FAT METABOLISM IN GROWING SWINE: A REVIEW

1987 ◽  
Vol 67 (2) ◽  
pp. 301-318 ◽  
Author(s):  
E. R. FARNWORTH ◽  
J. K. G. KRAMER
Keyword(s):  
Enzyme Activity ◽  
Body Fat ◽  
Growing Pigs ◽  
Lipolytic Enzyme ◽  
Lipogenic Enzyme ◽  
Factors Affecting ◽  
Growing Period ◽  
Fat Stores ◽  
Temporary Decrease ◽  
Total Body

At birth, piglets have little body fat that can be mobilized. The influx of high-fat milk causes a rapid increase in body fat stores and a depression of lipogenic enzyme activity. Conversely, lipolytic enzyme activity increases after birth. Changing the fat intake of sucking piglets affects the amount of fat deposition. The length of the sucking period also influences body composition at weaning. Weaning produces a pronounced but temporary decrease in total body lipid, despite an increase in fat synthesis. The effect of weaning on lipolysis is not clear due to a lack of experimental data. During the growing period, fat continues to build up even though lipogenic enzyme activity tends to decline with age. The composition of the diet, the sex of the animal and genetic factors have all been shown to influence the rate of lipogenesis. Fewer reports have been published in which factors affecting lipolysis have been studied and the results are often less conclusive. However, the combined activities of lipogenic and lipolytic processes do not account for the large quantity of body fat found in growing pigs. Key words: Swine, fat, lipogenesis, lipolysis, diet, sex.

Feeding patterns of S. crassicaudata (Marsupialia:Dasyuridae): role of gender, photoperiod, and fat stores

1997 ◽  
Vol 272 (1) ◽  
pp. R78-R83 ◽  
Author(s):  
P. J. Hope ◽  
G. A. Wittert ◽  
M. Horowitz ◽  
J. E. Morley
Keyword(s):  
Body Weight ◽  
Food Intake ◽  
Food Deprivation ◽  
Body Fat ◽  
Dark Cycle ◽  
Feeding Patterns ◽  
Sminthopsis Crassicaudata ◽  
Total Body Fat ◽  
Fat Stores ◽  
Total Body

Little is known about feeding regulation in marsupials. Sminthopsis crassicaudata is a small nocturnal marsupial, whose tail contains approximately 25% total body fat. We have characterized the effect of gender, photoperiod, food deprivation, and tail removal (lipectomy) on food intake in S. crassicaudata. Males and females maintained in captivity on long-day (LD, 16:8-h light-dark cycle) and short-day (SD, 9:15-h light-dark cycle) light regimens were studied. Feeding patterns under LD and SD photoperiods were initially measured under conditions of ad libitum food supply and then in groups of animals exposed to 24- and 36-h periods of food deprivation. Feeding occurred predominantly in the dark. Females maintained on SD photoperiods for 5 wk ate less (P < 0.005) than females on LD or males on either SD or LD, but this reduction in food intake was not associated with a decrease either in body weight or tail width. After both 24- and 36-h fasts, total food intake in the subsequent 24 h increased (P < 0.001) up to 100% in all groups, with no gender or photoperiod effect. SD females, however, ate less (P < 0.05) than LD females in the first 6 h after refeeding. Tail width decreased (P < 0.05) in all groups of animals after the 36-h fast but only in LD animals after the 24-h fast (P < 0.05). Body weight decreased similarly in all groups of animals after fasting. The effect of tail removal was studied in LD males. The procedure, which was well tolerated, resulted in an initial decrease in body weight (P < 0.005), which recovered within 3 wk. On day 45 in the animals whose tails were removed, body fat was approximately 30% greater than body fat of controls (P < 0.02). No significant increase in food intake occurred after tail removal. These data demonstrate in Sminthopsis crassicaudata 1) a photoperiod and gender-dependent effect on food intake, 2) the ability to regulate the amount and distribution of total body fat, and 3) a dissociation between the regulation of food intake and changes in body fat stores, which suggest alterations in energy expenditure.

