![]() |
|
|
AG King, KS Landreth and D Wierda
Department of Pharmacology and Toxicology, West Virginia University Medical Center, Morgantown.
Previous investigations from our laboratory have shown that the benzene metabolite, hydroquinone (HQ), inhibits B cell production by preventing the maturation of pre-B cells. Data presented in this paper demonstrate that HQ interrupts B-lymphopoiesis indirectly by inhibiting the production of interleukin-4 (IL-4) by fibroblastic stromal cells. HQ exposure of fibroblastic stromal cells (SCL-173 and SCL-160) did not affect IL-4 production by these cell lines at any dose tested. Addition of untreated bone marrow-derived macrophages to HQ-treated bone marrow stromal cells (heterogeneous population of fibroblastic cells and macrophages) reversed inhibition of IL-4 production. However, addition of HQ-treated macrophages was without effect. Our studies suggest that HQ inhibits macrophage production of IL-1, a potent inducer of IL-4 production by bone marrow fibroblastic stromal cells. Interruption of IL-1 release from macrophages mediates the observed inhibition of B lineage cell maturation.
This article has been cited by other articles:
![]() |
Q. Lan, L. Zhang, M. Shen, M. T. Smith, G. Li, R. Vermeulen, S. M. Rappaport, M. S. Forrest, R. B. Hayes, M. Linet, et al. Polymorphisms in Cytokine and Cellular Adhesion Molecule Genes and Susceptibility to Hematotoxicity among Workers Exposed to Benzene Cancer Res., October 15, 2005; 65(20): 9574 - 9581. [Abstract] [Full Text] [PDF] |
||||