Document Type : Original Article

Authors

1 Department of Animal Science, Faculty of Agriculture, Islamic Azad University, Ilam Branch, Ilam, Iran.

2 Department of Animal Science, Faculty of Agriculture, Islamic Azad University, Ilam Branch, Ilam, Iran

Abstract

This study investigated the effects of five levels of galanin on plasma concentrations of growth hormone, triiodothyronine, thyroxine, and milk protein in dairy goat breed was sannan. 15 breeds of dairy goats sannan all about the same age and weight were selected for this study and were randomly divided into five treatments (three replicates per treatment). Levels of the hormone injection of galanin in the experiment (0, 0.2, 0.4, 0.8, 0.16) (µg/ml galanin hormone per kilogram of body weight), respectively. Finally, experimental growth hormone was increased hormone galanin (P < 0/05). But a depressing effect on plasma concentrations of thyroid hormones triiodothyronine and thyroxine were not found to be statistically significant (P > 0/05). This hormone also reduced the percentage of protein, which was not statistically significant (P > 0/05)

Keywords

Baranowska, B., Chmielowska, M., Radzikowska, M., Borowiec, M. and Roguski, K.(1999).Effect of neuropeptide Y (NPY), galanin and Vasoactive intestinal peptide (VIP) on pituitary hormon release and on ovarian steroidogenesis. Neuro Endocrinology, 20:385-389.
Chan, Y. Y., Grafstein- Dunn, E., Delemarre- Vandewaal, H. A., Burton, K. A., Clifton, D. K. and Steiner, R. A.(1996).The Role of galanin and its receptor in the feedback regulation of growth hormon secretion. Endocrinology, 137:5303-5310.
Davis, T. M., Burrin, J. M. and Bloom, R.(1987).Growth hormon (GH) release in response to GH- releasing hormon in man 3- fold enhanced by galanin. Journal of Clinical Endocrinology and Metabolism, 65:1248-1252.
Dickson, S. L., Leng, G. and Robison, A.(1994).Electical stimulation of the rat preiventricular nucleus in fluences the activity of hypothalamic arcuate neurons. Journal of Endocrinology, 6:395-367.
Giustina, A., Licini, M., Bussi, A. R., Girlli, A., Pizzocolo, G. and Schettino, M.(1993).Effect of sex and age on the growth hormon response to galanin in healthy human subjects. Journal of Clinical Endocrinology and metbolism, 76:1369-1372.
Gustina, A., Bonfanti, C., Licini, M., Stefana, B., Ragni, G. and Turano, A.(1995).Effect ofgalanin on growth hormon (GH) respose to thyrotropin releasing hormon of rat pituitary gh-secreting adenomatous cells(GH) in culture. Lites Sciences, 58:83-90.
Lanna, D. P., Hosekecht, K. L. and Harris, D. M. (1992). Effects of bovine somatotropin (bst) on lipolysis , lipogenesis , and activities of some enzymatic adipose tissue of lactating cows, Journal of Animal Science. 70: 193-211.
Machlin, L. J. (1973). Effect of growth hormon on milk production and feed utilization in dary cows. Journal of dairy Scince, 56: 575-587.
Murakami, Y., Kato, Y., Shimatsu, A., Koshiyama, H. and Hattori, N.(1989).possibleme chanisms involved in growth hormon secretion induced by galanin in the rat. Journal of Endocrinology, 124:1224-1229.
Maiter, D. M., Hooi, S. C., Koeing, J. I. and Martin, J. B.(1990).Galanin is a physiological regulator of spontaneous pulsatile secretion of growth hormon in the male rat. Journal of Endocrinology , 126:1216-1222.
Marinis, L., mancini, A., Valle, D., Bianchi, A., Gentilella, R., Milardi, D., Mascadri, C. and Giustina, A.(2000).Effect of galanin on growth hormone and prolactin secretion in anorexia nervosa. Metabolism.Feb, 49:155-159.
Ottlecz, A., Snyder, G. D. and McCann, S. M.(1988).Regulatory role of galanin in control of hypothalamic- anterior pituitary function. PROC. NATLACAD. SCI. U.S.A, 85:9861-9865.
Spencer, G. S. G., Berry, C. J. and Bass, J. J.(1994).Neuroendocrine regulation of growth hormone secretion in sheep VI.Intra Cerebro Ventricular administration of galanin. Neuro Report, 5:222-224.
Salri,R., Baratta, M. and Giustina, A.(1999).Effectsof Galanin Infusion on GH secretion and GHRH-induced GH release in prepubertal male lambs. Small Ruminant Research, 33:131-137.
Tatemoto, T., Shimatsu, A., Jornvall, H., Mcdonald, T. J., Mutt, V. and Rokaeus, A.(1983).Galanin a novel biologically active peptide from porcine intestine. FEBS Letters,164:124-128.