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Central nucleus of the amygdala

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https://www.readbyqxmd.com/read/28439099/optogenetic-silencing-of-a-corticotropin-releasing-factor-pathway-from-the-central-amygdala-to-the-bed-nucleus-of-the-stria-terminalis-disrupts-sustained-fear
#1
A Asok, A Draper, A F Hoffman, J Schulkin, C R Lupica, J B Rosen
The lateral central nucleus of the amygdala (CeAL) and the dorsolateral bed nucleus of the stria terminalis (BNSTDL) coordinate the expression of shorter- and longer-lasting fears, respectively. Less is known about how these structures communicate with each other during fear acquisition. One pathway, from the CeAL to the BNSTDL, is thought to communicate via corticotropin-releasing factor (CRF), but studies have yet to examine its function in fear learning and memory. Thus, we developed an adeno-associated viral-based strategy to selectively target CRF neurons with the optogenetic silencer archaerhodopsin tp009 (CRF-ArchT) to examine the role of CeAL CRF neurons and projections to the BNSTDL during the acquisition of contextual fear...
April 25, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28435975/-effect-of-bilateral-injection-of-calcitonin-gene-related-peptide-into-amygdala-on-learning-and-memory-of-mice
#2
Xin Wu, Wan-Jun Zheng, Ming-Hui Lv, Jian-Feng Gao
The aim of the present study was to explore the effects of different doses of calcitonin gene-related peptide (CGRP) injected into the central nucleus of amygdala on cognitive function, learning and memory of mice. C57BL/6J mice (30 days old) were randomly divided into control, sham, and three CGRP groups (10 mice for each group). Three doses of CGRP (200, 400 and 800 ng) were bilaterally administered into the central nucleus of the amygdala. Open field test was used to assess cognitive function. Novel object recognition and Morris water maze test were used to evaluate learning and memory of the mice...
April 25, 2017: Sheng Li Xue Bao: [Acta Physiologica Sinica]
https://www.readbyqxmd.com/read/28423013/mapping-the-co-localization-of-the-circadian-proteins-per2-and-bmal1-with-enkephalin-and-substance-p-throughout-the-rodent-forebrain
#3
Ariana Frederick, Jory Goldsmith, Nuria de Zavalia, Shimon Amir
Despite rhythmic expression of clock genes being found throughout the central nervous system, very little is known about their function outside of the suprachiasmatic nucleus. Determining the pattern of clock gene expression across neuronal subpopulations is a key step in understanding their regulation and how they may influence the functions of various brain structures. Using immunofluorescence and confocal microscopy, we quantified the co-expression of the clock proteins BMAL1 and PER2 with two neuropeptides, Substance P (SubP) and Enkephalin (Enk), expressed in distinct neuronal populations throughout the forebrain...
2017: PloS One
https://www.readbyqxmd.com/read/28412582/sex-differences-in-neural-activation-following-different-routes-of-oxytocin-administration-in-awake-adult-rats
#4
Kelly M Dumais, Praveen P Kulkarni, Craig F Ferris, Alexa H Veenema
The neuropeptide oxytocin (OT) regulates social behavior in sex-specific ways across species. OT has promising effects on alleviating social deficits in sex-biased neuropsychiatric disorders. However little is known about potential sexually dimorphic effects of OT on brain function. Using the rat as a model organism, we determined whether OT administered centrally or peripherally induces sex differences in brain activation. Functional magnetic resonance imaging was used to examine blood oxygen level-dependent (BOLD) signal intensity changes in the brains of awake rats during the 20min following intracerebroventricular (ICV; 1μg/5μl) or intraperitoneal (IP; 0...
April 7, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28411274/posterior-orbitofrontal-and-anterior-cingulate-pathways-to-the-amygdala-target-inhibitory-and-excitatory-systems-with-opposite-functions
#5
Basilis Zikopoulos, Malin Hoistad, Yohan John, Helen Barbas
The bidirectional dialogue of the primate posterior orbitofrontal cortex (pOFC) with the amygdala is essential in cognitive-emotional functions. The pOFC also sends a uniquely one-way excitatory pathway to the amygdalar inhibitory intercalated masses (IM), which inhibit the medial part of the central amygdalar nucleus (CeM). Inhibition of IM has the opposite effect, allowing amygdalar activation of autonomic structures and emotional arousal. Using multiple labeling approaches to identify pathways and their postsynaptic sites in the amygdala in rhesus monkeys we found that the anterior cingulate cortex (ACC) innervated mostly the basolateral and CeM amygdalar nuclei, poised to activate CeM for autonomic arousal...
