Development of an activity-based chemiluminogenic probe for γ-glutamylcyclotransferase

Area of Science:

• Biochemistry
• Molecular Biology
• Oncology

Background:

• γ-glutamylcyclotransferase (GGCT) is linked to cancer cell proliferation, but its enzymatic activity's role in cancer growth regulation is not fully understood.
• Understanding GGCT's in vivo function is crucial for cancer research.

Purpose of the Study:

• To develop a novel cell-permeable chemiluminogenic probe for detecting intracellular GGCT activity.
• To apply this probe for in vivo imaging of GGCT activity in cancer models.

Main Methods:

• Development of a chemiluminogenic probe (LISA-103) for sensitive detection of recombinant GGCT activity.
• Design of a cell-permeable GGCT probe (MAM-LISA-103).
• Application of MAM-LISA-103 to detect intracellular GGCT activity in NIH-3T3 cells and for in vivo tumor imaging in a mouse xenograft model.

Main Results:

• The probe LISA-103 effectively detected recombinant GGCT activity via chemiluminescence.
• MAM-LISA-103 successfully visualized intracellular GGCT activity in GGCT-overexpressing cells.
• MAM-LISA-103 demonstrated efficacy in in vivo tumor imaging in a mouse model.

Conclusions:

• MAM-LISA-103 is a valuable tool for detecting intracellular GGCT activity.
• This probe facilitates in vivo imaging, aiding the study of GGCT's role in cancer.
• The findings open new avenues for investigating GGCT in cancer biology and potential therapeutic strategies.