Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.

Hydration state does not affect selected body temperature during gravidity or gravidity duration in pythons (Antaresia childreni)
Comp Biochem Physiol A Mol Integr Physiol. 2024 Mar 8:111624. doi: 10.1016/j.cbpa.2024.111624. Online ahead of print.ABSTRACTThe embryonic development of many ectothermic species are highly sensitive to temperature and typically have a higher thermal optima than do most other physiological processes. Thus, female ectotherms often maintain a higher and more carefully controlled body temperature when she is supporting developing embryos (early development in oviparous species, throughout development in viviparous species). Considering the positive correlation between body temperature and evaporative water loss, this response...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - March 10, 2024 Category: Physiology Authors: Jill L Azzolini Dale F DeNardo Stephen C Pratt Source Type: research

Effects of dietary calcium (Ca < sup > 2+ < /sup > ) and blood feeding on the immunochemical expression of the plasma membrane Ca < sup > 2+ < /sup > -ATPase (PMCA) in Malpighian tubules of adult female mosquitoes (Aedes aegypti)
Comp Biochem Physiol A Mol Integr Physiol. 2024 Mar 6:111623. doi: 10.1016/j.cbpa.2024.111623. Online ahead of print.ABSTRACTInsect Malpighian tubules contribute to Ca2+ homeostasis via Ca2+ storage in intracellular compartments, Ca2+ secretion into the tubule lumen, and Ca2+ reabsorption into the hemolymph. A plasma membrane Ca2+-ATPase (PMCA) is hypothesized to be a Ca2+-transporter involved in renal Ca2+ transport of insects, however few studies have investigated its immunochemical expression in Malpighian tubules. Here we characterized the abundance and localization of PMCA-like immunoreactivity in Malpighian tubules o...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - March 8, 2024 Category: Physiology Authors: Yuan Li Peter M Piermarini Source Type: research

The effect of size and density on the mean retention time of particles in reindeer (Rangifer tarandus)
Comp Biochem Physiol A Mol Integr Physiol. 2024 Mar 6;292:111621. doi: 10.1016/j.cbpa.2024.111621. Online ahead of print.ABSTRACTParticle passage from the reticulorumen (RR) depends on particle density and size. A classic way of assessing these effects is the use of plastic markers of varying density and size that are recovered in the faeces. Here, we report results of an experiment where four fistulated reindeer (Rangifer tarandus, 96 ± 12 kg) were fed two different diets (browse, voluntary dry matter intake [DMI] 70 ± 10 g/kg0.75/d; or a pelleted diet, DMI 124 ± 52 g/kg0.75/d) and dosed via fistula with 8 different pa...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - March 7, 2024 Category: Physiology Authors: Martina Singer Daryl Codron Isabel Lechner Rebecca Rudnik Perry Barboza J ürgen Hummel Marcus Clauss Source Type: research

Thermal tolerance of a freshwater amphipod Gammarus lacustris can be enhanced by acclimation to higher mineralization
Comp Biochem Physiol A Mol Integr Physiol. 2024 Mar 5:111622. doi: 10.1016/j.cbpa.2024.111622. Online ahead of print.ABSTRACTTemperature and mineralization are among the most important environmental factors affecting all processes of aquatic ecosystems, including geographical distribution of water animals. Previously we showed that a brackish water population of Gammarus lacustris, a widespread amphipod, demonstrates substantially higher thermotolerance than a freshwater population. A possible reason for this difference is the fact that brackish water conditions are closer to internal media mineralization. Here we aimed to...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - March 7, 2024 Category: Physiology Authors: Elizaveta Kondrateva Kseniya Vereshchagina Andrei Mutin Maxim Timofeyev Source Type: research

Lipids in the American Alligator stratum corneum provide insights into the evolution of vertebrate skin
Comp Biochem Physiol A Mol Integr Physiol. 2024 Mar 5;292:111620. doi: 10.1016/j.cbpa.2024.111620. Online ahead of print.ABSTRACTIn terrestrial vertebrates, the outermost layer of the skin, the stratum corneum (SC), provides a durable and flexible interface with the environment and is comprised of corneocytes embedded in lipids. However, the morphology and lipid composition of the SC varies throughout evolutionary history. Because crocodilians and birds phylogenetically bracket the Archosaurian clade, lipid composition in crocodilian SC may be compared with that of birds and other vertebrates to make inferences about broad...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - March 7, 2024 Category: Physiology Authors: Elissa A Tam Frank E Robb Alex M Champagne Source Type: research

