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This book contains information obtained from authentic and highly regarded sources. Reasonable efforts have been made to publish reliable data and information, but the author and publisher cannot assume responsibility for the validity of all materials or the consequences of their use. The authors and publishers have attempted to trace the copyright holders(More)
Nicotine (3 mg/kg SC) administered twice daily throughout pregnancy to guinea pigs resulted in offspring that were behaviorally deficient both as neonates and adults. The nicotine-treated offspring showed reduced spontaneous alternation both as neonates and adults. Also, the nicotine-treated offspring were less likely to enter a novel alley as neonates and(More)
We examined effects of ischemia and asphyxia on levels of prostaglandin H synthase-1 (PGHS-1) and prostaglandin H synthase-2 (PGHS-2) in piglet brain. Ischemia was induced by increasing intracranial pressure and asphyxia was induced by turning off the respirator. Duration of anoxic stress was 10 min. In some animals, indomethacin (5 mg/kg, i.v.) or(More)
The effects of abdominal vagotomy at proestrus on ovarian weight and antral follicles greater than 150 microns diameter and on serum levels of gonadotropins and testosterone were assessed 24 and 48 h and 4 and 8 days after surgery. Serum levels of estradiol were assessed at 4 and 8 days. Vagotomy increased ovarian weight at 48 h, decreased ovarian weight at(More)
Immunohistochemical techniques were used to examine the distribution of prostaglandin H synthase (PGHS)-2 and neuronal nitric oxide synthase (nNOS) in piglet brain. Samples from parietal cortex, hippocampus, and cerebellum were immersion fixed in 10% formalin, sectioned at 50 microm, and immunostained using specific antibodies against PGHS-2 and nNOS.(More)
In anesthetized piglets, endothelial and neuronal nitric oxide synthase (eNOS and nNOS, respectively) levels were investigated after global cerebral ischemia. Increased intracranial pressure was used to produce 5 or 10 minutes of global ischemia, which was verified visually by observing pial arteriolar blood flow and by a microsphere technique. At 4 to 6(More)
Abdominal vagotomy of estrus or proestrus rats resulted in disruptions of the estrous cycle which was characterized by prolonged periods of diestrus (10-12 days in length). In contrast, vagotomy on metestrus or diestrus did not disrupt the estrous cycle. The induction of pseudopregnancy, in response to cervical stimulation on the morning of estrus, was also(More)
Our previous studies have indicated that oxygen radicals, produced during reoxygenation following short-term arterial hypoxia, lead to sustained suppression of cerebral arteriolar responses to N-methyl-D-aspartate (NMDA). However, whether arteriolar dilator responses to NMDA are reduced during arterial hypoxia has never been examined. In this study, we(More)