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https://www.readbyqxmd.com/read/26959827/estrogen-receptor-alpha-distribution-and-expression-in-the-social-neural-network-of-monogamous-and-polygynous-peromyscus
#1
Bruce S Cushing
In microtine and dwarf hamsters low levels of estrogen receptor alpha (ERα) in the bed nucleus of the stria terminalis (BST) and medial amygdala (MeA) play a critical role in the expression of social monogamy in males, which is characterized by high levels of affiliation and low levels of aggression. In contrast, monogamous Peromyscus males display high levels of aggression and affiliative behavior with high levels of testosterone and aromatase activity. Suggesting the hypothesis that in Peromyscus ERα expression will be positively correlated with high levels of male prosocial behavior and aggression...
2016: PloS One
https://www.readbyqxmd.com/read/24212674/independent-hypothalamic-circuits-for-social-and-predator-fear
#2
Bianca A Silva, Camilla Mattucci, Piotr Krzywkowski, Emanuele Murana, Anna Illarionova, Valery Grinevich, Newton S Canteras, Davide Ragozzino, Cornelius T Gross
The neural circuits mediating fear to naturalistic threats are poorly understood. We found that functionally independent populations of neurons in the ventromedial hypothalamus (VMH), a region that has been implicated in feeding, sex and aggression, are essential for predator and social fear in mice. Our results establish a critical role for VMH in fear and have implications for selective intervention in pathological fear in humans.
December 2013: Nature Neuroscience
https://www.readbyqxmd.com/read/20653036/seasonal-changes-in-aromatase-and-androgen-receptor-but-not-estrogen-receptor-mrna-expression-in-the-brain-of-the-free-living-male-song-sparrow-melospiza-melodia-morphna
#3
Douglas W Wacker, John C Wingfield, Jason E Davis, Simone L Meddle
Free-living male song sparrows experience three annually repeating life history stages associated with differential expression of sex steroid-dependent reproductive and aggressive behavior. In the breeding stage, they display reproductive and aggressive behavior and have elevated circulating testosterone levels. During molt, males show little or no aggression and no reproductive behavior, and have basal levels of circulating testosterone. In the non-breeding stage, they display high levels of aggression and no reproductive behavior, and have basal levels of circulating testosterone...
September 15, 2010: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/19707539/litter-environment-affects-behavior-and-brain-metabolic-activity-of-adult-knockout-mice
#4
David Crews, David Rushworth, Francisco Gonzalez-Lima, Sonoko Ogawa
In mammals, the formative environment for social and anxiety-related behaviors is the family unit; in the case of rodents, this is the litter and the mother-young bond. A deciding factor in this environment is the sex ratio of the litter and, in the case of mice lacking functional copies of gene(s), the ratio of the various genotypes in the litter. Both Sex and Genotype ratios of the litter affect the nature and quality of the individual's behavior later in adulthood, as well as metabolic activity in brain nuclei that underlie these behaviors...
2009: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/18508098/effects-of-neonatal-oxytocin-treatment-on-aggression-and-neural-activities-in-mandarin-voles
#5
R Jia, F D Tai, S C An, H Broders, X L Ding, Q Kong, L Zhao, H Zhang
Neonatal manipulation of oxytocin (OT) has long-term effects on behavior and physiology. Here we test the hypothesis that neonatal OT treatment can affect the subsequent expression of intrasexual aggression partly by reprogramming the neural activities of relevant brain regions. To test this hypothesis, mandarin voles (Lasiopodomys mandarinus) received OT or isotonic saline treatment within 24 h of birth. At about 75 days of age, aggressive behaviors and Fos expression in different brain regions were tested...
