keyword
MENU ▼
Read by QxMD icon Read
search

Salamander

keyword
https://www.readbyqxmd.com/read/28814609/tail-regeneration-and-other-phenomena-of-wound-healing-and-tissue-restoration-in-lizards
#1
REVIEW
Kathy Jacyniak, Rebecca P McDonald, Matthew K Vickaryous
Wound healing is a fundamental evolutionary adaptation with two possible outcomes: scar formation or reparative regeneration. Scars participate in re-forming the barrier with the external environment and restoring homeostasis to injured tissues, but are well understood to represent dysfunctional replacements. In contrast, reparative regeneration is a tissue-specific program that near-perfectly replicates that which was lost or damaged. Although regeneration is best known from salamanders (including newts and axolotls) and zebrafish, it is unexpectedly widespread among vertebrates...
August 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28812616/legacy-effects-of-developmental-stages-determine-the-functional-role-of-predators
#2
Volker H W Rudolf, B G Van Allen
Predators are instrumental in structuring natural communities and ecosystem processes. The strong effects of predators are often attributed to their high trophic position in the food web. However, most predators have to grow and move up the food chain before reaching their final trophic position, and during this developmental process their traits, interactions and abundances change. Here, we show that this process of 'moving up' the food chain during development strongly determines the ecological role of a predator...
January 13, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28811310/live-fate-mapping-of-joint-associated-fibroblasts-visualizes-expansion-of-cell-contributions-during-zebrafish-fin-regeneration
#3
Valerie A Tornini, John D Thompson, Raymond L Allen, Kenneth D Poss
The blastema is a mass of progenitor cells responsible for regeneration of amputated salamander limbs and fish fins. Previous studies have indicated that resident cell sources producing the blastema contribute lineage-restricted progeny to regenerating tissue. However, these studies have labeled general cell types rather than granular cell subpopulations, and they do not explain the developmental transitions that must occur for distal structures to arise from cells with proximal identities in the appendage stump...
August 15, 2017: Development
https://www.readbyqxmd.com/read/28806446/sema3a-reduces-sprouting-of-adult-rod-photoreceptors-in-vitro
#4
Frank Kung, Weiwei Wang, Tracy S Tran, Ellen Townes-Anderson
Purpose: Rod photoreceptor terminals respond to retinal injury with retraction and sprouting. Since the guidance cue Semaphorin3A (Sema3A) is observed in the retina after injury, we asked whether Sema3A contributes to structural plasticity in rod photoreceptors. Methods: We used Western blots and alkaline phosphatase (AP)-tagged neuropilin-1 (NPN-1) to detect the expression of Sema3A in an organotypic model of porcine retinal detachment. We then examined Sema3A binding to cultured salamander rod photoreceptors using AP-tagged Sema3A...
August 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28801228/identification-of-the-first-cathelicidin-gene-from-skin-of-chinese-giant-salamanders-andrias-davidianus-with-its-potent-antimicrobial-activity
#5
Hui Yang, Baoyue Lu, Dandan Zhou, Lin Zhao, Weijia Song, Lixin Wang
Cathelicidins, as effector molecules, play important roles against infections and represent a crucial component of the innate immune system in vertebrates. They are widely studied in mammals, but little is known in amphibians. In the present study, we report the identification and characterization of a novel cathelicidin from Chinese giant salamander Andrias davidianus, which is the first study in Caudata amphibian. The cDNA sequence encodes a predicted 148-amino-acid polypeptide, which composed of a 20-residue signal peptide, a 94-residue conserved cathelin domain and a 34-residue mature peptide...
August 9, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28770079/evolutionary-response-to-global-change-climate-and-land-use-interact-to-shape-color-polymorphism-in-a-woodland-salamander
#6
Bradley J Cosentino, Jean-David Moore, Nancy E Karraker, Martin Ouellet, James P Gibbs
Evolutionary change has been demonstrated to occur rapidly in human-modified systems, yet understanding how multiple components of global change interact to affect adaptive evolution remains a critical knowledge gap. Climate change is predicted to impose directional selection on traits to reduce thermal stress, but the strength of directional selection may be mediated by changes in the thermal environment driven by land use. We examined how regional climatic conditions and land use interact to affect genetically based color polymorphism in the eastern red-backed salamander (Plethodon cinereus)...
July 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28757575/vaccination-with-recombinant-baculovirus-expressing-ranavirus-major-capsid-protein-induces-protective-immunity-in-chinese-giant-salamander-andrias-davidianus
#7
Xiaoyuan Zhou, Xinglang Zhang, Yahui Han, Qiuhong Jia, Hongwei Gao
The Chinese giant salamander iridovirus (CGSIV), belonging to the genus Ranavirus in the family Iridoviridae, is the causative agent of an emerging infectious disease causing high mortality of more than 90% and economic losses in Chinese giant salamanders in China. In this study, a recombinant baculovirus-based vaccine expressing the CGSIV major capsid protein (MCP) was developed and its protective immunity in Chinese giant salamanders was evaluated. The recombinant Autographacalifornica nucleopolyhedrosis virus (AcNPV), expressing CGSIV MCP, designated as AcNPV-MCP, was generated with the highest titers of 1 × 10⁸ plaque forming units/mL (PFU/mL) and confirmed by Western blot and indirect immunofluorescence (IIF) assays...
