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.

Dietary lipid sensing through fatty acid oxidation and chylomicron formation in the gastrointestinal tract of rainbow trout
This study, using rainbow trout (Oncorhynchus mykiss) as model, aimed to characterize the role of FAO and chylomicron formation as peripheral lipid sensors potentially able to modulate feeding in fish. Fish fed with either a normal- (24%) or high- (32%) fat diet were intraperitoneally injected with water alone or containing etomoxir (inhibitor of FAO rate-limiting enzyme carnitine palmitoyl-transferase 1). First, feed intake levels were recorded. We observed an etomoxir-derived decrease in feeding at short times, but a significant increase at 48 h after treatment in fish fed normal-fat diet. Then, we evaluated putative eto...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - April 24, 2024 Category: Physiology Authors: Jessica Calo Ayel én M Blanco Jos é L Soengas Source Type: research

Relatedness of hypoxia and hyperthermia tolerances in the Nile tilapia (Oreochromis niloticus) and their relationships with cardiac and gill traits
In this study the interrelatedness of hyperthermia and hypoxia tolerances in the Nile tilapia (Oreochromis niloticus), and their links to cardiorespiratory traits were examined. Different groups of O. niloticus (n = 51) were subjected to hypoxia and hyperthermia challenges and the O2 tension for aquatic surface respiration (ASR pO2) and critical thermal maximum (CTmax) were assessed as measurement endpoints. Gill filament length, total filament number, ventricle mass, length and width were also measured. Tolerance to hypoxia, as evidenced by ASR pO2 thresholds of the individual fish, was highly variable and varied between ...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - April 21, 2024 Category: Physiology Authors: Jesslyn Akrokoh Jedida Osei Bediako Kelvin Fafanyo Harriya Musah-Yussif Audrey Korsah Asubonteng Henry Owusu Adjei Anthea Georgina Ama Ofori Peter Vilhelm Skov Kwasi Adu Obirikorang Source Type: research

Exploration of cell-cell interactions and the notch signaling pathway in the gonadal niche of Crassostrea gigas
This study provides an extensive elucidation of the male and female gonadal niches within Crassostrea gigas. Examination via transmission electron microscopy revealed the presence of desmosome-like connection not only between germ cells and niche cells but also among adjacent niche cells within the oyster gonad. Transcriptomic analysis identified several putative Notch pathway components, including CgJAG1, CgNOTCH1, CgSuh, and CgHey1. Phylogenetic analysis indicated a close evolutionary relationship between CgJAG1, CgNOTCH1, and CgHey1 and Notch members present in Drosophila. Expression profiling results indicated a notabl...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - April 19, 2024 Category: Physiology Authors: Huihui Wang Hong Yu Qi Li Source Type: research

Two hexokinases of the shrimp Penaeus (Litopenaeus) vannamei are differentially expressed during oxygen limited conditions
Comp Biochem Physiol A Mol Integr Physiol. 2024 Jul;293:111637. doi: 10.1016/j.cbpa.2024.111637. Epub 2024 Apr 5.ABSTRACTThe white shrimp Penaeus (Litopenaeus) vannamei is the most cultivated shrimp worldwide. Compared to other shrimp species, it has higher resistance to adverse conditions. During hypoxia, the shrimp reduces oxygen consumption and adjusts energy metabolism via anaerobic glycolysis, among other strategies. Hexokinase (HK) is the first enzyme of glycolysis and a key regulation point. In mammals and other vertebrates, there are several tissue-specific HK isoforms with differences in expression and enzyme acti...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - April 7, 2024 Category: Physiology Authors: Marissa A Flores-Sauceda Lilia Leyva-Carrillo Laura Camacho-Jim énez Silvia G ómez-Jiménez Alma B Peregrino-Uriarte Gloria Yepiz-Plascencia Source Type: research

Two hexokinases of the shrimp Penaeus (Litopenaeus) vannamei are differentially expressed during oxygen limited conditions
Comp Biochem Physiol A Mol Integr Physiol. 2024 Apr 5;293:111637. doi: 10.1016/j.cbpa.2024.111637. Online ahead of print.ABSTRACTThe white shrimp Penaeus (Litopenaeus) vannamei is the most cultivated shrimp worldwide. Compared to other shrimp species, it has higher resistance to adverse conditions. During hypoxia, the shrimp reduces oxygen consumption and adjusts energy metabolism via anaerobic glycolysis, among other strategies. Hexokinase (HK) is the first enzyme of glycolysis and a key regulation point. In mammals and other vertebrates, there are several tissue-specific HK isoforms with differences in expression and enz...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - April 7, 2024 Category: Physiology Authors: Marissa A Flores-Sauceda Lilia Leyva-Carrillo Laura Camacho-Jim énez Silvia G ómez-Jiménez Alma B Peregrino-Uriarte Gloria Yepiz-Plascencia Source Type: research

Two hexokinases of the shrimp Penaeus (Litopenaeus) vannamei are differentially expressed during oxygen limited conditions
Comp Biochem Physiol A Mol Integr Physiol. 2024 Apr 5:111637. doi: 10.1016/j.cbpa.2024.111637. Online ahead of print.ABSTRACTThe white shrimp Penaeus (Litopenaeus) vannamei is the most cultivated shrimp worldwide. Compared to other shrimp species, it has higher resistance to adverse conditions. During hypoxia, the shrimp reduces oxygen consumption and adjusts energy metabolism via anaerobic glycolysis, among other strategies. Hexokinase (HK) is the first enzyme of glycolysis and a key regulation point. In mammals and other vertebrates, there are several tissue-specific HK isoforms with differences in expression and enzyme ...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - April 7, 2024 Category: Physiology Authors: Marissa A Flores-Sauceda Lilia Leyva-Carrillo Laura Camacho-Jim énez Silvia G ómez-Jiménez Alma B Peregrino-Uriarte Gloria Yepiz-Plascencia Source Type: research

Effects of thermophily-relevant temperature variation and sex on digestive performance in pythons
Comp Biochem Physiol A Mol Integr Physiol. 2024 Apr 2;293:111636. doi: 10.1016/j.cbpa.2024.111636. Online ahead of print.ABSTRACTDifferent physiological performances are often optimized at slightly varying temperatures, which can lead to ectotherms selecting higher body temperatures during certain physiological efforts (e.g., digestion, reproduction). Such thermophilic responses can lead to temperature-based tradeoffs between two physiological activities with differing optimal temperatures or between optimizing a physiological activity and water balance, as water loss is elevated at higher temperatures. For example, ectoth...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - April 4, 2024 Category: Physiology Authors: Derek M Benson Dale F DeNardo Source Type: research