keyword
MENU ▼
Read by QxMD icon Read
search

aestivation

keyword
https://www.readbyqxmd.com/read/28444212/numerical-response-and-impact-of-laricobius-nigrinus-coleoptera-derodontidae-on-adelges-tsugae-hemiptera-adelgidae-in-their-native-range
#1
D L Mausel, L T Kok, S M Salom
To determine if key attributes for a successful biological control agent are possessed by the predator, Laricobius nigrinus Fender, field studies were conducted in its native range of Seattle, WA. The relationship between adult and immature L. nigrinus abundance to different densities of its prey, Adelges tsugae Annand, were determined. In a second study, predator and prey densities, and survivorship of each sistens A. tsugae stage were determined to gauge the impact of predation. The predator strongly aggregated and increased its reproduction when prey density increased, the two mechanisms of a numerical response...
June 1, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/28398155/seasonal-patterns-of-variation-in-steroid-plasma-levels-and-immune-parameters-in-anurans-from-brazilian-semiarid-area
#2
Carla Bonetti Madelaire, Inna Sokolova, Fernando Ribeiro Gomes
Elevated androgens and glucocorticoids displayed by males during the reproductive season have been proposed to mediate a possible trade-off between reproduction and immunocompetence. Anurans living in arid and semiarid environments display a strong seasonal reproduction, which could accentuate the variation in physiological, immunological, and behavioral parameters. We studied covariation between steroid plasma levels, morphometric variables associated with body condition and immunity, leukocyte profile, parasite load, and response to an immunological challenge across different phases of the annual life-history cycle of three anuran species from a Brazilian semiarid area...
July 2017: Physiological and Biochemical Zoology: PBZ
https://www.readbyqxmd.com/read/28340627/the-contribution-of-dietary-restriction-to-extended-longevity-in-the-malaria-vector-anopheles-coluzzii
#3
Roy Faiman, Samantha Solon-Biet, Margery Sullivan, Diana L Huestis, Tovi Lehmann
BACKGROUND: Variation in longevity has long been of interest in vector biology because of its implication in disease transmission through vectorial capacity. Recent studies suggest that Anopheles coluzzii adults persist during the ~7 month dry season via aestivation. Recently there has been a growing body of evidence linking dietary restriction and low ratio of dietary protein to carbohydrate with extended longevity of animals. Here, we evaluated the effects of dietary restriction and the protein : carbohydrate ratio on longevity of An...
March 24, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28261105/aestivation-induces-changes-in-the-mrna-expression-levels-and-protein-abundance-of-two-isoforms-of-urea-transporters-in-the-gills-of-the-african-lungfish-protopterus-annectens
#4
You R Chng, Jasmine L Y Ong, Biyun Ching, Xiu L Chen, Kum C Hiong, Wai P Wong, Shit F Chew, Siew H Lam, Yuen K Ip
The African lungfish, Protopterus annectens, is ammonotelic in water despite being ureogenic. When it aestivates in mucus cocoon on land, ammonia is detoxified to urea. During the maintenance phase of aestivation, urea accumulates in the body, which is subsequently excreted upon arousal. Urea excretion involves urea transporters (UT/Ut). This study aimed to clone and sequence the ut isoforms from the gills of P. annectens, and to test the hypothesis that the mRNA and/or protein expression levels of ut/Ut isoforms could vary in the gills of P...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28216392/nitrergic-cardiovascular-regulation-in-the-african-lungfish-protopterus-aethiopicus
#5
Renato Filogonio, William Joyce, Tobias Wang
As a ubiquitous signaling molecule, nitric oxide (NO) exerts various important effects on the cardiovascular system and is involved in the regulation of vascular tone and myocardial metabolism in vertebrates. Lungfishes are closely related to tetrapods and provide an interesting possibility to understand the transition from water to land. Lungfishes are endowed with both systemic and pulmonary circulations, and their incompletely divided ventricle allows for blood to bypass either circuit. Lungfishes inhabit ephemeral waterbodies that may enforce prolonged aestivation during drought, throughout which nitric oxide synthase (NOS) expression is upregulated...
