Lipid rafts have been isolated on the basis of their resistance to various detergents and more recently by using detergent-free procedures. The actin cytoskeleton is now recognized as a dynamic regulator of lipid raft stability. We carefully analyzed the effects of the cortical actin-disrupting agent latrunculin B on lipid raft markers of both protein and lipid nature and show that two detergent-free membrane subtypes can be isolated and separated from each other on a one-step density gradient combined with pooling of the appropriate gradient fractions. These two subtypes differ in their dependence on the cortical actin cytoskeleton.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.ab.2013.03.018 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The link between respiratory syncytial virus (RSV) morphogenesis and virus transmission: Towards a paradigm for understanding RSV transmission in the upper airway.
Virology
January 2025
LKC School of Medicine, Nanyang Technological University, 11 Mandalay Road, Singapore, 308232, Republic of Singapore.
Respiratory syncytial virus (RSV) particle assembly occurs on the surface of infected cells at specialized membrane domain called lipid rafts. The mature RSV particles assemble as filamentous projections called virus filaments, and these structures form on the surface of many permissive cell types indicating that this is a robust feature of the RSV particle assembly. The virus filaments also form on nasal airway organoids systems providing evidence that these structures also have a clinical relevance.
View Article and Find Full Text PDFUnveiling the Mechanisms of a Remission in Major Depressive Disorder (MDD)-like Syndrome: The Role of Hippocampal Palmitoyltransferase Expression and Stress Susceptibility.
Biomolecules
January 2025
Research and Education Resource Center, Peoples Friendship University of Russia (RUDN University), 117198 Moscow, Russia.
Post-translational modifications of proteins via palmitoylation, a thioester linkage of a 16-carbon fatty acid to a cysteine residue, reversibly increases their affinity for cholesterol-rich lipid rafts in membranes, changing their function. Little is known about how altered palmitoylation affects function at the systemic level and contributes to CNS pathology. However, recent studies suggested a role for the downregulation of palmitoyl acetyltransferase (DHHC) 21 gene expression in the development of Major Depressive Disorder (MDD)-like syndrome.
View Article and Find Full Text PDFLipid Rafts in Signalling, Diseases, and Infections: What Can Be Learned from Fluorescence Techniques?
Membranes (Basel)
January 2025
Department of Mathematics, Computer Science, Physics and Earth Science, University of Messina, Viale Stagno D'Alcontres 31, 98166 Messina, Italy.
Lipid rafts are dynamic microdomains in the membrane, rich in cholesterol and sphingolipids, that are critical for biological processes like cell signalling, membrane trafficking, and protein organization. Their essential role is claimed in both physiological and pathological conditions, including cancer, neurodegenerative diseases, and viral infections, making them a key area of research. Fluorescence-based approaches, including super-resolution fluorescence microscopy techniques, enable precise analysis of the organization, dynamics, and interactions of these microdomains, thanks also to the innovative design of appropriate fluorescent probes.
View Article and Find Full Text PDFVisualization of Apical-Basal Stress Polarity Regulating Directed Cell Migration with a FRET-Based Biosensor.
ACS Sens
January 2025
Cancer Hospital of Dalian University of Technology, Shenyang 110042, China.
Intracellular morphological apical-basal polarity, regulated by conserved polarity proteins, plays a crucial role in cell migration and metastasis. In this study, using a genetically encoded Förster resonance energy transfer (FRET) biosensor to visually present the spatiotemporal stress state between the lipid rafts on the membrane and the linked actin, we first provide the evidence for the existence of intrinsic apical-basal stress polarity in tumor cells and demonstrate that this polarity is a prerequisite for the formation of flow-induced front-back stress polarity. Interestingly, our study revealed that the front-back stress polarity disappeared upon the disruption of intrinsic apical-basal stress discrepancy, resulting in a large attenuated cell migration activity reduced from 76.
View Article and Find Full Text PDFRNAi-based ALOX15B silencing augments keratinocyte inflammation in vitro via EGFR/STAT1/JAK1 signalling.
Cell Death Dis
January 2025
Faculty of Medicine, Institute of Biochemistry I, Goethe University Frankfurt, Frankfurt, Germany.
Arachidonate 15-lipoxygenase type B (ALOX15B) peroxidises polyunsaturated fatty acids to their corresponding fatty acid hydroperoxides, which are subsequently reduced into hydroxy-fatty acids. A dysregulated abundance of these biological lipid mediators has been reported in the skin and blood of psoriatic compared to healthy individuals. RNAscope and immunohistochemistry revealed increased ALOX15B expression in lesional psoriasis samples.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!