Molecular PET Imaging of Cyclophosphamide Induced Apoptosis with 18F-ML-8

Area of Science:

• Molecular Imaging
• Radiochemistry
• Oncology

Background:

• Apoptosis imaging is crucial for evaluating cancer treatment efficacy.
• Existing imaging probes may lack specificity or sensitivity for apoptotic cells.
• The ApoSense family of probes targets apoptotic cells.

Purpose of the Study:

• To develop and evaluate a novel small-molecular positron emission tomography (PET) imaging probe for apoptosis.
• To assess the capability of the new probe, (18)F-ML-8, in specifically imaging apoptotic regions in a tumor model.
• To confirm the probe's performance using in vitro and in vivo assays.

Main Methods:

• Synthesis and characterization of the novel malonate-based PET probe, (18)F-ML-8.
• In vivo imaging studies in CTX-treated tumor-bearing mice.
• In vitro cell binding assays and TUNEL staining for validation.

Main Results:

• (18)F-ML-8 demonstrated specific uptake in apoptotic regions of tumors.
• In vitro assays confirmed the probe's binding to apoptotic cells.
• TUNEL staining corroborated the presence of apoptosis in targeted regions.

Conclusions:

• (18)F-ML-8 is a promising PET imaging agent for detecting apoptosis.
• The probe enables noninvasive visualization of chemotherapy-induced apoptosis.
• This tracer holds potential for monitoring antitumor treatment response.