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Infralimbic

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https://www.readbyqxmd.com/read/28924693/phosphodiesterase-4-inhibition-affects-both-the-direct-and-indirect-pathway-an-electrophysiological-study-examining-the-tri-phasic-response-in-the-substantia-nigra-pars-reticulata
#1
P R A Heckman, J V Schweimer, T Sharp, J Prickaerts, A Blokland
Fronto-striatal circuits constitute the neurobiological basis of many neuropsychiatric disorders. Part of the intracellular signaling within these circuits, including its dopaminergic modulation, is regulated by the cyclic adenosine monophosphate (cAMP)/protein kinase A (PKA) signaling cascade. Based on the overall expression in human fronto-striatal circuitry, we tested the effects of a cAMP selective phosphodiesterase 4 (PDE4) inhibitor on the tri-phasic response in the dorsomedial substantia nigra pars reticulata (SNr) upon stimulation of the infralimbic cortex in rats...
September 18, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28893650/adversity-in-early-adolescence-promotes-an-enduring-anxious-phenotype-and-increases-serotonergic-innervation-of-the-infralimbic-medial-prefrontal-cortex
#2
Cindy S Tao, Prateek Dhamija, Linda Booij, Janet L Menard
Stress during early development produces lasting effects on psychopathological outcomes. We analyzed the impact of prior intermittent, physical stress (IPS) during early adolescence (PD 22-33) on anxiety-like behaviour of female rats in adulthood. After behavioural testing, we used immunohistochemistry for the 5-HT transporter (SERT) to evaluate 5-HT innervation profiles in the medial prefrontal cortex (mPFC) and ventral hippocampus (VH). Administration of IPS (i.e., water immersion, elevated platform, foot shock) in early adolescence increased rats' anxiety-like behaviour in the elevated plus-maze but had no effects in the shock-probe burying test...
September 8, 2017: Neuroscience
https://www.readbyqxmd.com/read/28891509/role-of-the-medullary-lateral-tegmental-field-in-sympathetic-control
#3
Michael George Zaki Ghali
The sympathetic nervous system maintains and regulates arterial pressure and tissue perfusion, via control of cardiac output and vasomotor tone. Sympatho-vascular-mediated increases in blood pressure are effected by arterioloconstriction, which causes an increase in afterload, and/or venoconstriction, which increases venous return, left ventricular preload, and consequently, the force of cardiac contraction via Frank-Starling mechanisms; withdrawal of sympathetic drive elicits reciprocal effects. Spinalization reduces mammalian arterial pressure to 40-50 mm Hg consequent to the elimination of descending medullary pre-sympathetic bulbospinal drive to preganglionic sympathetic fibers in the intermediolateral cell column of the spinal cord...
2017: Journal of Integrative Neuroscience
https://www.readbyqxmd.com/read/28890149/distinct-roles-for-the-deacetylase-domain-of-hdac3-in-the-hippocampus-and-medial-prefrontal-cortex-in-the-formation-and-extinction-of-memory
#4
Yasaman Alaghband, Janine L Kwapis, Alberto J López, André O White, Osasumwen V Aimiuwu, Amni Al-Kachak, Kasuni K Bodinayake, Nicole C Oparaugo, Richard Dang, Mariam Astarabadi, Dina P Matheos, Marcelo A Wood
Histone deacetylases (HDACs) are chromatin modifying enzymes that have been implicated as powerful negative regulators of memory processes. HDAC3 has been shown to play a pivotal role in long-term memory for object location as well as the extinction of cocaine-associated memory, but it is unclear whether this function depends on the deacetylase domain of HDAC3. Here, we tested whether the deacetylase domain of HDAC3 has a role in object location memory formation as well as the formation and extinction of cocaine-associated memories...
September 7, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/28862251/prefrontal-cortex-deep-brain-stimulation-improves-fear-and-anxiety-like-behaviour-and-reduces-basolateral-amygdala-activity-in-a-preclinical-model-of-post-traumatic-stress-disorder
#5
Roman Reznikov, Francis Bambico, Mustansir Diwan, Roger J Raymond, Mina G Nashed, José N Nobrega, Clement Hamani
Deep brain stimulation (DBS) is being investigated for a number of psychiatric indications, including post-traumatic stress disorder (PTSD). Preclinical studies continue to be a cornerstone for the development of new DBS applications. We investigate whether DBS delivered to the infralimbic cortex (IL), a region involved in mechanisms of stress resiliency, may counter behavioural abnormalities in rats that present persistent extinction deficits and long-term anxiety after exposure to fear conditioning. Rats undergoing fear conditioning/extinction were segregated into weak- and strong-extinction groups (WE >70% or SE <30% of freezing during extinction)...
