Distribution and Contribution of Calcium From the Albumen, Yolk and Shell to the Developing Chick Embryo

Johnston, P. M.; Comar, C. L.

doi:10.1152/ajplegacy.1955.183.3.365

Cited by 162 publications

(58 citation statements)

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“…On comparison, it is evident that both the chorioallantoic-membrane Ca2+-transport activity measured in vitro (Terepka et al, 1969(Terepka et al, , 1971 and the accumulation of Ca2+ by the embryo (Johnston & Comar, 1955;Romanoff, 1967) exhibit age-activity profiles similar to that of the chorioallantoic-membrane carbonic anhydrase activity (Fig. 1).…”

Section: Resultsmentioning

confidence: 86%

“…As pointed out in the introduction, the capacity of the chorioallantoic membrane to mobilize Ca2+ from the egg shell is also a developmentally regulated function (Johnston & Comar, 1955;Romanoff, 1967;Terepka et al, 1969Terepka et al, , 1976. On comparison, it is evident that both the chorioallantoic-membrane Ca2+-transport activity measured in vitro (Terepka et al, 1969(Terepka et al, , 1971 and the accumulation of Ca2+ by the embryo (Johnston & Comar, 1955;Romanoff, 1967) exhibit age-activity profiles similar to that of the chorioallantoic-membrane carbonic anhydrase activity (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…During embryonic skeletal calcification, the chorioallantoic membrane is responsible for mobilizing over 100mg of calcium from the egg shell into the embryonic circulation (Johnston & Comar, 1955;Romanoff, 1967). The Ca2+-transport function of the chorioallantoic membrane is highly developmentally regulated, beginning after the days 12-13 of incubation of the chick embryo, and continuing to increase steadily until hatching (Terepka et al, 1969;Crooks & Simkiss, 1975).…”

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Functional involvement of carbonic anhydrase in calcium transport of the chick chorioallantoic membrane

Tuan¹,

Zrike²

1978

Biochemical Journal

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Carbonic anhydrase activity was demonstrated in the chick-embryonic chorioallantoic membrane and was correlated with the Ca2+-transport activity of the membrane. It is inhibited by sulphonamides and is expressed in the chorioallantoic membrane in an age-dependent fashion during embryonic development. Ca2+ uptake by the chorioallantoic membrane in vivo also increases in a similar age-dependent manner. The temporal increase in these activities is coincident with calcium deposition in the embryonic skeleton. Incubation of the chorioallantoic membrane in ovo with sulphonamides specifically inhibits both the carbonic anhydrase and the Ca2+ uptake activities of the membrane in vivo. Enzyme histochemistry revealed that the carbonic anhydrase activity is localized in the Ca2+-transporting ectodermal cells of the chorioallantoic membrane. These results, taken together, indicate that carbonic anhydrase may be functionally important in the Ca2+-transport activity of the chorioallantoic membrane.

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Section: Resultsmentioning

confidence: 86%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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Functional involvement of carbonic anhydrase in calcium transport of the chick chorioallantoic membrane

Tuan¹,

Zrike²

1978

Biochemical Journal

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“…The higher ash content observed for T2 chicks from younger breeders may reflect better bone development (Johnston and Comar, 1955).…”

Section: Discussionmentioning

confidence: 95%

Manipulation of Incubation Temperatures to Increase Cold Resistance of Broilers:Influence on Embryo Development, Organ Weights, Hormones and Body Composition

et al. 2012

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Eighteen hundred eggs obtained from Ross broiler breeders at 32 and 48 wk age were randomly assigned to two incubation treatments: T1 eggs were incubated at 37.6℃ throughout, while for T2 eggs the incubation temperature was reduced 1℃ for 6 h daily at embryonic ages (EA) 10 to 18. Embryo and organ weights and body composition were measured at EA 14, 19 and day of hatch (DOH). Hatchability and hatching duration, as well as serum triiodothyronine (T 3 ), thyroxin (T 4 ), and triglycerides were measured at DOH. T1 eggs contained less water than T2 eggs at EA 18. Hatchability was lower and the incubation period was 4.2 h longer for T2 than T1 chicks. On DOH for older breeders chick weights and serum T 3 levels were higher for T2 than T1; however, those from younger breeders were similar at both incubation temperatures. These results may show a beneficial effect of T2 treatment in older breeders. Incubation temperature did not affect triglycerides levels. On DOH, higher body lipids content of T2 than T1 chicks may contribute to their resistance to cold post hatch.

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“…The key factor in chicken development is proper nutrition during embryogenesis (Foye et al, 2006). The main source of calcium for the growing embryo is its eggshell (Johnston and Comar, 1955). Thanks to the chorioallantoic membrane releasing acids, which dissolve the eggshell, the availability of the elements is markedly elevated (Leeson and Leeson, 1963).…”

Section: Introductionmentioning

confidence: 99%

Can silver nanoparticles affect the mineral content, structure and mechanical properties of chicken embryo bones?

Sikorska¹,

Szmidt²,

Sawosz³

et al. 2010

J. Anim. Feed Sci.

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Biomedical application of silver nanoparticles has recently gained much attention. In this study, we investigated whether hydrocolloids of silver nanoparticles (nano-Ag) are deposited in chicken bones during embryogenesis and to what extent they can affect biochemical characteristics, mineral content, structure, and mechanical properties of bones. Hydrocolloids (0.3 ml), containing 50 ppm of nano-Ag, were injected in ovo prior to incubation of eggs. After 20 days of incubation, blood and thigh bones were isolated and analysed. Nano-Ag was deposited in embryo thigh bones, but did not affect the structure or mechanical properties of the bone. There was no effect of nano-Ag on the selected biochemical indices, but there was a tendency towards increasing mineral content, indicating that nanoparticles may influence bone mineralization. Considering that nano-Ag is absorbed by the embryo skeleton without affecting bone properties, these particles might be a good candidate for carriers of micronutrients or drugs into bones.

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Distribution and Contribution of Calcium From the Albumen, Yolk and Shell to the Developing Chick Embryo

Cited by 162 publications

References 0 publications

Functional involvement of carbonic anhydrase in calcium transport of the chick chorioallantoic membrane

Functional involvement of carbonic anhydrase in calcium transport of the chick chorioallantoic membrane

Manipulation of Incubation Temperatures to Increase Cold Resistance of Broilers:Influence on Embryo Development, Organ Weights, Hormones and Body Composition

Can silver nanoparticles affect the mineral content, structure and mechanical properties of chicken embryo bones?

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