September 3, 2008: Physiology & Behavior
https://www.readbyqxmd.com/read/18160634/selective-deletion-of-bdnf-in-the-ventromedial-and-dorsomedial-hypothalamus-of-adult-mice-results-in-hyperphagic-behavior-and-obesity
#6
Thaddeus J Unger, German A Calderon, Leila C Bradley, Miguel Sena-Esteves, Maribel Rios
Brain-derived neurotrophic factor (BDNF) and its receptor TrkB are expressed in several hypothalamic and hindbrain nuclei involved in regulating energy homeostasis, developmentally and in the adult animal. Their depletion during the fetal or early postnatal periods when developmental processes are still ongoing elicits hyperphagic behavior and obesity in mice. Whether BDNF is a chief element in appetite control in the mature brain remains controversial. The required sources of this neurotrophin are also unknown...
December 26, 2007: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/17011561/ventromedial-hypothalamic-nucleus-lesions-disrupt-olfactory-mate-recognition-and-receptivity-in-female-ferrets
#7
Daniel W Robarts, Michael J Baum
Previous research showed that ferrets of both sexes rely on the perception of conspecifics' body odors to identify and motivate approach towards opposite-sex mating partners, and exposure to male body odors stimulated Fos expression in an olfactory projection circuit of female, but not male, ferrets that terminates in the ventromedial hypothalamic nucleus (VMH). We asked whether the female-typical preference of ferrets to approach male as opposed to female body odors in Y-maze tests would be disrupted by VMH lesions...
January 2007: Hormones and Behavior
https://www.readbyqxmd.com/read/16442108/steroid-hormone-mediation-of-limbic-brain-plasticity-and-aggression-in-free-living-tree-lizards-urosaurus-ornatus
#8
David Kabelik, Stacey L Weiss, Michael C Moore
The neural mechanisms by which steroid hormones regulate aggression are unclear. Although testosterone and its metabolites are involved in both the regulation of aggression and the maintenance of neural morphology, it is unknown whether these changes are functionally related. We addressed the hypothesis that parallel changes in steroid levels and brain volumes are involved in the regulation of adult aggression. We examined the relationships between seasonal hormone changes, aggressive behavior, and the volumes of limbic brain regions in free-living male and female tree lizards (Urosaurus ornatus)...
May 2006: Hormones and Behavior
https://www.readbyqxmd.com/read/11198048/evidence-that-long-lasting-potentiation-in-limbic-circuits-mediating-defensive-behaviour-in-the-right-hemisphere-underlies-pharmacological-stressor-fg-7142-induced-lasting-increases-in-anxiety-like-behaviour-role-of-benzodiazepine-receptors
#9
R E Adamec
The hypothesis that benzodiazepine receptors mediate initiation of lasting behavioural changes induced by FG-7142 was supported in this study. Behavioural changes normally induced by FG-7142 were blocked by prior administration of the competitive benzodiazepine receptor blocker, Flumazenil. When cats were subsequently given FG-7142 alone, the drug produced lasting behavioural changes in species characteristic defensive responses to rodent and cat vocal threat. FG-7142 also induced long-lasting potentiation (LLP) of evoked potentials in a number of efferent pathways from the amygdala in both hemispheres...
2000: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/10974353/neuroplasticity-in-specific-limbic-system-circuits-may-mediate-specific-kindling-induced-changes-in-animal-affect-implications-for-understanding-anxiety-associated-with-epilepsy
#10
R Adamec, B Young
In two complementary experiments, we studied the effects of low frequency stimulation (LFS) of the amygdala on behavioral effects of kindling in rats and cats. These studies tested the hypothesis that kindling induced long term potentiation (KLTP) in amygdala circuits underlies interictal behavioral change. Since LFS can depotentiate LTP, it was predicted that LFS should both depotentiate KLTP and reverse behavioral effects of kindling. In cats, the effects of LFS on KLTP of amygdala efferents was studied, and related to behavioral effects...
