Mohamed E. El Halawani - Publications

Refereed Articles

Bakken, T., S.W. Kang, S. Kosonsiriluk, T. Kuwayama, Y. Chaiseha, and M.E. El Halawani. 2013. Differential roles of hypothalamic serotonin receptor subtypes in the regulation of prolactin secretion in the turkey hen. Acta Histochem. S0065-1281(13)00114-1.

Chaiyachet, O.A., D. Chokchaloemwong, N. Prakobsaeng, N. Sartsoongnoen, S. Kosonsiriluk, I. Rozenboim, M.E. El Halawani, T.E. Porter, and Y. Chaiseha. 2013. Neuroendocrine regulation of rearing behavior in the native Thai hen. Acta Histochem. 115:209-218.

Chokchaloemwong, D., N. Prakobsaeng, N. Sartsoongnoen, S. Kosonsiriluk, M.E. El Halawani, and Y. Chaiseha. 2013. Mesotocin and maternal care of chicks in native Thai hens (Gallus domesticus). Horm. Behav. 64:53-69.

Rozenboim, I., M.E. El Halawani, Y. Kashash, Y. Piestun, and O. Halevy. 2013. The effect of monochromatic photostimulation on growth and development of broiler birds. Gen. Comp. Endocrinol.190:214-219.

Kosonsiriluk, S., L.J. Mauro, V. Chaiworakul, Y. Chaiseha, and M.E. El Halawani. 2013. Photoreceptive oscillators within neurons of the premammillary nucleus (PMM) and seasonal reproduction in temperate zone birds. Gen. Comp. Endocrinol. 190:149-55.

Chaiseha, Y., P. Ngernsoungnern, N. Sartsoongnoen, N. Prakobsaeng, and M.E. El Halawani. 2012. Presence of prolactin mRNA in extra-pituitary brain areas in the domestic turkey. Acta Histochem. 2012 Feb;114(2):116-21. doi: 10.1016/j.acthis.2011.03.007. Epub 2011 Apr 13.

Prakobsaeng, N., N. Sartsoongnoen, S. Kosonsiriluk, O.A. Chaiyachet, D. Chokchaloemwong, I. Rozenboim, M. El Halawani, T.E. Porter, and Y. Chaiseha. 2011. Changes in vasoactive intestinal peptide and tyrosine hydroxylase immunoreactivity in the brain of nest-deprived native Thai hen. Gen. Comp. Endocrinol.171:189-196.

Thayananuphat, A., O.M. Youngren, S.W. Kang, T. Bakken, S. Kosonsiriluk, Y. Chaiseha, and M.E. El Halawani. 2011. Dopamine and mesotocin neurotransmission during the transition from incubation to brooding in the turkey. Horm. Behav. 60:327-335.

Chaiseha,Y., S.W. Kang, B. Leclerc, S. Kosonsiriluk, N. Sartsoongnoen, and M.E. El Halawani. 2010. Serotonin receptor subtypes influence prolactin secretion in the turkey. Gen. Comp. Endocrinol. 165:170-175.

Kang, S.W., B. Leclerc, S. Kosonsiriluk, L.J. Mauro, A. Iwasawa, and M.E. El Halawani. 2010. Melanopsin expression in dopamine-melatonin neurons of the premammillary nucleus of the hypothalamus and seasonal reproduction in birds. Neuroscience 170:200-213.

Leclerc, B., S.W. Kang, L.J. Mauro, S. Kosonsiriluk, Y. Chaiseha, and M.E. El Halawani. 2010. Photoperiodic modulation of clock gene expression in the avian premammillary nucleus. J. Neuroendocrinol. 22:119-128.

El Halawani, M.E., S.W. Kang, B. Leclerc, S. Kosonsiriluk, and Y. Chaiseha. 2009. Dopamine-melatonin neurons in the avian hypothalamus and their role as photoperiodic clocks. Gen. Comp. Endocrinol. 163:123-127.

Kang, S.W., B. Leclerc, L.J. Mauro, and M.E. El Halawani. 2009. Serotonergic and catecholaminergic interactions with co-localized dopamine-melatonin neurons in the hypothalamus of the female turkey. J. Neuroendocrinol. 21:10-19.

Kosonsiriluk, S., N. Sartsoongnoen, O.A. Chaiyachet, N. Prakobsaeng, T. Songserm, I. Rozenboim, M. El Halawani, and Y. Chaiseha. 2008. Vasoactive intestinal peptide and its role in continuous and seasonal reproduction in birds. Gen. Comp. Endocrinol. 159:88-97.

Sartsoongnoen, N., S. Kosonsiriluk, N. Prakobsaeng, T. Songserm, I. Rozenboim, M.E. El Halawani, and Y. Chaiseha. 2008. The dopaminergic system in the brain of the native Thai chicken, Gallus domesticus: localization and differential expression across the reproductive cycle. Gen. Comp. Endocrinol. 159:107-115

Kang, S.W., A. Thayananuphat, T. Bakken, and M.E. El Halawani. 2007. Dopamine-melatonin neurons in the avian hypothalamus controlling seasonal reproduction. Neuroscience 150 (1):223-33.

Thayananuphat, A., S.W. Kang, T. Bakken, J.R. Millam, and M.E. El Halawani. 2007. Rhythm dependent light induction of the c-fos gene in the turkey hypothalamus. J. Neuroendocrinol. 19 (6):407-417.

