[Amyloid Registry Kiel : An interim balance].

Area of Science:

• Pathology
• Biochemistry
• Medical Diagnostics

Background:

• Amyloid comprises pathologic fibrillar protein aggregates in a cross-β-sheet conformation.
• Amyloidosis results from amyloid deposition, leading to cerebral and extracerebral diseases.
• 35 distinct amyloid proteins have been identified to date.

Purpose of the Study:

• To leverage the extensive case collection of the Amyloid Registry Kiel for insights into amyloidosis.
• To validate novel diagnostic dyes for amyloid detection.
• To analyze the characteristics and implications of various amyloid types.

Main Methods:

• Histological examination of over 6700 diverse amyloid and amyloidosis cases.
• Validation of luminescent conjugated polythiophenes for amyloid recognition.
• Analysis of amyloid in carpal tunnel syndrome, gastrointestinal biopsies, and cardiac biopsies.
• Application of MALDI mass spectrometry imaging for deposit complexity analysis.

Main Results:

• The registry provides unique insights into the rare disease of amyloidosis.
• Novel dyes (luminescent conjugated polythiophenes) show promise for histological diagnosis.
• Detailed analysis revealed patterns in gastrointestinal amyloid distribution and AL amyloid prognostic significance in cardiac biopsies.
• MALDI mass spectrometry imaging elucidated the complex, disease-specific protein/peptide composition of amyloid deposits.

Conclusions:

• The Amyloid Registry Kiel is a valuable resource for studying amyloidosis.
• Advanced histological and imaging techniques enhance amyloid diagnosis and understanding.
• Amyloid deposits are complex mixtures, with specific components offering diagnostic and prognostic value.