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https://www.readbyqxmd.com/read/28815917/hiv-infected-patients-beliefs-about-their-chronic-co-treatments-in-comparison-with-their-combined-antiretroviral-therapy
#1
S Kamal, O Bugnon, M Cavassini, M P Schneider
OBJECTIVES: Thanks to the success of combination antiretroviral therapy (cART), HIV-infected patients can have almost a normal life expectancy. This has resulted in an aging HIV-infected population with other chronic comorbidities such as cardiovascular diseases, osteoporosis, and depression. Our hypothesis is that patients' perceptions of and attitudes towards their cART, which is perceived as crucial to their survival, differ from their beliefs about their co-treatments, and this may have an impact on their medication adherence...
August 16, 2017: HIV Medicine
https://www.readbyqxmd.com/read/28809768/missed-opportunities-for-chlamydia-screening-in-title-x-family-planning-clinics
#2
Sarah Goldenkranz Salomon, Elizabeth Torrone, Wendy Nakatsukasa-Ono, David N Fine
BACKGROUND: Annual chlamydia (CT) screening is recommended for women younger than 25 years, yet less than half of young women seeking health care are screened annually. We analyzed Title X family planning service data from the Northwest United States to assess factors associated with missed opportunities for CT screening. Our primary hypothesis was screening coverage is higher during annual preventive health visits compared to other visit types. Study objectives were: (1) identify gaps in screening coverage by patient demographics, visit characteristics, and clinic measures; and (2) examine the association between visit type and CT screening by controlling for other covariates and stratifying by state...
September 2017: Sexually Transmitted Diseases
https://www.readbyqxmd.com/read/28806979/breath-giving-cooperation-critical-review-of-origin-of-mitochondria-hypotheses-major-unanswered-questions-point-to-the-importance-of-early-ecology
#3
REVIEW
István Zachar, Eörs Szathmáry
The origin of mitochondria is a unique and hard evolutionary problem, embedded within the origin of eukaryotes. The puzzle is challenging due to the egalitarian nature of the transition where lower-level units took over energy metabolism. Contending theories widely disagree on ancestral partners, initial conditions and unfolding of events. There are many open questions but there is no comparative examination of hypotheses. We have specified twelve questions about the observable facts and hidden processes leading to the establishment of the endosymbiont that a valid hypothesis must address...
August 14, 2017: Biology Direct
https://www.readbyqxmd.com/read/28806412/missed-opportunities-for-hiv-control-gaps-in-hiv-testing-for-partners-of-people-living-with-hiv-in-lima-peru
#4
Ana L Vasquez, Renato A Errea, Daniel Hoces, Juan Echevarria, Elsa González-Lagos, Eduardo Gotuzzo
INTRODUCTION: Based on the hypothesis that HIV programs struggle to deliver health services that harmonize necessities of treatment and prevention, we described the outcomes of routinely provided HIV testing to partners of people living with HIV (PLWH) through a secondary analysis of routine data collected at a public hospital in Lima, Peru. METHODS: Among PLWH enrolled in the study center's HIV program between 2005 and 2014, we identified index cases (IC): PLWH who reported a unique partner not previously enrolled...
2017: PloS One
https://www.readbyqxmd.com/read/28795438/a-specific-gabaergic-synapse-onto-oligodendrocyte-precursors-does-not-regulate-cortical-oligodendrogenesis
#5
Maddalena Balia, Najate Benamer, María Cecilia Angulo
In the brain, neurons establish bona fide synapses onto oligodendrocyte precursor cells (OPCs), but the function of these neuron-glia synapses remains unresolved. A leading hypothesis suggests that these synapses regulate OPC proliferation and differentiation. However, a causal link between synaptic activity and OPC cellular dynamics is still missing. In the developing somatosensory cortex, OPCs receive a major type of synapse from GABAergic interneurons that is mediated by postsynaptic γ2-containing GABAA receptors...
August 10, 2017: Glia
https://www.readbyqxmd.com/read/28769053/link-prediction-in-evolving-networks-based-on-popularity-of-nodes
#6
Tong Wang, Xing-Sheng He, Ming-Yang Zhou, Zhong-Qian Fu
Link prediction aims to uncover the underlying relationship behind networks, which could be utilized to predict missing edges or identify the spurious edges. The key issue of link prediction is to estimate the likelihood of potential links in networks. Most classical static-structure based methods ignore the temporal aspects of networks, limited by the time-varying features, such approaches perform poorly in evolving networks. In this paper, we propose a hypothesis that the ability of each node to attract links depends not only on its structural importance, but also on its current popularity (activeness), since active nodes have much more probability to attract future links...
