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Mass spectrometers as cryoEM grid preparation instruments
Curr Opin Struct Biol. 2023 Sep 11;83:102699. doi: 10.1016/j.sbi.2023.102699. Online ahead of print.ABSTRACTStructure determination by single-particle cryoEM has matured into a core structural biology technique. Despite many methodological advancements, most cryoEM grids are still prepared using the plunge-freezing method developed ∼40 years ago. Embedding samples in thin films and exposing them to the air-water interface often leads to sample damage and preferential orientation of the particles. Using native mass spectrometry to create cryoEM samples, potentially avoids these problems and allows the use of mass spectrom...
Source: Current Opinion in Structural Biology - September 13, 2023 Category: Biology Authors: Michael S Westphall Kenneth W Lee Austin Z Salome Joshua J Coon Timothy Grant Source Type: research
Evolution of immunity networks across embryophytes
Curr Opin Plant Biol. 2023 Sep 11:102450. doi: 10.1016/j.pbi.2023.102450. Online ahead of print.ABSTRACTLand plants (embryophytes), including vascular (tracheophytes) and non-vascular plants (bryophytes), co-evolved with microorganisms since descendants of an algal ancestor colonized terrestrial habitats around 500 million years ago. To cope with microbial pathogen infections, embryophytes evolved a complex immune system for pathogen perception and activation of defenses. With the growing number of sequenced genomes and transcriptome datasets from algae, bryophytes, tracheophytes, and available plant models, comparative an...
Source: Current Opinion in Plant Biology - September 13, 2023 Category: Biology Authors: In és Ponce de León Source Type: research
On ability of perch to colonize new waterbodies < em > - < /em > indirect evidence and sticky facts. A Comment on: 'Multiple lines and levels of evidence for avian zoochory promoting fish colonization of artificial lakes' (2023), by Garcia < em > et al < /em >
Biol Lett. 2023 Sep;19(9):20230233. doi: 10.1098/rsbl.2023.0233. Epub 2023 Sep 13.NO ABSTRACTPMID:37700702 | PMC:PMC10498351 | DOI:10.1098/rsbl.2023.0233
Source: Biology Letters - September 13, 2023 Category: Biology Authors: Anti Vasem ägi Magnus Huss Anna G årdmark Mikhail Ozerov Source Type: research
No phylogenetic evidence for angiosperm mass extinction at the Cretaceous-Palaeogene (K-Pg) boundary
Biol Lett. 2023 Sep;19(9):20230314. doi: 10.1098/rsbl.2023.0314. Epub 2023 Sep 13.ABSTRACTThe Cretaceous-Palaeogene mass extinction event (K-Pg) witnessed upwards of 75% of animal species going extinct, most notably among these are the non-avian dinosaurs. A major question in macroevolution is whether this extinction event influenced the rise of flowering plants (angiosperms). The fossil record suggests that the K-Pg event had a strong regional impact on angiosperms with up to 75% species extinctions, but only had a minor impact on the extinction rates of major lineages (families and orders). Phylogenetic evidence for angi...
Source: Biology Letters - September 13, 2023 Category: Biology Authors: Jamie B Thompson Santiago Ram írez-Barahona Source Type: research
Preliminary evidence of an increased susceptibility to face pareidolia in postpartum women
Biol Lett. 2023 Sep;19(9):20230126. doi: 10.1098/rsbl.2023.0126. Epub 2023 Sep 13.ABSTRACTAs primates, we are hypersensitive to faces and face-like patterns in the visual environment, hence we often perceive illusory faces in otherwise inanimate objects, such as burnt pieces of toast and the surface of the moon. Although this phenomenon, known as face pareidolia, is a common experience, it is unknown whether our susceptibility to face pareidolia is static across our lifespan or what factors would cause it to change. Given the evidence that behaviour towards face stimuli is modulated by the neuropeptide oxytocin (OT), we re...
Source: Biology Letters - September 13, 2023 Category: Biology Authors: Jessica Taubert Samantha Wally Barnaby J Dixson Source Type: research
A biosemiotic interpretation of certain genital morphological structures in the spiders Dysdera erythrina and Dysdera crocata (Araneae: Dysderidae)
Theory Biosci. 2023 Sep 13. doi: 10.1007/s12064-023-00404-1. Online ahead of print.ABSTRACTA biosemiotic approach to the interpretation of morphological data is apt to highlight morphological traits that have hitherto gone unnoticed for their crucial roles in intraspecific sign interpretation and communication processes. Examples of such traits include specific genital structures found in the haplogyne spiders Dysdera erythrina (Walckenaer 1802) and Dysdera crocata (Koch 1838). In both D. erythrina and D. crocata, the distal sclerite of the male bulb and the anterior diverticulum of the female endogyne exhibit a striking, ...
