Rare Diseases Symptoms Automatic Extraction

Wiskott-Aldrich Syndrome protein deficiency perturbs the homeostasis of B-cell compartment in humans.

[wiskott-aldrich syndrome]

Wiskott-Aldrich Syndrome protein (WASp) regulates the cytoskeleton in hematopoietic cells and mutations in its gene cause the Wiskott-Aldrich Syndrome (WAS), a primary immunodeficiency with microthrombocytopenia, eczema and a higher susceptibility to develop tumors. Autoimmune manifestations, frequently observed in WAS patients, are associated with an increased risk of mortality and still represent an unsolved aspect of the disease. B cells play a crucial role both in immune competence and self-tolerance and defects in their development and function result in immunodeficiency and/or autoimmunity. We performed a phenotypical and molecular analysis of central and peripheral B-cell compartments in WAS pediatric patients. We found a decreased proportion of immature B cells in the bone marrow correlating with an increased presence of transitional B cells in the periphery. These results could be explained by the defective migratory response of WAS B cells to SDF-1α, essential for the retention of immature B cells in the BM. In the periphery, we observed an unusual expansion of CD21(low) B-cell population and increased plasma BAFF levels that may contribute to the high susceptibility to develop autoimmune manifestations in WAS patients. WAS memory B cells were characterized by a reduced in vivo proliferation, decreased somatic hypermutation and preferential usage of IGHV4-34, an immunoglobulin gene commonly found in autoreactive B cells. In conclusion, our findings demonstrate that WASp-deficiency perturbs B-cell homeostasis thus adding a new layer of immune dysregulation concurring to the increased susceptibility to develop autoimmunity in WAS patients.

Diseases presenting "immunodeficiency" symptom

  • adrenal incidentaloma
  • allergic bronchopulmonary aspergillosis
  • cushing syndrome
  • dracunculiasis
  • hirschsprung disease
  • hodgkin lymphoma, classical
  • homocystinuria without methylmalonic aciduria
  • kabuki syndrome
  • legionellosis
  • malignant atrophic papulosis
  • oculocutaneous albinism
  • omenn syndrome
  • papillon-lefèvre syndrome
  • primary effusion lymphoma
  • primary hyperoxaluria type 1
  • pyomyositis
  • severe combined immunodeficiency
  • sneddon syndrome
  • werner syndrome
  • wiskott-aldrich syndrome
  • wolf-hirschhorn syndrome
  • x-linked adrenoleukodystrophy

This symptom has already been validated