scholarly journals Water-Soluble Chitosan Nanoparticles Inhibit Hypercholesterolemia Induced by Feeding a High-Fat Diet in Male Sprague-Dawley Rats

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Yi Tao ◽  
Hongliang Zhang ◽  
Bing Gao ◽  
Jiao Guo ◽  
Yinming Hu ◽  
...  
Keyword(s):  
High Fat Diet ◽  
Chitosan Nanoparticles ◽  
Plasma Viscosity ◽  
Water Soluble ◽  
Lipid Lowering ◽  
Sprague Dawley ◽  
High Fat ◽  
Sprague Dawley Rats ◽  
Mean Size ◽  
The Mean

Chitosan, a deacetylated product of chitin, has been demonstrated to lower cholesterol in humans and animals. However, chitosan is not fully soluble in water which would influence absorption in the human intestine. In addition, water-soluble chitosan (WSC) has higher reactivity compared to chitosan. The present study was designed to clarify the effects of WSC and water-soluble chitosan nanoparticles (WSC-NPs) on hypercholesterolemia induced by feeding a high-fat diet in male Sprague-Dawley rats. WSC-NPs were prepared by the ionic gelation method and the spray-drying technique. The nanoparticles were spherical in shape and had a smooth surface. The mean size of WSC-NPs was 650 nm variing from 500 to 800 nm. Results showed that WSC-NPs reduced the blood lipids and plasma viscosity significantly and increased the serum superoxide dismutase (SOD) activities significantly. This paper is the first report of the lipid-lowering effects of WSC-NPs suggesting that the WSC-NPs could be used for the treatment of hypercholesterolemia.

Effects of Exposure of Obese Rats to Simulated High Altitudes

1957 ◽  
Vol 191 (2) ◽  
pp. 371-376 ◽  
Author(s):  
Paul D. Altland ◽  
Olaf Mickelsen ◽  
Benjamin Highman
Keyword(s):  
High Fat Diet ◽  
Slow Rate ◽  
Heart Weight ◽  
Simulated Altitude ◽  
Sprague Dawley ◽  
High Fat ◽  
Altitude Exposure ◽  
Sprague Dawley Rats ◽  
Obese Rats ◽  
The Mean

Osborne-Mendel rats became obese when fed a high fat diet for 6–15 months. Obese rats and stock-fed rats were exposed 6 1/2 hours a day, 5 days a week to 18,000 or 25,000 feet simulated altitude for from 4 to 6 months. Both groups of rats developed the same degree of polycythemia and had the same mortality rate. The obese rats lost more weight from altitude exposure and also showed a slightly higher incidence of cardiovalvular thickening and cardiac vegetations, particularly among those that died. The mean heart weight of unexposed obese rats was 50% greater than that of stock-fed rats; the heart weights of both groups increased about 70% following 191 days of exposure. In acute altitude tests at 33,500 feet simulated altitude, both Osborne-Mendel and Sprague-Dawley rats on the high-fat diet, irrespective of the degree of obesity, died within 86 minutes. Sixty per cent of the stock-fed rats survived for a longer period. Some of the heaviest Osborne-Mendel rats on the high-fat diet died within 3 minutes at this altitude. Preoxygenation prevented these early deaths, but neither preoxygenation nor a slow rate of ascent (500 ft/min) had any effect on the high mortality of rats on a high-fat diet exposed to altitude.

The Effects of Maternal High Fat Diet on the Lingual CD36 Lipid Sensors of the Offspring Sprague Dawley Rats

Metabolism ◽  
2021 ◽  
Vol 116 ◽  
pp. 154497
Author(s):  
Elif Günalan ◽  
Meyli Ezgi Karagöz ◽  
Bayram Yılmaz ◽  
Burcu Gemici
Keyword(s):  
High Fat Diet ◽  
Sprague Dawley ◽  
High Fat ◽  
Sprague Dawley Rats ◽  
Lipid Sensors

Abstract 382: Anti-MAA Antibodies in Sprague Dawley Rats are Increased in Response to a High Fat Western Diet

2013 ◽  
Vol 33 (suppl_1) ◽  
Author(s):  
Michael J Duryee ◽  
Anand Dusad ◽  
Scott W Shurmur ◽  
Michael D Johnston ◽  
Robert P Garvin ◽  
...  
Keyword(s):  
High Fat Diet ◽  
Normal Diet ◽  
Western Diet ◽  
Sprague Dawley ◽  
High Fat ◽  
Sprague Dawley Rats ◽  
Stable Plaque ◽  
Circulating Antibodies ◽  
Modified Proteins ◽  
Progression Of Atherosclerosis

Introduction Malondialdehyde/Acetaldehyde (MAA) modified proteins have been suggested to play a role in the development/progression of atherosclerosis. Circulating antibodies directed against these proteins have recently been shown to be associated with the severity of the disease. More specifically, the isotype of the antibody to MAA correlated with either an acute MI (IgG) or stable plaque formation (IgA) formation. MAA is thought to form as a result of the oxidation of fat(s) and thus the concentration and antibody response should reflect the amount of fat in the diet. Objective The purpose of this study was to evaluate the antibody responses to MAA modified proteins following immunization and high fat western diet feeding in rats. Methods Male Sprague Dawley rats were immunized with MAA-modified protein weekly for 5 weeks and then assayed for antibodies to these proteins. Animals were then separated into the following groups: chow sham, chow MAA immunized, high fat sham, and high fat MAA immunized. The high fat animals were fed a Western diet with 2-thiouracil for 12 weeks, bled every 3 weeks, and serum assayed for the presence of circulating MAA antibodies. Results Prior to feeding with high fat diet, rats immunized with MAA-modified protein had a significant increase (P<0.001) in serum antibodies directed against these modified proteins compared to controls (N of 4 per group). Following feeding of high fat diet antibody concentrations increased 6 fold in the high fat MAA immunized group compared to the chow MAA immunized group (P<0.05). Antibodies in the high fat sham and chow sham had only minimal increases in antibodies to these proteins. Conclusions These data demonstrate that following immunization with MAA-modified proteins, circulating antibodies are produced that increase following consumption of a high fat Western diet. It suggests that MAA-modified proteins are produced at low levels following normal diet, producing antibodies which act as a normal clearance method for altered protein. When high fat consumption increases these antibody levels are increased in response to the oxidative stress. Implications Use of these antibodies as a biomarker in the future may help predict the onset or progression of atherosclerosis.

scholarly journals High fat diet alters gut microbiota but not spatial working memory in early middle-aged Sprague Dawley rats

PLoS ONE ◽  
2019 ◽  
Vol 14 (5) ◽  
pp. e0217553 ◽  
Author(s):  
Nikita Girish Deshpande ◽  
Juhi Saxena ◽  
Tristan G. Pesaresi ◽  
Casey Dylan Carrell ◽  
Grayson Breneman Ashby ◽  
...  
Keyword(s):  
Working Memory ◽  
Gut Microbiota ◽  
High Fat Diet ◽  
Spatial Working Memory ◽  
Sprague Dawley ◽  
High Fat ◽  
Middle Aged ◽  
Sprague Dawley Rats
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