Mitochondria-targeted fluorescent thermometer monitors intracellular temperature gradient.

Area of Science:

• Biophysics
• Cell Biology
• Microscopy

Background:

• Accurate intracellular temperature measurement is crucial for understanding cellular processes.
• Existing methods for microscopic thermometry have limitations.
• Mitochondria play a key role in cellular metabolism and temperature regulation.

Purpose of the Study:

• To develop and validate a novel small molecule fluorescent thermometer for mitochondria.
• To assess the capability of the thermometer in monitoring intracellular temperature gradients.
• To demonstrate its utility in various cell types under controlled heating conditions.

Main Methods:

• Synthesis of a small molecule fluorescent probe targeting mitochondria (Mito thermo yellow).
• Application of the probe in different cell lines.
• Induction of controlled intracellular heating.
• Microscopic imaging and fluorescence analysis to measure temperature.

Main Results:

• Mito thermo yellow successfully localized to mitochondria.
• The probe exhibited temperature-dependent fluorescence changes.
• Intracellular temperature gradients induced by exogenous heating were accurately monitored.
• The thermometer demonstrated efficacy across various cell types.

Conclusions:

• Mito thermo yellow is a viable tool for mitochondria-specific intracellular thermometry.
• This fluorescent thermometer enables visualization and quantification of temperature gradients at the microscopic level.
• The findings open new avenues for studying thermal dynamics within living cells.