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Species-specific oxylipins and the effects of ontogeny and predation on their emission from freshwater snails
Comp Biochem Physiol A Mol Integr Physiol. 2024 Feb 13:111607. doi: 10.1016/j.cbpa.2024.111607. Online ahead of print.ABSTRACTChemical cues play important roles in mediating ecological interactions. Oxylipins, oxygenated metabolites of fatty acids, are one signalling molecule type that influences the physiology and function of species, suggesting their broader significance in chemical communication within aquatic systems. Yet, our current understanding of their function is restricted taxonomically and contextually making it difficult to infer their ecological significance. Snails and leeches are ubiquitous in freshwater ec...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - February 15, 2024 Category: Physiology Authors: Olwyn C Friesen Harold M Aukema Jillian T Detwiler Source Type: research

Immune and endocrine alterations at the early stage of inflammatory assemblage in toads after stimulation with heat-killed bacteria (Aeromonas hydrophila)
Comp Biochem Physiol A Mol Integr Physiol. 2024 Feb 12:111606. doi: 10.1016/j.cbpa.2024.111606. Online ahead of print.ABSTRACTThe red-leg syndrome in amphibians is a condition commonly associated with the bacteria Aeromonas hydrophila and has led to population declines. However, there is little information concerning the inflammatory assemblage in infected anurans. We evaluated immune and endocrine alterations induced by stimulation with heat-killed A. hydrophila injected in Rhinella diptycha toads. Control animals were not manipulated, while the others were separated into groups that received intraperitoneal injection of ...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - February 14, 2024 Category: Physiology Authors: Patr ício G Garcia Neto Stefanny C M Titon Sandra M Muxel Braz Titon Aymam C de Figueiredo Felipe R Floreste Alan S Lima Vania R Assis Fernando R Gomes Source Type: research

Short-term exposure to high pCO < sub > 2 < /sub > leads to decreased branchial cytochrome C oxidase activity in the presence of octopamine in a decapod
Comp Biochem Physiol A Mol Integr Physiol. 2024 Feb 10:111603. doi: 10.1016/j.cbpa.2024.111603. Online ahead of print.ABSTRACTIn a recent mechanistic study, octopamine was shown to promote proton transport over the branchial epithelium in green crabs, Carcinus maenas. Here, we follow up on this finding by investigating the involvement of octopamine in an environmental and physiological context that challenges acid-base homeostasis, the response to short-term high pCO2 exposure (400 Pa) in a brackish water environment. We show that hyperregulating green crabs experienced a respiratory acidosis as early as 6 h of exposure to...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - February 12, 2024 Category: Physiology Authors: Sandra Fehsenfeld Gwangseok R Yoon Alex R Quijada-Rodriguez Haluka Kandachi-Toujas Piero Calosi Sophie Breton Dirk Weihrauch Source Type: research

Erratum to " Temperature and hypoxia trigger developmental phenotypic plasticity of cardiorespiratory physiology and growth in the parthenogenetic marbled crayfish, Procambarus virginalis Lyko, 2017" [Comparative Biochemistry and Physiology, Part A 288 (2024) 111562]
Comp Biochem Physiol A Mol Integr Physiol. 2024 Feb 7;291:111591. doi: 10.1016/j.cbpa.2024.111591. Online ahead of print.NO ABSTRACTPMID:38330516 | DOI:10.1016/j.cbpa.2024.111591 (Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology.)
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - February 8, 2024 Category: Physiology Authors: Torben G öpel Warren W Burggren Source Type: research

Sensitivity of different organs and tissues as biomarkers of oxidative stress in juvenile tambaqui (Colossoma macropomum) submitted to fasting
In conclusion, our results confirm that a 7-day fasting period induced tissue-specific antioxidant responses, but the increase in antioxidant responses was only for the SOD and GPX enzymes of the liver and intestine. Additionally, the liver and intestine were the most responsive tissues, whereas the plasma was the least sensitive to oxidative stress.PMID:38316170 | DOI:10.1016/j.cbpa.2024.111595 (Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology.)
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - February 5, 2024 Category: Physiology Authors: Naiara Melo Stefania Priscilla de Souza Isaac Konig Daniella Aparecida de Jesus Paula Isabela Simas Ferreira Ronald Kennedy Luz Luis David Solis Murgas Source Type: research