September 2000: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/9694023/evidence-that-nmda-dependent-limbic-neural-plasticity-in-the-right-hemisphere-mediates-pharmacological-stressor-fg-7142-induced-lasting-increases-in-anxiety-like-behavior-study-1-role-of-nmda-receptors-in-efferent-transmission-from-the-cat-amygdala
#11
R E Adamec
The anxiogenic beta-carboline, FG-7142, produces intense anxiety in humans and anxiety-like behavior in animals. FG-7142 also mimics the effects of exogenous stressors. In cats, FG-7142 lastingly changes defensive and aggressive behavior. Long-term potentiation (LTP) of neural transmission between limbic structures known to modulate feline defensive response to threat accompany behavioral changes. A series of three reports describes experiments designed to test the hypothesis that behavioral changes depend upon an N-methyl-D-aspartate (NMDA) receptor-based LTP of efferent transmission from the amygdala...
1998: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/8415948/partial-limbic-kindling-brain-behavior-and-the-benzodiazepine-receptor
#12
R E Adamec
Partial kindling (PK) of the left perforant path (PP) lastingly increased feline defensiveness. Perforant path PK produced long-term potentiation (LTP) in the amygdalo-ventromedial hypothalamic (AM-VMH) pathways in both hemispheres, and in the ventroamygdalofugal (VAF)-VMH efferents of the amygdala of the left hemisphere. Long-term potentiation paralleled behavioral changes. Perforant path PK did not affect recurrent inhibition in area CA3 of the ventral hippocampus. Long-term potentiation of CA3 EPSP and population spikes appeared, but before behavioral changes...
September 1993: Physiology & Behavior
https://www.readbyqxmd.com/read/7953751/aromatase-activity-in-the-preoptic-area-differs-between-aggressive-and-nonaggressive-male-house-mice
#13
COMPARATIVE STUDY
J C Compaan, A Wozniak, A J De Ruiter, J M Koolhaas, J B Hutchison
Treatment with testosterone (T) or estradiol (E2) facilitates intraspecific aggressive behavior in adult rodents. Brain aromatization of T to E2 appears to be involved in facilitation of fighting behavior. In the present study we measure the in vitro brain aromatase activity (AA) in the preoptic area (POA), amygdaloid nuclei (Am), ventromedial hypothalamus (VMH), and parietal cortex (CTX) from two strains of adult male house mice, which were genetically selected for territorial aggression, based upon their attack latencies (short attack latency: SAL; long attack latency: LAL)...
1994: Brain Research Bulletin
https://www.readbyqxmd.com/read/6310414/corticotropin-releasing-factor-is-a-potent-inhibitor-of-sexual-receptivity-in-the-female-rat
#14
D J Sirinathsinghji, L H Rees, J Rivier, W Vale
Corticotropin-releasing factor (CRF), the recently characterized and synthesized 41-amino acid polypeptide isolated from ovine hypothalami, has been shown to be a potent stimulator of adenohypophyseal beta-endorphin and corticotropin (ACTH) secretion both in vitro and in vivo. In common with other regulatory peptides, CRF has also been demonstrated to possess extra-hypophysiotropic roles. Indeed, intracerebroventricularly (i.c.v.) administered CRF elicits several endocrine and behavioural responses compatible with the concept that this peptide could be a key signal in coordinating the organism's endocrine and behavioural responses to stressful and other adaptive stimuli...
September 15, 1983: Nature
https://www.readbyqxmd.com/read/3780549/intracranial-sites-regulating-the-biphasic-action-of-progesterone-in-estrogen-primed-golden-hamsters
#15
L K Takahashi, R D Lisk
Diencephalic and mesencephalic neural sites regulating the biphasic effect of progesterone (P) were investigated using the hormone implantation technique in ovariectomized female golden hamsters primed with estrogen. Double barreled cannulae were implanted unilaterally and bilaterally in the medial preoptic area, anterior hypothalamus, ventromedial hypothalamus (VMH), central gray, or interpeduncular nucleus. Testing was conducted using a sequential paradigm; facilitation tests commenced after 44 h of estrogen priming...
