Targeting Early Apoptosis in Acute Ischemic Stroke with a Small-Molecule Probe

Area of Science:

• Biomedical imaging
• Molecular biology
• Neuroscience

Background:

• Inhibiting early apoptotic cells can mitigate ischemic injury.
• Effective molecular imaging of early apoptosis is crucial for ischemic stroke treatment.
• Existing apoptosis probes lack specificity for early-stage apoptosis.

Purpose of the Study:

• To develop and evaluate a novel small-molecule probe, CYS-F, for targeting early apoptosis in ischemic stroke.
• To assess the in vitro and in vivo performance of CYS-F.
• To explore the utility of CYS-F in multimodal molecular imaging for stroke management.

Main Methods:

• Synthesis of CYS-F using cystine and fluorescein isothiocyanate dyes.
• Evaluation of CYS-F's targeting ability in vitro and in vivo.
• Utilizing fluorescence imaging and magnetic resonance imaging in stroke models.
• Pharmacokinetic analysis of CYS-F's blood half-life.

Main Results:

• CYS-F demonstrated excellent targeting of early apoptotic cells.
• CYS-F has a small molecular weight (1013 Da) and rapid clearance (1.325 h half-life).
• Multimodal imaging correlated with therapeutic effects and predicted stroke outcomes.

Conclusions:

• CYS-F is a versatile and effective molecular probe for early apoptosis detection in ischemic stroke.
• CYS-F facilitates comprehensive clinical decision-making in acute ischemic stroke.
• The probe enables dose-dependent assessment of therapeutic effects and early outcome prediction.