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https://www.readbyqxmd.com/read/28821812/crows-rival-monkeys-in-cognitive-capacity
#1
Dmitry Balakhonov, Jonas Rose
The present study compares the 'bandwidth of cognition' between crows and primates. Working memory is the ability to maintain and manipulate information over short periods of time - a core component of cognition. The capacity of working memory is tightly limited, in humans correlated with individual intelligence and commonly used synonymously with cognitive capacity. Crows have remarkable cognitive skills and while birds and mammals share neural principles of working memory, its capacity has not been tested in crows...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821712/emergence-of-recombinant-mayaro-virus-strains-from-the-amazon-basin
#2
Carla Mavian, Brittany D Rife, James Jarad Dollar, Eleonora Cella, Massimo Ciccozzi, Mattia C F Prosperi, John Lednicky, J Glenn Morris, Ilaria Capua, Marco Salemi
Mayaro virus (MAYV), causative agent of Mayaro Fever, is an arbovirus transmitted by Haemagogus mosquitoes. Despite recent attention due to the identification of several cases in South and Central America and the Caribbean, limited information on MAYV evolution and epidemiology exists and represents a barrier to prevention of further spread. We present a thorough spatiotemporal evolutionary study of MAYV full-genome sequences collected over the last sixty years within South America and Haiti, revealing recent recombination events and adaptation to a broad host and vector range, including Aedes mosquito species...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821592/global-analysis-of-gene-expression-in-response-to-whole-chromosome-aneuploidy-in-hexaploid-wheat
#3
Ai Zhang, Ning Li, Lei Gong, Xiaowan Gou, Bin Wang, Xin Deng, Changping Li, Qianli Dong, Huakun Zhang, Bao Liu
Aneuploidy, a condition of unbalanced chromosome content, represents a large-effect mutation that bears significant relevancy to human health and microbe adaptation. As such, extensive studies of aneuploidy have been conducted in unicellular model organisms and cancer cells. Aneuploidy also frequently is associated with plant polyploidization, but its impact on gene expression and relevance to polyploid genome evolution/functional innovation remain largely unknown. Here, we used a panel of diverse types of whole-chromosome aneuploidy of hexaploid wheat, all under the common genetic background of cv...
August 18, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28820908/ribosomopathy-like-properties-of-murine-and-human-cancers
#4
Sucheta Kulkarni, James M Dolezal, Huabo Wang, Laura Jackson, Jie Lu, Brian P Frodey, Atinuke Dosunmu-Ogunbi, Youjun Li, Marc Fromherz, Audry Kang, Lucas Santana-Santos, Panayiotis V Benos, Edward V Prochownik
Ribosomopathies comprise a heterogeneous group of hematologic and developmental disorders, often characterized by bone marrow failure, skeletal and other developmental abnormalities and cancer predisposition. They are associated with mutations and/or haplo-insufficiencies of ribosomal proteins (RPs) and inefficient ribosomal RNA (rRNA) processing. The resulting ribosomal stress induces the canonical p19ARF/Mdm2/p53 tumor suppressor pathway leading to proliferative arrest and/or apoptosis. It has been proposed that this pathway is then inactivated during subsequent neoplastic evolution...
2017: PloS One
https://www.readbyqxmd.com/read/28819830/identification-and-characterization-of-tyrosine-kinases-in-anole-lizard-indicate-the-conserved-tyrosine-kinase-repertoire-in-vertebrates
#5
Ake Liu, Funan He, Xun Gu
The tyrosine kinases (TKs) play principal roles in regulation of multicellular aspects of the organism and are implicated in many cancer types and congenital disorders. The anole lizard has recently been introduced as a model organism for laboratory-based studies of organismal function and field studies of ecology and evolution. However, the TK family of anole lizard has not been systematically identified and characterized yet. In this study, we identified 82 TK-encoding genes in the anole lizard genome and classified them into 28 subfamilies through phylogenetic analysis, with no member from ROS and STYK1 subfamilies identified...