August 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28764803/a-novel-rlbp1-gene-geographical-area-related-mutation-present-in-a-young-patient-with-retinitis-punctata-albescens
#7
Concetta Scimone, Luigi Donato, Teresa Esposito, Carmela Rinaldi, Rosalia D'Angelo, Antonina Sidoti
BACKGROUND: Autosomal recessive forms of retinitis punctata albescens (RPA) have been described. RPA is characterized by progressive retinal degeneration due to alteration in visual cycle and consequent deposit of photopigments in retinal pigment epithelium. Five loci have been linked to RPA onset. Among these, the retinaldehyde-binding protein 1 gene, RLBP1, is the most frequently involved and several founder mutations were reported. We report results of a genetic molecular investigation performed on a large Sicilian family in which appears a young woman with RPA...
August 1, 2017: Human Genomics
https://www.readbyqxmd.com/read/28759178/mutations-in-axin2-gene-as-a-risk-factor-for-tooth-agenesis-and-cancer-a-review
#8
(no author information available yet)
AXIN2 gene plays a crucial role in morphogenesis of craniofacial area and is essential for tooth development. AXIN2 gene is one of the most studied genes associated with tooth agenesis, the most common defect of dentition in humans. Polymorphic variants in AXIN2 gene are discussed in relation to the occurrence of the tooth agenesis but also as an indication of the risk of cancer. Mutations in AXIN2 gene were found in patients with colorectal or hepatocellular carcinoma, prostate cancer, ovarium or lung cancer...
July 31, 2017: Neuro Endocrinology Letters
https://www.readbyqxmd.com/read/28756747/nampt-mediated-nad-biosynthesis-as-the-internal-timing-mechanism-in-nad-world-time-is-running-in-its-own-way
#9
Borut Poljsak
The biological age of organisms differs from the chronological age and is determined by internal aging clock(s). How cells estimate time on a scale of 24 h is relatively well-studied; however, how biological time is measured by cells, tissues, organs or organisms in longer time periods (years and decades) is largely unknown. What is clear and widely agreed upon is that the link to age and age-related diseases is not chronological, as it does not depend on a fixed passage of time. Rather, this link depends on the biological age of an individual cell, tissue, organ or organism and not on time in a strictly chronological sense...
July 29, 2017: Rejuvenation Research
https://www.readbyqxmd.com/read/28743284/hypertension-prevalence-and-influence-of-basal-metabolic-rate-on-blood-pressure-among-adult-students-in-bangladesh
#10
Nurshad Ali, Shakil Mahmood, M Manirujjaman, Rasheda Perveen, Abdullah Al Nahid, Shamim Ahmed, Farida Adib Khanum, Mustafizur Rahman
BACKGROUND: Hypertension is a global health issue and is currently increasing at rapid pace in South Asian countries including Bangladesh. Although, some studies on hypertension have been conducted in Bangladesh, there is a lack of scientific evidence in the adult student population that was missing from the previous and recent national cross-sectional studies. Moreover, the specific risk factors of hypertension in the Bangladeshi adults still need to be investigated. This study was conducted to estimate hypertension prevalence among adult students in Bangladesh and to test the hypothesis of Luke et al...
July 25, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28738478/-less-common-variants-association-study-and-statistical-analysis
#11
X Liao, J Deng, J Y Xun, J X Yan
In the past decade, based on the "common disease-common variant" hypothesis, genomewide association studies (GWAS) have been extensively used to dissect the genetic components of complex diseases and quantitative traits. However, the identified disease-associated common variants by GWASs can only explain small part of the corresponding disease heritability. "Common disease-rare variant" hypothesis has been proposed to explore the missed heritability. With the development of the next generation sequencing technology, various association studies of less common variants are ongoing...
July 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28737695/predictive-structure-and-topology-of-peroxisomal-atp-binding-cassette-abc-transporters
#12
Pierre Andreoletti, Quentin Raas, Catherine Gondcaille, Mustapha Cherkaoui-Malki, Doriane Trompier, Stéphane Savary
The peroxisomal ATP-binding Cassette (ABC) transporters, which are called ABCD1, ABCD2 and ABCD3, are transmembrane proteins involved in the transport of various lipids that allow their degradation inside the organelle. Defective ABCD1 leads to the accumulation of very long-chain fatty acids and is associated with a complex and severe neurodegenerative disorder called X-linked adrenoleukodystrophy (X-ALD). Although the nucleotide-binding domain is highly conserved and characterized within the ABC transporters family, solid data are missing for the transmembrane domain (TMD) of ABCD proteins...
July 22, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28729870/plastid-nucleus-distance-alters-the-behavior-of-stromules
#13
Jessica L Erickson, Matthias Kantek, Martin H Schattat
Plastids send "retrograde" signals to the nucleus to deliver information regarding their physiological status. One open question concerning this signal transfer is how the signal bridges the cytoplasm. Based on individual reports of plastid derived tubular membrane extensions connecting to nuclei, these so-called stromules have been suggested to function as communication routes between plastids and nuclei in response to biotic stress. However, based on the data currently available it is unclear whether interactions between stromules and nuclei are truly intentional or observed as a result of an inflated stromule frequency throughout the cell, and are thus a random event...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28717880/environmental-exposure-does-not-explain-putative-maladaptation-in-road-adjacent-populations
#14
Steven P Brady
While the ecological consequences of roads are well described, little is known of their role as agents of natural selection, which can shape adaptive and maladaptive responses in populations influenced by roads. This knowledge gap persists despite a growing appreciation for the influence of evolution in human-altered environments. There, insights indicate that natural selection typically results in local adaptation. Thus, populations influenced by road-induced selection should evolve fitness advantages in their local environment...
