title: Lack of effect of continuous wave ultrasound exposure on in vivo Chinese hamster cheek pouch epithelial mitotic index.
abstract: Chinese hamster cheek pouches were everted and the epithelia exposed in vivo for 1 min to continuous wave 1.07 MHz ultrasound at intensities ranging from 0.5 to 10.0 W cm-2. Since the mitotic index of the hamster epithelium exhibited a circadian rhythm, the times of sonication and tissue sampling were arranged to allow for detection of a division delay as evidenced by a change in mitotic index in cells insonated in the early S or late S/early G2 phases of the cell cycle. There was no demonstrated effect of the ultrasound exposures on mitotic index.
mesh_terms: D000818:Animals; D002610:Cheek; D002940:Circadian Rhythm; D006224:Cricetinae; D003412:Cricetulus; D004847:Epithelial Cells; D007399:Interphase; D008297:Male; D008938:Mitosis; D008940:Mitotic Index; D013010:Sonication; D014465:Ultrasonics