Thayananuphat, A., S.W. Kang, T. Bakken, J.R. Millam, and M.E. El Halawani. 2007. Rhythmic dependent light induction of gonadotrophin-releasing hormone-I expression and activation of dopaminergic neurones within the premammillary nucleus of the turkey hypothalamus. J. Neuroendocrinol. 19(6):399-406.

Al-Zailaie, K.A., S.W. Kang, O.M. Youngren, A. Thayananuphat, T. Bakken, Y. Chaiseha, J.R. Millam, J.A. Proudman, and M.E. El Halawani. 2006. Identification of dopamine, gonadotrophin-releasing hormone-I, and vasoactive intestinal peptide neurones activated by electrical stimulation to the medial preoptic area of the turkey hypothalamus: A potential reproductive neuroendocrine circuit. J. Neuroendocrinol. 2006;18(7):514-525.

Jónsson, J.E., A.D. Afton, R.T. Alisauskas, C.K. Bluhm, and M.E. El Halawani. 2006. Ecological and physiological factors affecting brood patch area and prolactin levels in arctic-nesting geese. The Auk 123(2):405–418.

Kang, S.W., A. Thayananuphat, I. Rozenboim, J.R. Millam, J.A. Proudman, and M.E. El Halawani. 2006. Expression of hypothalamic GnRH-I mRNA in the female turkey at different reproductive states and following photostimulation. Gen. Comp. Endocrinol. 2006;146(2):86-94.

Al Kahtane, A., S.W. Kang, M. Kannan, and M.E. El Halawani. 2005. Regulation of prolactin gene expression by vasoactive intestinal peptide and dopamine: Role of Ca 2+ signaling. J. Neuroendocrinol. 17(10):649-655.

Chaiseha, Y. and M.E. El Halawani. 2005. Neuroendocrinology of the Female Turkey Reproductive Cycle. J. Poultry Sci. 42: 87-100 (Invited Review).

Kulick, R.S., Y. Chaiseha, S.W. Kang, I. Rozenboim, and M.E. El Halawani. 2005. The relative importance of vasoactive intestinal peptide and peptide histidine isoleucine as physiological regulators of prolactin in the domestic turkey. Gen. Comp. Endocrinol. 142(3):267-273.

Chaiseha, Y., O.M. Youngren, and M.E. El Halawani. 2004. Expression of vasoactive intestinal peptide receptor messenger RNA in the hypothalamus and pituitary throughout the turkey reproductive cycle. Biol. Reprod. 70:535-542.

El Halawani, M.E. 2004. Dopaminergic regulation of reproduction in the female turkey. 8th International Symposium on Avian Endocrinology (ISAE), Phoenix, Arizona, USA.

El Halawani, M.E. 2004. Euroendocrinology of prolactin regulation in the domestic turkey. Society for the Study of Reproduction (SSR) Symposium on Neuroendocrinology of Farm Animals, sponsored by USDA, NRI, Vancouver, Canada.

Kang, S.W., L.C. Gazzillo, S. You, E.A. Wong, and M.E. El Halawani. 2004. Localization of a VIP response element (VRE) in the proximal promoter of the turkey prolactin gene. Gen. Comp. Endocrinol. 138:157-165.

Lohmus, M., M. Olin, L.F. Sundstrom, M.H. Troedsson, T.W. Molitor, and M. El Halawani. 2004. Leptin increases T-cell immune response in birds. Gen Comp Endocrinol. 2004 Dec;139(3):245-50.

Rozenboim, I., N. Mobarky, R. Heiblum, Y. Chaiseha, S.W. Kang, I. Biran, A. Rosenstrauch, D. Sklan, and M.E. El Halawani. 2004. The role of prolactin in reproductive failure associated with heat stress in the domestic turkey. Biol. Reprod. 2004 Oct:71(4):1208-13.

Al Kahtane, A., Y. Chaiseha, and M. El Halawani. 2003. Dopaminergic regulation of avian prolactin gene transcription. J. Mol. Endocrinol. 31:185-196.

Bhatt, R., O. Youngren, S. Kang, and M. El Halawani. 2003. Dopamine infusion into the third ventricle increases gene expression of hypothalamic vasoactive intestinal peptide and pituitary prolactin and luteinizing hormone beta subunit in the turkey. Gen. Comp. Endocrinol. 2003 Jan;130(1):41-7.

Chaiseha, Y., O. Youngren, K. Al-Zailaie, and M. El Halawani. 2003. Expression of D1 and D2 dopamine receptors in the hypothalamus and pituitary during the turkey reproductive cycle: colocalization with vasoactive intestinal peptide. Neuroendocrinology 2003 Feb;77(2):105-18.

Lohmus, M., L.F. Sundstrom, M. El Halawani, and B. Silverin. 2003. Leptin depresses food intake in great tits (Parus major). Gen. Comp. Endocrinol. 2003 Mar;131(1):57-61.

Rozenboim, I., R. Huisinga, O. Halevy, and M.E. EI Halawani. 2003. Effect of embryonic hotostimulation on post-hatch growth of turkey poults. Poultry Sci. 82:1181-1187

Rozenboim, I., A. Navot, N. Snapir, A. Rosenstrauch, M.E. El Halawani, G. Gvaryahu, and A. Degen. 2003. Methods for collecting semen from the ostrich (struthio camelus) and some of its quantitative and qualitative characteristics. British Poultry Sci. 44:607-611.