Compensation for an increase in body fat caused by donor transplants into mice

2004 ◽  
Vol 286 (6) ◽  
pp. R1149-R1155 ◽  
Author(s):  
Cherie Rooks ◽  
TaNeisha Bennet ◽  
Timothy J. Bartness ◽  
Ruth B. S. Harris
Keyword(s):  
Body Fat ◽  
Statistical Significance ◽  
Subcutaneous Fat ◽  
Cell Number ◽  
Adipocyte Size ◽  
Fat Depots ◽  
Siberian Hamsters ◽  
Epididymal Fat ◽  
Fat Stores ◽  
Total Body

Rodents tend to compensate for experimental obesity in which both adipocyte size and number are increased. In contrast, it was recently reported that Siberian hamsters do not compensate for dorsal subcutaneous transplants of fat, which increase body fat without changing the size of adipocytes. In the first experiment described here we tested whether mice changed the size of their endogenous fat stores 2 or 5 wk after donor fat was added as subcutaneous transplants. Each epididymal fat pad from donor mice was cut in half and placed ventrally in recipient mice, increasing body fat by ∼10%. After 2 wk, there was no effect of the transplants on the size of endogenous fat depots or the size of adipocytes in epididymal fat depots. There was a substantial decrease in mass and adipocyte size in transplanted fat. Five weeks after surgery the endogenous epididymal and retroperitoneal fat depots of recipient mice were significantly decreased, serum leptin was reduced, and the size of adipocytes in endogenous epididymal fat was significantly reduced, although cell number had not changed. The size of transplanted cells was the same as at 2 wk. In a second experiment, epididymal fat was placed as either dorsal or ventral subcutaneous fat transplants. Five weeks after surgery the endogenous fat depots were decreased in all recipient mice but none of the differences reached statistical significance. These results suggest that mice have mechanisms to maintain total body fat mass that respond to an increase in the number of fat cells present.

A Seasonal Study of Body Condition and Water Turnover in a Free-Living Population of Platypuses, Ornithorhynchus Anatinus (Monotremata).

1983 ◽  
Vol 31 (2) ◽  
pp. 109 ◽  
Author(s):  
AJ Hulbert ◽  
TR Grant
Keyword(s):  
Body Fat ◽  
Body Condition ◽  
Tritiated Water ◽  
Water Turnover ◽  
Free Living ◽  
Percentage Body Fat ◽  
Ornithorhynchus Anatinus ◽  
Fat Stores ◽  
Total Body ◽  
Juvenile Males

Body condition was assessed in a population of free-living platypuses (Ornithorhynchus anatinus) in the Upper Shoalhaven River in summer (February) and winter (September). Total body fat was estimated by measurement of tritiated water space and tail volume was also measured. Carcass analysis of dead platypuses verified a negative correlation between percentage body fat and percentage body water. The major store of body fat is located in the tail. In the live polulation, adult platypuses showed little seasonal change in body fat. Juveniles are relatively fat in February (soon after their emergence from their burrows) but at the end of their first winter they have lost a considerable amount of body fat. Juvenile males seem to possess negligible body fat stores in September. Changes in relative tail volume showed similar changes to those of estimated body fat. Some platypuses were recaught, and for these water turnover was calculated to be very high, at about 480 ml daily.

The value of bioelectrical impedance analysis vs. condition indices in predicting body fat stores in North American porcupines (Erethizon dorsatum)

2006 ◽  
Vol 84 (12) ◽  
pp. 1712-1720 ◽  
Author(s):  
Erika L. Barthelmess ◽  
Monica L. Phillips ◽  
Michael E. Schuckers
Keyword(s):  
Body Fat ◽  
Bioelectrical Impedance Analysis ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Dry Mass ◽  
Erethizon Dorsatum ◽  
Total Body Fat ◽  
Fat Stores ◽  
Total Body ◽  
Condition Indices

We developed a predictive model to estimate body fat stores in a population of North American porcupines, Erethizon dorsatum (L., 1758). We trapped porcupines in the autumn of 2004 and spring of 2005. After collecting morphometric measurements on each animal, we used a plethysmograph to perform bioelectrical impedance analysis (BIA). We euthanized the subjects, measured two components of body composition (body fat, body water) via direct chemical analysis, and calculated lean dry mass to compare with BIA data. With regression we found the best predictive models for total body water, total body fat, percent body fat, and lean dry mass. We also estimated body condition for each animal using six different condition indices and compared the ability of the condition indices and our regression model to predict total body fat. Our model for total body fat accounted for 84% of the variation in fat measured by direct chemical analysis, and our model for percent body fat accounted for 78% of the variation. Two condition indices were significantly related to total body fat in porcupines and explained 45%–49% of the variation in observed body fat. We recommend BIA as a useful technique for estimating body fat stores in field studies of free-ranging porcupines and suggest abandonment of the use of condition indices as analogues of body fat stores in animal studies unless the indices can first be validated.