August 17, 2017: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/28819206/network-robustness-assessed-within-a-dual-connectivity-framework-joint-dynamics-of-the-active-and-idle-networks
#6
Alejandro Tejedor, Anthony Longjas, Ilya Zaliapin, Samuel Ambroj, Efi Foufoula-Georgiou
Network robustness against attacks has been widely studied in fields as diverse as the Internet, power grids and human societies. But current definition of robustness is only accounting for half of the story: the connectivity of the nodes unaffected by the attack. Here we propose a new framework to assess network robustness, wherein the connectivity of the affected nodes is also taken into consideration, acknowledging that it plays a crucial role in properly evaluating the overall network robustness in terms of its future recovery from the attack...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819183/distribution-bias-and-biochemical-characterization-of-top1mt-single-nucleotide-variants
#7
Hongliang Zhang, Yeonee Seol, Keli Agama, Keir C Neuman, Yves Pommier
Mitochondrial topoisomerase I (TOP1MT) is a type IB topoisomerase encoded in the nucleus of vertebrate cells. In contrast to the other five human topoisomerases, TOP1MT possesses two high frequency single nucleotide variants (SNVs), rs11544484 (V256I, Minor Allele Frequency = 0.27) and rs2293925 (R525W, MAF = 0.45), which tend to be mutually exclusive across different human ethnic groups and even more clearly in a cohort of 129 US patients with breast cancer and in the NCI-60 cancer cell lines. We expressed these two TOP1MT variants and the double-variant (V256I-R525W) as recombinant proteins, as well as a less common variant E168G (rs200673353, MAF = 0...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28818557/dna-aptamer-identification-and-characterization-for-e-coli-o157-detection-using-cell-based-selex-method
#8
Masoum Amraee, Mana Oloomi, Afsaneh Yavari, Saeid Bouzari
Escherichia coli (E. coli) O157:H7 is a foodborne pathogen that causes symptoms in humans. Its rapid identification should be considered to avoid toxic effects of the pathogen. In this study, systematic evolution of ligands by exponential enrichment using whole cells (Cell-SELEX) method was used for recognizing E. coli strain, O157 by single-stranded DNA library of aptamer. Nine rounds of cell-selex procedure were applied using O157, as a whole-cell target, with O42, K12, Top10, DH5α E. coli cells, Shigella flexneri and Salmonella typhi as counterparts...
August 14, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/28818268/-metformin-resistant-folic-acid-producing-probiotics-or-folic-acid-against-metformin-s-adverse-effects-like-diarrhea
#9
Abdullah Olgun
Metformin, first line medication in the treatment of type2 diabetes by millions of patients worldwide, causes gastrointestinal adverse effects (i.e. diarrhea) in approximately 30% of patients, frequently leading to discontinuation. Interestingly, metformin was reported to increase life span in a microscopic worm, Caenorhabditis elegans, by decreasing folate and methionine production of bacteria that this worm uses as a food source. Metformin can be expected to have a similar effect on some microorganisms of human gut microbiota...
September 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28817957/case-report-of-onychomycosis-and-tinea-corporis-due-to-microsporum-gypseum
#10
Jesse M Fike, Ramya Kollipara, Suzanne Alkul, Cloyce L Stetson
BACKGROUND: Microsporum gypseum is a geophilic dermatophyte that colonises keratinous substances in the soil. Fur-bearing animals carry this dermatophyte but are rarely infected. Human infection can be acquired from the soil, carrier or infected animals, and rarely other humans. M gypseum is an uncommon cause of cutaneous infection in humans and typically manifests as tinea corporis, tinea barbae, and tinea capitis. Onychomycosis is rarely caused by M gypseum. CASE SUMMARY: We present a case of a 32-year-old white man who presented with a red scaly rash and nail dystrophy after adopting a pet rat 10 years prior to presentation...
August 1, 2017: Journal of Cutaneous Medicine and Surgery
https://www.readbyqxmd.com/read/28817647/caprine-brucellosis-a-historically-neglected-disease-with-significant-impact-on-public-health
#11
REVIEW
Carlos A Rossetti, Angela M Arenas-Gamboa, Estefanía Maurizio
Caprine brucellosis is a chronic infectious disease caused by the gram-negative cocci-bacillus Brucella melitensis. Middle- to late-term abortion, stillbirths, and the delivery of weak offspring are the characteristic clinical signs of the disease that is associated with an extensive negative impact in a flock's productivity. B. melitensis is also the most virulent Brucella species for humans, responsible for a severely debilitating and disabling illness that results in high morbidity with intermittent fever, chills, sweats, weakness, myalgia, abortion, osteoarticular complications, endocarditis, depression, anorexia, and low mortality...
August 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28816480/superior-olfactory-language-and-cognition-in-odor-color-synaesthesia
#12
Laura J Speed, Asifa Majid
Olfaction is often considered a vestigial sense in humans, demoted throughout evolution to make way for the dominant sense of vision. This perspective on olfaction is reflected in how we think and talk about smells in the West, with odor imagery and odor language reported to be difficult. In the present study we demonstrate odor cognition is superior in odor-color synaesthesia, where there are additional sensory connections to odor concepts. Synaesthesia is a neurological phenomenon in which input in 1 modality leads to involuntary perceptual associations...
August 17, 2017: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/28815964/sex-biased-dispersal-of-human-ancestors
#13
Yukimaru Sugiyama
Some anthropologists and primatologists have argued that, judging by extant chimpanzees and humans, which are female-biased dispersers, the common ancestors of humans and chimpanzees were also female-biased dispersers. It has been thought that sex-biased dispersal patterns have been genetically transmitted for millions of years. However, this character has changed many times with changes in environment and life-form during human evolution and historical times. I examined life-form and social organization of nonhuman primates, among them gatherers (foragers), hunter-gatherers, agriculturalists, industrialists, and modern and extant humans...
