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Biomedical subjects

K Oshima

Publications and source records attributed to K Oshima.

At least 253 records · Page 14Linked to original sources
PubMed1979

Uterine contractility and plasma levels of steroid hormones after intravaginal treatment of pregnant Japanese monkeys (Macaca fuscata fuscata) with 16,16-dimethyl-trans-delta2-prostaglandin E-1 methyl ester.

Intravaginal treatment with a PGE-1 analogue (ONO-802) resulted in strong uterine contractions with a high frequency which lasted for more than 3 h. When 20-50 microgram ONO-802/kg were administered intravaginally 5 times every 3 h in 5 pregnant animals, vaginal bleeding started by 6 h and abortion occurred by 26 h after the initial treatment. There were no significant side effects. Plasma levels of steroid hormones, especially progesterone and 20alpha-dihydroprogesterone, fluctuated initially and then finally dropped to undetectable levels within 24 h.

Abortion, Induced↗
PubMed1978

Decreased smooth muscle side effects with 16, 16-dimethyl-trans-delta2-PGE1 methyl ester in Japanese monkey (Macaca Fuscata Fuscata).

The smooth muscle stimulating activity of a new PGE1 analog, 16, 16-dimethyl- trans delta2 -PGE1 methyl ester (ONO-802) was evaluated by simultaneously recording the EMG of the uterus and intestines, along with urinary bladder pressure, and blood pressure in pregnant and non-pregnant Japanese monkeys (Macaca fuscata fuscata). Single intravenous injections of ONO-802 in increasing dosages (0.2-5 microgram/kg) were found to be 50-100 times or more effective in inducing uterine contraction than PGF2alpha and PGE1. A mild, transient gastrointestinal muscle stimulating activity was observed, but change in urinary bladder pressure and blood pressure was not evident. ONO-802 induced uterine contractions in the pregnant animals were 10 times greater than in the non-pregnant animals. These results suggest that ONO-802 may be a suitable clinical prostaglandin for use in therapeutic abortion.

Abortion, Induced↗
PubMed1978

An explanation for the high incidence of congenital rubella syndrome in Ryukyu.

An exceptionally high incidence of congenital rubella syndrome (CRS) has been noted in Ryukan children who were infants in utero during an extensive rubella epidemic in the Ryukyu Islands in 1964 through the spring of 1965. In 1965, the Congenital Rubella Study Group of Kyushu University registered in the Ryukyus 408 cases of CRS and an incidence of 20 cases of CRS per 1000 births. The nearby Amami Islands, on the other hand, had a low incidence of CRS. Seroepidemiologic studies indicated a high prevalence of antibodies in the Ryukyus but a low prevalence in the Amamis. Since CRS is uncommon throughout Japan, some investigators have hypothesized that Japanese strains of the virus are avirulent and that a virulent American strain caused the epidemic in the Ryukyus. However, retrospective seroepidemiologic studies reported here indicate that the high incidence of CRS in the Ryukyus was more probably due to low seropositivity and a resultant high attack rate of rubella among pregnant women, rather than to a hypothetical virulent teratogenic strain of rubella virus. Conversely, the data suggest that the low incidence of CRS in Japan may reflect the infrequency of rubella nonimmunes in women of childbearing age.

Antibodies, Viral↗