September 1, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28852400/long-term-acupuncture-treatment-has-a-multi-targeting-regulation-on-multiple-brain-regions-in-rats-with-alzheimer-s-disease-a-positron-emission-tomography-study
#6
Yang-Jia Lu, Xiao-Wen Cai, Gui-Feng Zhang, Yong Huang, Chun-Zhi Tang, Bao-Ci Shan, Shao-Yang Cui, Jun-Qi Chen, Shan-Shan Qu, Zheng Zhong, Xin-Sheng Lai, Genevieve Zara Steiner
The acute effect of acupuncture on Alzheimer's disease, i.e., on brain activation during treatment, has been reported. However, the effect of long-term acupuncture on brain activation in Alzheimer's disease is unclear. Therefore, in this study, we performed long-term needling at Zusanli (ST36) or a sham point (1.5 mm lateral to ST36) in a rat Alzheimer's disease model, for 30 minutes, once per day, for 30 days. The rats underwent (18)F-fluorodeoxyglucose positron emission tomography scanning. Positron emission tomography images were processed with SPM2...
July 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/28851668/spaced-sessions-of-avoidance-extinction-reduce-spontaneous-recovery-and-promote-infralimbic-cortex-activation
#7
Carles Tapias-Espinosa, Elisabet Kádár, Pilar Segura-Torres
Extinction-based therapies (EBT) are the psychological treatments of choice for certain anxiety disorders, such as post-traumatic stress disorder. However, some patients relapse and suffer spontaneous recovery (SR) of anxiety symptoms and persistence of avoidance behaviour, which underlines the need for improving EBT. In rats, recent evidence has highlighted the relevance of the temporal distribution of extinction sessions in reducing SR of auditory fear conditioning, although it has seldom been studied in procedures involving proactive avoidance responses, such as two-way active avoidance conditioning (TWAA)...
August 26, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28842281/investigating-the-role-of-dopamine-receptor-and-parvalbumin-expressing-cells-in-extinction-of-conditioned-fear
#8
Heather B Madsen, Alexandre A Guerin, Jee Hyun Kim
The present study examined the pattern of activation of neurons that express dopamine receptors 1 and 2 (D1R and D2R), and parvalbumin (PV) in mice that underwent extinction of a fear memory. Adult male transgenic mice expressing D1R or D2R tagged with green fluorescent protein (GFP) were conditioned with 6 tone-shock pairings. The following day they were randomly divided into one of four experimental groups: extinction, retrieval, context or handled. Extinction groups were exposed to 45 tone presentations, retrieval groups were exposed to 5 tone presentations and the context groups were exposed to the chamber without any tones...
August 29, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/28798340/predictable-chronic-mild-stress-during-adolescence-promotes-fear-memory-extinction-in-adulthood
#9
Jia-Hui Deng, Wei Yan, Ying Han, Chen Chen, Shi-Qiu Meng, Cheng-Yu Sun, Ling-Zhi Xu, Yan-Xue Xue, Xue-Jiao Gao, Na Chen, Fei-Long Zhang, Yu-Mei Wang, Jie Shi, Lin Lu
Early-life stress in adolescence has a long-lasting influence on brain function in adulthood, and it is mostly recognized as a predisposing factor for mental illnesses, such as anxiety and posttraumatic stress disorder. Previous studies also indicated that adolescent predictable chronic mild stress (PCMS) in early life promotes resilience to depression- and anxiety-like behaviors in adulthood. However, the role of PCMS in associated memory process is still unclear. In the present study, we found that adolescent PCMS facilitated extinction and inhibited fear response in reinstatement and spontaneous recovery tests in adult rats, and this effect was still present 1 week later...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28765070/prefrontal-connections-of-the-perirhinal-and-postrhinal-cortices-in-the-rat
#10
Eunkyu Hwang, Bailey S Willis, Rebecca D Burwell
Knowing how prefrontal regions interact with medial temporal lobe structures is important for understanding memory and cognition. Using anterograde and retrograde tract tracing methods in the rat, we report a detailed study of the perirhinal (PER) and postrhinal (POR) connections with the lateral, ventrolateral, and medial orbitofrontal cortices (ORBl, ORBvl, ORBm), infralimbic and prelimbic cortices (IL, PL), ventral and dorsal anterior cingulate cortices (ACAv, ACAd), and secondary motor cortex (MOs). Our analyses included the topography and laminar patterns of these connections...