Source: Theory in Biosciences - September 13, 2023 Category: Biology Authors: Joachim Schult Onno Preik Stefan Kirschner Frank Friedrich Source Type: research
Exploring synchrony effects in performance on tasks involving cognitive inhibition: An online study of young adults
Chronobiol Int. 2023 Sep 12:1-15. doi: 10.1080/07420528.2023.2256843. Online ahead of print.ABSTRACTInhibition is one of the core components of cognitive control. In experimental tasks which measure cognitive inhibition, performance may vary according to an interplay of individuals' chronotype and the time of day of testing ("synchrony effect", or the beneficial impact on cognitive performance of aligning testing with the time of day preferred by an individual's chronotype). Some prior studies have reported a synchrony effect specifically emerging in activities which require cognitive inhibition, but not in general process...
Source: Chronobiology International - September 13, 2023 Category: Biology Authors: Hayley Tseng Markus F Damian Source Type: research
Chronotype and lipid metabolism in Arctic Sojourn Workers
This study relates answers to the Munich Chronotype Questionnaire (MCTQ) and Pittsburgh Sleep Quality Index (PSQI) from Arctic Sojourn Workers (ASW) of Yamburg Settlement, 68° Latitude North, 75° Longitude East (n = 180; mean age ± SD; range: 49.2 ± 7.8; 25-66 y; 45% women) to Arctic Sojourn Work Experience (ASWE), age and health status. Chronotype, Mid Sleep on Free Days sleep corrected (MSFsc) and sleep characteristics of ASW were compared to those of age-matched Tyumen Residents (TR, n = 270; mean age ± SD; range: 48.4 ± 8.4; 25-69 y; 48% women), 57° Latitude North, 65° Longitude East. ASW have earlier MSFsc tha...
Source: Chronobiology International - September 13, 2023 Category: Biology Authors: Denis Gubin Alexander Vetoshkin Nina Shurkevich Ludmila Gapon Mikhail Borisenkov Germaine Cornelissen Dietmar Weinert Source Type: research
Impact of the early months of the COVID-19 pandemic on the sleep patterns of a Brazilian population sample
Chronobiol Int. 2023 Sep 12:1-13. doi: 10.1080/07420528.2023.2255667. Online ahead of print.ABSTRACTHumanitarian and health crisis have drastic effects on the physical and mental well-being of people. The COVID-19 pandemic forced many countries to impose containment measures on its population to halt the spread of the new coronavirus (SARS-CoV-2). This aim of this study was to explore self-reported sleep quality and insomnia symptoms in a sample of the Brazilian population before and during the COVID-19 quarantine period. Our data was collected through online questionnaires, including the Pittsburgh Sleep Quality Index, th...
Source: Chronobiology International - September 13, 2023 Category: Biology Authors: Sergio Brasil Tufik Gabriel Natan Pires Allan Saj Porcacchia Andr éia Gomes Bezerra Monica Levy Andersen Sergio Tufik Source Type: research
Exploring synchrony effects in performance on tasks involving cognitive inhibition: An online study of young adults
Chronobiol Int. 2023 Sep 12:1-15. doi: 10.1080/07420528.2023.2256843. Online ahead of print.ABSTRACTInhibition is one of the core components of cognitive control. In experimental tasks which measure cognitive inhibition, performance may vary according to an interplay of individuals' chronotype and the time of day of testing ("synchrony effect", or the beneficial impact on cognitive performance of aligning testing with the time of day preferred by an individual's chronotype). Some prior studies have reported a synchrony effect specifically emerging in activities which require cognitive inhibition, but not in general process...