April 14, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28403933/knocking-down-amygdalar-ptp1b-in-diet-induced-obese-rats-improves-insulin-signaling-action-decreases-adiposity-and-may-alter-anxiety-behavior
#6
Natalia Ferreira Mendes, Gisele Castro, Dioze Guadagnini, Natalia Tobar, Susana Quiros Cognuck, Lucila Leico Kagohara Elias, Patricia Aline Boer, Patricia Oliveira Prada
OBJECTIVE: Protein tyrosine phosphatase 1B (PTP1B) has been extensively implicated in the regulation of body weight, food intake, and energy expenditure. The role of PTP1B appears to be cell and brain region dependent. RESULTS: Herein, we demonstrated that chronic high-fat feeding enhanced PTP1B expression in the central nucleus of the amygdala (CeA) of rats compared to rats on chow. Knocking down PTP1B with oligonucleotide antisense (ASO) decreased its expression and was sufficient to improve the anorexigenic effect of insulin through IR/Akt signaling in the CeA...
May 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28392491/intrinsic-functional-connectivity-of-the-central-nucleus-of-the-amygdala-and-bed-nucleus-of-the-stria-terminalis
#7
Adam X Gorka, Salvatore Torrisi, Alexander J Shackman, Christian Grillon, Monique Ernst
The central nucleus of the amygdala (CeA) and bed nucleus of the stria terminalis (BNST), two nuclei within the central extended amygdala, function as critical relays within the distributed neural networks that coordinate sensory, emotional, and cognitive responses to threat. These structures have overlapping anatomical projections to downstream targets that initiate defensive responses. Despite these commonalities, researchers have also proposed a functional dissociation between the CeA and BNST, with the CeA promoting responses to discrete stimuli and the BNST promoting responses to diffuse threat...
April 6, 2017: NeuroImage
https://www.readbyqxmd.com/read/28376659/kappa-opioid-receptor-antagonists-a-possible-new-class-of-therapeutics-for-migraine-prevention
#8
Jennifer Y Xie, Milena De Felice, Caroline M Kopruszinski, Nathan Eyde, Justin LaVigne, Bethany Remeniuk, Pablo Hernandez, Xu Yue, Naomi Goshima, Michael Ossipov, Tamara King, John M Streicher, Edita Navratilova, David Dodick, Hugh Rosen, Ed Roberts, Frank Porreca
Background Stress is the most commonly reported migraine trigger. Dynorphin, an endogenous opioid peptide acting preferentially at kappa opioid receptors (KORs), is a key mediator of stress responses. The aim of this study was to use an injury-free rat model of functional cephalic pain with features of migraine and medication overuse headache (MOH) to test the possible preventive benefit of KOR blockade on stress-induced cephalic pain. Methods Following sumatriptan priming to model MOH, rats were hyper-responsive to environmental stress, demonstrating delayed cephalic and extracephalic allodynia and increased levels of CGRP in the jugular blood, consistent with commonly observed clinical outcomes during migraine...
January 1, 2017: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/28363981/alcohol-dependence-disrupts-amygdalar-l-type-voltage-gated-calcium-channel-mechanisms
#9
Florence P Varodayan, Giordano de Guglielmo, Marian L Logrip, Olivier George, Marisa Roberto
L-type voltage-gated calcium channels (LTCCs) are implicated in several psychiatric disorders that are co-morbid with alcoholism and involve amygdala dysfunction. Within the amygdala, the central nucleus (CeA) is critical in acute alcohol's reinforcing actions, and its dysregulation in human alcoholics drives their negative emotional state and motivation to drink. Here we investigated the specific role of CeA LTCCs in the effects of acute alcohol at the molecular, cellular physiology and behavioral levels, and their potential neuroadaptation in alcohol-dependent rats...
March 31, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28360430/sex-differences-in-the-influence-of-body-mass-index-on-anatomical-architecture-of-brain-networks
#10
A Gupta, E A Mayer, K Hamadani, R Bhatt, C Fling, M Alaverdyan, C Torgerson, C Ashe-McNalley, J D Van Horn, B Naliboff, K Tillisch, C P Sanmiguel, J S Labus
BACKGROUND/OBJECTIVES: The brain has a central role in regulating ingestive behavior in obesity. Analogous to addiction behaviors, an imbalance in the processing of rewarding and salient stimuli results in maladaptive eating behaviors that override homeostatic needs. We performed network analysis based on graph theory to examine the association between body mass index (BMI) and network measures of integrity, information flow and global communication (centrality) in reward, salience and sensorimotor regions and to identify sex-related differences in these parameters...
