title: Rat granulocyte colony-forming unit (CFU-G) assay for the assessment of drug-induced hematotoxicity.
abstract: To assess the drug-induced hematotoxicity to granulocyte progenitors, we established a modified colony-forming assay using rat bone marrow cells (BMCs). In the presence of various colony-stimulating factors (CSFs), rat BMCs were disseminated on methylcellulose at a concentration of 1.3 x 10(4) cells/cm(2) (5 x 10(4) cells/0.5 ml/well in a 12-well plate). Mouse granulocyte-macrophage colony-stimulating factor (mGM-CSF) stimulated the formation of almost all macrophage colonies. Human granulocyte colony-stimulating factor (hG-CSF) alone or in combination with mouse interleukin-3 (mIL-3) did not significantly effect on the number of rat colony-forming units in culture (CFU-C). When BMCs were seeded at 5.2 x 10(4) cells/cm(2) (5 x 10(5) cells/1 ml/dish in a 35-mm dish), hG-CSF increased the number of the colonies in a dose-dependent manner, and resulted in about 50 colonies at 50 ng/ml. The constituent cells of the colonies were identified as neutrophils. Under these conditions, the effects of 5-fluorouracil (5-FU) on granulocyte colony-forming units (CFU-G) were examined in rats and mice. The inhibitory effect of 5-FU on rat CFU-G was similar to the effect on mouse CFU-G. These results indicate that the rat CFU-G induced by hG-CSF is capable of being used for the evaluation of drug-induced hematotoxicity.
authors.affiliation: Tokushima Research Institute, Otsuka Pharmaceutical Co. Ltd, Tokushima, Japan. kuniko_m_t@research.otsuka.co.jp
authors.forename: K
authors.initials: K
authors.lastname: Matsumura-Takeda
authors.forename: K
authors.initials: K
authors.lastname: Kotosai
authors.forename: A
authors.initials: A
authors.lastname: Ozaki
authors.forename: H
authors.initials: H
authors.lastname: Hara
authors.forename: S
authors.initials: S
authors.lastname: Yamashita
mesh_terms: D000818:Animals; D001854:Bone Marrow Cells / Q000187:drug effects* / Q000473:pathology; D002478:Cells, Cultured; D003114:Colony-Forming Units Assay / Q000379:methods*; D004305:Dose-Response Relationship, Drug; D004338:Drug Combinations; D005472:Fluorouracil / Q000633:toxicity; D016179:Granulocyte Colony-Stimulating Factor / Q000494:pharmacology; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000494:pharmacology; D006460:Hemolysin Proteins / Q000633:toxicity*; D006801:Humans; D007377:Interleukin-3 / Q000494:pharmacology; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D013234:Stem Cells / Q000187:drug effects* / Q000473:pathology; D018675:Toxicity Tests / Q000379:methods*
chemical_list: D004338:Drug Combinations; D006460:Hemolysin Proteins; D007377:Interleukin-3; D016179:Granulocyte Colony-Stimulating Factor; D016178:Granulocyte-Macrophage Colony-Stimulating Factor; D005472:Fluorouracil