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Identification and expression analysis of transcripts involved in taurine biosynthesis during early ontogeny of tropical gar Atractosteus tropicus
This study determined if the tropical gar (Atractosteus tropicus), an ancient holostean fish model, has the molecular mechanism to synthesize taurine through the identification and analysis expression of transcripts coding for proteins involved in its biosynthesis and transportation, at different embryo-larvae stages and in different organs of juveniles (31 dah). We observed a fluctuating expression of all transcripts involved in the three pathways at all analyzed stages. All transcripts are expressed during the beginning of larval development; however, ado and taut show a peak expression at 9 dah, and all transcripts but ...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - August 10, 2023 Category: Physiology Authors: Talhia Mart ínez-Burguete Emyr Sa úl Peña-Marín Ra úl Antonio Llera-Herrera Luis Daniel Jim énez-Martínez Rafael Mart ínez-García Carina Shyanya Alvarez-Villagomez Carlos Alfonso Alvarez-Gonz ález Source Type: research

Energy constraint and compensation: Insights from endurance athletes
Comp Biochem Physiol A Mol Integr Physiol. 2023 Aug 7:111500. doi: 10.1016/j.cbpa.2023.111500. Online ahead of print.ABSTRACTThe Constrained Model of Total Energy Expenditure predicts that increased physical activity may not influence total energy expenditure, but instead, induces compensatory energetic savings in other processes. Much remains unknown, however, about concepts of energy expenditure, constraint and compensation in different populations, and it is unclear whether this model applies to endurance athletes, who expend very large amounts of energy during training and competition. Furthermore, it is well-establish...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - August 9, 2023 Category: Physiology Authors: Eimear Dolan Karsten Koehler Jose Areta Daniel P Longman Herman Pontzer Source Type: research

The cutaneous stress response system in three-spined stickleback and European flounder exposed to oxidative stress: Different mode of action
This study investigates the mode of action of CSRS in two teleost species of different biology and skin characteristics, the three-spined stickleback and the European flounder, after exposure to oxidative stress induced by a potassium dichromate solution. The cutaneous stress response system presents different ways of action in two studied species: Mel concentration increases in the skin of both species, but cortisol concentration increases in the skin only in sticklebacks. Data suggest that stickleback skin cells can produce cortisol. However, cortisol is not involved in the response to oxidative stress in flounders. In s...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - August 4, 2023 Category: Physiology Authors: Konrad Pomianowski Magdalena Gozdowska Ewa Soko łowska Ewa Kulczykowska Source Type: research

Review: A species comparison of the kinetic homogeneous and heterogeneous organization of sodium-dependent glucose transport systems along the intestine
Comp Biochem Physiol A Mol Integr Physiol. 2023 Aug 1:111492. doi: 10.1016/j.cbpa.2023.111492. Online ahead of print.ABSTRACTThe targeted use of carbohydrates by feed and food industries to create balanced and cost-effective diets has generated a tremendous amount of research in carbohydrate digestion and absorption in different species. Specifically, this research has led us to a larger observation that identified different organizations of intestinal sodium-dependent glucose absorption across species, which has not been previously collated and reviewed. Thus, this review will compare the kinetic segregation of sodium-dep...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - August 3, 2023 Category: Physiology Authors: Marina Subramaniam Matthew E Loewen Source Type: research

Corrigendum to "Acute critical thermal maximum does not predict chronic incremental thermal maximum in Atlantic salmon (Salmo salar)" [Comparative Biochemistry and Physiology Part A: Molecular and Integrative Physiology 266 (2022), 111143]
Comp Biochem Physiol A Mol Integr Physiol. 2023 Jul 29;284:111491. doi: 10.1016/j.cbpa.2023.111491. Online ahead of print.NO ABSTRACTPMID:37523929 | DOI:10.1016/j.cbpa.2023.111491 (Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology.)
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - July 31, 2023 Category: Physiology Authors: Charlotte B Bartlett Amber F Garber Serap Gonen Tillmann J Benfey Source Type: research

Body mass dependence of oxidative phosphorylation efficiency in liver mitochondria from mammals
Comp Biochem Physiol A Mol Integr Physiol. 2023 Jul 20;284:111490. doi: 10.1016/j.cbpa.2023.111490. Online ahead of print.ABSTRACTIn eukaryotes, the performances of an organism are dependent on body mass and chemically supported by the mitochondrial production of ATP. Although the relationship between body mass and mitochondrial oxygen consumption is well described, the allometry of the transduction efficiency from oxygen to ATP production (ATP/O) is still poorly understood. Using a comparative approach, we investigated the oxygen consumption and ATP production of liver mitochondria from twelve species of mammals ranging f...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - July 21, 2023 Category: Physiology Authors: M élanie Boël Yann Voituron Damien Roussel Source Type: research