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https://www.readbyqxmd.com/read/29240975/macroecological-patterns-of-sexual-size-dimorphism-in-turtles-of-the-world
#1
Mickey Agha, Joshua R Ennen, A Justin Nowakowski, Jeffrey E Lovich, Sarah C Sweat, Brian D Todd
Sexual size dimorphism (SSD) is a well-documented phenomenon in both plants and animals; however, the ecological and evolutionary mechanisms that drive and maintain SSD patterns across geographic space at regional and global scales are understudied, especially for reptiles. Our goal was to examine geographic variation of turtle SSD and to explore ecological and environmental correlates using phylogenetic comparative methods. We use published body size data on 135 species from nine turtle families to examine how geographic patterns and the evolution of SSD are influenced by habitat specialization, climate (annual mean temperature and annual precipitation) and climate variability, latitude, or a combination of these predictor variables...
December 14, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/29240929/the-genome-and-adult-somatic-transcriptome-of-the-mormyrid-electric-fish-paramormyrops-kingsleyae
#2
Jason R Gallant, Mauricio Losilla, Chad Tomlinson, Wesley C Warren
Several studies have begun to elucidate the genetic and developmental processes underlying major vertebrate traits. Few of these traits have evolved repeatedly in vertebrates, preventing the analysis of molecular mechanisms underlying these traits comparatively. Electric organs have evolved multiple times among vertebrates, presenting a unique opportunity to understand the degree of constraint and repeatability of the evolutionary processes underlying novel vertebrate traits. As there is now a completed genome sequence representing south american electric eels, we were motivated to obtain genomic sequence from a linage that independently evolved electric organs to facilitate future comparative analyses of the evolution and development of electric organs...
December 12, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/29239145/line-1-retrotransposons-in-healthy-and-diseased-human-brain
#3
REVIEW
Nicole A Suarez, Angela Macia, Alysson R Muotri
Long interspersed element-1 (LINE-1 or L1) is a transposable element with the ability to self-mobilize throughout the human genome. The L1 elements found in the human brain is hypothesized to date back 56 million years ago and has survived evolution, currently accounting for 17% of the human genome. L1 retrotransposition has been theorized to contribute to somatic mosaicism. This review focuses on the presence of L1 in the healthy and diseased human brain, such as in autism spectrum disorders (ASD). Throughout this exploration, we will discuss the impact L1 has on neurological disorders that can occur throughout the human lifetime...
December 14, 2017: Developmental Neurobiology
https://www.readbyqxmd.com/read/29238527/ancestrality-and-evolution-of-trait-syndromes-in-finches-fringillidae
#4
Jean-François Ponge, Dario Zuccon, Marianne Elias, Sandrine Pavoine, Pierre-Yves Henry, Marc Théry, Éric Guilbert
Species traits have been hypothesized by one of us (Ponge, 2013) to evolve in a correlated manner as species colonize stable, undisturbed habitats, shifting from "ancestral" to "derived" strategies. We predicted that generalism, r-selection, sexual monomorphism, and migration/gregariousness are the ancestral states (collectively called strategy A) and evolved correlatively toward specialism, K-selection, sexual dimorphism, and residence/territoriality as habitat stabilized (collectively called B strategy). We analyzed the correlated evolution of four syndromes, summarizing the covariation between 53 traits, respectively, involved in ecological specialization, r-K gradient, sexual selection, and dispersal/social behaviors in 81 species representative of Fringillidae, a bird family with available natural history information and that shows variability for all these traits...
