Advances in the designing endoplasmic reticulum-targeted fluorescent probes

Area of Science:

• Cell Biology
• Biochemistry
• Molecular Imaging

Background:

• The endoplasmic reticulum (ER) is crucial for protein folding, lipid metabolism, and calcium homeostasis.
• ER dysfunction is linked to diseases like cancer, neurodegenerative disorders, and metabolic conditions.
• Fluorescent probes are advancing molecular imaging of ER physicochemical parameters and biological processes.

Purpose of the Study:

• To systematically review and organize ER-targeted fluorescent probes.
• To categorize probes based on targeting strategy and structure-activity relationships.
• To provide a framework for understanding probe utility in ER research and disease contexts.

Main Methods:

• Literature review and synthesis of existing research on ER-targeted probes.
• Classification of probes into six functional groups based on targeting and structure.
• Analysis of structure-activity relationships for probe design and application.

Main Results:

• Probes are categorized into six functional groups: peptide-linked, enzyme-specific, ROS-sensitive, viscosity-sensitive, morphology/identity probes, and disease-specific biosensors.
• The review emphasizes targeting strategies and structure-activity relationships for probe development.
• This organization complements existing classifications based solely on probe type or analyte.

Conclusions:

• A structured understanding of ER-targeted probes based on targeting and structure is essential for advancing ER research.
• These probes offer powerful tools for monitoring ER function, dysfunction, and disease.
• This classification facilitates the rational design and selection of probes for specific biological questions and therapeutic applications.