Comparetive bone turnover in wistar (w) and obese (ob) growing rats, fed different dietary calcium content

Bone ◽  
2012 ◽  
Vol 50 ◽  
pp. S144-S145
Author(s):  
C. Marotte ◽  
A. Weisstaub ◽  
J. Somoza ◽  
M.L. Portela ◽  
S.N. Zeni⁎
Keyword(s):  
Bone Turnover ◽  
Calcium Content ◽  
Dietary Calcium ◽  
Growing Rats

Body composition and bone markers in obese (β) growing rats: Influence of the dietary calcium content

Bone ◽  
2009 ◽  
Vol 45 (6) ◽  
pp. S154
Author(s):  
A. Weisstaub ◽  
E. Hernández ◽  
M.M.S. Gonzáles Chaves ◽  
G.G. Pellegrini ◽  
C. Marotte ◽  
...  
Keyword(s):  
Body Composition ◽  
Bone Markers ◽  
Calcium Content ◽  
Dietary Calcium ◽  
Growing Rats

Dietary calcium content influences body composition and bone markers of obese (beta O) growing rats

Bone ◽  
2010 ◽  
Vol 47 ◽  
pp. S191
Author(s):  
A. Weisstaub ◽  
E. Hernandez ◽  
G.G. Pellegrini ◽  
C. Marotte ◽  
M.L. de Portela ◽  
...  
Keyword(s):  
Body Composition ◽  
Bone Markers ◽  
Calcium Content ◽  
Dietary Calcium ◽  
Growing Rats

scholarly journals Comparative use of oyster shell and limestone as sources of calcium in the diet of laying chickens

2020 ◽  
Vol 44 (1) ◽  
pp. 275-281
Author(s):  
A. A. Mako ◽  
A. O. Mosuro ◽  
B. S. Adedeji ◽  
F. O. Jemiseye ◽  
T. Abokede
Keyword(s):  
Feed Intake ◽  
Production Efficiency ◽  
Laying Hens ◽  
Oyster Shell ◽  
Calcium Content ◽  
Dietary Calcium ◽  
Feed Utilization ◽  
Ash Content ◽  
Bone Meal ◽  
Shell Weight

Egg producers primarily use oyster shell or limestone as supplemental sources of dietary calcium. This study was conducted to investigate the efficiencies of limestone (CaCo3 ) and oyster shell as calcium sources in the diets of laying hens. Ninety, 58 weeks old Golden Comet Hubbard laying birds were randomly allotted to three treatments of three replicates. Each replicate had 10 birds per replicate. Three different rations were formulated for the study. To include Diet 1 as the control, a diet with bone meal (46%) and oyster shell (54%). Diet 2 had oyster shell and bone meal supplying 82% and 18% of the dietary calcium while Diet 3 had 82% and 18% of the dietary calcium supplied by limestone and bone meal respectively. Feed and water were provided ad-libitum. The parameters measured include: Feed intake (g/d); Hen day production (%); Efficiency of feed utilization (kg); Egg and shell weight (g); Bone weight (g); Ash content of bone (%) and Calcium content of bone (%). The study lasted eight weeks. Results revealed that birds on Diet1 had the highest value for feed intake (0.11 g/d) that differed significantly (P<0.05) from the value (0.10 g/d) obtained for Diet 2 and 3 Hen day production for birds on Diet 2 (57.04) and Diet 3 (56.30) were similar, but differed significantly (P<0.05) from birds on Diet 1 (65.44). Efficiency of feed utilization (EFU kg) was not significantly affected by the dietary treatments as birds on Diet1 had the lowest EFU value (1.80) while birds on Diet 2 had the highest EFU value (2.05). A higher percent of eggs within 50-59g were laid by birds on Diet 3, while eggs of 60g and above were laid by birds on Diet 1 (62 g), significant (p<0.05) variations occurred among treatment means for these egg grade. Egg shell percent was not significant, same trend was observed for bone weight. The effect of dietary treatment on the ash content of bones were similar for birds on Diet 2 and 3, except for bone humerus, however, significant (p<0.05) variation occurred between birds on diets 1 and other two Diets. Calcium contents of the different bones were differed significantly (p<0.05) with birds on diet 3 recording the highest values for all bone investigated. It can be concluded from this study that Limestone can replace oyster shell as a source of calcium in the diet of laying hens without deleterious effect.

Role of parathyroid hormone in regulation of main calcium fluxes in rats.

