A Fluorogenic Green Merocyanine-Based Probe to Detect Heparanase-1 Activity.

Area of Science:

• Biochemistry and Molecular Biology
• Chemical Biology
• Enzymology

Background:

• Heparanase-1 (HPSE-1) is a key enzyme involved in extracellular matrix remodeling, regulating cell migration, angiogenesis, and wound healing.
• Overexpression of HPSE-1 is linked to various pathologies, including cancer and inflammatory diseases, making it a significant therapeutic target.
• The exploration of HPSE-1's biological functions is hindered by a lack of specific research tools, particularly for activity-based assays.

Approach:

• Designed and synthesized a novel fluorogenic disaccharide-based probe specifically targeting HPSE-1 activity.
• Employed a rational design strategy involving tuning the electronic effect of the aryl aglycon to optimize probe performance.
• Utilized fluorescence spectroscopy and imaging to characterize the probe's response to HPSE-1.

Key Points:

• The novel probe demonstrates a highly sensitive 278-fold fluorescence turn-on response upon interaction with recombinant human HPSE-1.
• The probe emits green fluorescence at 560 nm, facilitating clear visualization and detection.
• This new tool enables effective fluorescence imaging of HPSE-1 enzymatic activity within cellular environments.

Conclusions:

• The developed fluorogenic probe significantly expands the available chemical toolkit for interrogating HPSE-1 activity.
• This probe offers a sensitive and specific method for studying HPSE-1's role in biological processes and disease.
• It paves the way for further research into HPSE-1 as a therapeutic target and for diagnostic applications.