Parathyroid and Ultimobranchial Glands

Kenny, Alexander D.

doi:10.1007/978-1-4612-4862-0_21

Cited by 16 publications

(15 citation statements)

References 70 publications

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“…Calcitonin (CT), a calcium-lowering hormone, is a 32-amino acid peptide hormone secreted from the ultimobranchial gland in avian species (Copp and Cheney, 1962;Finney, 1964;Kenny, 1986). In the chicken, the receptor for CT has been found in bone and kidney (Yasuoka et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Calcitonin directly increases adrenocorticotropic hormone-stimulated corticosterone production in the hen adrenal gland

Nakagawa-Mizuyachi¹,

Takahashi

Kawashima³

2009

Poultry Science

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The present study was performed to elucidate whether the receptor for calcitonin (CT) exists in the adrenocortical cells of hens and to determine the effect of CT on adrenocorticotropic hormone (ACTH)-stimulated corticosterone production in its cell. The binding site of CT in the membrane fraction of the adrenal gland in hens was determined using a [125I]CT binding assay system. The binding properties in the adrenal gland satisfied the criteria of a receptor-ligand interaction in terms of specificity, reversibility, and saturation. When the cortical cells were incubated in vitro with chicken ACTH in the presence of CT, greater corticosterone production was observed. The result suggested that CT acts directly on the adrenocortical cells via its receptor binding and increases responsiveness of ACTH on corticosterone production in the laying hen.

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Section: Introductionmentioning

confidence: 99%

Calcitonin directly increases adrenocorticotropic hormone-stimulated corticosterone production in the hen adrenal gland

Nakagawa-Mizuyachi¹,

Takahashi

Kawashima³

2009

Poultry Science

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“…(5,6) Some investigators have postulated that CT may not play any major role in the maintenance of calcium homeostasis in mammals and in other vertebrate species including birds, and its physiologic role lies in functions not concerned in the calcium and bone metabolism. (4) The hypocalcemic effect of CT in birds has been observed in some studies, (7)(8)(9) but not in others. (10,11) Eliam et al (12) interpreted these contradictory data as being mainly attributable to a very fast response of parathyroid glands in birds.…”

Section: Introductionmentioning

confidence: 99%

“…(1) It is secreted from the ultimobrachial gland in birds or from the thyroid gland in mammals. (2)(3)(4) The precise role of CT in the bone metabolism has not been established. (5,6) Some investigators have postulated that CT may not play any major role in the maintenance of calcium homeostasis in mammals and in other vertebrate species including birds, and its physiologic role lies in functions not concerned in the calcium and bone metabolism.…”

Section: Introductionmentioning

confidence: 99%

“…(10,11) Eliam et al (12) interpreted these contradictory data as being mainly attributable to a very fast response of parathyroid glands in birds. (13) Kenny (4) suggested that CT was already circulating at supramaximal concentrations so that the administration of exogenous CT could have no further effect on calcium and bone metabolism. Eliam et al (14) further postulated that high levels of circulating plasma CT and relatively low numbers of CT receptors could explain the conflicting reports on the effect of CT on the avian bone.…”

Section: Introductionmentioning

confidence: 99%

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Calcitonin Receptor Binding Properties in Bone and Kidney of the Chicken During the Oviposition Cycle

Yasuoka

Kawashima

Takahashi

et al. 1998

Journal of Bone and Mineral Research

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“…Calcium metabolism is important in laying hens. It is estimated that during the laying period, daily deposition of calcium is about 10% of the total calcium body storage (Kenny, 1986). Phosphorus is also important, together with calcium, in bone metabolism.…”

Section: Introductionmentioning

confidence: 99%

Variations of clinical biochemical parameters of laying hens and broiler chickens fed aflatoxin‐containing feed

et al. 1994

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SUMMARYTwo groups of 32 laying hens (Hyssex Brown) and two groups of 32 23-day-old (Hybro) broiler chickens were fed 2.5 and 5 parts/10 6 of aflatoxin in their diet for 4, 8, 16 and 32 days; 16 hens and 32 chicks were maintained as control groups (0 parts/10 6 ). After the intoxication period, a clearance period was established of 1, 2, 4 and 8 days. Relative weights of liver and kidneys significantly increased in intoxicated hens, but not in broiler chickens. Histological lesions in both types of bird consisted of hepatic cell vacuolation with fatty infiltration. There was a significant decrease (P< 0.001) in egg production in the 5 parts/10 6 group, which started to recover during the clearance period. No morbidity or mortality due to the aflatoxicosis were observed in either type of bird. In intoxicated laying hens, cholesterol levels were not significantly (P> 0.05) different from control values, but triglyceride levels decreased (P< 0.001) in both intoxicated groups. The effect of aflatoxin on calcium and phosphorus levels was important, because on the 4th day their values decreased significantly. Aspartate aminotransferase (AST) serum levels remained normal, whereas alanino aminotransferase (ALT) activity decreased in both intoxicated groups. The activity of serum lactic dehydrogenase (LDH) and gammaglutamil transferase (GGT) increased significantly. In intoxicated broiler chickens, aflatoxins did not alter (P> 0.05) the biochemical parameters studied, except that the serum calcium concentration was lower in the 5 parts/10 6 group. These data indicated that in intoxicated laving hens, a severe clinical biochemical alteration was produced, and that this together with the hepatic lesions observed in hens and broilers may aid disease diagnosis.

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Parathyroid and Ultimobranchial Glands

Cited by 16 publications

References 70 publications

Calcitonin directly increases adrenocorticotropic hormone-stimulated corticosterone production in the hen adrenal gland

Calcitonin directly increases adrenocorticotropic hormone-stimulated corticosterone production in the hen adrenal gland

Calcitonin Receptor Binding Properties in Bone and Kidney of the Chicken During the Oviposition Cycle

Variations of clinical biochemical parameters of laying hens and broiler chickens fed aflatoxin‐containing feed

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