Skip to main content
padlock icon - secure page this page is secure

Proportions of melanocyte stimulating hormone-immunoreactive cells in the adenohypophysis of Silky fowl and hyperpigmentation-free cockerels

Buy Article:

$52.00 + tax (Refund Policy)

ABSTRACT

Alpha-melanocyte stimulating hormone (α-MSH) is one of the main regulators for melanocytes, and the adenohypophysis is one of the major tissues for the synthesis of this hormone. The Silky fowl is a characteristic breed of chicken with hyperpigmentation throughout the body. The involvement of the adenohypophysis in the hyperpigmentation of this breed is not known. In the present study, the proportion of melanocyte stimulating hormone-immunopositive cells (MSH cells) in the adenohypophysis was immunocytochemically compared between Silky, Red Cornish × New Hampshire (RN) crossbred and Japanese bantam cockerels at 15 weeks of age. After the body and gland were weighed, the adenohypophyseal cells were enzymatically dispersed and immunostained for α-MSH, and the immunopositive MSH cells were counted. The weights of the body and adenohypophysis were heaviest in the RN crossbred, followed by the Silky and lightest in the bantam cockerels. In contrast, the ratio between adenohypophysis and bodyweight was much larger in the Silky and the bantam than in the RN crossbreed (P < 0.05). The population of MSH cells in the adenohypophysis was larger in the Silky (14.3%) than in the RN crossbreed (8.0%) and the bantam (8.1%) cockerels (P < 0.05). From these results, it was concluded that prepubertal Silky cockerel have numerous MSH cells in the adenohypophysis suggesting a relationship to hyperpigmentation.
No References
No Citations
No Supplementary Data
No Article Media
No Metrics

Keywords: Silky fowl; adenohypophysis; hyperpigmentation; immunocytochemistry; melanocyte stimulating hormone-immunopositive cells

Document Type: Research Article

Affiliations: 1: School of Agriculture, Kyushu University, Higashi-ku, Fukuoka-shi, 2: Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Higashi-ku, Fukuoka-shi, 3: Field Science Center, Faculty of Agriculture, Saga University, Saga-shi and 4: Faculty of Agriculture, Graduate School, and 5: Saga Prefectural Livestock Experiment Station, Yamauchi-cho, Saga-ken, Japan

Publication date: December 1, 2005

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more