A cell apoptosis probe based on fluorogen with aggregation induced emission characteristics

Area of Science:

• Biochemistry
• Cell Biology
• Chemical Biology

Background:

• Apoptosis, or programmed cell death, is crucial for development and tissue homeostasis.
• Accurate detection of apoptotic cells is vital for understanding diseases like cancer and neurodegeneration.
• Current methods for apoptosis detection can be limited in sensitivity or specificity.

Purpose of the Study:

• To design and synthesize a novel fluorogen-based probe for detecting apoptosis.
• To investigate the probe's selective fluorescence in different stages of apoptosis.
• To differentiate apoptotic cells from healthy cells using the probe.

Main Methods:

• Synthesis of a zinc-dipicolylamine (AIE-ZnDPA) probe with aggregation-induced emission (AIE) characteristics.
• Testing the probe's response to healthy cells versus apoptotic cells (early and late stages).
• Evaluating the probe's localization within cells at different apoptotic stages.

Main Results:

• The AIE-ZnDPA probe selectively fluoresces in early-stage apoptotic cell membranes and late-stage apoptotic cell nuclei.
• Healthy cells do not exhibit fluorescence with the AIE-ZnDPA probe.
• The precursor probe (AIE-DPA) without zinc coordination stains healthy cells and binds to lipid droplets.

Conclusions:

• The developed AIE-ZnDPA probe is a selective and sensitive tool for identifying apoptotic cells.
• The probe's differential fluorescence in early and late-stage apoptosis allows for stage-specific detection.
• This probe offers a valuable advancement for apoptosis research and diagnostics.