The present study was carried out to determine, first, the cardiac beta-adrenergic receptor characteristics of broiler chick embryos exposed to two different CO2 levels during the last stage of embryonic development, and second, the prophylactic effect of beta(1)-adrenoceptor blocker on right ventricular hypertrophy in broiler chickens. High CO2 embryos showed significantly higher haematocrit values, higher partial pressure of CO2 levels and lower partial pressure of O-2 levels than those of normal CO2 embryos. Exposure of chick embryos to high CO2 levels reduced the binding capacity of myocardial beta-adrenergic receptors compared with those embryos incubated at the normal CO2 level. Atenolol-supplemented diet numerically reduced ascites incidence in broiler chickens (7%) compared with birds fed the control diet (15%). In conclusion, these data support the important role of the beta-adrenergic receptor in the cardiovascular system for cardiac output, and secondary to pulmonary hypertension syndrome.
机构:Loma Linda Univ, Sch Med, Dept Physiol, Ctr Perinatal Biol, Loma Linda, CA 92350 USA
Browne, VA
Stiffel, VM
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机构:Loma Linda Univ, Sch Med, Dept Physiol, Ctr Perinatal Biol, Loma Linda, CA 92350 USA
Stiffel, VM
Pearce, WJ
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机构:Loma Linda Univ, Sch Med, Dept Physiol, Ctr Perinatal Biol, Loma Linda, CA 92350 USA
Pearce, WJ
Longo, LD
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机构:Loma Linda Univ, Sch Med, Dept Physiol, Ctr Perinatal Biol, Loma Linda, CA 92350 USA
Longo, LD
Gilbert, RD
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Loma Linda Univ, Sch Med, Dept Physiol, Ctr Perinatal Biol, Loma Linda, CA 92350 USALoma Linda Univ, Sch Med, Dept Physiol, Ctr Perinatal Biol, Loma Linda, CA 92350 USA
机构:Loma Linda Univ, Sch Med, Dept Physiol, Ctr Perinatal Biol, Loma Linda, CA 92350 USA
Browne, VA
Stiffel, VM
论文数: 0引用数: 0
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机构:Loma Linda Univ, Sch Med, Dept Physiol, Ctr Perinatal Biol, Loma Linda, CA 92350 USA
Stiffel, VM
Pearce, WJ
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机构:Loma Linda Univ, Sch Med, Dept Physiol, Ctr Perinatal Biol, Loma Linda, CA 92350 USA
Pearce, WJ
Longo, LD
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机构:Loma Linda Univ, Sch Med, Dept Physiol, Ctr Perinatal Biol, Loma Linda, CA 92350 USA
Longo, LD
Gilbert, RD
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机构:
Loma Linda Univ, Sch Med, Dept Physiol, Ctr Perinatal Biol, Loma Linda, CA 92350 USALoma Linda Univ, Sch Med, Dept Physiol, Ctr Perinatal Biol, Loma Linda, CA 92350 USA