July 2017: Evolutionary Anthropology
https://www.readbyqxmd.com/read/28815535/history-discovery-and-classification-of-lncrnas
#14
Julien Jarroux, Antonin Morillon, Marina Pinskaya
The RNA World Hypothesis suggests that prebiotic life revolved around RNA instead of DNA and proteins. Although modern cells have changed significantly in 4 billion years, RNA has maintained its central role in cell biology. Since the discovery of DNA at the end of the nineteenth century, RNA has been extensively studied. Many discoveries such as housekeeping RNAs (rRNA, tRNA, etc.) supported the messenger RNA model that is the pillar of the central dogma of molecular biology, which was first devised in the late 1950s...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28815102/clinical-trials-gov-a-topical-analyses
#15
Vibha Anand, Amos Cahan, Soumya Ghosh
ClinicalTrials.gov was established as a web-based registry for clinical trials of human participants in 2000. Mandatory registration started in 2008. Given more than a decade of registered trials, it's important to understand the "topic" areas and their evolution over time from this resource. This information may help in identifying current knowledge gaps. We use dynamic topic model (DTM) methods to discover topics and their evolution over last 17 years. Our model suggests that there are disease or organ specific trials such as 'Cardiovascular disorders', Heart & Brain conditions', or 'Breast & Prostate cancer' as well as trials registered for general health...
2017: AMIA Summits on Translational Science Proceedings
https://www.readbyqxmd.com/read/28814614/role-of-inactivity-in-chronic-diseases-evolutionary-insight-and-pathophysiological-mechanisms
#16
REVIEW
Frank W Booth, Christian K Roberts, John P Thyfault, Gregory N Ruegsegger, Ryan G Toedebusch
This review proposes that physical inactivity could be considered a behavior selected by evolution for resting, and also selected to be reinforcing in life-threatening situations in which exercise would be dangerous. Underlying the notion are human twin studies and animal selective breeding studies, both of which provide indirect evidence for the existence of genes for physical inactivity. Approximately 86% of the 325 million in the United States (U.S.) population achieve less than the U.S. Government and World Health Organization guidelines for daily physical activity for health...
October 1, 2017: Physiological Reviews
https://www.readbyqxmd.com/read/28814606/their-loss-is-our-gain-regressive-evolution-in-vertebrates-provides-genomic-models-for-uncovering-human-disease-loci
#17
REVIEW
Christopher A Emerling, Andrew D Widjaja, Nancy N Nguyen, Mark S Springer
Throughout Earth's history, evolution's numerous natural 'experiments' have resulted in a diverse range of phenotypes. Though de novo phenotypes receive widespread attention, degeneration of traits inherited from an ancestor is a very common, yet frequently neglected, evolutionary path. The latter phenomenon, known as regressive evolution, often results in vertebrates with phenotypes that mimic inherited disease states in humans. Regressive evolution of anatomical and/or physiological traits is typically accompanied by inactivating mutations underlying these traits, which frequently occur at loci identical to those implicated in human diseases...
August 16, 2017: Journal of Medical Genetics
https://www.readbyqxmd.com/read/28814525/structure-guided-functional-annotation-of-the-influenza-a-virus-ns1-protein-reveals-dynamic-evolution-of-the-p85%C3%AE-binding-site-during-circulation-in-humans
#18
Antonio M Lopes, Patricia Domingues, Roland Zell, Benjamin G Hale
Rational characterization of virulence and host-adaptive markers in the multifunctional influenza A virus NS1 protein is hindered by a lack of comprehensive knowledge about NS1-host protein-protein interfaces. Here, we surveyed the impact of amino-acid variation in NS1 at its structurally-defined binding site for host p85β, a regulator of phosphoinositide-3 kinase (PI3K) signaling. Structure-guided alanine-scanning of all viral residues at this interface defined 10 positions contributing to the interaction, with residues 89, 95, 98, 133, 145 and 162 being most important...
August 16, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28814516/baculovirus-molecular-evolution-via-gene-turnover-and-recurrent-positive-selection-of-key-genes
#19
Tom Hill, Robert L Unckless
Hosts and viruses are locked in an evolutionary arms race. Hosts are constantly evolving to suppress virulence and replication, while viruses, reliant on host machinery for survival and reproduction, develop counter-strategies to escape this immune defense. Viruses must also adapt to novel conditions when establishing themselves in a host species. Both processes provide strong selection for viral adaptation. Understanding adaptive evolution in insect viruses can help us better understand adaptive evolution in general, and is important due to their use as biocontrol agents, and for protecting ecologically or economically important species from outbreaks...
August 16, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28813252/oxytocin-a-parenting-hormone
#20
REVIEW
Ruth Feldman, Marian J Bakermans-Kranenburg
In non-human mammals mothering is hormone-dependent, with crucial roles for oxytocin and prolactin. While human parenting is not hormone-dependent, hormonal changes in oxytocin, vasopressin, prolactin, testosterone, and cortisol prime and accompany the expression of parenting. In the following we focus on oxytocin (OT) as a key hormone in human parenting. OT is a nine-amino-acid neuropeptide hormone which evolved from the ancient vasotocin molecule approximately 650 MYO. OT is implicated in sociality across vertebrate evolution and substantial research has pinpointed its role in birth, lactation, and maternal care in mammals...
June 2017: Current Opinion in Psychology
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