Acute metformin induces hyperglycemia in healthy adult mourning doves, Zenaida macroura
In conclusion, metformin increases endogenous blood glucose via glycogenolysis in healthy adult male mourning doves.PMID:38311294 | DOI:10.1016/j.cbpa.2024.111594 (Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology.)
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - February 4, 2024 Category: Physiology Authors: Anthony J Basile Avin Kreisler Ryan Hassen Kavita Singh Maggie Symes Gale Larson Milena Figueiredo de Sousa Karen L Sweazea Source Type: research

Effects of different salinity reduction intervals on osmoregulation, anti-oxidation and apoptosis of Eriocheir sinensis megalopa
Comp Biochem Physiol A Mol Integr Physiol. 2024 Feb 1;291:111593. doi: 10.1016/j.cbpa.2024.111593. Online ahead of print.ABSTRACTEriocheir sinensis megalopa has a special life history of migrating from seawater to freshwater. In order to investigate how the megalopa adapt themselves to the freshwater environment, we designed an experiment to reduce the salinity of water from 30 ppt to 0 at rates of 30 ppt, 15 ppt, 10 ppt, and 5 ppt per 24 h to evaluate the effects of different degrees of hyposaline stress on the osmotic regulation ability and antioxidant system of the megalopa. Experimental results related to osmotic press...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - February 2, 2024 Category: Physiology Authors: Mingjun Shen Yue Wang Yongkai Tang Fei Zhu Jianbin Jiang Jianlou Zhou Qing Li Qingguo Meng Zhiwei Zhang Source Type: research

Developmental energetics in the oviparous corn snake, Pantherophis guttatus, confirms a conservative evolutionary pattern in snakes
This study measured oxygen consumption of corn snake, Pantherophis guttatus, embryos to determine if this species also exhibits an exponential increase in oxygen consumption. Individual eggs, sampled weekly from oviposition to hatching, were placed in respirometry chambers for 24-h during which oxygen consumption was recorded. Embryos were staged and carcasses and yolk were weighed separately. Results indicate steady inclines in oxygen consumption during early stages of development, with a rapid increase prior to hatching. The findings support the hypothesis that embryonic oxygen consumption of snakes differs from most oth...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - February 1, 2024 Category: Physiology Authors: Celeste R Gallardo James R Stewart Joseph R Bidwell Source Type: research

Superoxidase dismutases (SODs) in the European eel: Gene characterization, expression response to temperature combined with hormonal maturation and possible migratory implications
This study investigates SODs in the European eel and their expression patterns during testis maturation. Phylogenetic and synteny analyses revealed SODs paralogs and their evolution in vertebrates. The eel possesses one SOD1 and two SOD2/3 (a and b), indicating SOD2 and SOD3 duplication in elopomorphs. SODs expression were then evaluated in various male and female tissues. SOD1 is more expressed in females, while SOD2a and SOD2b dominate brain-pituitary-gonad tissues in both sexes. SOD3a showed predominant expression in the ovary and the male livers, whereas SOD3b was found in the pituitary and brain of both sexes. The eff...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - January 28, 2024 Category: Physiology Authors: L Ferr ão M Blanes-Garc ía L P érez J F Asturiano M Morini Source Type: research

Impacts of temperature and turbidity on the gill physiology of darter species
Comp Biochem Physiol A Mol Integr Physiol. 2024 Jan 20;291:111589. doi: 10.1016/j.cbpa.2024.111589. Online ahead of print.ABSTRACTFish gills are complex organs that have direct contact with the environment and perform numerous functions including gas exchange and ion regulation. Determining if gill morphometry can change under different environmental conditions to maintain and/or improve gas exchange and ion regulation is important for understanding if gill plasticity can improve survival with increasing environmental change. We assessed gill morphology (gas exchange and ion regulation metrics), hematocrit and gill Na+/K+ ...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - January 22, 2024 Category: Physiology Authors: Britney L Firth Paul M Craig D Andrew R Drake Michael Power Source Type: research

