EFFECT OF LACTATION ON THE EXPRESSION OF GONADOTROPIN-INHIBITORY HORMONE IN DORSOMEDIAL AND PARAVENTRICULAR NUCLEI OF THE RAT HYPOTHALAMUS

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ADAVI HAMED; JAFARZADEH SHIRAZI MOHAMMAD REZA; ZAMIRI MOHAMMAD JAVAD; NAMAVAR MOHAMMAD REZA; TANIDEH NADER; TAMADON AMIN

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Journal: Physiology and Pharmacology Year:2011 | Volume:15 | Issue:2 Page(s): 165-172

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Title

EFFECT OF LACTATION ON THE EXPRESSION OF GONADOTROPIN-INHIBITORY HORMONE IN DORSOMEDIAL AND PARAVENTRICULAR NUCLEI OF THE RAT HYPOTHALAMUS

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Keywords

GONADOTROPIN INHIBITORY HORMONEQ2

LACTATIONQ3

DORSOMEDIAL NUCLEUSQ2

PARAVENTRICULAR NUCLEUSQ2

RATQ3

Abstract

Introduction: GONADOTROPIN INHIBITORY HORMONE (GnIH) is believed to be an inhibitor of gonadotropin releasing hormone (GnRH) secretion. The role of GnIH in LACTATIONal inhibition of gonadotropin secretion is not well known; therefore, the aim of the present study was to evaluate the effect of LACTATION on expression of GnIH in these nuclei of lactating and non-lactating RATs.Methods: Ten postpartum RATs of the Sprague-Dawley strain were randomly allotted into two groups. The number of pups was adjusted to five pups per suckling female, while the control non-lactating RATs were separated from their pups immediately upon parturition. The lactating RATs were allowed to suckle their pups for eight days. The number of GnIH neurons in the dorsomedial (DMH) and paraventricular (PVN) nuclei was estimated using an immunohistochemical method.Results: The number of GnIH neurons in DMH (P=0.005) and PVN (P=0.001) of lactating RATs were significantly higher than those of the non-lactating RATs. Moreover, fibers of GnIH neurons were observed in anteroventral periventricular nucleus (AVPV) in lactating RATs.Conclusion: LACTATION increased GnIH expression in DMH and PVN of the lactating RATs, and thus may have a role in inhibiting GnRH and subsequently LH secretion during the LACTATION period.

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APA: Copy

ADAVI, HAMED, JAFARZADEH SHIRAZI, MOHAMMAD REZA, ZAMIRI, MOHAMMAD JAVAD, NAMAVAR, MOHAMMAD REZA, TANIDEH, NADER, & TAMADON, AMIN. (2011). EFFECT OF LACTATION ON THE EXPRESSION OF GONADOTROPIN-INHIBITORY HORMONE IN DORSOMEDIAL AND PARAVENTRICULAR NUCLEI OF THE RAT HYPOTHALAMUS. PHYSIOLOGY AND PHARMACOLOGY, 15(2), 165-172. SID. https://sid.ir/paper/75304/en

Vancouver: Copy

ADAVI HAMED, JAFARZADEH SHIRAZI MOHAMMAD REZA, ZAMIRI MOHAMMAD JAVAD, NAMAVAR MOHAMMAD REZA, TANIDEH NADER, TAMADON AMIN. EFFECT OF LACTATION ON THE EXPRESSION OF GONADOTROPIN-INHIBITORY HORMONE IN DORSOMEDIAL AND PARAVENTRICULAR NUCLEI OF THE RAT HYPOTHALAMUS. PHYSIOLOGY AND PHARMACOLOGY[Internet]. 2011;15(2):165-172. Available from: https://sid.ir/paper/75304/en

IEEE: Copy

HAMED ADAVI, MOHAMMAD REZA JAFARZADEH SHIRAZI, MOHAMMAD JAVAD ZAMIRI, MOHAMMAD REZA NAMAVAR, NADER TANIDEH, and AMIN TAMADON, “EFFECT OF LACTATION ON THE EXPRESSION OF GONADOTROPIN-INHIBITORY HORMONE IN DORSOMEDIAL AND PARAVENTRICULAR NUCLEI OF THE RAT HYPOTHALAMUS,” PHYSIOLOGY AND PHARMACOLOGY, vol. 15, no. 2, pp. 165–172, 2011, [Online]. Available: https://sid.ir/paper/75304/en

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