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Puslapis 1 nuo 18 rezultatus
Female lordosis behavior in estrogen-primed male rats treated with para-chlorophenylalanine or alpha-methyl-para-tyrosine.
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Effects of septal lesions and chronic estrogen treatment on dopamine, GABA and lordosis behavior in male rats.
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Septal lesions (SL) in female rats result in an increased sensitivity to the behavioral effects of acute estradiol benzoate (ACUTE-EB; 2 microgram/day X 3) treatment as measured by the lordosis quotient (LQ: number of lordotic responses X 100/number of mounts). Male rats, intact or castrated, do not
Lordosis facilitation by leptin in ovariectomized, estrogen-primed rats requires simultaneous or sequential activation of several protein kinase pathways.
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The present study tested the hypothesis that the Janus kinase 2, Src tyrosine kinases, and mitogen-activated protein kinase interact to regulate lordosis behavior induced by leptin in ovariectomized, estrogen-primed rats. The role of protein kinase A and protein kinase C in lordosis facilitation by
Influence of gamma-aminobutyric acid on lordosis behavior and dopamine activity in estrogen primed spayed female rats.
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In the first experiment the role of gamma-aminobutyric acid (GABA) in the display of lordosis behavior was examined in septal-lesioned and sham-operated ovariectomized rats. Following estradiol benzoate (EB) priming, septal-lesioned rats were tested for lordosis behavior before and after bilateral
[Sexual differentiation of social play and copulatory behavior in prenatally stressed male and female offspring of the rat: the influence of simultaneous treatment by tyrosine during exposure to prenatal stress].
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The environmental stress in the late gestational life has been reported to induce impairments of androgen-dependent sex differentiation of the rat brain. This study was performed to investigate the effects of prenatal stress on the features of gender role behavior and copulatory behavior which are
Interaction of oestradiol, alpha-melanotrophin and noradrenaline within the ventromedial nucleus in the control of female sexual behaviour.
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A possible inter-relationship between oestrogen, alpha-melanotrophin (alpha MSH) and NA in the ventromedial nucleus (VMN) has been studied in ovariectomised-adrenalectomised rats primed with a low dose of oestradiol benzoate (2 or 5 micrograms OB), which induces receptivity in approximately half the
Effects of the oxytocin fragment prolyl-leucyl-glycinamide on sexual behavior in the rat.
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Prolyl-leucyl-glycinamide (PLG), a natural brain peptide, is identical in structure to the C-terminal of oxytocin. Moreover, PLG and oxytocin can act as opiate antagonists. Evidence that opiates and oxytocin have significant influences on reproductive behavior suggests that PLG may also be
Selective enhancement of the lordotic component of female sexual behavior in rats following destruction of central catecholamine-containing systems.
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Ovariectomized female rats received two intraventricular injections of 200 microgram of 6-hydroxydopamine (6-OHDA), a treatment which produced 66% depletion of telencephalic norepinephrine and 53% depletion of telencephalic dopamine. Compared to vehicle-injected controls, 6-OHDA-treated animals
The effects of different amphetamines on copulatory behaviour and stereotype activity in the female rat, after treatment with monoamine depletors and synthesis inhibitors.
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The effects of treatment with alpha-methyl-p-tyrosine (alphaMPT), parachlorophenylalanine (pCPA) and reserpine in combination with D- or L-amphetamine on copulatory behaviour and stereotype activity was studied in estrogen + progesterone treated ovariectomized rats. In doses which clearly prevented
Revisiting the neural role of estrogen receptor beta in male sexual behavior by conditional mutagenesis.
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Estradiol derived from neural aromatization of gonadal testosterone plays a key role in the perinatal organization of the neural circuitry underlying male sexual behavior. The aim of this study was to investigate the contribution of neural estrogen receptor (ER) β in estradiol-induced effects
Epidermal growth factor activates reproductive behavior independent of ovarian steroids in female rodents.
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Sex steroids exert profound influence on neural development and function through activation of intranuclear receptors. However, during sexual differentiation and at onset of puberty, intracerebral estrogen (E) availability is subsequent to these effects. The potent mitogen epidermal growth factor
Clinical and genetic heterogeneity of hypochondroplasia.
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Hypochondroplasia (HCH) is an autosomal dominant condition characterised by short stature, micromelia, and lumbar lordosis. In a series of 29 HCH probands (13 sporadic cases, 16 familial cases), we tested their DNA for the N540K recurrent mutation previously described in the proximal tyrosine kinase
Effect of progesterone on monoamine turnover in the brain of the estrogen-primed rat.
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The effect of progesterone (P) on monoamine levels and turnover was evaluated in 8 brain nuclei in estrogen-primed rats. Animals were subcutaneously (SC) injected with P or vehicle 21 hours after SC treatment with 5 micrograms of estradiol benzoate (EB). EB-primed animals treated with P showed high
Male-like sexual behavior of female mouse lacking fucose mutarotase.
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BACKGROUND
Mutarotases are recently characterized family of enzymes that are involved in the anomeric conversions of monosaccharides. The mammalian fucose mutarotase (FucM) was reported in cultured cells to facilitate fucose utilization and incorporation into protein by glycosylation. However, the
Monoamines, estrogen and female sexual behavior in the golden hamster.
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In the golden hamster drugs which inhibit monoaminergic function (including p-chlorophenylalanine (PCPA), methysergide and a-methyl-p-tyrosine (a-MPT) facilitated lordosis in ovariectomized female hamsters as a function of the duration of estradiol benzoate (EB) priming. a-MPT (200 mg/kg),
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