February 17, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/28184997/molecular-characterization-of-myostatin-from-the-skeletal-muscle-of-the-african-lungfish-protopterus-annectens-and-changes-in-its-mrna-and-protein-expression-levels-during-three-phases-of-aestivation
#6
Jasmine L Y Ong, You R Chng, Biyun Ching, Xiu L Chen, Kum C Hiong, Wai P Wong, Shit F Chew, Yuen K Ip
African lungfishes can aestivate and remain torpid without food and water for years, but disuse muscle atrophy is not prominent during aestivation. This study aimed to clone myostatin (mstn/Mstn), a factor associated with disuse muscle atrophy in mammals, from the skeletal muscle of the African lungfish Protopterus annectens, and to determine its mRNA expression level and protein abundance therein during the induction, maintenance, and arousal phases of aestivation. The complete coding cDNA sequence of mstn comprised 1128 bp, encoding for 376 amino acids with an estimated molecular mass of 42...
February 9, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28059140/identification-and-functional-characterisation-of-5-ht4-receptor-in-sea-cucumber-apostichopus-japonicus-selenka
#7
Tianming Wang, Zhen Yang, Naiming Zhou, Lina Sun, Zhenming Lv, Changwen Wu
Serotonin (5-HT) is an important neurotransmitter and neuromodulator that controls a variety of sensory and motor functions through 5-HT receptors (5-HTRs). The 5-HT4R subfamily is linked to Gs proteins, which activate adenylyl cyclases (ACs), and is involved in many responses in peripheral organs. In this study, the 5-HT4R from Apostichopus japonicus (Aj5-HT4R) was identified and characterised. The cloned full-length Aj5-HT4R cDNA is 1,544 bp long and contains an open reading frame 1,011 bp in length encoding 336 amino acid proteins...
January 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28025284/flower-development-of-goniorrhachis-marginata-reveals-new-insights-into-the-evolution-of-the-florally-diverse-detarioid-legumes
#8
Gerhard Prenner, Domingos Cardoso
BACKGROUND AND AIMS: The study of floral morphology and ontogeny and the re-investigation of existing data help to uncover potential synapomorphic characters and foster our understanding of phylogenetic relationships that rely primarily on molecular analyses. Goniorrhachis marginata is a monotypic caesalpinioid legume (Leguminosae) that shows some interesting floral features, such as a long hypanthium and regular Rosaceae-like flowers. We studied the ontogeny and morphology of the flowers in detail and present our results in a broad phylogenetic context...
February 2017: Annals of Botany
https://www.readbyqxmd.com/read/27891097/molecular-characterization-of-aquaporin-1-and-aquaporin-3-from-the-gills-of-the-african-lungfish-protopterus-annectens-and-changes-in-their-branchial-mrna-expression-levels-and-protein-abundance-during-three-phases-of-aestivation
#9
You R Chng, Jasmine L Y Ong, Biyun Ching, Xiu L Chen, Kum C Hiong, Wai P Wong, Shit F Chew, Siew H Lam, Yuen K Ip
African lungfishes can undergo long periods of aestivation on land during drought. During aestivation, lungfishes are confronted with desiccation and dehydration, and their gills become non-functional and covered with a thick layer of dried mucus. Aquaporins (Aqps) are a superfamily of integral membrane proteins which generally facilitate the permeation of water through plasma membranes. This study aimed to obtain the complete cDNA coding sequences of aqp1 and aqp3 from the gills of Protopterus annectens, and to determine their branchial mRNA and protein expression levels during the induction, maintenance and arousal phases of aestivation...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27806730/comparative-physiological-plasticity-to-desiccation-in-distinct-populations-of-the-malarial-mosquito-anopheles-coluzzii
#10
K Hidalgo, D Siaussat, V Braman, K R Dabiré, F Simard, K Mouline, D Renault
BACKGROUND: In West Africa, populations of the malaria vector mosquito, Anopheles coluzzii, are seasonally exposed to strong desiccating conditions during the dry season. Their dynamics strictly follows the pace of the availability of suitable larval development sites (water collections). Accordingly, mosquitoes can reproduce all year long where permanent breeding is possible, or stop reproduction and virtually disappear at the onset of the dry season when surface water dries up, like observed in temporary habitats of dry savannah areas...
