Development, validation, and utilization of a novel antibody specific to the type III chicken gonadotropin-releasing hormone receptor

H. O. McFarlane, N. T. Joseph, S. R. Maddineni, R. Ramachandran, G. Y. Bédécarrats

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Two gonadotropin-releasing hormone receptors (GnRH-Rs) have been characterized in chickens to date: cGnRH-R-I and cGnRH-R-III, with cGnRH-R-III being the predominant pituitary form. The purpose of the present study was to first validate a novel antibody for the specific detection of cGnRH-R-III and second, using this antibody, detect changes in cGnRH-R-III protein levels in the pituitary gland of male and female chickens during a reproductive cycle. The localization of cGnRH-R-III within the anterior pituitary gland was also determined. Western blotting of pituitary extracts and transiently transfected COS-7 cell lysates revealed that our antibody is highly specific to cGnRH-R-III protein. Similarly, when used in immunocytochemistry, this antibody specifically detects cells expressing cGnRH-R-III and not cGnRH-R-I. Western blot analyses of chicken pituitary gland homogenates show that cGnRH-R-III protein levels are significantly greater in sexually mature birds than in immature birds or birds at the end of a reproductive cycle (P < 0.0001). A similar pattern was observed for both males and females. Additionally, the antibody was able to detect cGnRH-R-III in cells along the periphery of the cephalic and caudal lobes of the anterior pituitary where the cells containing the gonadotropins are located. In summary, we successfully validated a novel antibody to cGnRH-R-III and showed levels of cGnRH-R-III protein in the pituitary fluctuate with respect to the reproductive status in both male and female chickens.

Original languageEnglish (US)
Pages (from-to)110-118
Number of pages9
JournalDomestic Animal Endocrinology
Issue number2
StatePublished - Feb 2011

All Science Journal Classification (ASJC) codes

  • Food Animals
  • Animal Science and Zoology
  • Endocrinology


Dive into the research topics of 'Development, validation, and utilization of a novel antibody specific to the type III chicken gonadotropin-releasing hormone receptor'. Together they form a unique fingerprint.

Cite this