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https://www.readbyqxmd.com/read/28454357/expression-regulation-and-function-of-mir-495-in-healthy-and-tumor-tissues
#1
Hongli Chen, Xiaman Wang, Ju Bai, Aili He
MicroRNA-495 (miR-495) is a small non-coding RNA encoded by a gene located on chromosome 14 (14q32.31). Its expression is regulated by the transcription factors EF12 and EF47, in addition to promoter methylation status and the fusion oncoprotein mixed-lineage leukemia-AF9. Previous studies suggest that miR-495 is involved in various developmental, immunological and inflammatory processes in healthy tissue, and in the proliferation, invasion, metastasis and drug resistance of cancer cells. The role miR-495 serves in tumors is controversial...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28453788/usage-of-dexamethasone-increases-the-risk-of-cranial-neural-crest-dysplasia-in-the-chick-embryo
#2
Xin Cheng, He Li, Yu Yan, Guang Wang, Zachary Berman, Manli Chuai, Xuesong Yang
Dexamethasone (Dex) is commonly used in the treatment of a variety of benign and malignant conditions. Unfortunately, although it has a variety of teratogenic effects, it remains used in clinical practice for pregnant women mainly due to limited alternatives. However, there is limited knowledge of the mechanisms that lead to the observed teratogenic effects. In this study, the effects of Dex during embryogenesis on neural crest development were evaluated in the early chick embryos. First, we demonstrated that 100µL 10-6 M Dex treatment leads to craniofacial developmental defects, and also retards embryo growth and plausibly can cause embryo demise...
April 27, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28453785/structural-and-functional-characterization-of-the-pnkp-xrcc4-ligiv-dna-repair-complex
#3
R Daniel Aceytuno, Cortt G Piett, Zahra Havali-Shahriari, Ross A Edwards, Martial Rey, Ruiqiong Ye, Fatima Javed, Shujuan Fang, Rajam Mani, Michael Weinfeld, Michal Hammel, John A Tainer, David C Schriemer, Susan P Lees-Miller, J N Mark Glover
Non-homologous end joining (NHEJ) repairs DNA double strand breaks in non-cycling eukaryotic cells. NHEJ relies on polynucleotide kinase/phosphatase (PNKP), which generates 5΄-phosphate/3΄-hydroxyl DNA termini that are critical for ligation by the NHEJ DNA ligase, LigIV. PNKP and LigIV require the NHEJ scaffolding protein, XRCC4. The PNKP FHA domain binds to the CK2-phosphorylated XRCC4 C-terminal tail, while LigIV uses its tandem BRCT repeats to bind the XRCC4 coiled-coil. Yet, the assembled PNKP-XRCC4-LigIV complex remains uncharacterized...
April 27, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28453570/contrasting-effects-of-heat-pulses-on-different-trophic-levels-an-experiment-with-a-herbivore-parasitoid-model-system
#4
Stijn J J Schreven, Enric Frago, Annemiek Stens, Peter W de Jong, Joop J A van Loon
Under predicted global climate change, species will be gradually exposed to warmer temperatures, and to a more variable climate including more intense and more frequent heatwaves. Increased climatic variability is expected to have different effects on species and ecosystems than gradual warming. A key challenge to predict the impact of climate change is to understand how temperature changes will affect species interactions. Herbivorous insects and their natural enemies belong to some of the largest groups of terrestrial animals, and thus they have a great impact on the functioning of ecosystems and on the services these ecosystems provide...
2017: PloS One
https://www.readbyqxmd.com/read/28453394/expression-of-mir-23a-by-apoptotic-regulators-in-human-cancer-a-review
#5
Rabih Roufayel, Seifedine Kadry
MicroRNAs play fundamental roles in mammalian development, differentiation and cellular homeostasis by regulating essential processes such as proliferation, migration, metabolism, migration and cell death. These small non-coding RNAs are also responsible in RNA silencing, and in many developmental and pathological processes. Not surprisingly, miR-23a misexpression contributes to numerous diseases including cancer where certain miRNA genes have been classified as either oncogenes or tumor suppressor genes. Since a single microRNA is capable of targeting a large number of mRNA sequences, de-regulated miRNA expression has the ability to alter various transcripts and activate a wide range of cancer-related pathways...
