Article
Cell Biology
Sampath A. Kumar, Tomas Albrecht, Ondrej Kauzal, Oldrich Tomasek
Summary: The study found that longevity is not significantly associated with fatty acid unsaturation, but rather with long-chain fatty acids. Different fatty acids or indices were associated with maximum life span, annual fecundity, and basal metabolic rate, indicating that they coevolve with different aspects of fatty acid composition. This challenges the membrane pacemaker hypothesis and suggests that fatty acid composition may not be a key evolutionary constraint underlying life-history trade-offs at the molecular level.
FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY
(2021)
Article
Environmental Sciences
Xiaoran Wei, Nan Liu, Jian Song, Chao Ren, Xiaowen Tang, Wei Jiang
Summary: SiO2 nanoparticles can affect the fluidity of cell membranes, with a more significant impact at higher temperatures. Components such as phosphatidyl ethanolamine and phosphoinositide can mitigate the membrane gelation caused by the nanoparticles.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Samuel Boff, Ricarda Scheiner, Josue Raizer, Daniela Lupi
Summary: The study shows that long-term exposure to field-realistic doses of sulfoxaflor has a negative impact on the survival rate of solitary bees, leading to mortality. Bees exposed to pesticide tend to visit flowers by walking rather than flying, and their flight performance is impaired by the pesticide as well.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Chemistry, Physical
Stephanie Andrade, Maria Joao Ramalho, Joana Angelica Loureiro, Maria Carmo Pereira
Summary: The study found that the interaction between ferulic acid and mimetic cell membrane models depends on the lipid composition, complexity, and physical state of the membranes. Ferulic acid is mainly located near the membrane surface and interacts electrostatically with the zwitterionic polar heads of phospholipids. The partition of ferulic acid is significantly reduced with the increase of membrane complexity.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Environmental Sciences
Nenad M. Zaric, Robert Brodschneider, Walter Goessler
Summary: This study analyzed the elemental composition of individual honey bees for the first time, revealing significant differences in elemental concentrations between hives within the same apiary as well as between different apiaries. The study highlights the importance of sampling a larger number of hives at each location when using honey bees as biomonitors to ensure reliable interpretation of results. Additionally, negative correlations between the dry mass of a bee and concentrations of certain elements suggest potential factors such as honey or nectar content impacting the elemental composition of individual bees.
ENVIRONMENTAL RESEARCH
(2022)
Article
Biochemistry & Molecular Biology
Sergey V. Kraevsky, Irina A. Ivanova, Sergey L. Kanashenko, Ivan D. Shumov, Ilya A. Ryazantsev, Yulia A. Tereshkina, Lyubov V. Kostryukova, Yulia A. Romashova, Tatyana O. Pleshakova
Summary: The morphological features of a nanoform of a phospholipid composition (NFPh) were studied using atomic force microscopy (AFM). The mean diameter of the NFPh vesicles was determined to be approximately 20 nm using dynamic light scattering (DLS). Four types of objects related to NFPh were observed using AFM, and it was proposed that these objects formed through fusion of vesicles of the same size.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Review
Chemistry, Physical
R. T. Coones, R. J. Green, R. A. Frazier
Summary: The study explored the variability in lipid composition of epithelial membranes in the human gastrointestinal tract, highlighting that phosphatidylcholine dominates, while phosphatidylethanolamines and cholesterol have similar abundances. The research provides insights into the roles of lipid headgroups in various membrane types and the differences between major bilayer-forming lipids and peripheral lipids.
Article
Physiology
Robert Brodschneider, Eslam Omar, Karl Crailsheim
Summary: The flight performance of adult honey bees is influenced by pollen nutrition. Bees deprived of pollen fly longer and further, while bees fed pollen have faster flight speeds in the early stages. Early deprivation of pollen affects bee development, performance, and body weight, as well as survival rate.
FRONTIERS IN PHYSIOLOGY
(2022)
Article
Microbiology
Taylor J. Busby, Craig R. Miller, Nancy A. Moran, James T. Van Leuven
Summary: Microbial communities in animal digestive systems play crucial roles in host development and health. However, little is known about the temporal and spatial dynamics of bacteriophage communities in animal digestive systems. This study focuses on bacteriophages in the gut of honey bees and reveals their conservation and specialization in different geographic locations.
