title: Autonomous growth of committed hematopoietic progenitors from peripheral blood of workers exposed to low levels of benzene.
abstract: We investigated whether exposure to low levels of benzene (geometric mean of exposures = 0.28-0.41 parts per million) results in perturbations of the hemopoietic system found in patients with myeloproliferative diseases. Erythroid (BFU-E) and granulocyte-monocyte (CFU-GM) colonies from peripheral blood were grown in methylcellulose with and without the addition of cytokines (erythropoietin and granulocyte-stimulating factor). Colony growth from 17 workers exposed to low levels of benzene was compared with 20 healthy control subjects. Exposed workers had significantly increased growth of autonomous BFU-E and unstimulated CFU-GM when compared with the control subjects. Unexposed smokers had increased colony growth without the addition of cytokines. Colony growth was not significantly different between the groups after the addition of cytokines. Workers exposed to low concentrations of benzene and unexposed smokers have increased cytokine-independent hematopoiesis.
authors.affiliation: Institute of Hematology, Lady Davis Carmel Medical Center, Bruce Rappaport Medical School, Technion Haifa, Israel.
authors.forename: Miriam
authors.initials: M
authors.lastname: Quitt
authors.forename: Aliza
authors.initials: A
authors.lastname: Cassel
authors.forename: Anatol
authors.initials: A
authors.lastname: Yoffe
authors.forename: Anna Maria
authors.initials: AM
authors.lastname: Anatol
authors.forename: Paul
authors.initials: P
authors.lastname: Froom
mesh_terms: D000328:Adult; D001554:Benzene / Q000009:adverse effects*; D015672:Erythroid Precursor Cells / Q000187:drug effects* / Q000502:physiology; D006410:Hematopoiesis / Q000187:drug effects; D006801:Humans; D008297:Male; D009196:Myeloproliferative Disorders / Q000139:chemically induced; D016273:Occupational Exposure / Q000009:adverse effects*; D010578:Petroleum
chemical_list: D010578:Petroleum; D001554:Benzene