December 1986: Endocrinology
https://www.readbyqxmd.com/read/3737710/effects-of-substantia-nigra-stimulation-on-hypothalamic-rage-reaction-in-cats
#16
G Crescimanno, P Piazza, A Benigno, G Amato
The effects of substantia nigra (SN) (pars compacta) stimulation on the rage reaction elicited by ventromedial hypothalamic nucleus (VMH) were investigated in the cat. The studied parameters of the rage reaction were: the current and the frequency threshold for the appearance of the hissing and the hissing latency. A facilitatory effect induced by the SN on the hypothalamic rage reaction was observed in the form of a decrease in the hypothalamic stimulus threshold for the hissing appearance and a decrease in the hissing latency...
1986: Physiology & Behavior
https://www.readbyqxmd.com/read/3719380/inhibitory-effects-of-acetylcholine-on-aggressive-defense-reaction-induced-by-electrical-stimulation-of-the-hypothalamus-in-cats
#17
R Kono, N Tashiro, H Nakao
The effects of ventral amygdalofugal pathways (VAF) or stria terminalis (ST) on the hypothalamic aggressive-defense (rage) reaction were examined in fifteen cats. After bilateral electrolytic lesions of the VAF or ST, 0.5 pmol of acetylcholine (ACh) was injected into the VMH and electrical stimulation was applied. The changes in the threshold for range reaction were compared in the non-lesioned, VAF-lesioned and ST-lesioned group. Both VAF-lesioned and non-lesioned cats showed a similar degree of significant elevation in the threshold for rage at 5 min after injection, while ST-lesioned group had no significant elevation...
April 1986: Brain Research Bulletin
https://www.readbyqxmd.com/read/2168568/hyper-running-activity-originating-from-the-hypothalamus-is-blocked-by-gaba
#18
T Yokawa, K Shiota, M Takahashi
Our previous study showed that injection of the hydrogel of a water-absorbent polymer (WAPGEL) into the ventromedial nucleus of the hypothalamus (VMH) induced stereotyped long-lasting running activity without association of any aggressive reactions, and suggested that swelling of the polymer at the site of injection affected the inhibitory neuron system, resulting in the expression of running activity. In the present study, we injected WAPGEL impregnated with different doses of GABA. By this treatment, the expression of running activity was inhibited in a dose-dependent manner...
June 1990: Physiology & Behavior
https://www.readbyqxmd.com/read/1648239/partial-kindling-of-the-ventral-hippocampus-identification-of-changes-in-limbic-physiology-which-accompany-changes-in-feline-aggression-and-defense
#19
R E Adamec
This study examined the interictal consequences of partial kindling of the ventral perforant path on attack and defensive behavior in the domestic cat. Partial kindling produced a lasting increase in defense response of cats to both rats and conspecific threat howls. In addition, there was a lasting suppression of approach-attack behaviors directed toward rats. The suppression of some components of approach-attack were shown to be independent of the increases in defensive response. The effects of partial kindling of the ventral perforant path on spread of seizure activity into the amygdala, and on the output of the amygdala to both the ventromedial hypothalamus (VMH) and bed nucleus of the stria terminalis (BNST) were also examined...
March 1991: Physiology & Behavior
https://www.readbyqxmd.com/read/1563726/intracranial-androgenic-and-estrogenic-stimulation-of-male-typical-behaviors-in-house-mice-mus-domesticus
#20
J Nyby, J A Matochik, R J Barfield
Two experiments in house mice (Mus domesticus) examined the neural sites at which steroid hormones activate the following male-typical behaviors: 70 kHz ultrasonic mating vocalizations in response to stimulus females or their urine, urinary marking in response to stimulus males or stimulus females, mounting of estrous females, and intermale aggression. In the first experiment, four groups of castrated males received bilateral intracranial implants of testosterone (T) into either the septum (SEPTUM), medial preoptic area (MPO), anterior hypothalamus (AHA), or ventromedial hypothalamus (VMH)...
March 1992: Hormones and Behavior
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