1977 ◽  
Vol 232 (6) ◽  
pp. E535
Author(s):  
B Haldimann ◽  
J P Bonjour ◽  
H Fleisch
Keyword(s):  
Parathyroid Hormone ◽  
Bone Resorption ◽  
Bone Formation ◽  
Bone Turnover ◽  
Linear Correlation ◽  
Constant Amount ◽  
Calcium Fluxes ◽  
Growing Rats

The effect of calcium deprivation on the various calcium fluxes was studied in growing rats either sham-operated (SHAM), thyroparathyroidectomized (TPTX), or thyroparathyroidectomized and supplemented with parathyroid hormone (PTH) (TPTX + PTH). In SHAM rats a decrease in the net absorption of calcium (Vna) has no influence on calcemia or on bone formation (Vo+), but leads to an increase in bone resorption (Vo-). In TPTX rats a decrease in Vna induces a decrease in calcemia and in Vo+ but still causes an increase in Vo-. The same is true in TPTX + PTH rats although all the variables measured are increased. In TPTX rats, both without and with PTH, a linear correlation exists between calcemia and Vo+ suggesting that calcemia influences bone formation. Furthermore, it appears that PTH is important in regulating bone turnover, but that the adaptation of Vo- to a change in Vna can occur in the absence or in the presence of a constant amount of this hormone. The mechanism of regulating this adaptation of bone resorption is still unknown.

No effect of dietary calcium on body weight of lean and obese mice and rats

2004 ◽  
Vol 286 (4) ◽  
pp. R669-R677 ◽  
Author(s):  
Qinmin Zhang ◽  
Michael G. Tordoff
Keyword(s):  
Body Weight ◽  
Body Weight Gain ◽  
Calcium Content ◽  
High Energy ◽  
Dietary Calcium ◽  
Simple Relation ◽  
Normal Weight ◽  
The Body ◽  
High Energy Density ◽  
Sprague Dawley

Recent epidemiological and animal studies have led to the hypothesis that low dietary calcium intakes contribute to obesity. Here, we evaluated whether calcium influenced the body weight of normal-weight and obese rodents. All experiments involved female C57BL/6J mice or Sprague-Dawley rats fed normal- or high-energy-density diets (3.8 or 4.7 kcal/g). Calcium intake was manipulated by allowing mice to drink sweetened 30 mM CaCl2 solution or feeding mice and rats diets differing in calcium content (0.2%, 0.6%, or 1.8% Ca2+). Blood samples were taken from rats to confirm that the diets had their intended effects on metabolism. There were no effects of the calcium manipulations on energy intake, body weight, or carcass fat content and no simple relation between calciotropic hormones and body weight. One experiment found a significant decrease in body weight gain of lean and obese rats fed the 1.8% Ca2+ diet, but we suspect that this was due to forced consumption of the unpalatable diet, reducing growth. These studies provide little support for the hypothesis that dietary calcium contributes to the etiology or maintenance of obesity.

Effects of dietary calcium content and vitamin D source on skeletal properties in growing turkeys

2011 ◽  
Vol 52 (6) ◽  
pp. 718-729 ◽  
Author(s):  
M.R. Tatara ◽  
W. Krupski ◽  
M. Jankowski ◽  
Z. Zduńczyk ◽  
J. Jankowski ◽  
...  
Keyword(s):  
Vitamin D ◽  
Calcium Content ◽  
Dietary Calcium

scholarly journals Effects of supplemental phytase on the mineral content in tibia of broilers fed different cereal based diets

2011 ◽  
Vol 50 (No. 2) ◽  
pp. 68-73 ◽  
Author(s):  
J. Pintar ◽  
M. Bujan ◽  
B. Homen ◽  
K. Gazić ◽  
M. Sikirić ◽  
...  
Keyword(s):  
Soybean Meal ◽  
Mineral Content ◽  
Calcium Content ◽  
Dietary Calcium ◽  
Mineral Levels

A 21-day experiment with day-old broilers was conducted in order to assess the effect of phytase supplementation to cereal-soybean meal based diets on the mineral content in tibia (Ca, P, Fe, Mg, Cd, Zn). Diets were formulated to contain 4 different cereals (maize, wheat, triticale and barley), 2 levels of dietary calcium (0.6 and 1.0%) and 3 levels of supplemental phytase (0, 500 and 1 000 PU/kg). Supplemental phytase increased the mineral levels in tibia. A statistically significant increase was observed for Fe (P &lt; 0.024) and Mg (P &lt; 0.024), but not for Ca, P, Cd and Zn contents in tibia. In the case of Fe and Mg contents significant cereal &times; phytase interactions were also observed (P &lt; 0.036 and 0.002, respectively). Cereals influenced the contents of Fe (P &lt; 0.0001), Mg (P &lt; 0.0001), Cd (P &lt; 0.0001) and Zn (P &lt; 0.003) while dietary calcium levels affected only calcium content (P &lt; 0.008). &nbsp;

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