APA/NIGMS Conference Poster Winner Abstract--"The Effects of Chronic Pre and Postnatal Exposure to Nicotine on Drug Discrimination and Locomotor Activity in Male and Female Sprague-Dawley Rats

2003 ◽  
Author(s):  
Nicha Oliver ◽  
Rita Barrett
Author(s):  
D. J. McComb ◽  
J. Beri ◽  
F. Zak ◽  
K. Kovacs

Gonadotroph cell adenomas of the pituitary are infrequent in human patients and are not invariably associated with altered gonadal function. To date, no animal model of this tumor type exists. Herein, we describe spontaneous gonadotroph cell adenomas in old male and female Sprague-Dawley rats by histology, immunocytology and electron microscopy.The material consisted of the pituitaries of 27 male and 38 female Sprague Dawley rats, all 26 months of age or older, removed at routine autopsy. Sections of formal in-fixed, paraffin-embedded tissue were stained with hematoxylin-phloxine-saffron (HPS), the PAS method and the Gordon-Sweet technique for the demonstration of reticulin fibers. For immunostaining, sections were exposed to anti-rat β-LH, anti-ratβ-TSH, anti-rat PRL, anti-rat GH and anti-rat ACTH 1-39. For electron microscopy, tissue was fixed in 2.5% glutaraldehyde, postfixed in 1% OsO4 and embedded in epoxy-resin. Tissue fixed in 10% formalin, embedded in epoxy resin without osmification, was used for immunoelectron microscopy.


2008 ◽  
Vol 180 ◽  
pp. S39-S40
Author(s):  
Robert Roos ◽  
Patrik Andersson ◽  
Päivi Heikkinen ◽  
Hans-Joachim Schmitz ◽  
Leo van der Ven ◽  
...  

2012 ◽  
Vol 303 (8) ◽  
pp. R850-R860 ◽  
Author(s):  
Miriam Goebel-Stengel ◽  
Andreas Stengel ◽  
Lixin Wang ◽  
Gordon Ohning ◽  
Yvette Taché ◽  
...  

Various molecular forms of CCK reduce food intake in rats. Although CCK-8 is the most studied form, we reported that CCK-58 is the only detectable endocrine peptide form in rats. We investigated the dark-phase rat chow intake pattern following injection of CCK-8 and CCK-58. Ad libitum-fed male Sprague-Dawley rats were intraperitoneally injected with CCK-8, CCK-58 (0.6, 1.8, and 5.2 nmol/kg), or vehicle. Food intake pattern was assessed during the dark phase using an automated weighing system that allowed continuous undisturbed monitoring of physiological eating behavior. Both CCK-8 and CCK-58 dose dependently reduced 1-h, dark-phase food intake, with an equimolar dose of 1.8 nmol being similarly effective (−49% and −44%). CCK-58 increased the latency to the first meal, whereas CCK-8 did not. The intermeal interval was reduced after CCK-8 (1.8 nmol/kg, −41%) but not after CCK-58. At this dose, CCK-8 increased the satiety ratio by 80% and CCK-58 by 160%, respectively, compared with vehicle. When behavior was assessed manually, CCK-8 reduced locomotor activity (−31%), whereas grooming behavior was increased (+59%). CCK-58 affected neither grooming nor locomotor activity. In conclusion, reduction of food intake by CCK-8 and CCK-58 is achieved by differential modulation of food intake microstructure and behavior. These data highlight the importance of studying the molecular forms of peptides that exist in vivo in tissue and circulation of the animal being studied.


Author(s):  
David V. Gauvin ◽  
Jill A. Dalton ◽  
Marci L. Harter ◽  
David Holdsworth ◽  
Jonelle May ◽  
...  

2013 ◽  
Vol 68 (1) ◽  
pp. e9
Author(s):  
Jonathan Toot ◽  
Michelle Hackman ◽  
Timothy Pringle ◽  
Melissa Beck ◽  
Philip Atterson ◽  
...  

Xenobiotica ◽  
2012 ◽  
Vol 43 (2) ◽  
pp. 169-181 ◽  
Author(s):  
James M. Mathews ◽  
Sherri S. Brown ◽  
Purvi R. Patel ◽  
Sherry R. Black ◽  
Troy T. Banks ◽  
...  

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