ENZYMOLOGICAL STUDIES ON THE CONTRACTION OF THE PREGNANT UTERINE MUSCULATURE

ON THE ACTIVITY OF ACTOMYOSIN-ATPase DURING PREGNANCY AND PARTURITION

抄録

Recently it is reported that in the muscular contraction the contractile protein complex actomyosin (AM) and adenosine tri-phosphate (ATP) as a source of high energy play important role 1,2,3,5). However, most of these investigations are restricted to the skelet muscle and there are only a few reports on the involuntary muscle 7,8,9,10). As for the onset of labour or premature interruption of pregnancy there have been offered not a few hypotheses, which cannot, however, explain the complicated mechanism or cause either. In the present paper the difficult problem of the uterine muscular contraction was tried to approach from the activity of actomyosin ATPase in the different phases of gestation of the rat.