Yupaporn, C., O. Youngren, K. Al-Zailaie, and M. EI Halawani. 2003. Expression of D1 and D2 Dopamine receptors in the hypothalamus and pituitary during the turkey reproductive cycle: colocalization with vasoactive intestinal peptide. Neuroendocrinology 610(2):59-73.

Kang, S.W., S. You, E.A. Wong, and M.E. El Halawani. 2002. Normalization of transfection efficiency using the beta-lactamase gene of the pGL3 luciferase vector in primary anterior pituitary cells. Biotechniques 2002 Aug;33(2):326-8, 330.

Kang, S.W., O.M. Youngren, and M.E. El Halawani. 2002. Influence of VIP on prolactinemia in turkey anterior pituitary cells: role of cAMP second messenger in VIP-induced prolactin gene expression. Regul. Pep. 2002 Nov. 15;109(1-3):39-44.

Youngren, O., Y. Chaiseha, K. Al-Zailaie, S. Whiting, S. Kang, and M. El Halawani. 2002. Regulation of prolactin secretion by dopamine at the level of the hypothalamus in the turkey. Neuroendocrinology 75:185-192.

Ahn, J., S. You, H. Kim, Y. Chaiseha, and M. El Halawani. 2001. Effects of active immunization with inhibin alpha subunit on reproductive characteristics of turkey hens. Biol. Reprod. 65:1594-1600.

Ahn, J., S. You, H. Kim, D.N. Foster, and M.E. El Halawani. 2001. Molecular cloning and expression of turkey inhibin-alpha and -betaA subunits. Poultry Sci. 80:1690-1694.

Farnell, M.B., M. El Halawani, S. You, A.P. McElroy, B.M. Hargis, and D.J. Caldwell. 2001. In vivo biologic effects of recombinant-turkey interferon-gamma in neonatal leghorn chicks: protection against Salmonella enteritidis organ invasion. Avian Dis. 45:473-478.

Gahali, K., M.E. El Halawani, and I. Rozenboim. 2001. Photostimulated prolactin release in the Turkey hen: effect of ovariectomy and environmental temperature. Gen. Comp. Endocrinol. 124:166-172.

You, S., C.C. Hsu, H. Kim, Y. Kho, Y.J. Choi, M.E. El Halawani, J. Farris, and D.N. Foster. 2001. Molecular cloning and expression analysis of the turkey vasoactive intestinal peptide receptor. Gen. Comp. Endocrinol. 124:53-65.

Bluhm, C.K., I. Rozenboim, J. Silsby, and M. El Halawani. 2000. Sex-related differences in the effects of late winter pairing activity and seasonal influences on neuroendocrinology and gonadal development of mallards. Gen. Comp. Endocrinol. 118:310-321.

El Halawani, M.E., S.E. Whiting, J.L. Silsby, G.R. Pitts, and Y. Chaiseha. 2000. Active immunization with vasoactive intestinal peptide in turkey hens. Poultry Sci. 79:349-354.

Pitts, G.R., S. You, D.N. Foster, and M.E. El Halawani. 2000. Evidence for multiple prolactin receptor transcripts in the turkey. Poultry Sci. 79:355-362.

You, S., M.E. El Halawani, and D.N. Foster. 2000. Three different turkey luteinizing hormone receptor (tLH-R) isoforms I: Characterization of alternatively-spliced tLH-R isoforms and their regulated expression in diverse tissues. Biol. Reprod. 62:108-116.

You, S., C-C. Hsu, M.E. El Halawani, and D.N. Foster. 2000. Three different turkey luteinizing hormone receptor (tLH-R) isoforms II: Characterization of differentially-regulated tLH-R isoforms in the ovary. Biol. Reprod. 62:117-124.

Yoo, S.J., S. You, H. Kim, S.C. Kim, Y.-J. Choi, M.E. El Halawani, J. Farris, and D.N. Foster. 2000. Molecular cloning and characterization of alternatively spliced transcripts of the turkey pituitary adenylate cyclase activating polypeptide. Gen. Comp. Endocrinol. 120: 326-335.

Youngren, O.M., G.R. Pitts, Y. Chaiseha, and M.E. El Halawani. 1999. An opioid pathway in the hypothalamus of the turkey that stimulates prolactin secretion. Neuroendocrinology 70(5):317-323.

Buntin, J.D., M.E. El Halawani, M.A. Ottinger, Y. Fan, and A.J. Fiuizzani. 1998. An analysis of sex and breeding stage differences in prolactin binding activity in brain and hypothalamic GnRH concentration in Wilson’s phalarope, a sex role-reversed species. Gen. Comp. Endocrinol. 109:119-132.

Chaiseha, Y., Z. Tong, O.M. Youngren, and M.E. El Halawani. 1998. Transcriptional changes in hypothalamic vasoactive intestinal peptide during a photo-induced reproductive cycle in the turkey. J. Mol. Endocrinol. 21(3):267-275.

Chaiseha, Y., O. Youngren, and M.E. El Halawani. 1998. Vasoactive intestinal peptide secretion by turkey hypothalamic explants. Biol. Reprod. 59:670-675.

