Background: Comparison of the effect of lactation on expression of RFRP-3 mRNA in dorsomedial hypothalamic nucleus (DMH) and KiSS-1 mRNA in arcuate nucleus (ARC) of hypothalamus in lactating and nonlactating rat Materials and Methods: Fourteen rats of the Sprague- Dawley strain were randomly allotted into three groups. The non-lactating rats (n=5) were separated from their pups immediately upon...

Reproduction is essential for perpetuation of the species and, hence, is controlled by a sophisticated network of regulatory factors of central and peripheral origin that integrate at the hypothalamic-pituitary-gonadal (HPG) axis. Among the central regulators of reproduction, kisspeptins, as major stimulatory drivers of gonadotropin-releasing hormone (GnRH) neurosecretion, have drawn considerab...

The acid sensing ion channels (ASICs) form cation channels that are transiently activated by extracellular protons. They are expressed in dorsal root ganglia (DRG) neurons and in the periphery where they play a function in nociception and mechanosensation. Previous studies showed that FMRFamide and related peptides potentiate H +-gated currents. To better understand this potentiation, we examin...

The up-regulator regulation and down-regulator regulation of gonadotropin-releasing hormone (GnRH) in central precocious puberty is not yet known. However, recent advances in neuroendocrinology have shown the controlling role of arginine-phenylalanine (RF)-amide-related peptides (RFRPs) on GnRH secretion in different phenomenon of reproduction such as estrus cycle and pregnancy, but the exact r...

Background Chronic stress induces male reproductive dysfunction; however, the involved mechanisms are not clear. It has been suggested that the gonadotrophin-inhibitory hormone, known as RF-amide related peptide (RFRP) in mammalian species, may mediate this inhibitory effect of stress. The objective of the present study was to compare the effect of chronic stress and glucocorticoids receptor an...

Animals living in temperate zones anticipate seasonal environmental changes to adapt their biological functions, especially reproduction and metabolism. Two main physiological mechanisms have evolved for this adaptation: intrinsic long-term timing mechanisms with an oscillating period of approximately 1 year, driven by a circannual clock [1], and synchronization of biological rhythms to the sid...

*Corresponding Author: Dr. Sumit Sethi, Ph.D. Interdisciplinary Laboratory for Clinical Neuroscience (LiNC), Department of Psychiatry, Universidade Federal de São Paulo UNIFESP, Building Research II, São Paulo, SPBrazil. 4022 PHYSIOLOGICAL EVIDENCE OF AN INVERSE CORRELATION BETWEEN THE GONADAL FUNCTION AND RFRP-3 NEURONS IN MICE Sumit Sethi* and Chandra Mohini Chaturvedi Interdisciplinary Labor...

The Neuropeptide FF receptor family contains two subtypes, NPFF1 and NPFF2 (provisional nomenclature [12]), which exhibit high affinities for neuropeptide (NPFF, O15130) RFamide related peptides (RFRP: precursor gene symbol NPVF, Q9HCQ7). is broadly distributed in the central nervous system with highest levels found limbic hypothalamus. present density superficial layers of mammalian spinal cor...