December 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/29238183/gene-and-mirna-expression-profiles-in-pbmcs-from-patients-with-severe-and-mild-emphysema-and-pizz-alpha1-antitrypsin-deficiency
#5
Cristina Esquinas, Sabina Janciauskiene, Ricardo Gonzalo, Gemma Mas de Xaxars, Beata Olejnicka, Irene Belmonte, Miriam Barrecheguren, Esther Rodriguez, Alexa Nuñez, Francisco Rodriguez-Frias, Marc Miravitlles
Introduction: COPD has complex etiologies involving both genetic and environmental determinants. Among genetic determinants, the most recognized is a severe PiZZ (Glu342Lys) inherited alpha1-antitrypsin deficiency (AATD). Nonetheless, AATD patients present a heterogeneous clinical evolution, which has not been completely explained by sociodemographic or clinical factors. Here we performed the gene expression profiling of blood cells collected from mild and severe COPD patients with PiZZ AATD...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/29238078/the-genetic-architecture-of-ecological-adaptation-intraspecific-variation-in-host-plant-use-by-the-lepidopteran-crop-pest-chloridea-virescens
#6
Sara J Oppenheim, Fred Gould, Keith R Hopper
Intraspecific variation in ecologically important traits is a cornerstone of Darwin's theory of evolution by natural selection. The evolution and maintenance of this variation depends on genetic architecture, which in turn determines responses to natural selection. Some models suggest that traits with complex architectures are less likely to respond to selection than those with simple architectures, yet rapid divergence has been observed in such traits. The simultaneous evolutionary lability and genetic complexity of host plant use in the Lepidopteran subfamily Heliothinae suggest that architecture may not constrain ecological adaptation in this group...
December 14, 2017: Heredity
https://www.readbyqxmd.com/read/29237841/mammalian-adaptation-of-an-avian-influenza-a-virus-involves-stepwise-changes-in-ns1
#7
C Chauché, A Nogales, H Zhu, D Goldfarb, A I Ahmad Shanizza, Q Gu, C R Parrish, L Martínez-Sobrido, J F Marshall, P R Murcia
Influenza A viruses (IAVs) are common pathogens of birds that occasionally establish endemic infections in mammals. The processes and mechanisms that result in IAV mammalian adaptation are poorly understood. The viral non-structural 1 (NS1) protein counteracts the interferon (IFN) response, a central component of the host-species barrier.We characterised the NS1 proteins of equine influenza virus (EIV), a mammalian IAV lineage of avian origin. We showed that evolutionary distinct NS1s counteract the IFN response using different and mutually exclusive mechanisms: while the NS1s of early EIVs block general gene expression by binding to the cellular polyadenylation specific factor 30 (CPSF30), NS1s from more evolved EIVs specifically block the induction of IFN-stimulated genes by interfering with the JAK/STAT pathway...
December 13, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29236826/hereditary-spastic-paraplegia-from-1880-to-2017-an-historical-review
#8
Ingrid Faber, Eduardo Rafael Pereira, Alberto R M Martinez, Marcondes França, Hélio Afonso Ghizoni Teive
The authors have constructed a brief timeline of major clinical research related to hereditary spastic paraplegia (HSP). This timeline summarizes the evolution of HSP research, from the first clinical descriptions by Adolf von Strümpell in 1880 to the present day, with the transformation of these diseases into a rapidly-growing and heterogeneous group of neurogenetic diseases.
November 2017: Arquivos de Neuro-psiquiatria
https://www.readbyqxmd.com/read/29235732/weed-resistance-to-synthetic-auxin-herbicides
#9
REVIEW
Roberto Busi, Danica E Goggin, Ian Heap, Michael J Horak, Mithila Jugulam, Robert A Masters, Richard Napier, Dilpreet S Riar, Norbert M Satchivi, Joel Torra, Phillip Westra, Terry R Wright
Herbicides classified as synthetic auxins have been most commonly used to control broadleaf weeds in a variety of crops and in non-cropland areas since the first synthetic auxin herbicide (SAH), 2,4-D, was introduced to the market in the mid-1940s. The incidence of weed species resistant to SAHs is relatively low considering their long-term global application with 29 broadleaf weed species confirmed resistant to date. An understanding of the context and mechanisms of SAH resistance evolution can inform management practices to sustain the longevity and utility of this important class of herbicides...