Millam, J.R., M.A. Ottinger, C.B. Craig-Veit, Y. Fan, Y. Chaiseha, and M.E. El Halawani. 1998. Multiple forms of GnRH are released from perfused medial basal hypothalamic/preoptic area (MBH/POA) explants in birds. Gen. Comp. Endocrinol. 111:95-101.

Tong, Z., G.R. Pitts, S. You, D.N. Foster, and M.E. El Halawani. 1998. Vasoactive intestinal peptide stimulates turkey prolactin gene expression by increasing transcription rate and enhancing mRNA stability. J. Mol. Endocrinol. 21(3):259-266.

Youngren, O,M., Y. Chaiseha, and M.E. El Halawani. 1998. Regulation of prolactin secretion by dopamine and vasoactive intestinal peptide at the level of the pituitary in the turkey. Neuroendocrinology 68:319-325.

Youngren, O.M., Y. Chaiseha, and M.E. El Halawani. 1998. Serotonergic stimulation of avian prolactin secretion requires on intact dopaminergic system. Gen. Comp. Endocrinol. 112:63-68.

Bluhm, C., I. Rozenboim, J. Silsby, and M.E. El Halawani. 1997. Effects of late winter pairing activity on neuroendocrinology of mallards: Hypothalamic contents of vasoactive intestinal peptide, gonadotrophin releasing hormones I and II, serum luteinizing hormone, and prolactin. Gen. Comp. Endocrinol. 108:446-456.

Chaiseha, Y., O.M. Youngren, and M.E. El Halawani. 1997. Dopamine receptors influence vasoactive intestinal peptide release from turkey hypothalamic explants. Neuroendocrinology 65:423-429.

El Halawani, M.E., O.M. Youngren, and G.R. Pitts. 1997. Vasoactive intestinal peptide as the avian prolactin releasing factor. In Perspectives in Avian Endocrinology. Eds., R. Etches, S. Harvey, Bristol. The Society of Endocrinology, pp. 403-416.

Tong, Z., G.R. Pitts, D.N. Foster, and M.E. El Halawani. 1997. Transcriptional and post-transcriptional regulation of prolactin during the turkey reproductive cycle. J. Mol. Endocrinol. 18:223-231.

El Halawani, M.E., G.R. Pitts, S. Sun, J.L. Silsby, and V. Sivanandan. 1996. Active immunization against vasoactive intestinal peptide prevents photo-induced prolactin secretion in turkeys. Gen. Comp. Endocrinol. 104:76-83.

Millam, J.R., B. Zhang, and M.E. El Halawani. 1996. Egg production of cockatiels (Nymphicus hollandicus) is influenced by number of eggs in the nest after incubation begins. Gen. Comp. Endocrinol. 101:205-210.

Pitts, G.R., O.M. Youngren, R.E. Phillips, and M.E. El Halawani. 1996. Photoperiod mediates the ability of serotonin to release prolactin in the turkey. Gen. Comp. Endocrinol. 104:265-272.

Rozenboim, I., G.R. Pitts, O.M. Youngren, and M.E. El Halawani. 1996. Effect of maternal passive immunization against vasoactive intestinal peptide on prolactin secretion in turkey poults. Biol. Reprod. 54: 670-674.

Youngren, O.M., G.R. Pitts, R.E. Phillips, and M.E. El Halawani. 1996. Dopaminergic control of prolactin in the turkey. Neuroendocrinology 104:225-230.

Youngren, O., Y. Chaiseha, R. Phillips and M. El Halawani. 1996. Vasoactive intestinal peptide concentrations in turkey hypophysial portal blood differ across the reproductive cycle. Gen. Comp. Endocrinol. 103:323-330.

El Halawani, M.E., J.L. Silsby, and I. Rozenboim. 1995. Increased egg production by active immunization against vasoactive intestinal peptide in the turkey (Meleagris gallopavo). Biol. Reprod. 52: 179-183.

Youngren, O.M., G.R. Pitts, R.E. Phillips, and M.E. El Halawani. 1995. The stimulatory and inhibitory effects of dopamine on prolactin secretion in the turkey. Gen. Comp. Endocrinol. 98: 111-117.

Book Chapters

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El Halawani, M.E., O.M. Youngren, and Y. Chaiseha. 2001. Neuroendocrinology of prolactin regulation in the domestic turkey. In: Avian Endocrinology. A. Dawson and C. M. Chaturvedi (Eds.), Narosa Publishing House, New Delhi, India. pp. 233-244.

Porter, T.E. and M.E. El Halawani. 2001. Regulation of lactotrophs and prolactin secretion in non-mammalian vertebrates. In: Prolactin. N. Horseman (Ed.), Kluwer Academic Publishers, Boston, MA. pp. 63-79.

Invited Papers and Conference Proceedings

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El Halawani, M.E. 2006. Light spectrum and breeder hen turkeys egg production. Proc. Midwest Poultry Fed. Conv.

El Halawani, M.E. 2006. Light spectrum requirement to maximizing breeder hen turkey egg production. Proc. Turkey Research Review.

El Halawani, M.E. 2005. Light spectrum requirement to maximizing breeder hen turkey egg production. Proc. Turkey Research Review and Avian Pneumovirus Symp.

El Halawani, M.E. and Y. Chaiseha. 2003. Broodiness in turkey breeder hens. Proc. Int. Symp. Turkey Reprod., Raleigh, NC. Oct. 2003.

El Halawani, M.E. and S. You. 1998. Turkey incubation behavior: From molecular biology to field biology. Proc. 10th European Poultry Conference. Vol. 1:151-155.

