Ontogeny of endocrine control of osmoregulation in chick embryo

Doneen, Byron A.; Smith, Thomas E.

doi:10.1016/0016-6480(82)90141-1

Cited by 20 publications

(1 citation statement)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Osmoregulatory effect of prolactin have also been found in the chick embryo (Doneen and Smith 1982 ;Murphy et al 1986), and in the transport of water across the human amnion (Leontic and Tyson 1977 ;Leontic et al 1979). The increased speed of embryonic development with prolactin reported here may be related to the same osmoregulatory effect.…”

Section: Discussionsupporting

confidence: 73%

Improvement of mouse embryo development in vitro by prolactin.

Yohkaichiya

Fukaya

Hoshiai

et al. 1988

Tohoku J. Exp. Med.

View full text Add to dashboard Cite

Section: Discussionsupporting

confidence: 73%

Improvement of mouse embryo development in vitro by prolactin.

Yohkaichiya

Fukaya

Hoshiai

et al. 1988

Tohoku J. Exp. Med.

View full text Add to dashboard Cite

Embryonic osmoregulation: Consequences of high and low water loss during incubation of the chicken egg

1988

View full text Add to dashboard Cite

The rates of water loss of domestic chicken eggs were varied during incubation to measure the osmoregulatory ability of the avian embryo. Egg water loss was increased by drilling holes in the eggshell over the airspace on day 13 (I = 21 days) and then placing these eggs in a low relative humidity (r.h.: 0-10%) incubator until hatch. Egg water loss was decreased by placing other eggs in a high-r.h. (85-90%) incubator on day 0. Eggs with low water loss (approximately 6% of initial fresh mass [IFM]) produced embryos and yolks that were not different in wet or dry mass when compared to control eggs that lost approximately 12% of IFM. However, 1-4 gm of excess albumen were left in low-water-loss eggs on day 21. Hatching success was 71% and 89% for low and control eggs, respectively. Low egg water loss did not appear to disturb embryonic growth. The allantoic fluid volume and millimolar allantoic Na+ and Cl- ions declined faster with high and slower with low rates of water loss. Thus, excess water was lost as a result of increased movement of water out of allantoic fluid, which was due to increased active transport of Na+ ions by the chorioallantoic membrane (CAM). Eggs with high water loss had elevated Cl- levels after day 17 in plasma and amniotic fluid, which indicated a period of osmotic stress after depletion of allantoic fluid between day 18 and hatch. The decrease in wet embryo mass measured in embryos from high-water-loss eggs was due principally to dehydration of skin. Embryonic skin may serve as an emergency water reservoir during osmotic stress. Dehydrated chicks produced from high-water-loss eggs were 6 gm less in wet mass at hatch compared to controls. However, these chicks regained the water deficit 7 days after hatch and grew at a rate not different from control chicks through 6 weeks of age. Total egg water loss of 12% of IFM results in highest hatching success. However, water losses between 6% and 20% of IFM do not appear to affect adversely the growth or water content of the chick. Water losses above 20% of IFM cause early depletion of allantoic fluid, prolong the period of osmotic stress, and result in subsequent dehydration of blood, amniotic fluid, and embryonic skin.(ABSTRACT TRUNCATED AT 400 WORDS)

show abstract

Renal, metabolic and hematological effects of trans-retinoic acid during critical developmental windows in the embryonic chicken

Alvine

Burggren

2013

J Comp Physiol B

View full text Add to dashboard Cite

All-trans-retinoic acid (tRA), an active metabolite of vitamin A, directly influences the developing kidney, and is a major regulatory signal during vertebrate organogenesis. The aim of the current study was to specifically target potential critical windows in renal development, and assess altered renal function through disruptions in embryonic fluid compartments. In addition, the effect of exogenous tRA administration on embryonic growth and metabolism was determined. Embryos were exposed to 0.1 or 0.3 mg tRA on embryonic day 8. Morphological and physiological measurements were made on days 12, 14, 16 and 18. Embryo wet mass on day 18 was reduced by 23 % (0.1 mg tRA) and 44 % (0.3 mg tRA). tRA exposure elevated mass-specific oxygen consumption in embryos exposed to 0.1 mg (21.2 ± 0.3 μL(-1) g(-1) min(-1)) and 0.3 mg (23.4 ± 0.4 μL(-1) g(-1) min(-1)) when compared to sham (18.9 ± 0.6 μL(-1) g(-1) min(-1)) on day 14, but not subsequent incubation days. Osmolality of blood plasma was transiently lowered in embryos exposed to 0.3 mg tRA between days 14 and 16. Allantoic fluid osmolality was significantly elevated by tRA to ~220 mmol L(-1) from days 16 to 18 compared to controls. Blood plasma [Na(+)] was reduced by ~17 % over the same period, while allantoic fluid [Na(+)] was elevated in tRA-treated embryos compared to control embryos. Collectively, our data indicates that exogenous administration of tRA produces significant alterations to the developmental trajectory of the developing embryonic chicken.

show abstract

Ontogeny of endocrine control of osmoregulation in chick embryo

Cited by 20 publications

References 16 publications

Improvement of mouse embryo development in vitro by prolactin.

Improvement of mouse embryo development in vitro by prolactin.

Embryonic osmoregulation: Consequences of high and low water loss during incubation of the chicken egg

Renal, metabolic and hematological effects of trans-retinoic acid during critical developmental windows in the embryonic chicken

Contact Info

Product

Resources

About