Effects of Isoflavones in Feed on Plasma Estradiol Concentration and Productive Performances in Laying Hens
الموضوعات :
ن. جرگوسکا
1
(Institute of Animal Science, University “Ss. Cyril and Methodius”, bul Ilinden br. 92a, 1000 Skopje, Macedonia)
ک. فیلو
2
(Department of Animal Science, Faculty of Agricultural Science and Food, University “Ss. Cyril and Methodius”, bul. Aleksandar Makedonski bb, 1000 Skopje, Macedonia)
و. لوکو
3
(Institute of Animal Science, University “Ss. Cyril and Methodius”, bul Ilinden br. 92a, 1000 Skopje, Macedonia)
و. کوستو
4
(Institute of Animal Science, University “Ss. Cyril and Methodius”, bul Ilinden br. 92a, 1000 Skopje, Macedonia)
ر. جورجیوسکی
5
(Institute of Animal Science, University “Ss. Cyril and Methodius”, bul Ilinden br. 92a, 1000 Skopje, Macedonia)
س. جورجیوسکی
6
(Department of Animal Science, Faculty of Agricultural Science and Food, University “Ss. Cyril and Methodius”, bul. Aleksandar Makedonski bb, 1000 Skopje, Macedonia)
س. گریگروا
7
(Institute of Animal Science, Kostinbrod, Bulgaria)
الکلمات المفتاحية: laying hens, estradiol, isoflavones,
ملخص المقالة :
Isoflavones are phytoestrogens which have estrogen-like activity in animals and humans with structure similar to 17-β-estradiol and capable of binding to estrogen receptors (ERs).This experiment was conducted to demonstrate the effect of isoflavones on estradiol concentration in blood and its influence on the productive performances in ISA Brown laying hens fed with supplemented feed with large amount of isoflavones. Isoflavones as non steroid phytoestrogens were added in large amounts to the feed of laying hens in 0, 1000, 2000 and 3000 mg kg-1 of feed. Estradiol concentration in blood of the isoflavone-treated chickens was significantly higher in comparison with the control group (P<0.01). The supplemented isoflavones in the feed have significant improvement on the egg weight during the 1st month (P<0.05) and 2nd month (P<0.01) and also for the whole experimental period (P<0.05). Further studies are required to investigate the effect of isoflavones on other reproductive hormones (follicle stimulating hormone (FSH) and progesterone) which are related with the egg production.
Akintola O.A., Ajuogu P.K. and Ajayi F.O. (2011). Effect of oestrogen on egg production and egg quality traits in second year layers. Adv. Agric. Biol. 1, 73-76.
Barrett J. (1996). Phytoestrogens: friends or foes? Environ. Health Perspect. 104, 478-482.
Cai J., Gu H., Shi S. and Tong H. (2013). Effects of high-dose daidzein on laying performance, egg quality and antioxidation on laying hens. J. Poult. Sci. 50, 237-241.
Cassidy A. (2003). Potential risks and benefits of phytoestrogens-rich diets. Int. J. Vitam. Nutr. Res. 73, 120-126.
Dibb S. (1995). Swimming in a sea of oestrogens, chemical hormones disrupters. Ecologis. 25, 27-31.
James R.F., James V.A., Woodhams D.J. and Fitzpatrick M.C. (1994). The Toxicity of Soybeans and Related Products. Published by James and James, Auckland, New Zealand.
Kurzer M.S. and Xu X. (1997). Dietary phytoestrogens. Annu. Rev. Nutr. 17, 353-381.
Murkies A.L., Wilcox G. and Davis S.R. (1998). Phytoestrogens. J. Clin. Endocrinol. Metab. 83, 297-303.
Pilsakova L., Riečanský I. and Jagla F. (2010). The physiological actions of isoflavone phytoestrogens. Physiol. Res. 59, 651-664.
Saitoh S., Sato T., Harada H. and Takita T. (2001). Transfer of soy isoflavone into the egg yolk of chickens. Biosci. Biotechnol. Biochem. 65, 2220-2225.
Wilhelms K.W., Scanes C.G. and Anderson L.L. (2006). Lack of estrogenic or antiestrogenic actions of soy isoflavones in an avian model: the Japanese quail. Poult. Sci. 85, 1885-1889.
Yellayi S., Naaz A., Szewczykowski M.A., Sato T., Woods J.A., Chang J., Segre M., Allred C.D., Helferichm W.G. and Cooke P.S. (2002). The phytoestrogen genistein induces thymic and immune changes: a human health concern? Proc. Natl. Acad. Sci. 99, 7616-7621.
Zhao R.Q., Zhou Y.C., Ni Y.D., Lu L.Z., Tao Z.R., Chen W.H. and Chen J. (2005). Effect of daidzein on egg-laying performance in Shaoxing duck breeders during different stages of the egg production cycle. Br. Poult. Sci. 46, 175-181.