July 17, 2017: Oecologia
https://www.readbyqxmd.com/read/28700585/validation-of-the-sensitivity-of-the-national-emergency-x-radiography-utilization-study-nexus-head-computed-tomographic-ct-decision-instrument-for-selective-imaging-of-blunt-head-injury-patients-an-observational-study
#15
William R Mower, Malkeet Gupta, Robert Rodriguez, Gregory W Hendey
BACKGROUND: Clinicians, afraid of missing intracranial injuries, liberally obtain computed tomographic (CT) head imaging in blunt trauma patients. Prior work suggests that clinical criteria (National Emergency X-Radiography Utilization Study [NEXUS] Head CT decision instrument [DI]) can reliably identify patients with important injuries, while excluding injury, and the need for imaging in many patients. Validating this DI requires confirmation of the hypothesis that the lower 95% confidence limit for its sensitivity in detecting serious injury exceeds 99...
July 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28699110/immune-selection-during-tumor-checkpoint-inhibition-therapy-paves-way-for-nk-cell-missing-self-recognition
#16
REVIEW
Karl-Johan Malmberg, Ebba Sohlberg, Jodie P Goodridge, Hans-Gustaf Ljunggren
The ability of NK cells to specifically recognize cells lacking expression of self-MHC class I molecules was discovered over 30 years ago. It provided the foundation for the "missing self" hypothesis. Research in the two past decades has contributed to a detailed understanding of the molecular mechanisms that determine the specificity and strength of NK cell-mediated "missing self" responses to tumor cells. However, in light of the recent remarkable breakthroughs in clinical cancer immunotherapy, the cytolytic potential of NK cells still remains largely untapped in clinical settings...
August 2017: Immunogenetics
https://www.readbyqxmd.com/read/28690866/serotonergic-neurons-in-the-ventral-nerve-cord-of-chilopoda-a-mandibulate-pattern-of-individually-identifiable-neurons
#17
Andy Sombke, Torben Stemme
BACKGROUND: Given the numerous hypotheses concerning arthropod phylogeny, independent data are needed to supplement knowledge based on traditional external morphology and modern molecular sequence information. One promising approach involves comparisons of the structure and development of the nervous system. Along these lines, the morphology of serotonin-immunoreactive neurons in the ventral nerve cord has been investigated in numerous tetraconate taxa (Crustacea and Hexapoda). It has been shown that these neurons can be identified individually due to their comparably low number, characteristic soma position, and neurite morphology, thus making it possible to establish homologies at the single cell level...
2017: Zoological Letters
https://www.readbyqxmd.com/read/28684887/reporting-practices-and-use-of-quantitative-methods-in-canadian-journal-articles-in-psychology
#18
Alyssa Counsell, Lisa L Harlow
With recent focus on the state of research in psychology, it is essential to assess the nature of the statistical methods and analyses used and reported by psychological researchers. To that end, we investigated the prevalence of different statistical procedures and the nature of statistical reporting practices in recent articles from the four major Canadian psychology journals. The majority of authors evaluated their research hypotheses through the use of analysis of variance (ANOVA), t-tests, and multiple regression...
May 2017: Canadian Psychology, Psychologie Canadienne
https://www.readbyqxmd.com/read/28679332/beyond-risk-and-protective-factors-an-adaptation-based-approach-to-resilience
#19
Bruce J Ellis, JeanMarie Bianchi, Vladas Griskevicius, Willem E Frankenhuis
How does repeated or chronic childhood adversity shape social and cognitive abilities? According to the prevailing deficit model, children from high-stress backgrounds are at risk for impairments in learning and behavior, and the intervention goal is to prevent, reduce, or repair the damage. Missing from this deficit approach is an attempt to leverage the unique strengths and abilities that develop in response to high-stress environments. Evolutionary-developmental models emphasize the coherent, functional changes that occur in response to stress over the life course...
July 2017: Perspectives on Psychological Science: a Journal of the Association for Psychological Science
https://www.readbyqxmd.com/read/28659968/the-human-microbiome-and-the-missing-heritability-problem
#20
Santiago Sandoval-Motta, Maximino Aldana, Esperanza Martínez-Romero, Alejandro Frank
The "missing heritability" problem states that genetic variants in Genome-Wide Association Studies (GWAS) cannot completely explain the heritability of complex traits. Traditionally, the heritability of a phenotype is measured through familial studies using twins, siblings and other close relatives, making assumptions on the genetic similarities between them. When this heritability is compared to the one obtained through GWAS for the same traits, a substantial gap between both measurements arise with genome wide studies reporting significantly smaller values...
2017: Frontiers in Genetics
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