title: Cytokinesis arrest and nuclear fission in low density populations of trichomonad protozoan.
abstract: Cell growth of anaerobic protozoan Tritrichomonas foetus was analyzed. This protozoan usually proliferates in extremely high density, but protozoan parasites were dispersed uniformly in F-bouillon medium and cell division stopped temporarily. However, nuclear fission continued and giant polynucleated cells formed. Later, cell division resumed and cells returned to normal form. In conditioned medium, cytokinesis of the dispersed parasites did not stop. Results indicated that T. foetus cells secreted an extracellular factor that influenced cytokinesis.
authors.affiliation: Division of Life Science, Department of Mathematical and Natural Sciences, Faculty of Integrated Arts and Sciences, The University of Tokushima, Tokushima, Japan. hayashi@ias.tokushima-u.ac.jp
authors.forename: Hiromi
authors.initials: H
authors.lastname: Hayashi
authors.forename: Hitomi
authors.initials: H
authors.lastname: Sakai
authors.forename: Wakako
authors.initials: W
authors.lastname: Minakuchi-Fujiwara
authors.forename: Miki
authors.initials: M
authors.lastname: Takayama
authors.forename: Michiko
authors.initials: M
authors.lastname: Nakamura-Murata
authors.forename: Ryoko
authors.initials: R
authors.lastname: Kamo
authors.forename: Kanako
authors.initials: K
authors.lastname: Funakoshi
authors.forename: Keisuke
authors.initials: K
authors.lastname: Fukumoto
authors.forename: Kaori
authors.initials: K
authors.lastname: Kanemaru
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Nakagawa
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Oyama
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Shinohara
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Ito
mesh_terms: D000818:Animals; D002455:Cell Division; D002467:Cell Nucleus / Q000378:metabolism*; D003470:Culture Media; D010100:Oxygen / Q000378:metabolism; D011156:Population Density; D013997:Time Factors; D014244:Trichomonas / Q000166:cytology* / Q000378:metabolism*
chemical_list: D003470:Culture Media; D010100:Oxygen