Rare Diseases Symptoms Automatic Extraction

HIV-1 triggers WAVE2 phosphorylation in primary CD4 T cells and macrophages, mediating Arp2/3-dependent nuclear migration.

[wiskott-aldrich syndrome]

The human immunodeficiency virus type 1 (HIV-1) initiates receptor signaling and early actin dynamics during viral entry. This process is required for viral infection of primary targets such as resting CD4 T cells. WAVE2 is a component of a multiprotein complex linking receptor signaling to dynamic remodeling of the actin cytoskeleton. WAVE2 directly activates Arp2/3, leading to actin nucleation and filament branching. Although several bacterial and viral pathogens target Arp2/3 for intracellular mobility, it remains unknown whether HIV-1 actively modulates the Arp2/3 complex through virus-mediated receptor signal transduction. Here we report that HIV-1 triggers WAVE2 phosphorylation at serine 351 through gp120 binding to the chemokine coreceptor CXCR4 or CCR5 during entry. This phosphorylation event involves both Gαi-dependent and -independent pathways, and is conserved both in X4 and R5 viral infection of resting CD4 T cells and primary macrophages. We further demonstrate that inhibition of WAVE2-mediated Arp2/3 activity through stable shRNA knockdown of Arp3 dramatically diminished HIV-1 infection of CD4 T cells, preventing viral nuclear migration. Inhibition of Arp2/3 through a specific inhibitor, CK548, also drastically inhibited HIV-1 nuclear migration and infection of CD4 T cells. Our results suggest that Arp2/3 and the upstream regulator, WAVE2, are essential co-factors hijacked by HIV for intracellular migration, and may serve as novel targets to prevent HIV transmission.

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