Structure based innovative approach to analyze aptaprobe-GPC3 complexes in hepatocellular carcinoma

Area of Science:

• Biochemistry
• Molecular Biology
• Medical Diagnostics

Background:

• Glypican-3 (GPC3) is a crucial biomarker for hepatocellular carcinoma (HCC) progression.
• Aptamers are emerging as specific diagnostic tools for clinical applications.
• This study focuses on developing aptaprobe platforms for GPC3 detection.

Purpose of the Study:

• To design and validate 3D structure-based aptaprobe platforms for detecting GPC3.
• To explore aptaprobe applications in HCC diagnostics, including aptablotting, ALISA, and imaging.

Main Methods:

• Selection of 12 high-affinity aptamer candidates targeting GPC3.
• Structure-based analysis to identify aptatopic residues and select sandwichable aptaprobes.
• Validation of aptaprobe specificity using Aptablotting and aptaprobe-based sandwich assay (ALISA).
• In vivo imaging analysis in HCC xenograft models.

Main Results:

• Identified 12 aptamer candidates with high affinity and specificity for GPC3.
• Structural analysis guided the selection of optimal aptaprobes for diagnostic assays.
• Aptablotting and ALISA confirmed the specificity of aptaprobes for HCC diagnostics.
• Aptaprobe-based imaging demonstrated GPC3 specificity in HCC xenograft models, suggesting potential for imaging diagnosis.

Conclusions:

• Aptaprobe platforms offer a promising approach for GPC3 detection.
• These platforms have potential as affinity reagents for both in vitro and in vivo diagnostic systems.
• The study highlights a new avenue for HCC imaging diagnosis.