Article
Behavioral Sciences
Hagai Y. Shpigler, Tali Magory Cohen, Einat Ben-Shimol, Roi Ben-Betzalel, Eran Levin
Summary: Juvenile hormone (JH) can accelerate metabolic rate in bumble bees, leading to increased food consumption and protein turnover. Its effects on queens also include reducing flight muscle mass and lipid levels, as well as decreasing diapause survival.
HORMONES AND BEHAVIOR
(2021)
Article
Biophysics
Teruhiko Baba, Toshiyuki Takagi, Kimio Sumaru, Toshiyuki Kanamori, Takehisa Dewa, Mamoru Nango
Summary: The study found that partially fluorinated phospholipid DF8CCH8PC formed more expanded and stable membranes compared to its non-fluorinated counterpart DH8CCH8PC, with restricted molecular motion. Although the reconstitution efficiencies of LH2 and LH1-RC into DF8CCH8PC membranes were lower, the membrane proteins showed increased thermostability. This suggests that partially fluorinated PCs may be useful materials for constructing lipid-functional membrane protein assemblies for biotechnological applications.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Article
Biochemistry & Molecular Biology
Jordi Marti, Huixia Lu
Summary: This study investigates the interactions of tryptophan, serotonin, and melatonin with zwitterionic phospholipid bilayers through molecular dynamics simulations. The presence of cholesterol influences the behavior of these small molecules, affecting their binding to the membrane. Free energy barriers and diffusion rates of the small molecules provide insights into their interaction with phospholipids and cholesterol in the membrane environment.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Food Science & Technology
Yingchao Huang, Teng Wei, Fang Chen, Chaoli Tan, Zhiqing Gong, Fengxin Wang, Zeyuan Deng, Jing Li
Summary: This study aimed to investigate the changes of milk fat globules (MFG) and their membranes after thermal treatments, and analyzed the relationship between the stability of MFG and interfacial compositions of the milk fat globule membrane (MFGM). The results showed that thermal treatment damaged the MFGM and caused MFG coalescence. The physical properties of the membranes were affected, and the abundance of MFGM proteins changed after thermal treatment. The results of phospholipidomics showed specific changes in phospholipid species, which could distinguish different samples.
FOOD RESEARCH INTERNATIONAL
(2023)
Article
Endocrinology & Metabolism
Ahmad Majzoub, Haitham Elbardisi, Sarah Madani, Kristian Leisegang, Mohamed Mahdi, Ashok Agarwal, Ralf Henkel, Kareim Khalafalla, Sami ElSaid, Mohamed Arafa
Summary: The study aims to assess the impact of MetAge and body composition on male sexual and gonadal status, especially in men younger than 40 years old. The results showed that age and body composition parameters significantly affected the androgenic state. Erectile dysfunction in men younger than 40 years was associated with lower testosterone levels, older MetAge, and higher BMI and degree of obesity.
FRONTIERS IN ENDOCRINOLOGY
(2023)
Article
Engineering, Environmental
Xiaomin Ren, Lingxuan Wang, Hongyan Fu, Yu Wang, Dan Hu, Xudong Feng
Summary: Nanofiltration is a widely used technology in seawater desalination, resource recovery, and drinking water purification due to its low energy consumption and no secondary pollution. However, the trade-off effect and membrane fouling limit its application. In this study, glycerol was introduced into the reactive solution to regulate the chemical composition and membrane structure. The addition of glycerol increased the viscosity of the solution, which slowed down the diffusion rate and caused the formation of a crumpled structure. It was found that a membrane with 60% glycerol content showed a pure water permeance of 21.14 L.m(-2).h(-1).bar(-1) with a sodium sulfate rejection of 95.6%. The increase in glycerol concentration led to a competitive reaction between the amine monomer and glycerol, resulting in a minimum oxygen content in the membrane composition. The membrane with a similar structure and higher oxygen content exhibited stronger anti-fouling ability against humic acid. Thus, the rational design of a crumpled membrane with high oxygen-chemical composition could potentially achieve a high flux nanofiltration membrane with anti-fouling performance.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Physiology
