title: The effect of lactic acid on mononuclear cell secretion of proinflammatory cytokines in response to group B streptococci.
abstract: This study found that lactate alone had a stimulatory effect (207.1 +/- 16.3%; P = .001) on tumor necrosis factor (TNF)-alpha production by human mononuclear cells with the most profound secretion being at pathologic concentrations of 4-8 mM lactate. Furthermore, exposure of these mononuclear cells to group B streptococci (GBS, 10(5) cfu) resulted in TNF-alpha production of up to 621.1 +/- 42% of control; the combination of lactic acid and GBS increased TNF-alpha production up to 1019.3 +/- 16.1% (P = .001). The combination of GBS and lactate also enhanced the secretion of interleukin (IL)-1beta and IL-6. Lactate in pathologic concentrations, therefore, likely enhances the secretion of these inflammatory mediators and contributes to septic shock and meningitis caused by GBS.
authors.affiliation: Department of Pathology, University of Utah School of Medicine, Salt Lake City 84132, USA.
authors.forename: P M
authors.initials: PM
authors.lastname: Steele
authors.forename: N H
authors.initials: NH
authors.lastname: Augustine
authors.forename: H R
authors.initials: HR
authors.lastname: Hill
mesh_terms: D002478:Cells, Cultured; D016207:Cytokines / Q000096:biosynthesis*; D006801:Humans; D007249:Inflammation; D007375:Interleukin-1 / Q000096:biosynthesis; D015850:Interleukin-6 / Q000096:biosynthesis; D019344:Lactic Acid / Q000494:pharmacology*; D007963:Leukocytes, Mononuclear / Q000187:drug effects / Q000276:immunology* / Q000382:microbiology; D013292:Streptococcus agalactiae / Q000276:immunology*; D014409:Tumor Necrosis Factor-alpha / Q000096:biosynthesis
chemical_list: D016207:Cytokines; D007375:Interleukin-1; D015850:Interleukin-6; D014409:Tumor Necrosis Factor-alpha; D019344:Lactic Acid