July 29, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28753742/stress-facilitates-the-development-of-cognitive-dysfunction-after-chronic-ethanol-exposure
#11
Ellen M Rodberg, Carolina R den Hartog, Rachel I Anderson, Howard C Becker, David E Moorman, Elena M Vazey
BACKGROUND: Chronic exposure to stress or alcohol can drive neuroadaptations that alter cognition. Alterations in cognition may contribute to alcohol use disorders by reducing cognitive control over drinking and maintenance of abstinence. Here we examined effects of combined ethanol (EtOH) and stress exposure on prefrontal cortex (PFC)-dependent cognition. METHODS: Adult male C57BL/6J mice were trained to drink EtOH (15%, v/v) on a 1 h/d 1-bottle schedule. Once stable, mice were exposed to cycles of chronic intermittent EtOH (CIE) or air-control vapor exposure (Air), followed by test cycles of 1 h/d EtOH drinking...
September 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28749471/pre-synaptic-trkb-in-basolateral-amygdala-neurons-mediates-bdnf-signaling-transmission-in-memory-extinction
#12
Yuan Li, Dongdong Wang, Yang Li, Hongxia Chu, Lining Zhang, Ming Hou, Xingyu Jiang, Zheyu Chen, Bo Su, Tao Sun
Brain-derived neurotrophic factor (BDNF) and its high affinity receptor, TrkB, play an essential role in memory extinction. Our previous work has shown that JIP3 (JNK interacted protein 3) mediates anterograde axonal transport of TrkB through the direct binding of its coiled-coil domain 1 (CC1) with TrkB. Here, we constructed a fluorescent CC1 and enhanced green fluorescent protein (EGFP) fused protein, CC1-EGFP, and found that CC1-EGFP could specifically interrupt TrkB anterograde axonal transport and its localization at the pre-synaptic site...
July 27, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28736518/behavioral-effects-of-systemic-infralimbic-and-prelimbic-injections-of-a-serotonin-5-ht2a-antagonist-in-carioca-high-and-low-conditioned-freezing-rats
#13
Laura A León, Vitor Castro-Gomes, Santiago Zárate-Guerrero, Karen Corredor, Antonio P Mello Cruz, Marcus L Brandão, Fernando P Cardenas, J Landeira-Fernandez
The role of serotonin (5-hydroxytryptamine [5-HT]) and 5-HT2A receptors in anxiety has been extensively studied, mostly without considering individual differences in trait anxiety. Our laboratory developed two lines of animals that are bred for high and low freezing responses to contextual cues that are previously associated with footshock (Carioca High-conditioned Freezing [CHF] and Carioca Low-conditioned Freezing [CLF]). The present study investigated whether ketanserin, a preferential 5-HT2A receptor blocker, exerts distinct anxiety-like profiles in these two lines of animals...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28728677/dynamically-timed-stimulation-of-corticolimbic-circuitry-activates-a-stress-compensatory-pathway
#14
David Carlson, Lisa K David, Neil M Gallagher, Mai-Anh T Vu, Matthew Shirley, Rainbo Hultman, Joyce Wang, Caley Burrus, Colleen A McClung, Sunil Kumar, Lawrence Carin, Stephen D Mague, Kafui Dzirasa
BACKGROUND: The prefrontal cortex plays a critical role in regulating emotional behaviors, and dysfunction of prefrontal cortex-dependent networks has been broadly implicated in mediating stress-induced behavioral disorders including major depressive disorder. METHODS: Here we acquired multicircuit in vivo activity from eight cortical and limbic brain regions as mice were subjected to the tail suspension test (TST) and an open field test. We used a linear decoder to determine whether cellular responses across each of the cortical and limbic areas signal movement during the TST and open field test...
June 15, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/28720520/neural-systems-mediating-the-inhibition-of-cocaine-seeking-behaviors
#15
REVIEW
Victória A Muller Ewald, Ryan T LaLumiere
Over the past decades, research has targeted the neurobiology regulating cocaine-seeking behaviors, largely in the hopes of identifying potential targets for the treatment of cocaine addiction. Although much of this work has focused on those systems driving cocaine seeking, recently, studies examining the inhibition of cocaine-related behaviors have made significant progress in uncovering the neural systems that attenuate cocaine seeking. Such systems include the infralimbic cortex, nucleus accumbens shell, and hypothalamus...
