent a supervised training program for a period of two years. Nineteen players, with seven years of training experience (age: 13.3 ± 0.1 years; body weight: 57.9 ± 4.9 kg; height: 168.9 ± 4.7 cm; BMI: 20.1 ± 1.1 kg/m2), voluntarily participated in the present study. The testing sessions were performed at the beginning of the preparation period in the first (T1), second (T2), and third year (T3)...
2017: PloS One
https://www.readbyqxmd.com/read/28188861/functions-of-rho-family-of-small-gtpases-and-rho-associated-coiled-coil-kinases-in-bone-cells-during-differentiation-and-mineralization
#18
REVIEW
Agnieszka Strzelecka-Kiliszek, Saida Mebarek, Monika Roszkowska, René Buchet, David Magne, Slawomir Pikula
BACKGROUND: Members of Rho-associated coiled-coil kinases (ROCKs) are effectors of Rho family of small GTPases. ROCKs have multiple functions that include regulation of cellular contraction and polarity, adhesion, motility, proliferation, apoptosis, differentiation, maturation and remodeling of the extracellular matrix (ECM). SCOPE OF THE REVIEW: Here, we focus on the action of RhoA and RhoA effectors, ROCK1 and ROCK2, in cells related to tissue mineralization: mesenchymal stem cells, chondrocytes, pre-osteoblasts, osteoblasts, osteocytes, lining cells and osteoclasts...
February 7, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28186996/harnessing-rna-sequencing-for-global-unbiased-evaluation-of-two-new-adjuvants-for-dendritic-cell-immunotherapy
#19
Till S M Mathan, Johannes Textor, Annette E Sköld, Inge Reinieren-Beeren, Tom van Oorschot, Mareke Brüning, Carl G Figdor, Sonja I Buschow, Ghaith Bakdash, I Jolanda M de Vries
Effective stimulation of immune cells is crucial for the success of cancer immunotherapies. Current approaches to evaluate the efficiency of stimuli are mainly defined by known flow cytometry-based cell activation or cell maturation markers. This method however does not give a complete overview of the achieved activation state and may leave important side effects unnoticed. Here, we used an unbiased RNA sequencing (RNA-seq)-based approach to compare the capacity of four clinical-grade dendritic cell (DC) activation stimuli used to prepare DC-vaccines composed of various types of DC subsets; the already clinically applied GM-CSF and Frühsommer meningoencephalitis (FSME) prophylactic vaccine and the novel clinical grade adjuvants protamine-RNA complexes (pRNA) and CpG-P...
February 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28186129/pan-retinal-characterisation-of-light-responses-from-ganglion-cells-in-the-developing-mouse-retina
#20
Gerrit Hilgen, Sahar Pirmoradian, Daniela Pamplona, Pierre Kornprobst, Bruno Cessac, Matthias H Hennig, Evelyne Sernagor
We have investigated the ontogeny of light-driven responses in mouse retinal ganglion cells (RGCs). Using a large-scale, high-density multielectrode array, we recorded from hundreds to thousands of RGCs simultaneously at pan-retinal level, including dorsal and ventral locations. Responses to different contrasts not only revealed a complex developmental profile for ON, OFF and ON-OFF responses, but also unveiled differences between dorsal and ventral RGC responses. At eye-opening, dorsal RGCs of all types were more responsive to light, perhaps indicating an environmental priority to nest viewing for pre-weaning pups...
February 10, 2017: Scientific Reports
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