December 13, 2017: Pest Management Science
https://www.readbyqxmd.com/read/29234345/a-new-ala-122-asn-amino-acid-change-confers-decreased-fitness-to-als-resistant-echinochloa-crus-galli
#10
Silvia Panozzo, Laura Scarabel, Valentina Rosan, Maurizio Sattin
Gene mutations conferring herbicide resistance may cause pleiotropic effects on plant fitness. Knowledge of these effects is important for managing the evolution of herbicide-resistant weeds. An Echinochloa crus-galli population resistant to acetolactate synthase (ALS) herbicides was collected in a maize field in north-eastern Italy and the cross-resistance pattern, resistance mechanism and fitness costs associated to mutant-resistant plants under field conditions in the presence or absence of intra-specific competition were determined...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29233985/mating-system-manipulation-and-the-evolution-of-sex-biased-gene-expression-in-drosophila
#11
Paris Veltsos, Yongxiang Fang, Andrew R Cossins, Rhonda R Snook, Michael G Ritchie
Sex differences in dioecious animals are pervasive and result from gene expression differences. Elevated sexual selection has been predicted to increase the number and expression of male-biased genes, and experimentally imposing monogamy on Drosophila melanogaster has led to a relative feminisation of the transcriptome. Here, we test this hypothesis further by subjecting another polyandrous species, D. pseudoobscura, to 150 generations of experimental monogamy or elevated polyandry. We find that sex-biased genes do change in expression but, contrary to predictions, there is usually masculinisation of the transcriptome under monogamy, although this depends on tissue and sex...
December 12, 2017: Nature Communications
https://www.readbyqxmd.com/read/29233973/parasitised-feathered-dinosaurs-as-revealed-by-cretaceous-amber-assemblages
#12
Enrique Peñalver, Antonio Arillo, Xavier Delclòs, David Peris, David A Grimaldi, Scott R Anderson, Paul C Nascimbene, Ricardo Pérez-de la Fuente
Ticks are currently among the most prevalent blood-feeding ectoparasites, but their feeding habits and hosts in deep time have long remained speculative. Here, we report direct and indirect evidence in 99 million-year-old Cretaceous amber showing that hard ticks and ticks of the extinct new family Deinocrotonidae fed on blood from feathered dinosaurs, non-avialan or avialan excluding crown-group birds. A †Cornupalpatum burmanicum hard tick is entangled in a pennaceous feather. Two deinocrotonids described as †Deinocroton draculi gen...
December 12, 2017: Nature Communications
https://www.readbyqxmd.com/read/29233963/a-paleocene-penguin-from-new-zealand-substantiates-multiple-origins-of-gigantism-in-fossil-sphenisciformes
#13
Gerald Mayr, R Paul Scofield, Vanesa L De Pietri, Alan J D Tennyson
One of the notable features of penguin evolution is the occurrence of very large species in the early Cenozoic, whose body size greatly exceeded that of the largest extant penguins. Here we describe a new giant species from the late Paleocene of New Zealand that documents the very early evolution of large body size in penguins. Kumimanu biceae, n. gen. et sp. is larger than all other fossil penguins that have substantial skeletal portions preserved. Several plesiomorphic features place the new species outside a clade including all post-Paleocene giant penguins...
December 12, 2017: Nature Communications
https://www.readbyqxmd.com/read/29233940/reply-to-liu-inflammation-before-implantation-both-in-evolution-and-development
#14
Oliver W Griffith, Arun R Chavan, Stella Protopapas, Jamie Maziarz, Roberto Romero, Günter P Wagner
No abstract text is available yet for this article.
December 12, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29233572/hospitalization-of-hiv-positive-patients-significant-demand-affecting-all-hospital-sectors
#15
R Seng, P Mutuon, J Riou, C Duvivier, L Weiss, J D Lelievre, L Meyer, D Vittecoq, O Zak Dit Zbar, J Frenkiel, M Frank-Soltysiak, F Boue, C Rapp, A Sobel, G Brucker, C Goujard, D Salmon
BACKGROUND: In a context of the evolution of severe morbidities in patients living with HIV (PLWH), the aim of this study was to describe reasons for hospitalization and the mode of care for the patients requiring hospitalization. METHODS: All admissions (≥24h) of PLWH to 10 hospitals in the south of Paris (COREVIH Ile-de-France Sud) between 1/1/2011 and 12/31/2011 were identified. The hospital database and the file of patients followed in the HIV referral department of each hospital were matched...