July 25, 2017: Viruses
https://www.readbyqxmd.com/read/28752599/on-the-independent-gene-trees-assumption-in-phylogenomic-studies
#8
W Bryan Jennings
Multilocus coalescent methods for inferring species trees or historical demographic parameters typically require the assumption that gene trees for sampled SNPs or DNA sequence loci are conditionally independent given their species tree. In practice, researchers have used different criteria to delimit "independent loci." One criterion identifies sampled loci as being independent of each other if they undergo Mendelian independent assortment (IA criterion). O'Neill et al. (2013, Molecular Ecology, 22, 111-129) used this approach in their phylogeographic study of North American tiger salamander species complex...
July 28, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28752597/comparative-landscape-genetics-of-pond-breeding-amphibians-in-mediterranean-temporal-wetlands-the-positive-role-of-structural-heterogeneity-in-promoting-gene-flow
#9
J Gutiérrez-Rodríguez, J Gonçalves, E Civantos, I Martínez-Solano
Comparative landscape genetics studies can provide key information to implement cost-effective conservation measures favoring a broad set of taxa. These studies are scarce, particularly in Mediterranean areas, which include diverse but threatened biological communities. Here we focus on Mediterranean wetlands in central Iberia and perform a multi-level, comparative study of two endemic pond-breeding amphibians, a salamander (Pleurodeles waltl) and a toad (Pelobates cultripes). We genotyped 411 salamanders from 20 populations and 306 toads from 16 populations at 18 and 16 microsatellite loci, respectively, and identified major factors associated with population connectivity through the analysis of three sets of variables potentially affecting gene flow at increasingly finer levels of spatial resolution...
July 28, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28751633/chemical-characterization-of-the-adhesive-secretions-of-the-salamander-plethodon-shermani-caudata-plethodontidae
#10
Janek von Byern, Ingo Grunwald, Max Kosok, Ralph A Saporito, Ursula Dicke, Oliver Wetjen, Karsten Thiel, Kai Borcherding, Thomas Kowalik, Martina Marchetti-Deschmann
Salamanders have developed a wide variety of antipredator mechanisms, including tail autotomy, colour patterns, and noxious skin secretions. As an addition to these tactics, the red-legged salamander (Plethodon shermani) uses adhesive secretions as part of its defensive strategy. The high bonding strength, the fast-curing nature, and the composition of the biobased materials makes salamander adhesives interesting for practical applications in the medical sector. To understand the adhesive secretions of P. shermani, its components were chemically analysed by energy dispersive X-ray spectroscopy (EDX), inductively coupled plasma mass spectrometry (ICP-MS), amino acid analysis, and spectroscopy (ATR-IR, Raman)...
July 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28747662/inference-of-neuronal-functional-circuitry-with-spike-triggered-non-negative-matrix-factorization
#11
Jian K Liu, Helene M Schreyer, Arno Onken, Fernando Rozenblit, Mohammad H Khani, Vidhyasankar Krishnamoorthy, Stefano Panzeri, Tim Gollisch
Neurons in sensory systems often pool inputs over arrays of presynaptic cells, giving rise to functional subunits inside a neuron's receptive field. The organization of these subunits provides a signature of the neuron's presynaptic functional connectivity and determines how the neuron integrates sensory stimuli. Here we introduce the method of spike-triggered non-negative matrix factorization for detecting the layout of subunits within a neuron's receptive field. The method only requires the neuron's spiking responses under finely structured sensory stimulation and is therefore applicable to large populations of simultaneously recorded neurons...
July 26, 2017: Nature Communications
https://www.readbyqxmd.com/read/28744203/synaptic-ribbon-active-zones-in-cone-photoreceptors-operate-independently-from-one-another
#12
Justin J Grassmeyer, Wallace B Thoreson
Cone photoreceptors depolarize in darkness to release glutamate-laden synaptic vesicles. Essential to release is the synaptic ribbon, a structure that helps organize active zones by clustering vesicles near proteins that mediate exocytosis, including voltage-gated Ca(2+) channels. Cone terminals have many ribbon-style active zones at which second-order neurons receive input. We asked whether there are functionally significant differences in local Ca(2+) influx among ribbons in individual cones. We combined confocal Ca(2+) imaging to measure Ca(2+) influx at individual ribbons and patch clamp recordings to record whole-cell ICa in salamander cones...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28731800/natural-history-constrains-the-macroevolution-of-foot-morphology-in-european-plethodontid-salamanders
#13
Dean C Adams, Dana Korneisel, Morgan Young, Annamaria Nistri
The natural history of organisms can have major effects on the tempo and mode of evolution, but few examples show how unique natural histories affect rates of evolution at macroevolutionary scales. European plethodontid salamanders (Plethodontidae: Hydromantes) display a particular natural history relative to other members of the family. Hydromantes commonly occupy caves and small crevices, where they cling to the walls and ceilings. On the basis of this unique and strongly selected behavior, we test the prediction that rates of phenotypic evolution will be lower in traits associated with climbing...