Kevin Choi, Jean-Michel Weber
AMERICAN JOURNAL OF PHYSIOLOGY-REGULATORY INTEGRATIVE AND COMPARATIVE PHYSIOLOGY
(2016)
Article
Biochemistry & Molecular Biology
Sophie Bussiere-Cote, Teye Omlin, Eliana de Cassia Pinheiro, Jean-Michel Weber
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY
(2016)
Review
Biology
Jean-Michel Weber, Kevin Choi, Alex Gonzalez, Teye Omlin
JOURNAL OF EXPERIMENTAL BIOLOGY
(2016)
Article
Biology
Loic Teulier, Jean-Michel Weber, Julie Crevier, Charles-A. Darveau
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2016)
Article
Biology
Eric D. Turenne, Jean-Michel Weber
JOURNAL OF EXPERIMENTAL BIOLOGY
(2018)
Article
Biochemistry & Molecular Biology
Enrique Rodriguez, Jean-Michel Weber, Charles-A. Darveau
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY
(2018)
Article
Physiology
Jolinatlion L. Forbes, Daniel J. Kostyniuk, Jan A. Mennigen, Jean-Michel Weber
AMERICAN JOURNAL OF PHYSIOLOGY-REGULATORY INTEGRATIVE AND COMPARATIVE PHYSIOLOGY
(2019)
Article
Biochemistry & Molecular Biology
Elie Farhat, Eric D. Turenne, Kevin Choi, Jean-Michel Weber
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY
(2019)
Article
Biology
Johnathon L. Forbes, Daniel J. Kostyniuk, Jan A. Mennigen, Jean-Michel Weber
JOURNAL OF EXPERIMENTAL BIOLOGY
(2019)
Article
Physiology
Elie Farhat, Maiah E. M. Devereaux, Matthew E. Pamenter, Jean -Michel Weber
AMERICAN JOURNAL OF PHYSIOLOGY-REGULATORY INTEGRATIVE AND COMPARATIVE PHYSIOLOGY
(2020)
Article
Biochemistry & Molecular Biology
Elie Farhat, Hang Cheng, Caroline Romestaing, Matthew Pamenter, Jean-Michel Weber
Summary: Goldfish acclimated to hypoxia mainly achieve metabolic suppression by adjusting glycolytic supply, reducing brain Na+/K+-ATPase, and downregulating COX, potentially decreasing mitochondrial density. The responses of mitochondrial respiration and key enzymes vary across tissues, indicating tissue-specific effects of hypoxia on metabolic pathways.
Article
Biology
Mais Jubouri, Giancarlo G. M. Talarico, Jean-Michel Weber, Jan A. Mennigen
Summary: The study demonstrates that alanine inhibits glucose metabolism in rainbow trout, leading to a reduction in blood glucose levels. This effect is likely mediated through stimulation of insulin secretion and involves specific gene expression changes in muscle, differing from the mechanisms observed in mammals.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2021)
Review
Biochemistry & Molecular Biology
Elie Farhat, Jean-Michel Weber
Summary: Metabolic suppression is an essential strategy to cope with chronic hypoxia, and the remodeling of membrane lipids is proposed as a novel mechanism to suppress ATP use and production. Environmental factors such as temperature, diet, and body mass can impact the lipid composition of membranes, modulating metabolic capacity. Vertebrate champions of hypoxia tolerance and hibernating mammals show extensive changes in membrane lipids, which can promote the downregulation of ion pumps and energy metabolism to maintain ATP supply-demand balance in hypometabolic states.
Article
Biology
Elisa Thoral, Elie Farhat, Damien Roussel, Hang Cheng, Ludovic Guillard, Matthew E. Pamenter, Jean-Michel Weber, Loic Teulier
Summary: In goldfish, chronic exposure to constant hypoxia leads to metabolic suppression, increased anaerobic capacity, and improved swimming performance, with no changes at the mitochondrial level. On the other hand, swimming performance enhancement is reduced in intermittent hypoxia, with decreased aerobic scope despite an increase in oxidative metabolism.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2022)
Article
Fisheries
Peter Elliot Holder, Chris M. Wood, Michael J. Lawrence, Timothy D. Clark, Cory D. Suski, Jean-Michel Weber, Andy J. Danylchuk, Steven J. Cooke
Summary: Post-exercise mortality (PEM) can occur in fish when they exercise to exhaustion and surpass their physiological limits, leading to death. The causes of PEM are not fully understood, but studies have explored factors such as oxygen delivery, ion regulation, hormone signalling, and cardiac function. Improved data collection methods and experimental protocols have contributed to our understanding of PEM and have informed management actions. While progress has been made, there is still much to uncover through future research.
FISH AND FISHERIES
(2022)