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Nanopodia – Thin, Fragile Membrane Projections with Roles in Cell Movement and Intercellular Interactions

作者： Chi-Iou Lin1, Chun-Yee Lau1, Dan Li1, Shou-Ching Jaminet1 1Center for Vascular Biology Research, Department of of Pathology, Beth Israel Deaconess Medical Center,Harvard Medical School
简介：

Overview

This article describes a procedure to visualize nanopodia, which are fragile membrane extensions that can reach up to 100 μm from a cell. The method involves immunofluorescent staining of cultured cells to observe these structures.

Key Study Components

Area of Science

  • Cell Biology
  • Neuroscience
  • Immunofluorescence

Background

  • Nanopodia are thin membrane channels that sense the cellular environment.
  • They can be found at the leading front or trailing rear of a cell.
  • Proper fixation and washing techniques are crucial for their observation.
  • Avoiding organic solvents is essential to maintain the integrity of these structures.

Purpose of Study

  • To visualize nanopodia in cultured cells.
  • To enhance understanding of cellular interactions and behaviors.
  • To provide a reliable method for studying these cellular extensions.

Methods Used

  • Culturing cells on collagen-coated glass discs.
  • Fixing cells with warm PFA.
  • Washing and incubating cells in blocking buffer.
  • Staining with antibodies against TM4SF1 and mounting on glass slides.

Main Results

  • Successful visualization of nanopodia extensions in cultured cells.
  • Demonstration of the method's effectiveness in observing cellular structures.
  • Insights into the dynamics of mobile proliferating or interacting cells.
  • Potential applications in further cellular biology research.

Conclusions

  • The procedure allows for effective visualization of nanopodia.
  • Immunofluorescence microscopy is a valuable tool in cell biology.
  • Understanding nanopodia can lead to insights into cellular behavior.

Frequently Asked Questions

What are nanopodia?
Nanopodia are thin, fragile membrane extensions that help cells sense their environment.
Why is proper fixation important?
Proper fixation preserves the structure of nanopodia for accurate visualization.
What is the role of immunofluorescence in this study?
Immunofluorescence allows for the specific staining and visualization of nanopodia in cells.
How are cells prepared for staining?
Cells are cultured, fixed, washed, and incubated in blocking buffer before staining.
What can be learned from studying nanopodia?
Studying nanopodia can provide insights into cell interactions and behaviors.

Nanopodia are thin but fragile membrane channels that extend up to 100 μm from a cell's leading front or trailing rear and sense the cellular environment. Direct fixation at 37 °C, gentle washing, and avoidance of organic solvents like ethanol, methanol, or acetone and of higher Triton X-100 concentrations are required to observe these cellular structures.

标签: Nanopodia,    Thin Membrane Projections,    Cell Movement,    Intercellular Interactions,    TM4SF1,    TMED,    F-actin,    Endothelial Cells,    Cancer Cells,    Cell Polarization,    Cell Signaling,    Cell-cell Communication,   
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