Serum levels of prolacin and alpha- melanotrophin and structure of the ovary during the reproductive cycle of Columba livia domestic pigeon
DOI:
https://doi.org/10.31053/1853.0605.v52.n2.40933Keywords:
prolactin, alpha-melanotrophin, reproductive cycle, ovarian structure, columbia liviaAbstract
Given the ilnportance of the hormones prolactin and alpha-melanotrophin in the regulation ofthe mamnial ian reproductive cycle, it was decided to assess their serum levels during the reproductive cycle ofCoiumba ¡ip/a (domestic pigeon).
Fernale pigeons were utilized ¡ti the stages of egg-laying, incubation and rearing.
Simultaneous!y, the structural changes of the ovary in the aforeinentioned periods were studied. The levels of prolactin and alpha- nielanotrophin showed similar behaviour. TI-telow concentrations found in the period of egg- laying (x + s = 4.3 ± 0.6 ; 3.5 ± 0.26 ng/mI) increased significantly during incubation (x ± s =6.5 -±0.7 ng/ml ;6.6± 1.7 ng/mI) to reach the maxiniun value in therearingperiod(x± s= 10.33 ± 1.8 ng/ml ; 13.6± 1.9 ng/mI). Accompanying these changes a marked predoniinancc of the
niedullary zone over the cortex and lack of developing follicles were found in the rearing state.
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References
Buntin J D, Forsvth 1 A: Measurements of pituitary prolactin levcls in breeding pigeons by crol) sae radioreceptor assay. Gen Com
Endocrinol 37: 57-63. 1979.
Cheng M F. Burke WH: Serum prolactin lcvels and crop-sac development in ring doves during a breeding cycle. 1-lormones and behavior 17: 54-65, 1983.
Dóhlcr K D, Von Zur Müklen A. Dühler U: Pituitary Luteinizing Horinone (LH), Follicle Stimulating Hormone (FSlI) and Pro] actin from birth to puhcrty in feniale and nialc rats. Acta Endocrinologica 85: 718-728, 1977.
EtchesR, MCNeillv AS, DukeC E: Plasma concentrations of prolactin during the reproductive cycle of the domcstic turkcy. Poultry Science 58: 963-970, 1979.
Halawani M. Behnke R: Effects ofestrogen and progesterone on serum prolactin and LI-I levels in ovariectomized tureys Meleagris gallopavo. GenConip Endocrino! 52:67-78, 1983.
Haywood S: Sensory and hormonal control ofclutch size in birds. Quart Rey Biol 68:33- 60, 1993.
Khorram O, Me Cann S: Physiological role of alpha-MSI-1 in modulati ng the sccrction ofprolactin and luteinizing hormone in the
female rat. Physiological Sc 81, 1984a.
KhorramO,McCann S: Effectofalfa-MSI-1 on basa] and stimulated release of prolactin, evidence for dopaminergic mediation. Neuroeridocrinology 34: 433-437, 1984b.
Lea R W. Dods S M, Sharp P J, Chadwic1 A: The possible role of prolactin in the regulation of nesting behaviour and the secretion of luteinizing horinone in Broody bantams. J Endocrino! 91: 89-9711981.
Milano Grassi E: Effccts of follicle- stimulating hormone, luteinizing horrnone and prolactin on left and right gonads of fernale chick embryos in culture. l3xptl Cdl Biol 52: 326-332, 1984.
II. SelmanoffM, Gregerson K: Autofeedback effects ofprolactin on basa] suckling induced and proestrus secretion of prolactin. Proc Soc Exp Biol Mcd 175: 398-405, 1980.
Shani J. Furr B J A, Forsyth 1 A: A re- examination of the antigonadal effect of prolactin in the male fowl, Gallus domesticus. J Reprod Fert 34: 167-170, 1973.
Sokal R. Rohtl F: Análisis de lavarianza. En: Bionietria. Principios y Métodos Estadisticos en la Investigación Biológica. 1-1. Blume Ediciones, Madrid, 1979. p28!.
Talcisnik S, Orias R: A melano-stiniulating hormone-releasing factor in hypothalamic extracts. Am J Physiol 208: 293-296, 1965.
VivasA. CclisM E: Difference in therelease of alfa-rvISF1 in vitro by rat pituitary glands collected at various times during the oestrus cycle. J Endoc 78: 1-6, 1977.
'ollosin M, Celis ME: Evidencefordie role of alfa-MSH in the induction of pseudopregnancy ¡Ti the rat. Neuroendocrinology 39: 13-18, 1984.
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