April 28, 2017: Cancer Biology & Therapy
https://www.readbyqxmd.com/read/28453295/postinjury-exercise-and-platelet-rich-plasma-therapies-improve-skeletal-muscle-healing-in-rats-but-are-not-synergistic-when-combined
#6
Paola Contreras-Muñoz, Joan Ramon Torrella, Xavier Serres, David Rizo-Roca, Meritxell De la Varga, Ginés Viscor, Vicente Martínez-Ibáñez, José Luis Peiró, Tero A H Järvinen, Gil Rodas, Mario Marotta
BACKGROUND: Skeletal muscle injuries are the most common sports-related injury and a major concern in sports medicine. The effect of platelet-rich plasma (PRP) injections on muscle healing is still poorly understood, and current data are inconclusive. PURPOSE: To evaluate the effects of an ultrasound-guided intramuscular PRP injection, administered 24 hours after injury, and/or posttraumatic daily exercise training for 2 weeks on skeletal muscle healing in a recently established rat model of skeletal muscle injury that highly mimics the muscle trauma seen in human athletes...
April 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28449382/current-use-of-chromosomal-microarray-by-australian-paediatricians-and-implications-for-the-implementation-of-next-generation-sequencing
#7
Victoria McKay, Daryl Efron, Elizabeth E Palmer, Susan M White, Chris Pearson, Margie Danchin
AIM: Chromosomal microarray (CMA) is an important diagnostic test for children with multiple congenital anomalies or certain developmental behavioural problems suggestive of an underlying genetic diagnosis. However, there are medical and ethical complexities to its use and few Australian policies to guide practice. We aimed to describe the current practice of Australian paediatricians in relation to CMA testing. We hypothesised that there are knowledge gaps in their use of CMA. METHODS: Online survey completed between September 2015 and January 2016 by paediatricians in secondary care settings...
April 27, 2017: Journal of Paediatrics and Child Health
https://www.readbyqxmd.com/read/28449355/father-child-interactions-at-3-months-and-24-months-contributions-to-children-s-cognitive-development-at-24-months
#8
Vaheshta Sethna, Emily Perry, Jill Domoney, Jane Iles, Lamprini Psychogiou, Natasha E L Rowbotham, Alan Stein, Lynne Murray, Paul G Ramchandani
The quality of father-child interactions has become a focus of increasing research in the field of child development. We examined the potential contribution of father-child interactions at both 3 months and 24 months to children's cognitive development at 24 months. Observational measures of father-child interactions at 3 and 24 months were used to assess the quality of fathers' parenting (n = 192). At 24 months, the Mental Developmental Index (MDI) of the Bayley Scales of Infant Development, Second Edition (N...
April 27, 2017: Infant Mental Health Journal
https://www.readbyqxmd.com/read/28449119/mutations-in-thap11-cause-an-inborn-error-of-cobalamin-metabolism-and-developmental-abnormalities
#9
Anita M Quintana, Hung-Chun Yu, Alison Brebner, Mihaela Pupavac, Elizabeth A Geiger, Abigail Watson, Victoria L Castro, Warren Cheung, Shu-Huang Chen, David Watkins, Tomi Pastinen, Flemming Skovby, Bruce Appel, David S Rosenblatt, Tamim H Shaikh
CblX (MIM309541) is an X-linked recessive disorder characterized by defects in cobalamin (vitamin B12) metabolism and other developmental defects. Mutations in HCFC1, a transcriptional co-regulator which interacts with multiple transcription factors, have been associated with cblX. HCFC1 regulates cobalamin metabolism via the regulation of MMACHC expression through its interaction with THAP11, a THAP domain-containing transcription factor. The HCFC1/THAP11 complex potentially regulates genes involved in diverse cellular functions including cell cycle, proliferation, and transcription...
