title: [Toll-like receptor-mediated functional activity of mononuclear cells in children with neutropenia].
abstract: OBJECTIVE
  To study the Toll-like receptor (TLR)-mediated functional activity of peripheral blood mononuclear cells (PBMC) from children with different forms of neutropenia.
  
  
  METHODS
  TLR-mediated functional activity of PBMC was evaluated by production of proinflammatory cytokines--TNF alpha and IFN alpha. Ligands for TLR1/2, TLR 2/6, TLR4, TLR5, and TLR9 were used to stimulate TNF alpha production by PBMC from healthy children and children with neutropenia. Ligands for TLR3, TLR4, TLR7, TLR7/8, TLR8, and TLR9 were used to induce production of IFN alpha. Levels of TNF alpha and IFN alpha were measured in PBMC supernatants by ELISA. The group of patients with neutropenia included 9 children with immune neutropenia and 3 children with congenital neutropenia. Control group consisted of 12 healthy children of the same age range.
  
  
  RESULTS
  It was revealed that TLR2, TLR4, and TLR5 ligands have enhanced stimulating effect on TNF alpha production by PBMC of children with congenital neutropenia and had no effect on PBMC of children with immune neutropenia. Children with immune neutropenia are characterized by significantly increased IFN alpha production induced by ligands of TLR3, TLR8, and TLR9.
  
  
  CONCLUSIONS
  Revealed changes of TLR-mediated functional activity of PBMC from children with various forms of neutropenia may play significant role in development and course of infections in these patients.
authors.forename: L V
authors.initials: LV
authors.lastname: Koval'chuk
authors.forename: M V
authors.initials: MV
authors.lastname: Khoreva
authors.forename: A S
authors.initials: AS
authors.lastname: Nikonova
authors.forename: N A
authors.initials: NA
authors.lastname: Finogenova
authors.forename: E A
authors.initials: EA
authors.lastname: Mamedova
authors.forename: T V
authors.initials: TV
authors.lastname: Polovtseva
authors.forename: L Ia
authors.initials: LIa
authors.lastname: Fetisova
authors.forename: L A
authors.initials: LA
authors.lastname: Gracheva
authors.forename: N G
authors.initials: NG
authors.lastname: Goldyreva
mesh_terms: D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D016898:Interferon-alpha / Q000096:biosynthesis; D007963:Leukocytes, Mononuclear / Q000276:immunology*; D008297:Male; D009503:Neutropenia / Q000276:immunology*; D051193:Toll-Like Receptors / Q000276:immunology*; D014409:Tumor Necrosis Factor-alpha / Q000096:biosynthesis
chemical_list: D016898:Interferon-alpha; D051193:Toll-Like Receptors; D014409:Tumor Necrosis Factor-alpha