COEXPRESSION OF GONADOTROPIN INHIBITORY HORMONE AND GONADOTROPIN RELEASING HORMONE NEURONS IN THE PREOPTIC AREA OF HYPOTHALAMUS IN THE PHASES OF ESTROUS CYCLE OF THE EWE

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JAFARZADEH SHIRAZI M.R.; NAMAVAR M.R.; TAMADON A.

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Journal: Anatomical Sciences Journal Year:2011 | Volume:9 | Issue:34 Page(s): 64-70

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Title

COEXPRESSION OF GONADOTROPIN INHIBITORY HORMONE AND GONADOTROPIN RELEASING HORMONE NEURONS IN THE PREOPTIC AREA OF HYPOTHALAMUS IN THE PHASES OF ESTROUS CYCLE OF THE EWE

Author(s)

JAFARZADEH SHIRAZI M.R. | NAMAVAR M.R. | TAMADON A. | Issue Writer Certificate

Keywords

GONADOTROPIN INHIBITORY HORMONEQ2

GONADOTROPIN RELEASING HORMONEQ2

PREOPTIC AREAQ2

ESTROUS CYCLEQ2

EWEQ2

Abstract

Purpose: The aim of the present study was to evaluate the colocalization of GnIH and GnRH neurons in the EWE PREOPTIC AREA (POA) of hypothalamus during the phases of ESTROUS CYCLE.Materials and Methods: Three EWEs in three phases of proestrus, estrus and luteal of ESTROUS CYCLE (n=9) were selected and based on their ESTROUS CYCLE phase, the number of GnIH and GnRH neurons and percent of these two neuropeptides colocalization in POA were estimated by using immunohistochemistry method.Results: GnIH and GnRH neurons were present in the POA during the different phases of EWE ESTROUS CYCLE and their colocalization was observed. The number of GnIH neurons in luteal phase was substantially more than proestrus and estrus phases (P<0.01). However, there was no significant difference between the numbers of GnRH neurons of the POA in three estrous phases (P>0.05). In the luteal phase, percent of GnRH neurons that coexpress GnIH were significantly less than proestrus and estrus phases (P=0.008).Conclusion: GnIH expression in neurons of POA of EWE in luteal phase is more than follicular phase, but there was no significant difference in expression of GnRH neurons in the POA during the estrous phases. Also during all phases of the ESTROUS CYCLE, GnRH neurons coexpress GnIH and GnIH neurons coexpress GnRH. These findings showed the direct effect of GnIH neurons on GnRH neurons in POA and indirect control of LH secretion.

Cites

THE ROLE OF ARGININE-PHENYLALANINE-AMIDE-RELATED PEPTIDES IN MAMMALIAN REPRODUCTION

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APA: Copy

JAFARZADEH SHIRAZI, M.R., NAMAVAR, M.R., & TAMADON, A.. (2011). COEXPRESSION OF GONADOTROPIN INHIBITORY HORMONE AND GONADOTROPIN RELEASING HORMONE NEURONS IN THE PREOPTIC AREA OF HYPOTHALAMUS IN THE PHASES OF ESTROUS CYCLE OF THE EWE. JOURNAL OF IRANIAN ANATOMICAL SCIENCES, 9(34), 64-70. SID. https://sid.ir/paper/81393/en

Vancouver: Copy

JAFARZADEH SHIRAZI M.R., NAMAVAR M.R., TAMADON A.. COEXPRESSION OF GONADOTROPIN INHIBITORY HORMONE AND GONADOTROPIN RELEASING HORMONE NEURONS IN THE PREOPTIC AREA OF HYPOTHALAMUS IN THE PHASES OF ESTROUS CYCLE OF THE EWE. JOURNAL OF IRANIAN ANATOMICAL SCIENCES[Internet]. 2011;9(34):64-70. Available from: https://sid.ir/paper/81393/en

IEEE: Copy

M.R. JAFARZADEH SHIRAZI, M.R. NAMAVAR, and A. TAMADON, “COEXPRESSION OF GONADOTROPIN INHIBITORY HORMONE AND GONADOTROPIN RELEASING HORMONE NEURONS IN THE PREOPTIC AREA OF HYPOTHALAMUS IN THE PHASES OF ESTROUS CYCLE OF THE EWE,” JOURNAL OF IRANIAN ANATOMICAL SCIENCES, vol. 9, no. 34, pp. 64–70, 2011, [Online]. Available: https://sid.ir/paper/81393/en

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