April 25, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28449103/novel-degenerative-and-developmental-defects-in-a-zebrafish-model-of-mucolipidosis-type-iv
#10
Huiqing Li, Wuhong Pei, Sivia Vergarajauregui, Patricia M Zerfas, Nina Raben, Shawn M Burgess, Rosa Puertollano
Mucolipidosis type IV (MLIV) is a lysosomal storage disease characterized by neurologic and ophthalmologic abnormalities. There is currently no effective treatment. MLIV is caused by mutations in MCOLN1, a lysosomal cation channel from the transient receptor potential (TRP) family. In this study we used genome editing to knockout the two mcoln1 genes present in Dario rerio (zebrafish). Our model successfully reproduced the retinal and neuromuscular defects observed in MLIV patients, indicating that this model is suitable for studying the disease pathogenesis...
April 25, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28449092/genome-wide-dna-methylomes-from-discrete-developmental-stages-reveal-the-predominance-of-non-cpg-methylation-in-tribolium-castaneum
#11
Xiaowen Song, Fei Huang, Juanjuan Liu, Chengjun Li, Shanshan Gao, Wei Wu, Mengfan Zhai, Xiaojuan Yu, Wenfeng Xiong, Jia Xie, Bin Li
Cytosine DNA methylation is a vital epigenetic regulator of eukaryotic development. Whether this epigenetic modification occurs in Tribolium castaneum has been controversial, its distribution pattern and functions have not been established. Here, using bisulphite sequencing (BS-Seq), we confirmed the existence of DNA methylation and described the methylation profiles of the four life stages of T. castaneum. In the T. castaneum genome, both symmetrical CpG and non-CpG methylcytosines were observed. Symmetrical CpG methylation, which was catalysed by DNMT1 and occupied a small part in T...
April 25, 2017: DNA Research: An International Journal for Rapid Publication of Reports on Genes and Genomes
https://www.readbyqxmd.com/read/28449076/qtl-analysis-of-the-developmental-response-to-l-glutamate-in-arabidopsis-roots-and-its-genotype-by-environment-interactions
#12
Pia Walch-Liu, Rhonda C Meyer, Thomas Altmann, Brian G Forde
Primary root growth in Arabidopsis and a number of other species has previously been shown to be remarkably sensitive to the presence of external glutamate, with glutamate signalling eliciting major changes in root architecture. Using two recombinant inbred lines from reciprocal crosses between Arabidopsis accessions C24 and Col-0, we have identified one large-effect quantitative trait locus (QTL), GluS1, and two minor QTLs, GluS2 and GluS3, which together accounted for 41% of the phenotypic variance in glutamate sensitivity...
April 26, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28449057/the-streptomyces-master-regulator-bldd-binds-c-di-gmp-sequentially-to-create-a-functional-bldd2-c-di-gmp-4-complex
#13
Maria A Schumacher, Wenjie Zeng, Kim C Findlay, Mark J Buttner, Richard G Brennan, Natalia Tschowri
Streptomyces are ubiquitous soil bacteria that undergo a complex developmental transition coinciding with their production of antibiotics. This transition is controlled by binding of a novel tetrameric form of the second messenger, 3΄-5΄ cyclic diguanylic acid (c-di-GMP) to the master repressor, BldD. In all domains of life, nucleotide-based second messengers allow a rapid integration of external and internal signals into regulatory pathways that control cellular responses to changing conditions. c-di-GMP can assume alternative oligomeric states to effect different functions, binding to effector proteins as monomers, intercalated dimers or, uniquely in the case of BldD, as a tetramer...
April 26, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28449056/plant-hexokinases-are-multifaceted-proteins
#14
Giovanna P Aguilera-Alvarado, Sobeida Sánchez-Nieto
Sugars are the main carbon and energy source in cells, but they can also act as signaling molecules that affect the whole plant life cycle. Certain tissues can produce sugars and supply them to others, and this plant tissue heterogeneity makes sugar signaling a highly complex process that requires elements capable of perceiving changes in sugar concentrations among different tissues, cell compartments and developmental stages. In plants, the regulatory effects of Glucose (Glc) have been the most studied to date...
April 25, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28448841/why-computer-models-help-to-understand-developmental-processes
#15
E Saskia Kunnen
It is argued that simulating psychological processes by means of computer models is a valuable technique to increase our understanding of adolescent developmental processes. Modelling offers possibilities to test hypotheses that cannot be reached by designing empirical studies only and it allows us to investigate adolescent development as the complex and non-linear process that it is.
