Cytokinesis arrest and nuclear fission in low density populations of trichomonad protozoan.
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.
Hayashi
Hiromi
H
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
Sakai
Hitomi
H
Minakuchi-Fujiwara
Wakako
W
Takayama
Miki
M
Nakamura-Murata
Michiko
M
Kamo
Ryoko
R
Funakoshi
Kanako
K
Fukumoto
Keisuke
K
Kanemaru
Kaori
K
Nakagawa
Hideyuki
H
Oyama
Yasuo
Y
Shinohara
Nobuyuki
N
Ito
Yoshihiro
Y
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*
D003470:Culture Media; D010100:Oxygen