July 15, 2017: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/28714715/the-development-of-perineuronal-nets-around-parvalbumin-gabaergic-neurons-in-the-medial-prefrontal-cortex-and-basolateral-amygdala-of-rats
#16
Kathryn D Baker, Arielle R Gray, Rick Richardson
Perineuronal nets (PNNs) are extracellular matrix structures that preferentially surround mature GABAergic neurons that express the calcium-binding protein parvalbumin (PV). It has been suggested that aberrant PNN formation in humans may contribute to psychological disorders, many of which emerge during childhood and adolescence. The present experiment investigated the normative developmental trajectory of PNN formation in the medial prefrontal cortex (mPFC) and basolateral amygdala (BLA) in juvenile (P24), adolescent (P35-36), and adult (∼P70) rats...
August 2017: Behavioral Neuroscience
https://www.readbyqxmd.com/read/28706238/freezing-response-independent-facilitation-of-fear-extinction-memory-in-the-prefrontal-cortex
#17
Jiso Hong, Daesoo Kim
The infralimbic cortex (IL) is known to facilitate the formation of extinction memory through reciprocal interactions with the amygdala, which produces fear responses such as freezing. Thus, whether presynaptic input from the amygdala and post-synaptic output of IL neurons are functionally dissociated in extinction memory formation remains unclear. Here, we demonstrated that photostimulation of IL inputs from BLA did not change freezing responses to conditioned stimuli (CS) during training, but did facilitate extinction memory, measured as a reduction in freezing responses to the CS 1 day later...
July 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28694754/using-curcumin-to-prevent-structural-and-behavioral-changes-of-medial-prefrontal-cortex-induced-by-sleep-deprivation-in-rats
#18
Ali Noorafshan, Fatemeh Karimi, Saied Karbalay-Doust, Ali Mohammad Kamali
Sleep Deprivation (SD) is known to result in a range of neurological consequences in chronically-afflicted subjects. Curcumin, a natural substance, has neuroprotective properties. This study aimed to evaluate the effects of curcumin on the medial Prefrontal Cortex (mPFC) of SD rats. Male rats were arbitrarily assigned to nine groups, including control, curcumin (100 mg/kg/day), olive oil, SD, SD+curcumin, SD+olive oil, grid, grid+curcumin, and grid+olive oil groups. SD was induced by a multiplatform box containing water...
2017: EXCLI journal
https://www.readbyqxmd.com/read/28691248/adolescent-alcohol-exposure-decreases-frontostriatal-resting-state-functional-connectivity-in-adulthood
#19
Margaret A Broadwater, Sung-Ho Lee, Yang Yu, Hongtu Zhu, Fulton T Crews, Donita L Robinson, Yen-Yu Ian Shih
Connectivity of the prefrontal cortex (PFC) matures through adolescence, coinciding with emergence of adult executive function and top-down inhibitory control over behavior. Alcohol exposure during this critical period of brain maturation may affect development of PFC and frontolimbic connectivity. Adult rats exposed to adolescent intermittent ethanol (AIE; 5 g/kg ethanol, 25 percent v/v in water, intragastrically, 2-day-on, 2-day-off, postnatal day 25-54) or water control underwent resting-state functional MRI to test the hypothesis that AIE induces persistent changes in frontolimbic functional connectivity under baseline and acute alcohol conditions (2 g/kg ethanol or saline, intraperitoneally administered during scanning)...
July 9, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28687229/the-phosphodiesterase-10a-selective-inhibitor-tak-063-induces-c-fos-expression-in-both-direct-and-indirect-pathway-medium-spiny-neurons-and-sub-regions-of-the-medial-prefrontal-cortex-in-rats
#20
Atsushi Nakatani, Sayuri Nakamura, Haruhide Kimura
TAK-063, a selective phosphodiesterase 10A (PDE10A) inhibitor, produces potent antipsychotic-like and pro-cognitive effects in rodents via balanced activation of striatal direct and indirect pathway medium spiny neurons (MSNs). Brain activity modulation by TAK-063 has been characterized using pharmacological magnetic resonance imaging and electroencephalography in animals, revealing modulation of activity in the prefrontal cortex (PFC) where there is little or no PDE10A expression. To understand the specific brain regions and cells affected by TAK-063 in rats, we assessed neural activation in the striatal complex and PFC using immunofluorescence staining to measure c-Fos expression...
July 4, 2017: Neuroscience Research
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