Wong, E.A., A.L. Wentworth, B.C. Wentworth, J.A. Proudman, and M.E. El Halawani. 1998. Generation of transgenic poultry by transfection of primordial germ cells. Proc. Transgenic Animals in Agriculture. J. Murry, G. Anderson, M. Gloughlin, M. Charhauer (Eds.), CAB International, Wallingford, UK.

Wentworth, B., H. Tsai, A. Wentworth, E. Wong, J. Proudman, and M. El Halawani. 1996. Primordial germ cells for the genetic modification of poultry. Proc. Beltsville Symp. Avian Transgenic Tech. Am. Soc. An. Sci. pp 202-227.

Xu, M., J.A. Proudman, G.R.Pitts, E.A. Wong, D.N. Foster, and M.E. El Halawani. 1996. Vasocative intestinal peptide stimulates prolactin mRNA expression in turkey pituitary cells: Effects of dopaminergic drugs. Proc. Soc. Exp. Biol. Med. 212: 52-62.

Industry Publications

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El Halawani, M.E. and S. Kosonsiriluk. 2013. Light spectrum requirement for maximizing breeder hen turkey’s egg production. Gobbles. 70:4-8.

El Halawani, M.E. and S. Kosonsiriluk. 2011. Blue light photopigment influences breeder hen turkey’s egg production. Gobbles 68 (4):8-9.

El Halawani, M.E. 2010. Effect of thermal conditioning on breeder turkeys reproductive performance. Gobbles 67 (4):7-8.

El Halawani, M.E. 2009. Light intensity requirement for breeder hen turkeys. Gobbles 66 (4):4-6.

El Halawani, M.E. 2008. Effect of thermal conditioning during the prebreeder period on breeder hen turkey’s reproductive performance. Gobbles 65 (4):10-13.

Abstracts

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Kang, S.W., S. Kosonsiriluk, and M.E. El Halawani. 2010. Gene expression of thyroid hormone regulating elements in reproductively photosensitive and photorefractory turkey hens. Poult. Sci. Vol. 89, Suppl. 1: 290.

Kang, SW, S. Kosonsiriluk, J. Welch, and M.E. El Halawani. 2010. Effect of thermal preconditioning during the prebreeder period on breeder turkey hens’ reproductive performance. Poult. Sci. Vol. 89, E-Suppl. 1: 116.

Kosonsiriluk, S., S.W. Kang, L.J. Mauro, J.R. Garbe, S.C. Fahrenkrug, and M.E. El Halawani. 2010. Gene expression profiling of dopamine-melatonin neurons in the avian premammillary nucleus. Poult. Sci. Vol. 89, Suppl. 1: 564.

Kang, S.W., B. Leclerc, and M.E. El Halawani. 2009. Melanopsin in the premammillary nucleus of the avian hypothalamus may trigger seasonal reproduction. Poultry Sci. 88 (Suppl. 1): 22.

Leclerc, B., S.W. Kang, L.J. Mauro., S. Kosonsiriluk, and M.E. El Halawani. 2009. Photoperiodic modulation of clock gene expression in the avian premammillary nucleus dopamine-melatonin neurons. Poultry Sci. 88 (Suppl. 1): 127.

Prakobsaeng, N., N. Sartsoongnoen, S. Kosonsiriluk, I. Rozenboim, M.E. El Halawani, T.E. Porter, and Y. Chaiseha. 2009. Changes in vasoactive intestinal peptide and gonadotropin releasing hormone-I immunoreactivity in the brain of nest-deprived native Thai Hen. Poultry Sci. 88 (Suppl. 1): 127.

El Halawani, M.E., S.W. Kang, A. Thayananuphat, and B. Leclerc. 2008. Dopamine-melatonin neurons in the avian hypothalamus and their role as photoperiodic clocks. 9th Int. Symposia. Avian Endocrinol. 48.

Kang, S.W., B. Leclerc, L.J. Mauro, and M.E. EI Halawani. 2008. Serotonergic and catecholaminergic interactions with co- localized dopamine-melatonin neurons in the hypothalamic premammillary nucleus of the female turkey during different reproductive states. Poult. Sci. 87(Suppl.1): 15-16.

Leclerc, B., S. Kang, C. Howell, L. Mauro, and M.E. El Halawani. 2008. Circadian expression of clock genes in the pineal gland, visual suprachiasmatic nucleus (vSCN) and premammillary nucleus (PMM) in photostimulated turkey hens. Poult. Sci. 87(Suppl.1): 14.

Prakobsaeng, N., N. Sartsoongnoen, S. Kosonsiriluk, T. Songsenn, I. Rozenboim, M.E. El Halawani, and Y. Chaiseha. 2008. Changes in vasoactive intestinal peptide immunoreactivity in the brain of nest-deprived native Thai hens. Poult. Sci. 87(Suppl.1): 86.

Sartsoongnoen, S., T. Kosonsiriluk, N. Prakobsaeng, T. Songsenn, M.E. El Halawani, and Y. Chaiseha. 2008. Localization and differential expression in the number of dopamine neurons across the reproductive cycle of the native Thai chicken. 9th Int. Symposia. Avian Endocrinol. 69.