November 2, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27601256/gene-structure-expression-and-dna-methylation-characteristics-of-sea-cucumber-cyclin-b-gene-during-aestivation
#11
Aijun Zhu, Muyan Chen, Xiumei Zhang, Kenneth B Storey
The sea cucumber, Apostichopus japonicus, is a good model for studying environmentally-induced aestivation by a marine invertebrate. One of the central requirements of aestivation is the repression of energy-expensive cellular processes such as cell cycle progression. The present study identified the gene structure of the cell cycle regulator, cyclin B, and detected the expression levels of this gene over three stages of the annual aestivation-arousal cycle. Furthermore, the DNA methylation characteristics of cyclin B were analyzed in non-aestivation and deep-aestivation stages of sea cucumbers...
December 5, 2016: Gene
https://www.readbyqxmd.com/read/27591287/eliminating-macchiademus-diplopterus-hemiptera-lygaeidae-and-siculobata-sicula-acari-oribatulidae-from-export-fruit-using-ethyl-formate
#12
Tim G Grout, Kim C Stoltz
South African fruit is sometimes rejected for export for the presence of live arthropods that are not considered pests of the fruit concerned. Macchiademus diplopterus (Distant) (Hemiptera: Lygaeidae) is a cereal pest but may aestivate on fruit of some tree crops in the Western Cape province of South Africa and occasionally results in rejections of export fruit. Ethyl formate in the form of the commercial product Vapormate (a patented combination of ethyl formate and carbon dioxide) was evaluated as a fumigant against M...
December 1, 2016: Journal of Economic Entomology
https://www.readbyqxmd.com/read/27582559/prevention-of-muscle-wasting-and-osteoporosis-the-value-of-examining-novel-animal-models
#13
REVIEW
Beau D Reilly, Craig E Franklin
Bone mass and skeletal muscle mass are controlled by factors such as genetics, diet and nutrition, growth factors and mechanical stimuli. Whereas increased mechanical loading of the musculoskeletal system stimulates an increase in the mass and strength of skeletal muscle and bone, reduced mechanical loading and disuse rapidly promote a decrease in musculoskeletal mass, strength and ultimately performance (i.e. muscle atrophy and osteoporosis). In stark contrast to artificially immobilised laboratory mammals, animals that experience natural, prolonged bouts of disuse and reduced mechanical loading, such as hibernating mammals and aestivating frogs, consistently exhibit limited or no change in musculoskeletal performance...
September 1, 2016: Journal of Experimental Biology
https://www.readbyqxmd.com/read/27581948/aestivation-and-brain-of-the-african-lungfish-protopterus-annectens
#14
COMMENT
Shit F Chew, Kum Hiong
Scientists have long been fascinated by animals undergoing aestivation, a state of torpor at high temperature, due to its great potential in fields ranging from medicine to space travel. The brain of the African lungfish is able to coordinate a whole-body response to induce aestivation and to arouse from aestivation.
July 2014: Temperature: Multidisciplinary Biomedical Journal
https://www.readbyqxmd.com/read/27568195/effects-of-seasonal-variation-on-oxidative-stress-physiology-in-natural-population-of-toad-bufo-melanostictus-clues-for-analysis-of-environmental-pollution
#15
Luna Samanta, Biswaranjan Paital
Natural population of Bufo melanostictus in response to environmental cues shows several physiologic changes such as reproductive activity, hibernation, aestivation and metabolic depression in different seasons. We investigated the effects of seasonal fluctuations on oxidative stress (OS) physiology biomarkers, such as endogenous (ELPx) and induced (ILPx) lipid peroxidation, front-line redox regulatory enzymes (superoxide dismutase: SOD and catalase) and two non-enzyme antioxidant metabolites (ascorbic acid and reduced glutathione) in liver, gonad and cerebral hemisphere of toads collected from the Bhubaneswar area of India, where temperature fluctuates considerably rising to the highest in summer (∼46 °C) and being lowest in winter (<10 °C)...