Halloween genes are expressed with a circadian rhythm during development in prothoracic glands of the insect RHODNIUS PROLIXUS
Comp Biochem Physiol A Mol Integr Physiol. 2024 Apr;290:111588. doi: 10.1016/j.cbpa.2024.111588. Epub 2024 Jan 18.ABSTRACTWe analyse the developmental and circadian profiles of expression of the genes responsible for ecdysteroidogenesis (Halloween genes) in the PGs of Rhodnius prolixus throughout larval-adult development. Extensive use of in vitro techniques enabled multiple different parameters to be measured in individual PGs. Expression of disembodied and spook closely paralleled the ecdysteroid synthesis of the same PGs, and the ecdysteroid titre in vivo, but with functionally significant exceptions. Various tissues ot...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - January 19, 2024 Category: Physiology Authors: Xanthe Vafopoulou Colin G H Steel Source Type: research

Ecophysiological responses of Liolaemus arambarensis juveniles to experimental temperature variations
Comp Biochem Physiol A Mol Integr Physiol. 2024 Apr;290:111577. doi: 10.1016/j.cbpa.2024.111577. Epub 2024 Jan 14.ABSTRACTClimate change increasingly influences the loss of biodiversity, especially in ectothermic organisms, which depend on environmental temperatures to obtain heat and regulate their life cycle. Studies that aim to understand the impact of temperature variation are important to better understand the possible impacts generated on the homeostasis of ectothermic organisms. Our objective was to characterize the responses of juvenile Liolaemus arambarensis lizards to abrupt changes in temperature, quantifying ma...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - January 16, 2024 Category: Physiology Authors: Artur Antunes Navarro Valgas Gustavo Kasper Cubas Diogo Reis de Oliveira J éssica Fonseca Araujo Stefani Altenhofen Carla Denise Bonan Guendalina Turcato Oliveira Laura Verrastro Source Type: research

The effects of low ambient temperature on steroidogenesis and mitochondrial functions in the testes of wild ground squirrels (Spermophilus dauricus)
In conclusion, the low ambient temperature inhibited spermatogenesis, steroidogenesis, as well as mitochondrial dynamics and functions in the testes of wild ground squirrels.PMID:38228267 | DOI:10.1016/j.cbpa.2024.111585 (Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology.)
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - January 16, 2024 Category: Physiology Authors: Shiman Guo Wenjin Yang Di Chen Baolong Ren Li Guo Xi Wang Wenqian Xie Sijie Fan Maria Daniela Artigas Ramirez Yingying Han Zhengrong Yuan Haolin Zhang Qiang Weng Source Type: research

Clogmia albipunctata (Williston, 1893) midgut physiology: pH control and functional relationship with Lower Diptera (nematoceran) especially with hematophagous species
Comp Biochem Physiol A Mol Integr Physiol. 2024 Apr;290:111584. doi: 10.1016/j.cbpa.2024.111584. Epub 2024 Jan 14.ABSTRACTClogmia albipunctata (Williston, 1893) is a non-hematophagous insect belonging to the order Diptera, suborder Nematocera (Lower Diptera) and family Psychodidae. In the present work, we investigated how C. albipunctata control their midgut pH under different physiological conditions, comparing their midgut physiology with some nematoceran hematophagous species. The C. albipunctata midgut pH was measured after ingestion of sugar, protein and under the effect of the alkalinizing hormone released in the hem...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - January 15, 2024 Category: Physiology Authors: Luccas Gabriel Ferreira Malta Leonardo Barbosa Koerich Grasielle Caldas D' Ávila Pessoa Ricardo N Araujo Mauricio Roberto Viana Sant'Anna Marcos H Pereira Nelder Figueiredo Gontijo Source Type: research

Short communication: Baroreflex function in embryonic emus (Dromiceius novaehollandiae)
Comp Biochem Physiol A Mol Integr Physiol. 2024 Apr;290:111576. doi: 10.1016/j.cbpa.2024.111576. Epub 2024 Jan 12.ABSTRACTThe baroreflex involves cardiovascular homeostatic mechanisms that buffer the system against acute deviations in arterial blood pressure. It is comprised of the cardiac limb which involves adjustments in heart rate and the peripheral limb which involves adjustments in vascular resistance. This negative feedback loop mechanism has been investigated in numerous species of adult vertebrates, however our understanding of the maturation and functional importance of the reflex in developing animals remains po...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - January 14, 2024 Category: Physiology Authors: Dane A Crossley Brian P Bagatto Ed M Dzialowski Warren W Burggren James W Hicks Source Type: research