Enhanced detection of ATTR amyloid using a nanofibril-based assay

Area of Science:

• Biochemistry
• Medical Diagnostics
• Nanotechnology

Background:

• Over 30 human diseases involve amyloid fibril formation.
• Transthyretin (TTR) amyloidosis (ATTR) affects vital organs like the heart and nervous system.
• Current detection methods (e.g., Congo red, immunofluorescence) are limited to large amyloid deposits.

Purpose of the Study:

• To develop an enhanced method for sensitive detection of ATTR amyloid.
• To enable early detection of small ATTR deposits for timely intervention.

Main Methods:

• Development of a novel detection system using functionalized protein nanofibrils.
• Application in microplate immunoassays for monomeric TTR detection.
• Immunofluorescence labeling of ex vivo patient tissues with ATTR aggregates.

Main Results:

• Achieved sensitive detection of monomeric TTR.
• Successfully labeled ATTR aggregates in ex vivo tissue from two patients.
• Validated the system on tissues from AA amyloidosis and inflamed mouse liver.

Conclusions:

• The developed system offers highly sensitive detection of microscopic ATTR amyloid deposits.
• This technology represents a significant advancement for early ATTR amyloidosis diagnosis.
• Potential for improved patient management and prevention of severe tissue damage.