Bakken, T., S.W. Kang, A. Thayananuphat, J.A. Proudman, and M.E. El Halawani. 2006. Expression of 5-HT1A and 5-HT2C receptors in the hypothalamus during the turkey reproductive cycle: Colocalization with tyrosine hydroxylase. Poultry Sci. 85 (Suppl. 1): 42.

Kang, S.W., T. Bakken, and M.E. El Halawani. 2006. Characterization of the serotonergic system in the brainstem during the turkey reproductive cycle. Poultry Sci. 85 (Suppl. 1):43.

Kosonsiriluk, S., N. Sartsoongnoen, N. Prakobsaeng, T. Bakken, T. Songserm, M.E. El Halawani, and Y. Chaiseha. 2006. Distribution of vasoactive intestinal peptide-expressing neurons in the brain of the native Thai chicken (Gallus domesticus). Poultry Sci. 85 (Suppl. 1): 45.

Rozenboim, I., N. Mobarkey, and M.E. El Halawani. 2006. The role of the retinal and extra retinal photoreceptors in reproductive activities of broiler breeder hens. Poultry Sci. 85 (Suppl. 1): 40.

Sartsoongnoen, N., S. Kosonsiriluk, S.W. Kang, J.R. Millam, M.E. El Halawani, and Y. Chaiseha. 2006. Distribution of cGnRH-I immunoreactive neurons and fibers in the brain of native Thai chicken (Gallus domesticus). Poultry Sci. 85 (Suppl. 1): 45.

Sartsoongnoen, N., S. Kosonsiriluk, N. Prakobsaeng, A. Thayananuphat, T. Songserm, M.E. El Halawani, and Y. Chaiseha. 2006. Immunohistochemical localization of dopamine neurons in the brain of the native Thai chicken (Gallus domesticus). Poultry Sci. 85 (Suppl. 1): 45.

Thayananuphat, A., S.W. Kang, T. Bakken, J.R. Millam, and M.E. El Halawani. 2006. Dopamine and gonadotrophin releasing hormone-I neuronal activation following photostimulation in the turkey. Poultry Sci. 85 (Suppl. 1): 43.

El Halawani, M., O. Youngren, J. Proudman, and Y. Chaiseha. 2005. Serotonin receptor subtypes influence prolactin secretion in the turkey. Poultry Sci. 84 (Suppl. 1): 45.

Kang, S., O. Youngren, T. Bakken, and M. El Halawani. 2005. Distribution of serotonergic neurons and fibers and interaction with dopaminergic neurons in the turkey hypothalamus and brainstem. Poultry Sci. 84 (Suppl. 1): 74.

Rozenboim, I., N. Mobarkey, O. Oshpiz, N. Avital, R. Heiblum, and M. El Halawani. 2005.The role of retinal and extra-retinal photoreceptors in reproductive activities of broiler breeder hens. Poultry Sci. 84 (Suppl. 1): 74.

Thayananuphat, A., O. Youngren, S. Kang, T. Bakken, J. Proudman, and M. El Halawani. 2005. Effects of dopamine and oxytocin receptor antagonists on the transition to brooding of young in turkeys. Poultry Sci. 84 (Suppl. 1): 31.

Chaiseha Y., O.M. Youngren, and M.E. El Halawani. 2003. Coexpression of dopamine or vasoactive intestinal peptide receptors with prolactin in the turkey pituitary. Poultry Sci. 82 (Suppl. 1): 44.

Kang, S.W., O.M. Youngren, and M.E. El Halawani. 2003. Time-dependent c-fos expression as a neuronal activation marker following electrical stimulation in the turkey hypothalamus. Poultry Sci. 82 (Suppl. 1): 44.

Thayananuphat, A., S.W. Kang, K. Al-Zailaie, O.M. Youngren, and M.E. El Halawani. 2003. Tyrosine hydroxylase mRNA expression in the turkey hypothalamus. Poultry Sci. 82 (Suppl. 1): 44.

Al-Zailaie, K. and M. El Halawani. 2002. Alterations in GnRH-1 within the turkey hypothalamus throughout the reproductive cycle. Poultry Sci. 80 (Suppl. 1): 29.

Al-Kahtane, A. and M. El Halawani. 2002. Involvement of extra- and intra-cellular Ca2+ in the regulation of PRL secretion by VIP and dopamine in turkey pituitary cells. Poultry Sci. 80 (Suppl. 1): 28.

Bakken, T., S.W. Kang, S. Whiting, and M.E. El Halawani. 2002. Vasoactive intestinal peptide-stimulated prolactin promoter activity is inhibited by a D2 dopamine receptor agonist. Poultry Sci. 80 (Suppl. 1): 28.

Chaiseha, Y., O.M. Youngren, and M.E. El Halawani. 2002. Expression of vasoactive intestinal peptide receptor mRNA in the hypothalamus and pituitary throughout the turkey reproductive cycle. Poultry Sci. 80 (Suppl. 1): 45.

Kang, S.W., T. Bakken, and M.E. EI Halawani. 2002. The suppressive effect of prolactin on prolactin promoter activity in primary anterior pituitary cells from turkey hens. Poultry Sci. 80 (Suppl. 1): 45.

Youngren, O.M. and M.E. El Halawani. 2002. Inhibitory and stimulatory effects of serotonin (5-HT) on prolactin (PRL) secretion in the turkey. Poultry Sci. 80 (Suppl. 1): 44.

