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Oxidative phosphorylation rather than glycolysis is the primary energy source for sperm motility in the mussels Mytilus edulis
Comp Biochem Physiol B Biochem Mol Biol. 2023 Oct 26:110909. doi: 10.1016/j.cbpb.2023.110909. Online ahead of print.ABSTRACTBroadcast-spawning marine mussels rely on high sperm motility for successful fertilization in the dynamic seawater environment. Mitochondria are typically considered the primary source of ATP generation via oxidative phosphorylation (OXPHOS); however, the ATP generation pathways of mussel sperm have not been fully characterized. To better understand the importance of both OXPHOS and glycolysis for mussel sperm function, we conducted experiments inhibiting these pathways in sperm from Mytilus edulis. O...
Source: Comparative biochemistry and physiology. Part B, Biochemistry and molecular biology. - October 28, 2023 Category: Biochemistry Authors: Hui Kong Inna M Sokolova Source Type: research

Physiological indices and liver gene expression related to glucose supply in Brandt's vole (Lasiopodomys brandtii) exhibit species- and oxygen concentration-specific responses to hypoxia
This study aimed to investigate characteristics in physiological indices and liver gene expression associated with glucose supply in Brandt's voles under hypoxia. Serum glucose of Brandt's voles remained stable under 10% O2, increased under 7.5% O2, and decreased under 5% O2. Serum lactate increased under 10% O2, decreased under 7.5% O2, increased at 6 h and decreased at 12 h under 5% O2. Liver glycogen increased under 10% O2, remained constant under 7.5% O2, and reduced under 5% O2. Pepck and G6pase expression associated with gluconeogenesis decreased under 10% O2, while Pepck expression decreased and G6pase expression in...
Source: Comparative biochemistry and physiology. Part B, Biochemistry and molecular biology. - October 28, 2023 Category: Biochemistry Authors: Dan Pan Yuhua Shi Maolin Huang Xiujuan Li Zishi Wang Yifeng Zhang Hong Sun Zhenlong Wang Source Type: research

Activities of antioxidant enzymes and Hsp levels in response to elevated temperature in land snail species with varied latitudinal distribution
Comp Biochem Physiol B Biochem Mol Biol. 2023 Oct 11;269:110908. doi: 10.1016/j.cbpb.2023.110908. Online ahead of print.ABSTRACTLand snails occupy a variety of habitats, with differing temperature and humidity regimes and exhibit a wide span of adaptations, to withstand abiotic condition changes. The present work's aim was to examine the correlation of habitat's thermal adversity in different Mediterranean type habitats with the land snail's antioxidant and heat shock responses. For this purpose, snails of different species from populations along a north-south axis from the islands and mainland of Greece were exposed to el...
Source: Comparative biochemistry and physiology. Part B, Biochemistry and molecular biology. - October 13, 2023 Category: Biochemistry Authors: Alexandra Staikou Konstantinos Sagonas Olga Spanoudi Katerina Savvidou Zoumboul Nazli Konstantinos Feidantsis Basile Michaelidis Source Type: research

Activities of antioxidant enzymes and Hsp levels in response to elevated temperature in land snail species with varied latitudinal distribution
Comp Biochem Physiol B Biochem Mol Biol. 2023 Oct 11:110908. doi: 10.1016/j.cbpb.2023.110908. Online ahead of print.ABSTRACTLand snails occupy a variety of habitats, with differing temperature and humidity regimes and exhibit a wide span of adaptations, to withstand abiotic condition changes. The present work's aim was to examine the correlation of habitat's thermal adversity in different Mediterranean type habitats with the land snail's antioxidant and heat shock responses. For this purpose, snails of different species from populations along a north-south axis from the islands and mainland of Greece were exposed to elevat...
Source: Comparative biochemistry and physiology. Part B, Biochemistry and molecular biology. - October 13, 2023 Category: Biochemistry Authors: Alexandra Staikou Konstantinos Sagonas Olga Spanoudi Katerina Savvidou Zoumboul Nazli Konstantinos Feidantsis Basile Michaelidis Source Type: research