December 9, 2017: Revue D'épidémiologie et de Santé Publique
https://www.readbyqxmd.com/read/29232712/bioinformatic-analysis-reveals-new-determinants-of-antigenic-14-3-3-proteins-and-a-novel-antifungal-strategy
#16
Jenna E McGowan, Jacqueline Kratch, Saurabh Chattopadhyay, Bina Joe, Heather R Conti, Ritu Chakravarti
The ubiquitously expressed 14-3-3 family of proteins is evolutionarily conserved from yeast to mammals. Their involvement in humoral and cellular immune responses is emerging through studies in drosophila and humans. In humans, a select group of 14-3-3 isoforms are antigenic; however the determinants of their antigenicity are not known. Here, we show that although mammalian 14-3-3 proteins are mostly conserved, subtle differences between their isoforms may give rise to their antigenicity. We observed syntenic relations among all the isoforms of 14-3-3 for mammals, but not with that of birds or amphibians...
2017: PloS One
https://www.readbyqxmd.com/read/29232521/an-immunoglobulin-fc-fused-peptide-without-c-terminal-arg-or-lys-residue-augments-neuropilin-1-dependent-tumor-vascular-permeability
#17
Du-San Baek, Jeong-Ho Kim, Ye-Jin Kim, Yong-Sung Kim
Neuropilin-1 (NRP1), which functions as a co-receptor for vascular endothelial growth factor (VEGF) and is implicated in vascular permeability and tumorigenesis, has been targeted by peptides that specifically bind to the VEGF-binding region on NRP1. Like natural VEGF ligands, all known peptides with NRP1-binding activity bind only through a carboxy (C)-terminal R/K-x-x-R/K sequence motif (x stands for any amino acids); this strict requirement is called the C-end rule (CendR). Here, we report immunoglobulin Fc-fused NRP1-specific peptides deviating from CendR...
December 12, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29232125/structural-and-computational-insight-into-the-catalytic-mechanism-of-limonene-epoxide-hydrolase-mutants-in-stereoselective-transformations
#18
Zhoutong Sun, Lian Wu, Marco Bocola, H C Stephen Chan, Richard Lonsdale, Xu-Dong Kong, Shuguang Yuan, Jiahai Zhou, Manfred T Reetz
Directed evolution of limonene epoxide hydrolase (LEH), which catalyzes the hydrolytic desymmetrization reactions of cyclopentene oxide and cyclohexene oxide, results in (R,R)- and (S,S)-selective mutants. Their crystal structures combined with extensive theoretical computations shed light on the mechanistic intricacies of this widely used enzyme. From the computed activation energies of various pathways, we discover the underlying stereochemistry for favorable reactions. Surprisingly, some of the most enantioselective mutants that rapidly convert cyclohexene oxide do not catalyze the analogous transformation of the structurally similar cyclopentene oxide, as shown by additional X-ray structures of the variants harboring this slightly smaller substrate...
December 12, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29230921/global-grass-poaceae-success-underpinned-by-traits-facilitating-colonization-persistence-and-habitat-transformation
#19
H P Linder, Caroline E R Lehmann, Sally Archibald, Colin P Osborne, David M Richardson
Poaceae (the grasses) is arguably the most successful plant family, in terms of its global occurrence in (almost) all ecosystems with angiosperms, its ecological dominance in many ecosystems, and high species richness. We suggest that the success of grasses is best understood in context of their capacity to colonize, persist, and transform environments (the "Viking syndrome"). This results from combining effective long-distance dispersal, efficacious establishment biology, ecological flexibility, resilience to disturbance and the capacity to modify environments by changing the nature of fire and mammalian herbivory...
December 12, 2017: Biological Reviews of the Cambridge Philosophical Society
https://www.readbyqxmd.com/read/29230818/relationship-between-carbohydrate-composition-and-fungal-deterioration-of-functional-strawberry-juices-preserved-using-non-thermal-treatments
#20
Lucía Cassani, Gabriel Quintana, María R Moreira, Andrea Gómez-Zavaglia
BACKGROUND: The quantification of the main carbohydrates present in strawberry juices enriched with inulin and fructo-oligosaccharides (FOS) and preserved by non-thermal techniques (vanillin and ultrasound) were studied, as well as the evolution of these compounds and their relationship with fungal deterioration during 14 days of refrigerated storage. RESULTS: A simple and environmentally friendly analytical approach based on high performance liquid chromatography with reflection index detector was developed for simultaneous determination of inulin, FOS and mono and disaccharides present in the juices...
December 12, 2017: Journal of the Science of Food and Agriculture
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