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Monitoring autophagy by super-resolution structured illumination and direct stochastic optical reconstruction microscopy (CAT#: STEM-MIT-0377-LJX)

Introduction

Autophagy is a major protein degradation pathway responsible for the removal of primarily long-lived and misfolded proteins, contributing to cellular homeostasis. Autophagy dysfunction has been associated with the onset of various human pathologies. Visualizing key proteins that govern autophagy pathway activity, the molecular machinery and cargo is essential to elucidate roles and mechanisms of autophagy function. Although multiple fluorescence-based microscopy approaches exist to assess autophagy, the limit of resolution associated with light microscopy makes precise intracellular protein localization, interaction and molecular distribution challenging. The service describes a detailed protocol for both super-resolution structured illumination microscopy (SR-SIM) as well as direct stochastic optical reconstruction microscopy (dSTORM) for the visualization of key proteins associated with the autophagy molecular machinery and cargo.




Principle

Principles of stochastic optical reconstruction microscopy: By fitting the two-dimensional Gaussian function to determine the centroid of microscope-formed light spots, a single fluorescent source (such as a fluorescent group) can be located with high precision. The accuracy of the calculation to determine the centroid depends only on the number of photons collected, and the resolution scale can be tens of nanometers or smaller. To achieve this accuracy, the density of the fluorescent molecules being tested is required to be low enough that the spots of the two fluorescent groups are unlikely to overlap.

Applications

Imaging in two or three dimensions, in multiple colors, and even in living cells
Applied in many areas of the life sciences, and provides very high resolution images for many different needs from neuroscience to subcellular science

Procedure

1. Sampling
2. Preparation of slices
3. Staining (Select according to the specific experimental situation)
4. Observation

Materials

• Sample Type:
Autophagy cells

Notes

Operate in strict accordance with the operating procedures, and shall not arbitrarily change the operating procedures
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