Source: Chronobiology International - September 13, 2023 Category: Biology Authors: Hayley Tseng Markus F Damian Source Type: research
Chronotype and lipid metabolism in Arctic Sojourn Workers
This study relates answers to the Munich Chronotype Questionnaire (MCTQ) and Pittsburgh Sleep Quality Index (PSQI) from Arctic Sojourn Workers (ASW) of Yamburg Settlement, 68° Latitude North, 75° Longitude East (n = 180; mean age ± SD; range: 49.2 ± 7.8; 25-66 y; 45% women) to Arctic Sojourn Work Experience (ASWE), age and health status. Chronotype, Mid Sleep on Free Days sleep corrected (MSFsc) and sleep characteristics of ASW were compared to those of age-matched Tyumen Residents (TR, n = 270; mean age ± SD; range: 48.4 ± 8.4; 25-69 y; 48% women), 57° Latitude North, 65° Longitude East. ASW have earlier MSFsc tha...
Source: Chronobiology International - September 13, 2023 Category: Biology Authors: Denis Gubin Alexander Vetoshkin Nina Shurkevich Ludmila Gapon Mikhail Borisenkov Germaine Cornelissen Dietmar Weinert Source Type: research
Impact of the early months of the COVID-19 pandemic on the sleep patterns of a Brazilian population sample
Chronobiol Int. 2023 Sep 12:1-13. doi: 10.1080/07420528.2023.2255667. Online ahead of print.ABSTRACTHumanitarian and health crisis have drastic effects on the physical and mental well-being of people. The COVID-19 pandemic forced many countries to impose containment measures on its population to halt the spread of the new coronavirus (SARS-CoV-2). This aim of this study was to explore self-reported sleep quality and insomnia symptoms in a sample of the Brazilian population before and during the COVID-19 quarantine period. Our data was collected through online questionnaires, including the Pittsburgh Sleep Quality Index, th...
Source: Chronobiology International - September 13, 2023 Category: Biology Authors: Sergio Brasil Tufik Gabriel Natan Pires Allan Saj Porcacchia Andr éia Gomes Bezerra Monica Levy Andersen Sergio Tufik Source Type: research
LPS induces SGPP2 to participate metabolic reprogramming in endothelial cells
In this study, the effects of 1 μg/ml of LPS on the metabolism of human umbilical vein endothelial cells (HUVECs) were investigated, and the metabolic changes after LPS stimulation were explained from the perspective of mRNA expression, chromatin openness and metabolic flux. We found changes in the central metabolism of endothelial cells after LPS stimulation, such as enhanced glycolysis function, decreased mitochondrial membrane potential, and increased production of reactive oxygen species (ROS). Sphingolipid metabolic pathways change at the transcriptome level, and sphingosine-1-phosphatase 2 (SGPP2) was upregulated in...
Source: Free Radical Biology and Medicine - September 13, 2023 Category: Biology Authors: Xin Yi Meng-Ling Chang Zeng-Ding Zhou Lei Yi Hao Yuan Jin Qi Lei Yi Jing-Ning Huan Xiao-Qin Huang Source Type: research
Kaempferol stimulation of autophagy regulates the ferroptosis under the oxidative stress as mediated with AMP-activated protein kinase
In conclusion, KP provides hepatoprotective effects against oxidative stress induced by AA + iron treatment in vitro and CCl4 treatment in vivo.PMID:37703935 | DOI:10.1016/j.freeradbiomed.2023.09.008
Source: Free Radical Biology and Medicine - September 13, 2023 Category: Biology Authors: Min-Jin Kim Yu-Rim Song Young Eun Kim Su-Jin Bae Won-Yung Lee Seon-Been Bak Young Woo Kim Source Type: research
LPS induces SGPP2 to participate metabolic reprogramming in endothelial cells
In this study, the effects of 1 μg/ml of LPS on the metabolism of human umbilical vein endothelial cells (HUVECs) were investigated, and the metabolic changes after LPS stimulation were explained from the perspective of mRNA expression, chromatin openness and metabolic flux. We found changes in the central metabolism of endothelial cells after LPS stimulation, such as enhanced glycolysis function, decreased mitochondrial membrane potential, and increased production of reactive oxygen species (ROS). Sphingolipid metabolic pathways change at the transcriptome level, and sphingosine-1-phosphatase 2 (SGPP2) was upregulated in...
Source: Free Radical Biology and Medicine - September 13, 2023 Category: Biology Authors: Xin Yi Meng-Ling Chang Zeng-Ding Zhou Lei Yi Hao Yuan Jin Qi Lei Yi Jing-Ning Huan Xiao-Qin Huang Source Type: research