April 25, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28348447/fos-expression-in-the-olfactory-pathway-of-high-and-low-sexually-performing-rams-exposed-to-urine-from-estrous-or-ovariectomized-ewes
#11
A J Mirto, K J Austin, V A Uthlaut, C E Roselli, B M Alexander
Exposure to estrous ewe urine stimulates investigation and mounting activity in sexually active but not sexually inactive rams. It was hypothesized sexual indifference may result from an inability to detect olfactory cues or an interruption of the pathway from detection of the olfactory stimulus to the motor response. Sexually active (n=4) and inactive (n=3) rams were exposed to urine from estrous ewes. An additional group of sexually active rams (n=3) were exposed to urine from ovariectomized ewes. Rams were exsanguinated following 1 h of exposure to stimulus...
January 2017: Applied Animal Behaviour Science
https://www.readbyqxmd.com/read/28263454/neuroplasticity-of-supraspinal-structures-associated-with-pathological-pain
#12
Pere Boadas-Vaello, Judit Homs, Francisco Reina, Anna Carrera, Enrique Verdú
Peripheral nerve and spinal cord injuries, along with other painful syndromes such as fibromyalgia, diabetic neuropathy, chemotherapeutic neuropathy, trigeminal neuralgia, complex regional pain syndrome, and/or irritable bowel syndrome, cause several neuroplasticity changes in the nervous system along its entire axis affecting the different neuronal nuclei. This paper reviews these changes, focusing on the supraspinal structures that are involved in the modulation and processing of pain, including the periaqueductal gray matter, red nucleus, locus coeruleus, rostral ventromedial medulla, thalamus, hypothalamus, basal ganglia, cerebellum, habenula, primary and secondary somatosensory cortex, motor cortex, mammillary bodies, hippocampus, septum, amygdala, cingulated and prefrontal cortex...
March 6, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28261089/sex-and-age-differences-in-motion-sickness-in-rats-the-correlation-with-blood-hormone-responses-and-neuronal-activation-in-the-vestibular-and-autonomic-nuclei
#13
Wei Zhou, Junqin Wang, Leilei Pan, Ruirui Qi, Peng Liu, Jiluo Liu, Yiling Cai
Many studies have demonstrated sex and age differences in motion sickness, but the underlying physiological basis is still in controversy. In the present study, we tried to investigate the potential correlates of endocrine and/or neuronal activity with sex and age differences in rats with motion sickness. LiCl-induced nausea symptom was evaluated by conditioned gaping. Motion sickness was assessed by measurement of autonomic responses (i.e., conditioned gaping and defecation responses), motor impairments (i...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28258483/parasubthalamic-and-calbindin-nuclei-in-the-posterior-lateral-hypothalamus-are-the-major-hypothalamic-targets-for-projections-from-the-central-and-anterior-basomedial-nuclei-of-the-amygdala
#14
Marie Barbier, Sandrine Chometton, Yvan Peterschmitt, Dominique Fellmann, Pierre-Yves Risold
The parasubthalamic nucleus (PSTN) and the ventrally adjacent calbindin nucleus (CbN) form a nuclear complex in the posterior lateral hypothalamic area (LHA), recently characterized as connected with the central nucleus of the amygdala (CEA). The aim of the present work is to analyze in detail the projections from the amygdala into the PSTN/CbN, also focusing on pathways into the LHA. After fluorogold injections into the PSTN/CbN, the medial part of the CEA (CEAm) appears to be the main supplier of projections from the CEA...
March 3, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28255675/co-localization-of-the-cannabinoid-type-1-receptor-with-corticotropin-releasing-factor-containing-afferents-in-the-noradrenergic-nucleus-locus-coeruleus-implications-for-the-cognitive-limb-of-the-stress-response
#15
Ryan R Wyrofsky, Beverly A S Reyes, Elisabeth J Van Bockstaele
The noradrenergic system has been shown to play a key role in the regulation of stress responses, arousal, mood, and emotional states. Corticotropin-releasing factor (CRF) is a primary mediator of stress-induced activation of noradrenergic neurons in the nucleus locus coeruleus (LC). The endocannabinoid (eCB) system also plays a key role in modulating stress responses, acting as an "anti-stress" neuro-mediator. In the present study, we investigated the cellular sites for interactions between the cannabinoid receptor type 1 (CB1r) and CRF in the LC...
