Visualizing single molecules in living Dictyostelium cells using total internal reflection fluorescent microscopy...

Area of Science:

• Cell biology
• Biophysics
• Microscopy

Background:

• Environmental stimuli trigger cell membrane signaling events.
• Understanding these events requires observing molecular behavior in real-time.
• Stochastic dynamics of signaling molecules are crucial for cellular responses.

Purpose of the Study:

• To detail a protocol for visualizing single fluorescent molecules at cell membranes.
• To enable the study of molecular-level signaling events in living cells.
• To provide a method applicable to various cell types, including Dictyostelium.

Main Methods:

• Utilized objective-type total internal reflection fluorescent microscopy (TIRFM).
• Focused on visualizing single fluorescent molecules in living Dictyostelium cells.
• Applied TIRFM to observe real-time molecular events at the cell membrane.

Main Results:

• Successfully visualized single fluorescent molecules in living Dictyostelium.
• Demonstrated the capability of TIRFM to observe membrane signaling events at the molecular level.
• Established a protocol for objective-type TIRFM in live-cell imaging.

Conclusions:

• Objective-type TIRFM is an effective method for observing single-molecule dynamics in living cells.
• This technique provides insights into the stochastic nature of cell signaling.
• The described protocol is adaptable for studying various cell types and their responses to stimuli.