estrone/zea mays

Eight 2 year old Hereford cows from days 8 to 12 of the estrous cycle were injected intramuscularly with 5 ml of corn oil containing 5 mg of estradiol-17beta (two cows), estrone (two cows), progesterone (two cows) or testosterone (two cows). Each cow treated with estradiol received 494 microc of

The purpose of this study is to test the long-standing hypothesis that endogenous agents found in human breast fluid and in plasma are potential initiators of breast cancer. Therefore, we evaluated the tumorigenicity in the mammary glands of female CD rats of cholestan-5 alpha,6 alpha-epoxy-3

In various animal and human studies, early administration of 17β-estradiol, a strong antioxidant, anti-inflammatory, and anti-apoptotic agent, significantly decreases the severity of injury in the brain associated with cell death. Estrone, the predominant estrogen in postmenopausal women, has been

We tested the hypotheses that in winter anovulatory mares (1) both chronic daily injections of estradiol-17β (E2) and subcutaneous E2 implants could enhance pituitary secretion of gonadotropins in response to continuous subcutaneous infusion of native gonadotropin-releasing hormone (GnRH); and (2)

In Exp. 1, changes in uterine fluid content of protein, calcium and prostaglandin F2 alpha (PGF) were examined between d 30 to 144 of gestation. Volume of uterine fluid (mean +/- SE) in the nongravid uterine horn of unilaterally pregnant ewes increased (P less than .05) between d 30 (8 +/- 1 ml) and

The effect of dietary fat on mammary tumor incidence, estrogen-binding capacity as related to the hormone dependency of the tumors, and circulating estrogen levels in Sprague-Dawley rats given an oral dose of 7,12-dimethylbenz[a]anthracene (DMBA) was investigated. Rats were fed diets consisting of

Mammary carcinoma was induced in female Nb rats by implanting pellets of estrone at 25-28 days of age, and prostatic cancer was induced in male rats of the same strain by repeatedly implanting pellets of testosterone propionate. Feeding semipurified diets containing either 3% or 20% corn oil did not

Two studies were conducted with ovariectomized animals to compare luteinizing hormone (LH) responses during the 24-hr period following an IM injection of either estriol or estradiol-17 beta. In Exp. 1, six long-term ovariectomized (6 months) beef cows were randomly assigned to be given 1 mg of

The objectives of this study were to evaluate the effects of repeated injection of 4-chlorodiphenyl ether (4-CDE) on the survival and growth of endometriotic implants. Endometriosis was surgically induced in adult female B6C3F1 mice (n = 25) after ovariectomy. Seven days later the animals were

The current study was designed to gain insights into regulatory mechanisms mediating long-term effects of androgen excess or deficiency on corpus luteum function in pigs. Piglets were injected subcutaneously with testosterone propionate (TP, an androgen), flutamide (FLU, an anti-androgen) or corn

This study was conducted to characterize the effect of androstenedione on estrous cyclicity, mating behavior and fetal development. Thirty-day old rats received corn oil alone or androstenedione (in corn oil) at one of four concentrations (0, 1.0, 5.0, 10.0 or 30.0 mg/kg body weight) by gavage for