Article ; Online: Correlative light and electron microscopy reveals fork-shaped structures at actin entry sites of focal adhesions.
2022 Volume 11, Issue 11
Abstract: Focal adhesions (FAs) are the main cellular structures to link the intracellular cytoskeleton to the extracellular matrix. FAs mediate cell adhesion, are important for cell migration and are involved in many (patho)-physiological processes. Here we ... ...
Abstract | Focal adhesions (FAs) are the main cellular structures to link the intracellular cytoskeleton to the extracellular matrix. FAs mediate cell adhesion, are important for cell migration and are involved in many (patho)-physiological processes. Here we examined FAs and their associated actin fibres using correlative fluorescence and scanning electron microscopy (SEM). We used fluorescence images of cells expressing paxillin-GFP to define the boundaries of FA complexes in SEM images, without using SEM contrast enhancing stains. We observed that SEM contrast was increased around the actin fibre entry site in 98% of FAs, indicating increases in protein density and possibly also phosphorylation levels in this area. In nearly three quarters of the FAs, these nanostructures had a fork shape, with the actin forming the stem and the high-contrast FA areas the fork. In conclusion, the combination of fluorescent and electron microscopy allowed accurate localisation of a highly abundant, novel fork structure at the FA-actin interface. |
---|---|
MeSH term(s) | Focal Adhesions/metabolism ; Actins/metabolism ; Cytoskeleton/metabolism ; Cell Adhesion ; Microscopy, Electron |
Chemical Substances | Actins |
Language | English |
Publishing date | 2022-11-21 |
Publishing country | England |
Document type | Journal Article |
ZDB-ID | 2632264-X |
ISSN | 2046-6390 ; 2046-6390 |
ISSN (online) | 2046-6390 |
ISSN | 2046-6390 |
DOI | 10.1242/bio.059417 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
More links
Kategorien
Order via subito
This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.