Membrane contact sites (MCSs) are sites of close apposition between two organelles used to exchange ions, lipids, and information. Cells respond to changing environmental or developmental conditions by modulating the number, extent, or duration of MCSs. Because of their small size and dynamic nature, tools to study the dynamics of MCSs in live cells have been limited.
View Article and Find Full Text PDFCells adjust their metabolism by remodeling membrane contact sites that channel metabolites to different fates. Lipid droplet (LD)-mitochondria contacts change in response to fasting, cold exposure, and exercise. However, their function and mechanism of formation have remained controversial.
View Article and Find Full Text PDFEnviron Health Perspect
November 2022
Background: Egg development has unique features that render it vulnerable to environmental perturbation. The herbicide atrazine is an endocrine disruptor shown to have detrimental effects on reproduction across several vertebrate species.
Objectives: This study was designed to determine whether exposure to low levels of atrazine impairs meiosis in female mammals, using a mouse model; in particular, the study's researchers sought to determine whether and how the fidelity of oocyte chromosome segregation may be affected and whether aging-related aneuploidy is exacerbated.
Objective: To report the first eight cases of critically ill patients with coronavirus disease 2019 (COVID-19) in Hong Kong, describing the treatments and supportive care they received and their 28-day outcomes.
Design: Multicentre retrospective observational cohort study.
Setting: Three multidisciplinary intensive care units (ICUs) in Hong Kong.
Objective: Numerous studies have identified an association between headache disorders and vestibular symptoms, such as dizziness, vertigo, and motion sensitivity. Using bipolar, binaural galvanic vestibular stimulation (GVS), our objectives were to (1) determine the degree of vestibular sensitivity in borderline headache sufferers, and (2) characterize the postural response to vestibular perturbation in these individuals.
Methods: Fourteen volunteers participated in this study: 8 individuals with chronic headache (6 with migraine and 2 with tension type headache (TTH)), and 6 healthy control subjects.