Relationship between Capillaroscopic Architectural Patterns and Different Variant Subgroups in Fabry Disease:...

Area of Science:

• Vascular Biology and Genetics
• Lysosomal Storage Disorders
• Diagnostic Imaging

Background:

• Anderson-Fabry disease (AFD) is a genetic disorder impacting lysosomal function, leading to vascular damage.
• Current diagnostic methods may not fully capture microcirculatory alterations in AFD.
• Nailfold capillaroscopy is a non-invasive tool with potential for assessing microvascular changes.

Purpose of the Study:

• To evaluate nailfold capillaroscopy findings in Anderson-Fabry disease patients.
• To explore correlations between capillaroscopy results, GLA gene variants, and sex-specific differences.
• To assess the utility of capillaroscopy for early identification of multiorgan vascular involvement in AFD.

Main Methods:

• Retrospective observational study of 25 AFD patients.
• Assessment of nailfold capillaroscopy parameters including angiotectonic disorder, vascular areas, capillary density, and intimal thickening.
• Correlation analysis with GLA gene variant subgroups, enzyme activity, and Lyso-Gb3 levels.

Main Results:

• Significant differences in capillaroscopy findings were observed among GLA gene variant subgroups.
• Classic AFD variants showed reduced capillary length and signs of erythrocyte aggregation.
• Lyso-Gb3 levels correlated positively with average capillary length; sex-specific differences in neoangiogenesis and capillary length were noted.

Conclusions:

• Nailfold capillaroscopy is a valuable tool for the diagnostic process and clinical management of Anderson-Fabry disease.
• The technique can help differentiate AFD phenotypes based on GLA gene mutations.
• Capillaroscopy aids in the early diagnosis and monitoring of microvascular alterations in AFD patients.