Total body fat content and fat topography are associated differently with in vivo glucose metabolism in nonobese and obese nondiabetic women

Diabetes ◽  
1992 ◽  
Vol 41 (9) ◽  
pp. 1151-1159 ◽  
Author(s):  
E. Bonora ◽  
S. Del Prato ◽  
R. C. Bonadonna ◽  
G. Gulli ◽  
A. Solini ◽  
...  
Keyword(s):  
Glucose Metabolism ◽  
Body Fat ◽  
Fat Content ◽  
Body Fat Content ◽  
Total Body Fat ◽  
Total Body

Leptin: a significant indicator of total body fat but not of visceral fat and insulin insensitivity in African-American women

Diabetes ◽  
1996 ◽  
Vol 45 (11) ◽  
pp. 1635-1637 ◽  
Author(s):  
A. Dua ◽  
M. I. Hennes ◽  
R. G. Hoffmann ◽  
D. L. Maas ◽  
G. R. Krakower ◽  
...  
Keyword(s):  
African American ◽  
African American Women ◽  
Body Fat ◽  
Visceral Fat ◽  
American Women ◽  
Total Body Fat ◽  
Total Body ◽  
Insulin Insensitivity

Effect of total body water estimates via bioimpedance on bod pod-based three-compartment body fat models

2021 ◽  
Author(s):  
Brett S. Nickerson ◽  
Samantha V. Narvaez ◽  
Mitzy I. Juarez ◽  
Stefan A. Czerwinski
Keyword(s):  
Body Fat ◽  
Total Body Water ◽  
Body Water ◽  
Bod Pod ◽  
Total Body

scholarly journals Associations between exposure to perfluoroalkyl substances and body fat evaluated by DXA and MRI in 109 adolescent boys

2021 ◽  
Vol 20 (1) ◽  
Author(s):  
Mathilde Lolk Thomsen ◽  
Louise Scheutz Henriksen ◽  
Jeanette Tinggaard ◽  
Flemming Nielsen ◽  
Tina Kold Jensen ◽  
...  
Keyword(s):  
Body Fat ◽  
Study Design ◽  
Sulfonic Acid ◽  
Standard Deviation Score ◽  
Cross Sectional Study ◽  
Mass Spectrometry Data ◽  
Perfluoroalkyl Substances ◽  
Sectional Study ◽  
Cross Sectional ◽  
Total Body

Abstract Background Exposure to perfluoroalkyl substances (PFASs) has been associated with changes in body mass index and adiposity, but evidence is inconsistent as study design, population age, follow-up periods and exposure levels vary between studies. We investigated associations between PFAS exposure and body fat in a cross-sectional study of healthy boys. Methods In 109 boys (10–14 years old), magnetic resonance imaging and dual-energy X-ray absorptiometry were performed to evaluate abdominal, visceral fat, total body, android, gynoid, android/gynoid ratio, and total fat percentage standard deviation score. Serum was analysed for perfluorooctanoic acid, perfluorooctane sulfonic acid (PFOS), perfluorohexane sulfonic acid, perfluorononanoic acid, and perfluorodecanoic acid using liquid chromatography and triple quadrupole mass spectrometry. Data were analysed by multivariate linear regression. Results Serum concentrations of PFASs were low. Generally, no clear associations between PFAS exposure and body fat measures were found; however, PFOS was negatively associated with abdominal fat (β = -0.18, P = 0.046), android fat (β = -0.34, P = 0.022), android/gynoid ratio (β = -0.21, P = 0.004), as well as total body fat (β = -0.21, P = 0.079) when adjusting for Tanner stage. Conclusions Overall, we found no consistent associations between PFAS exposure and body fat. This could be due to our cross-sectional study design. Furthermore, we assessed PFAS exposure in adolescence and not in utero, which is considered a more vulnerable time window of exposure.

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