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Angiogenesis in alkaptonuria.

Lia Millucci1, Giulia Bernardini1, Barbara Marzocchi1

  • 1Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Via A. Moro, 2, 53100, Siena, Italy.

Journal of Inherited Metabolic Disease
|September 28, 2016
PubMed
Summary
This summary is machine-generated.

Alkaptonuria (AKU), a rare joint disease, shows significant new blood vessel formation (neoangiogenesis) in affected tissues. This discovery offers new therapeutic targets for AKU, moving beyond current palliative care.

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Area of Science:

  • Rheumatology
  • Genetics
  • Pathophysiology

Background:

  • Alkaptonuria (AKU) is a rare genetic disorder impacting joints.
  • Current AKU treatments are palliative, with limited understanding of its underlying pathology.
  • Neovascularization is implicated in the pathogenesis of related systemic inflammatory rheumatic diseases.

Purpose of the Study:

  • To investigate the presence and extent of neoangiogenesis in Alkaptonuria (AKU) synovial tissues.
  • To compare vascularization in AKU synovium with that of healthy controls.
  • To explore the expression of specific markers, including β-dystroglycan, in AKU synovial tissues.

Main Methods:

  • Histological analysis of synovial tissue samples from AKU patients and healthy individuals using hematoxylin and eosin staining.
  • Immunofluorescence microscopy employing endothelial cell markers to detect vascularization.
  • Western blotting and quantification analyses to assess the expression of endothelial cell markers and β-dystroglycan.

Main Results:

  • Significant vascularization was observed in the synovium of AKU patients, but not in healthy controls.
  • Strong expression of endothelial cell markers was confirmed in AKU synovial tissues.
  • High levels of β-dystroglycan were found in the vascular endothelium of AKU synovium.

Conclusions:

  • This study provides the first experimental evidence of new blood vessel formation (neoangiogenesis) in Alkaptonuria (AKU) synovial tissues.
  • The findings suggest that neoangiogenesis plays a role in AKU pathogenesis.
  • The presence of β-dystroglycan in AKU synovium opens new therapeutic avenues for Alkaptonuria.