Al-Kahtane, A., D. Deepak, M. Kannan, and M. El Halawani. 2001. Regulation of prolactin gene expression by vasoactive intestinal peptide and dopamine: role of Ca2+ signaling. Poultry Sci. 79 (Suppl. 1): 174.

Al-Zailaie, K., O. Youngren, and M. El Halawani. 2001. Localization of neurons projecting to the infundibular nuclear complex and the median eminence in the turkey hypothalamus. Poultry Sci. 79 (Suppl. 1): 175.

Beltran, R., P. Augustine, M. El Halawani, H. Danforth, A. McElroy, and D. Caldwell. 2001. In vitro or in vivo effects of recombinant turkey interferon gamma (rtIFNγ) on eimeria invasion of infection. Poultry Sci 79 (Suppl 1): 302.

Chaiseha, Y., O.M. Youngren, S.A. Schnell, and M.E. El Halawani. 2001. Expression of D1 and D2 dopamine receptors in the hypothalamus and pituitary during the turkey reproductive cycle. Poultry Sci. 79 (Suppl. 1): 174.

Kang, S., S. You, E. Wong, T. Bakken, and M. El Halawani. 2001. Characterization of the VIP response element (VRE) in turkey prolactin promoter. Poultry Sci. 79 (Suppl 1): 175.

Kang, S.W., L.C. Gazzillo, S. You, E.A. Wong, and M.E. El Halawani. 2001. Regulation of prolactin promoter by vasoactive intestinal peptide in the turkey. Regulatory Peptides 102: 58.

Youngren, O.M., Y. Chaiseha, S.E. Whiting, and M.E. El Halawani. 2001. Dopaminergic neurotransmission controlling PRL/VIP secretion in the turkey. Poultry Sci. 79 (Suppl. 1): 174.

Al-Kahtane, A., Y. Chaiseha, and M.E. El Halawani. 2000. Role of vasoactive intestinal peptide and dopamine in transcriptional regulation of prolactin in turkey pituitary cells. Poultry Sci. 79 (Suppl. 1): 50.

Al-Zailaie, K. and M. El Halawani. 2000. Neuroanatomical relationship between immunoreactive dopamine and vasoactive intestinal peptide neurons in the turkey hypothalamus. Poultry Sci. 79 (Suppl. 1): 50.

El Halawani, M.E., O.M. Youngren, and Y. Chaiseha. 2000. Neuroendocrinology of prolactin regulation in the domestic turkey. VII Int. Symp. Avian Endo. p. 3.

Kang, S.W., S. You, E. Wong, and M.E. El Halawani. 2000. Regulation of prolactin promoter in turkey primary pituitary cells. Poultry Sci. 79 (Suppl. 1): 50.

Ahn, J., S. You, and M. El Halawani. 1999. Active immunization against inhibin- I subunit increases the number of non-graded ovarian yellow follicles in the turkey. Poultry Sci. 78 (Suppl. 1): 65.

Famell, M.B., S. You, M.E. El Halawani, B.M. Hargis, and P.J. Caldwell. 1999. Effect of rtIFNY on salmonella enteritidis organ invation in leghorn chicks. Poultry Sci. 78 (Suppl. 1): 107.

Kulick, R., S. Whiting, G. Pitts, S. You, and M. El Halawani. 1999. Vasoactive intestinal peptide but not peptide histidine isoleucine as a physiological regulator of prolactin in the domestic turkey. Poultry Sci. 78 (Suppl. 1): 65.

Youngren, O., G. Pitts, and M. El Halawani. 1999. Partial characterization of an opiate pathway modulating prolactin secretion in the turkey. Poultry Sci. 78 (Suppl. 1): 65.

Chaiseha, Y. and M.E. El Halawani. 1998. Vasoactive intestinal peptide/peptide histidine isoleucine gene expression in the female turkey during the reproductive cycle. Poultry Sci. 77 (Suppl. 1): 16.

El Halawani, M.E. and S. You. 1998. Turkey incubation behavior: from molecular biology to field biology. 10th Europ. Poult. Conf., Jerusalem, Israel. p. 122.

Pitts, G.R. and M.E. El Halawani. 1998. The use of microdialysis to determine the effects of serotonin, stress, and light on monoamines in the turkey hypothalamus. Poultry Sci. 77 (Suppl. 1): 16.

You, S., I-J. Kim, J. Ahn, J.M. Sharma, and M.E. El Halawani. 1998. Molecular cloning and biological functions of turkey interferon- g. Poultry Sci. 77 (Suppl. 1): 99.

Youngren, O.M., Y. Chaiseha, and M.E. El Halawani. 1998. Dopamine inhibits prolactin secretion induced by vasoactive intestinal peptide via D2 dopamine receptors in the turkey pituitary. Poultry Sci. 77 (Suppl. 1): 16.

Youngren, O.M., Y. Chaiseha, and M.E. El Halawani. 1998. Serotonergic stimulation of avian prolactin secretion requires an intact dopaminergic system. Poultry Sci. 77 (Suppl. 1): 16.

Ahn, J., S. You, D.N. Foster, and M.E. El Halawani. 1997. Molecular cloning of turkey inhibin a - and b A-subunit cDNA. Poultry Sci. 76 (Suppl. 1): 46.

Chaiseha, Y., Z. Tong, O.M. Youngren, and M.E. El Halawani. 1997. Transcriptional regulation of hypothalamic vasoactive intestinal peptide during the turkey reproductive cycle. Poultry Sci. 76 (Suppl 1): 47.