November 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27394476/descriptions-of-little-known-and-unknown-morphs-of-periphyllus-acerihabitans-zhang-hemiptera-aphididae-chaitophorinae
#16
Karina Wieczorek, Ge-Xia Qiao, Masakazu Sano, Hiroyuki Yoshitomi, Mariusz Kanturski
Periphyllus acerihabitans Zhang, 1982, associated with Acer buergerianum, is known only from the original description from China. Based on the type series and specimens collected in Japan, we re-describe apterous and alate viviparous females of P. acerihabitans and describe dimorph (aestivating nymph) and oviparous female in detail with illustrations. This is the first record of this species from Japan. The differences between P. acerihabitans and a related species P. viridis (Matsumura, 1919) are discussed...
March 17, 2016: Zootaxa
https://www.readbyqxmd.com/read/27376927/understanding-mechanism-of-sea-cucumber-apostichopus-japonicus-aestivation-insights-from-tmt-based-proteomic-study
#17
COMPARATIVE STUDY
Muyan Chen, Xingke Li, Aijun Zhu, Kenneth B Storey, Lina Sun, Tianxiang Gao, Tianming Wang
Marine invertebrate aestivation is a unique strategy for summer survival in response to hot marine conditions. The sea cucumber, Apostichopus japonicus, is an excellent model marine invertebrate for studies of environmentally-induced aestivation. In the present study, we used a tandem mass tag (TMT)-coupled LC-MS/MS approach to identify and quantify the global proteome expression profile over the aestivation-arousal cycle of A. japonicus. A total of 3920 proteins were identified from the intestine of sea cucumber...
September 2016: Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics
https://www.readbyqxmd.com/read/27318654/global-metabolite-analysis-of-the-land-snail-theba-pisana-hemolymph-during-active-and-aestivated-states
#18
COMPARATIVE STUDY
U Bose, E Centurion, M P Hodson, P N Shaw, K B Storey, S F Cummins
The state of metabolic dormancy has fascinated people for hundreds of years, leading to research exploring the identity of natural molecular components that may induce and maintain this state. Many animals lower their metabolism in response to high temperatures and/or arid conditions, a phenomenon called aestivation. The biological significance for this is clear; by strongly suppressing metabolic rate to low levels, animals minimize their exposure to stressful conditions. Understanding blood or hemolymph metabolite changes that occur between active and aestivated animals can provide valuable insights relating to those molecular components that regulate hypometabolism in animals, and how they afford adaptation to their different environmental conditions...
September 2016: Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics
https://www.readbyqxmd.com/read/27257549/ecological-implications-of-metabolic-compensation-at-low-temperatures-in-salamanders
#19
Alessandro Catenazzi
Global warming is influencing the biology of the world's biota. Temperature increases are occurring at a faster pace than that experienced by organisms in their evolutionary histories, limiting the organisms' response to new conditions. Mechanistic models that include physiological traits can help predict species' responses to warming. Changes in metabolism at high temperatures are often examined; yet many species are behaviorally shielded from high temperatures. Salamanders generally favor cold temperatures and are one of few groups of metazoans to be most species-rich in temperate regions...
2016: PeerJ
https://www.readbyqxmd.com/read/27127682/an-overview-of-seasonal-changes-in-oxidative-stress-and-antioxidant-defence-parameters-in-some-invertebrate-and-vertebrate-species
#20
REVIEW
Gagan Bihari Nityananda Chainy, Biswaranjan Paital, Jagneswar Dandapat
Antioxidant defence system, a highly conserved biochemical mechanism, protects organisms from harmful effects of reactive oxygen species (ROS), a by-product of metabolism. Both invertebrates and vertebrates are unable to modify environmental physical factors such as photoperiod, temperature, salinity, humidity, oxygen content, and food availability as per their requirement. Therefore, they have evolved mechanisms to modulate their metabolic pathways to cope their physiology with changing environmental challenges for survival...
2016: Scientifica
keyword
keyword
117526
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"