The effect of size and density on the mean retention time of particles in reindeer (Rangifer tarandus)
Comp Biochem Physiol A Mol Integr Physiol. 2024 Mar 5:111621. doi: 10.1016/j.cbpa.2024.111621. Online ahead of print.ABSTRACTParticle passage from the reticulorumen (RR) depends on particle density and size. A classic way of assessing these effects is the use of plastic markers of varying density and size that are recovered in the faeces. Here, we report results of an experiment where four fistulated reindeer (Rangifer tarandus, 96 ± 12 kg) were fed two different diets (browse, voluntary dry matter intake [DMI] 70 ± 10 g/kg0.75/d; or a pelleted diet, DMI 124 ± 52 g/kg0.75/d) and dosed via fistula with 8 different partic...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - March 7, 2024 Category: Physiology Authors: Martina Singer Daryl Codron Isabel Lechner Rebecca Rudnik Perry Barboza J ürgen Hummel Marcus Clauss Source Type: research

Lipids in the American Alligator stratum corneum provide insights into the evolution of vertebrate skin
Comp Biochem Physiol A Mol Integr Physiol. 2024 Mar 5:111620. doi: 10.1016/j.cbpa.2024.111620. Online ahead of print.ABSTRACTIn terrestrial vertebrates, the outermost layer of the skin, the stratum corneum (SC), provides a durable and flexible interface with the environment and is comprised of corneocytes embedded in lipids. However, the morphology and lipid composition of the SC varies throughout evolutionary history. Because crocodilians and birds phylogenetically bracket the Archosaurian clade, lipid composition in crocodilian SC may be compared with that of birds and other vertebrates to make inferences about broader p...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - March 7, 2024 Category: Physiology Authors: Elissa A Tam Frank E Robb Alex M Champagne Source Type: research

The role of the antennal glands and gills in acid-base regulation and ammonia excretion of a marine osmoconforming brachyuran
Comp Biochem Physiol A Mol Integr Physiol. 2024 Mar 2;292:111619. doi: 10.1016/j.cbpa.2024.111619. Online ahead of print.ABSTRACTThe excretory mechanisms of stenohaline marine osmoconforming crabs are often compared to those of the more extensively characterized euryhaline osmoregulating crabs. These comparisons may have limitations, given that unlike euryhaline brachyurans the gills of stenohaline marine osmoconformers possess ion-leaky paracellular pathways and lack the capacity to undergo ultrastructural changes that can promote ion-transport processes in dilute media. Furthermore, the antennal glands of stenohaline mar...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - March 4, 2024 Category: Physiology Authors: Garett Joseph Patrick Allen Alex R Quijada-Rodriguez Jonathan M Wilson Dirk Weihrauch Source Type: research

The role of the antennal glands and gills in acid-base regulation and ammonia excretion of a marine osmoconforming brachyuran
Comp Biochem Physiol A Mol Integr Physiol. 2024 Mar 2:111619. doi: 10.1016/j.cbpa.2024.111619. Online ahead of print.ABSTRACTThe excretory mechanisms of stenohaline marine osmoconforming crabs are often compared to those of the more extensively characterized euryhaline osmoregulating crabs. These comparisons may have limitations, given that unlike euryhaline brachyurans the gills of stenohaline marine osmoconformers possess ion-leaky paracellular pathways and lack the capacity to undergo ultrastructural changes that can promote ion-transport processes in dilute media. Furthermore, the antennal glands of stenohaline marine ...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - March 4, 2024 Category: Physiology Authors: Garett Joseph Patrick Allen Alex R Quijada-Rodriguez Jonathan M Wilson Dirk Weihrauch Source Type: research

Long-term fasting induced basal thermogenesis flexibility in female Japanese quails
In this study, female Japanese quails were subjected to prolonged starvation, and the body mass, basal metabolic rate (BMR), body temperature, mass of tissues and organs, body fat content, the state-4 respiration (S4R) and cytochrome c oxidase (CCO) activity in the muscle and liver of these birds were measured to determine the status of metabolic changes triggered by the starvation. In addition, the levels of glucose, triglyceride (TG) and uric acid, and thyroid hormones (T3 and T4) in the serum and the mRNA levels of myostatin (MSTN) and avian uncoupling protein (av-UCP) in the muscle were also measured. The results revea...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - March 3, 2024 Category: Physiology Authors: Jie-Heng Xu Xin-Yu Xu Xing-Yu Huang Ke-Xin Chen He Wen Ming Li Jin-Song Liu Source Type: research

NADK-mediated proline synthesis enhances high-salinity tolerance in the razor clam
In conclusion, our results demonstrate the important role of ScNADK in augmenting proline production under high-salinity stress, by which the razor clam is able to accommodate salinity variations in the ecological niche.PMID:38408517 | DOI:10.1016/j.cbpa.2024.111610 (Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology.)
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - February 26, 2024 Category: Physiology Authors: Ruiqi Liu Min Deng Na Zhang Yifeng Li Liang Jia Donghong Niu Source Type: research