Molecular Windows into the Brain: Advances in BBB-Penetrable NIR Fluorescent Imaging Probes

Area of Science:

• Neuroscience
• Medical Imaging
• Biochemistry

Background:

• The blood-brain barrier (BBB) limits brain diagnostics and therapeutics.
• Neurological disorders like Alzheimer's disease (AD) and Parkinson's disease (PD) require advanced imaging.
• Near-infrared (NIR) fluorescent probes offer potential for noninvasive brain visualization.

Purpose of the Study:

• To review recent advancements in BBB-penetrable NIR fluorescent probes.
• To discuss design strategies and mechanisms for neurological condition imaging.
• To highlight applications in detecting disease-specific biomarkers.

Main Methods:

• Systematic review of literature on NIR probe development.
• Analysis of probe design, working mechanisms, and BBB penetration.
• Evaluation of probe applications in preclinical and clinical studies.

Main Results:

• NIR probes demonstrate potential for noninvasive in vivo imaging of brain disorders.
• Specific probe designs facilitate BBB crossing and biomarker detection.
• Advances enable imaging of depression, epilepsy, stroke, glioma, AD, and PD.

Conclusions:

• BBB-penetratable NIR probes are crucial for early diagnosis of brain diseases.
• Further development is needed to overcome current limitations for clinical translation.
• NIR probes promise improved therapeutic interventions and patient outcomes.