March 2, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28247455/on-the-relationships-in-rhesus-macaques-between-chronic-ethanol-consumption-and-the-brain-transcriptome
#16
Ovidiu D Iancu, Alexander Colville, Nicole A R Walter, Priscila Darakjian, Denesa L Oberbeck, James B Daunais, Christina L Zheng, Robert P Searles, Shannon K McWeeney, Kathleen A Grant, Robert Hitzemann
This is the first description of the relationship between chronic ethanol self-administration and the brain transcriptome in a non-human primate (rhesus macaque). Thirty-one male animals self-administered ethanol on a daily basis for over 12 months. Gene transcription was quantified with RNA-Seq in the central nucleus of the amygdala (CeA) and cortical Area 32. We constructed coexpression and cosplicing networks, and we identified areas of preservation and areas of differentiation between regions and network types...
February 28, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28240194/brain-and-gut-crf-signaling-biological-actions-and-role-in-the-gastrointestinal-tract
#17
Yvette Taché, Mulugeta Million, Muriel Larauche, Pu-Qing Yuan
Corticotropin-releasing factor (CRF) signaling pathways coordinate the behavioral, endocrine, autonomic and visceral responses to stress. Convergent anatomical, molecular, pharmacological and functional experimental evidence supports an important role of brain CRF receptor signaling in stress-related alterations of gastrointestinal functions. These include the inhibition of gastric acid secretion and gastro-small intestinal transit, the stimulation of colonic enteric nervous system and secretory-motor function, enhanced intestinal permeability, and visceral hypersensitivity...
February 23, 2017: Current Molecular Pharmacology
https://www.readbyqxmd.com/read/28236615/effects-of-music-therapy-on-endothelial-function-in-patients-with-coronary-artery-disease-participating-in-aerobic-exercise-therapy
#18
Marina Deljanin Ilic, Radmila F Pavlovic, Gordana Kocic, Dejan Simonovic, Gordana Lazarevic
Context • Pleasant music that evokes a positive emotional response may activate brain pathways of the insular cortex, central nucleus of the amygdala, and lateral hypothalamus, which are involved in the integration of emotional and ambient sensory input, with corresponding autonomic responses. Exercise training can improve endothelium-dependent vasodilatation, both in epicardial coronary vessels and in resistance vessels, for patients with coronary heart disease. Objective • The aim of the present study was to evaluate the effects on endothelial function when patients with stable coronary artery disease (CAD) listened to their favorite music...
February 27, 2017: Alternative Therapies in Health and Medicine
https://www.readbyqxmd.com/read/28235898/gabaergic-neurons-of-the-central-amygdala-promote-cataplexy
#19
Carrie E Mahoney, Lindsay J Agostinelli, Jessica N K Brooks, Bradford B Lowell, Thomas E Scammell
Narcolepsy is characterized by chronic sleepiness and cataplexy-sudden muscle paralysis triggered by strong, positive emotions. This condition is caused by a lack of orexin (hypocretin) signaling, but little is known about the neural mechanisms that mediate cataplexy. The amygdala regulates responses to rewarding stimuli and contains neurons active during cataplexy. In addition, lesions of the amygdala reduce cataplexy. Because GABAergic neurons of the central nucleus of the amygdala (CeA) target brainstem regions known to regulate muscle tone, we hypothesized that these cells promote emotion-triggered cataplexy...
April 12, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28230907/estrogenic-suppression-of-binge-like-eating-elicited-by-cyclic-food-restriction-and-frustrative-nonreward-stress-in-female-rats
#20
Maria Vittoria Micioni Di Bonaventura, Thomas A Lutz, Adele Romano, Mariangela Pucci, Nori Geary, Lori Asarian, Carlo Cifani
Because binge eating and emotional eating vary through the menstrual cycle in human females, we investigated cyclic changes in binge-like eating in female rats and their control by estrogens. Binge-like eating was elicited by three cycles of 4 days of food restriction and 4 days of free feeding followed by a single frustrative nonreward-stress episode (15 min visual and olfactory exposure to a familiar palatable food) immediately before presentation of the palatable food. Intact rats showed binge-like eating during the diestrous and proestrous phases of the ovarian cycle, but not during the estrous (periovulatory) phase...
February 23, 2017: International Journal of Eating Disorders
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