August 2017: American Naturalist
https://www.readbyqxmd.com/read/28729494/saving-europe-s-salamanders
#14
Erik Stokstad
No abstract text is available yet for this article.
July 21, 2017: Science
https://www.readbyqxmd.com/read/28716741/inferring-the-shallow-phylogeny-of-true-salamanders-salamandra-by-multiple-phylogenomic-approaches
#15
Ariel Rodríguez, James D Burgon, Mariana Lyra, Iker Irisarri, Denis Baurain, Leon Blaustein, Bayram Göçmen, Sven Künzel, Barbara K Mable, Arne W Nolte, Michael Veith, Sebastian Steinfartz, Kathryn R Elmer, Hervé Philippe, Miguel Vences
The rise of high-throughput sequencing techniques provides the unprecedented opportunity to analyse controversial phylogenetic relationships in great depth, but also introduces a risk of being misinterpreted by high node support values influenced by unevenly distributed missing data or unrealistic model assumptions. Here, we use three largely independent phylogenomic data sets to reconstruct the controversial phylogeny of true salamanders of the genus Salamandra, a group of amphibians providing an intriguing model to study the evolution of aposematism and viviparity...
July 14, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28710876/trunk-elongation-and-ontogenetic-changes-in-the-axial-skeleton-of-triturus-newts
#16
Petar Govedarica, Milena Cvijanović, Maja Slijepčević, Ana Ivanović
Body elongation in vertebrates can be achieved by lengthening of the vertebrae or by an increase in their number. In salamanders, longer bodies are mostly associated with greater numbers of vertebrae in the trunk or tail region. However, studies on the relative contribution of the length of single vertebra to body elongation are lacking. In this study, we focus on evolutionary and ontogenetic changes in differentiation of the trunk vertebrae and the relative contribution of individual vertebrae to trunk lengthening in Triturus newts, a monophyletic group of salamanders that shows remarkable disparity in body shape...
July 15, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28695491/identification-and-characterization-of-the-chinese-giant-salamander-andrias-davidianus-mirnas-by-deep-sequencing-and-predication-of-their-targets
#17
Yong Huang, You Bing Yang, Xiao Chan Gao, Hong Tao Ren, Xi Hong Sun
MicroRNAs (miRNAs) are non-coding small RNA of approximately 22 nt in length. They are considered as key regulators for gene expression at the post-transcriptional level and play an important role in the regulation of many fundamental biological processes. Andrias davidianus, as one of the largest amphibian on earth, may represent the transitional type of animal from aquatic to terrestrial life, but so far, no miRNA has been identified in the species. In this study, Illumina deep sequencing was used for high-throughput analysis of miRNAs in a pooled small RNA library isolated from eight tissues sample of A...
August 2017: 3 Biotech
https://www.readbyqxmd.com/read/28690826/demographics-reproduction-growth-and-abundance-of-jollyville-plateau-salamanders-eurycea-tonkawae
#18
Nathan F Bendik
Insights into the ecology and natural history of the neotenic salamander, Eurycea tonkawae, are provided from eight years of capture-recapture data from 10,041 captures of 7,315 individuals at 16 sites. Eurycea tonkawae exhibits seasonal reproduction, with peak gravidity occurring in the fall and winter. Size frequency data indicated recruitment occurred in the spring and summer. Open-population capture-recapture models revealed a similar seasonal pattern at two of three sites, while recruitment was dependent on flow at the third site...
July 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28690797/the-influence-of-breeding-phenology-on-the-genetic-structure-of-four-pond-breeding-salamanders
#19
Jacob J Burkhart, William E Peterman, Emily R Brocato, Kimberly M Romine, M Madeline S Willis, Brittany H Ousterhout, Thomas L Anderson, Dana L Drake, Freya E Rowland, Raymond D Semlitsch, Lori S Eggert
Understanding metapopulation dynamics requires knowledge about local population dynamics and movement in both space and time. Most genetic metapopulation studies use one or two study species across the same landscape to infer population dynamics; however, using multiple co-occurring species allows for testing of hypotheses related to different life history strategies. We used genetic data to study dispersal, as measured by gene flow, in three ambystomatid salamanders (Ambystoma annulatum, A. maculatum, and A...
July 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28682480/effects-of-host-species-and-environment-on-the-skin-microbiome-of-plethodontid-salamanders
#20
Carly R Muletz Wolz, Stephanie A Yarwood, Evan H Campbell Grant, Robert C Fleischer, Karen R Lips
1.The amphibian skin microbiome is recognized for its role in defense against pathogens, including the deadly fungal pathogen Batrachochytrium dendrobatidis (Bd). Yet, we have little understanding of evolutionary and ecological processes that structure these communities, especially for salamanders and closely related species. We investigated patterns in the distribution of bacterial communities on Plethodon salamander skin across host species and environments. 2.Quantifying salamander skin microbiome structure contributes to our understanding of how host-associated bacteria are distributed across the landscape, among host species, and their putative relationship with disease...
July 6, 2017: Journal of Animal Ecology
keyword
keyword
57269
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"