Mennas Ching

Learn More
Galanin (GAL) is widely distributed in the peripheral and the central nervous systems. In the brain, the highest GAL concentrations are observed within the hypothalamus and, particularly, in nerve terminals of the median eminence. This location, as well as GAL actions on prolactin, growth hormone, luteinizing hormone (LH), and LH-releasing hormone (LHRH)(More)
The inhibitor of hepatic lipoprotein release, 4-aminopyrazolo-(3,4-d)-pyrimidine (4-APP), has been shown to reduce testosterone production via impairment of pituitary gonadotropin secretion rather than through decreased cholesterol availability. It was previously shown that serum LH levels were reduced by more than 75% in male rats treated with 4-APP, but(More)
The present study was designed to investigate the effect of intracerebroventricular infusion of norepinephrine (NE) on the secretion of luteinizing hormone-releasing hormone (LH-RH) into the hypophysial portal blood of steroid-primed ovariectomized rats. Saline infusion into the third ventricle caused no significant change in LH-RH levels. NE infusion (20(More)
Acute ethanol (EtOH) treatment resulted in a significant decline in hypophyseal portal plasma levels of luteinizing hormone-releasing hormone (LH-RH) in orchidectomized rats. This was accompanied by a similar decrement in circulating luteinizing hormone (LH) without, however, modifying plasma follicle-stimulating hormone (FSH) levels at time when peak blood(More)
The present studies were designed to determine whether an ultrashort loop feedback mechanism is involved in the regulation of LHRH secretion. Daily administration of a highly potent LHRH agonist (LHRH-AGO; [D-Ala6,Des-Gly10] LHRH ethylamide) immediately after orchidectomy (ORDX) significantly attenuated the rise of plasma LH from days 2 through 10 after(More)
Ethanol (ETOH) administered acutely to castrate male rats caused a decline in pituitary luteinizing hormone (LH) and prolactin (PRL) secretion. This was associated with an elevation in hypothalamic and median eminence stores of dopamine (DA) that was related to the dose of alcohol given. Pituitary stalk transection (PST) resulted in a significant rise in(More)
There is a need for a satellite communications receiver that can perform simultaneous multi-channel processing of single channel per carrier (SCPC) signals originating from various small (mobile or fixed) earth stations. The number of ground users can be as many as 1000. Conventional techniques of simultaneously processing these signals is by employing as(More)
An effective recovery procedure has been utilized for determining luteinizing hormone-releasing hormone (LHRH) concentrations in rat pituitary stalk plasma. With this new recovery protocol it was revealed that stalk plasma immunoreactive LHRH concentrations increased 5-fold to 206 pg/ml during proestrus(p less than 0.001) and decreased to diestrous levels(More)
  • 1