TY - JOUR
T1 - Pulsatile secretion pattern of growth hormone in turkeys
T2 - Effects of age and sex
AU - Shaw, S. N.
AU - Bacon, W. L.
AU - Vasilatos-Younken, R.
AU - Nestor, K. E.
N1 - Funding Information:
The technical assistance of R. A. Wachtel, D. W. Long, and P. G. Zarkower is greatly appreciated. Thanks are also extended to L. G. Newman for assistance in the preparation of this manuscript. This project was supported by funds from The Ohio State University Seed Grant 221745.
PY - 1987/11
Y1 - 1987/11
N2 - Male and female turkeys were cannulated through the jugular vein, and blood samples were withdrawn remotely at 10-min intervals for a period of 8 hr at two points in the posthatch growth phase (4 and 14 weeks of age). Growth hormone (GH) concentration was determined for each sample by radioimmunoassay using a recombinant chicken growth hormone preparation as standard. Data were evaluated for age- and sex-related differences. Four-week-old male and female turkeys displayed a pulsatile pattern of GH secretion. Growth hormone secretory profile characteristics differed significantly between ages with regard to overall mean, number of peaks, amplitude of peaks, interval between peaks, baseline, and total GH detected. Male four-week-old turkeys had a peak amplitude significantly greater than that of females of the same age. Older (14-week-old) male turkeys demonstrated a significantly greater nunber of GH secretory peaks than females during the 8-hr sampling period; however, overall it did not appear that the older birds had an organized pattern of GH secretion above baseline levels.
AB - Male and female turkeys were cannulated through the jugular vein, and blood samples were withdrawn remotely at 10-min intervals for a period of 8 hr at two points in the posthatch growth phase (4 and 14 weeks of age). Growth hormone (GH) concentration was determined for each sample by radioimmunoassay using a recombinant chicken growth hormone preparation as standard. Data were evaluated for age- and sex-related differences. Four-week-old male and female turkeys displayed a pulsatile pattern of GH secretion. Growth hormone secretory profile characteristics differed significantly between ages with regard to overall mean, number of peaks, amplitude of peaks, interval between peaks, baseline, and total GH detected. Male four-week-old turkeys had a peak amplitude significantly greater than that of females of the same age. Older (14-week-old) male turkeys demonstrated a significantly greater nunber of GH secretory peaks than females during the 8-hr sampling period; however, overall it did not appear that the older birds had an organized pattern of GH secretion above baseline levels.
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U2 - 10.1016/0016-6480(87)90045-1
DO - 10.1016/0016-6480(87)90045-1
M3 - Article
C2 - 3428563
AN - SCOPUS:0023617903
SN - 0016-6480
VL - 68
SP - 331
EP - 338
JO - General and Comparative Endocrinology
JF - General and Comparative Endocrinology
IS - 2
ER -