April 24, 2017: Journal of Adolescence
https://www.readbyqxmd.com/read/28448814/which-maltreated-children-are-at-greatest-risk-of-aggressive-and-criminal-behavior-an-examination-of-maltreatment-dimensions-and-cumulative-risk
#16
Melissa Van Wert, Faye Mishna, Nico Trocmé, Barbara Fallon
This paper explores the well-documented relationship between child maltreatment and aggressive and criminal behavior, specifically examining several dimensions of maltreatment and cumulative child and family risk. Using data from the provincially representative Ontario Incidence Study of Reported Child Abuse and Neglect (OIS-2013), this paper utilizes a developmental lens to examine whether maltreatment dimensions and cumulative risk can differentiate maltreated young people who exhibit aggressive and criminal behaviors and those who do not...
April 24, 2017: Child Abuse & Neglect
https://www.readbyqxmd.com/read/28448789/development-of-pre-implantation-porcine-blastocysts-cultured-within-alginate-hydrogel-systems-either-supplemented-with-secreted-phosphoprotein-1-or-conjugated-with-arg-gly-asp-peptide
#17
Taylor D Laughlin, Jeremy R Miles, Elane C Wright-Johnson, Lea A Rempel, Clay A Lents, Angela K Pannier
Although deficiencies in porcine blastocyst elongation play a significant role in early embryonic mortality and establishment of within-litter developmental variation, the exact mechanisms of elongation are poorly understood. Secreted phosphoprotein 1 (SPP1) is increased within the uterine milieu during early porcine pregnancy and contains an Arg-Gly-Asp (RGD) peptide sequence that binds to cell surface integrins on the uterine endometrium and trophectoderm, promoting cell adhesion and migration. The aim of the present study was to evaluate the development of preimplantation porcine blastocysts encapsulated and cultured within alginate hydrogels either supplemented with SPP1 or conjugated with RGD...
April 28, 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/28448705/-results-of-the-salters-osteotomy-as-a-definitive-treatment-for-the-developmental-dysplasia-of-the-hip
#18
E M Valles-Mata, L A Valles-Flores, R F Montes-Del Bosque
OBJECTIVE: Evaluate the results of open reduction associated to a Salter osteotomy at nine months of age for treatment of the developmental Dysplasia of the Hip. MATERIAL AND METHODS: Case- series of unilateral Developmental Dysplasia of the hip treated between July 2004- December 2008 with follow-up at 3, 6 and 9 months postop. RESULTS: 16 patients, 13 females (81%) 3 males (19%). we did an open reduction and Salters osteotomy at 9 months on average (8- 10 months); the most effected side were the left hip on 75%...
September 2016: Acta Ortopédica Mexicana
https://www.readbyqxmd.com/read/28448695/long-term-memory-in-older-children-adolescents-and-adults-with-autism-spectrum-disorder
#19
Diane L Williams, Nancy J Minshew, Gerald Goldstein, Carla A Mazefsky
This study extends prior memory reports in autism spectrum disorders (ASD) by investigating memory for narratives after longer recall periods and by examining developmental aspects of narrative memory using a cross-sectional design. Forty-seven older children/adolescents with ASD and 31 youth with typical development (TD) and 39 adults with ASD and 45 TD adults were compared on memory for stories from standardized measures appropriate for each age group at three intervals (immediate, 30 min, and 2 day). Both the youth with and without ASD had difficulty with memory for story details with increasing time intervals...
April 27, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28448685/adult-neurobehavioral-alterations-in-male-and-female-mice-following-developmental-exposure-to-paracetamol-acetaminophen-characterization-of-a-critical-period
#20
Gaëtan Philippot, Torsten Gordh, Anders Fredriksson, Henrik Viberg
Paracetamol (acetaminophen) is a widely used non-prescription drug with analgesic and antipyretic properties. Among pregnant women and young children, paracetamol is one of the most frequently used drugs and is considered the first-choice treatment for pain and/or fever. Recent findings in both human and animal studies have shown associations between paracetamol intake during brain development and adverse behavioral outcomes later in life. The present study was undertaken to investigate if the induction of these effects depend on when the exposure occurs during a critical period of brain development and if male and female mice are equally affected...
April 27, 2017: Journal of Applied Toxicology: JAT
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