El Halawani, M.E. and S.L. Noll. 1997. Effect of prebreeder lighting and nutrition on subsequent reproductive performance of female turkeys. Poultry Sci. 76 (Suppl. 1): 90.

Schnell, S.A., S. You, D.N. Foster, and M.E. El Halawani. 1997. Molecular characterization of alternatively-spliced avian D 2 dopamine receptors and quantification of mRNA expression during the reproductive cycle of the domestic turkey. Poultry Sci. 75 (Suppl. 1): 24

Schnell, S.A., S. You, D.N. Foster, and M.E. El Halawani. 1997. RT-PCR analysis of D 1 dopamine receptor subtypes in turkey brain. Neurosci. 22(2): 1349.

Yoo, S-J., S. You, M.E. El Halawani, and D.N. Foster. 1997. Partial cloning of the turkey pituitary adenylate cyclase activating polypeptide cDNA and its expression. Poultry Sci. 76 (Suppl. 1): 47.

You, S., C-C Hsu, M.E. El Halawani, and D.N. Foster. 1997. Novel expression of alternatively-spliced turkey luteinizing hormone receptor (tLH-R) isoforms in various nongonadal tissues. Poultry Sci. 76 (Suppl. 1): 47.

Bluhm, C. and M.E. El Halawani. 1996. Effect of active immunization against vasoactive intestinal peptide (VIP) on prolactin, hypothalamic VIP content, and egg production in Mallards. VI Int’l. Symp. Avian Endocrinol.

El Halawani, M.E., S.E. Whiting, J.L. Silsby, and G.R. Pitts. 1996. Active immunization against vasoactive intestinal peptide in first and second cycle turkey hens. Poultry Sci. 75 (Suppl. 1): 93.

El Halawani, M.E., O. Youngren, and G. Pitts. 1996. Vasoactive intestinal peptide as the avian prolactin-releasing factor. VI Int’l. Symp. Avian Endocrinol.

Tong, Z., D.N. Foster, and M.E. El Halawani. 1996. Post-transcriptional regulation of prolactin mRNA steady-state levels during the reproductive cycle of the female turkey. Poultry Sci. 75 (Suppl. 1): 17.

Youngren, O.M., Y. Chaiseha, R.E. Phillips, and M.E. El Halawani. 1996. Vasoactive intestinal peptide concentrations in turkey hypophysial portal blood differ across the reproductive cycle. Poultry Sci. 75 (Suppl. 1): 93.

Chaiseha, Y., O.M. Youngren, R.E. Phillips, and M.E. El Halawani. 1995. Opposing actions of D 1 and D 2 dopamine receptors on vasoactive intestinal peptide release by turkey hypothalamic explants. Poultry Sci. 74 (Suppl. 1): 115.

El Halawani, M.E., G.R. Pitts, S. Sun, J.L. Silsby, and V. Sivanandan. 1995. Active immunization against vasoactive intestinal peptide presents photoperiodically stimulated prolactin secretion in turkeys. Poultry Sci. 74 (Suppl. 1): 157.

Hsu, C.-C., S. You, M.E. El Halawani, and D.N. Foster. 1995. Cloning of a partial avian VIP receptor fragment. Poultry Sci. 74 (Suppl. 1): 116.

Kamyab, A., M. El Halawani, S. Noll, and D. Shaw. 1995. Influence of lighting program, litter type and dietary salt on market tom performance and litter characteristics. Poultry Sci. 74 (Suppl. 1): 81.

Noll, S.L., M. El Halawani, and P.E. Waibel. 1995. Effect of temperature environment and dietary vitamin C supplementation on turkey breeder hens. Poultry Sci. 74 (Suppl. 1): 45.

Pitts, G.R., S. You, D.N. Foster, and M.E. El Halawani. 1995. Prolactin receptor mRNA quantification in the domestic turkey (Meleagris gallopavo). Poultry Sci. 74 (Suppl. 1): 114.

Sun, S.-S., E. A. Wong, J.A. Proudman, B. Wentworth, and M.E. El Halawani. 1995. Prolactin antisense DNA and RNA blocks cVIP-stimulated prolactin secretion from cultured turkey pituitary cells. Poultry Sci. 74 (Suppl. 1): 157.

Tong, Z., D.N. Foster, and M.E. El Halawani. 1995. Transcriptional regulation of the turkey prolactin gene during a photo-induced reproductive cycle. Poultry Sci. 74 (Suppl. 1): 114.

You, S., C.-C. Hsu, M.E. El Halawani, and D.N. Foster. 1995. Cloned partial turkey inhibin _-, A-, and B-subunit cDNAs and analysis of expression during the stages of ovarian follicular development. Poultry Sci. 74 (Suppl. 1): 35.

You, S., C.-C. Hsu, M.E. El Halawani, and D.N. Foster. 1995. Cloning of a partial turkey cytochrome P-450 17_-hydroxylase and P-450 aromatase cDNAs, analysis of their expression during the stages of ovarian follicular development. Poultry Sci. 74 (Suppl. 1): 34.

Youngren, O.M., M.E. El Halawani, G.R. Pitts, and R.E. Phillips. 1995. The paradoxical effects of dopamine on prolactin secretion in the turkey. Poultry Sci. 74 (Suppl. 1): 157.