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https://www.readbyqxmd.com/read/29332256/dopamine-dependent-social-information-processing-in-non-human-primates
#1
Young-A Lee, Sarah Lionnet, Akemi Kato, Yukiori Goto
RATIONALE: Dopamine (DA) is a neurotransmitter whose roles have been suggested in various aspects of brain functions. Recent studies in rodents have reported its roles in social function. However, how DA is involved in social information processing in primates has largely remained unclear. OBJECTIVES: We investigated prefrontal cortical (PFC) activities associated with social vs. nonsocial visual stimulus processing. METHODS: Near-infrared spectroscopy (NIRS) was applied to Japanese macaques, along with pharmacological manipulations of DA transmission, while they were gazing at social and nonsocial visual stimuli...
January 14, 2018: Psychopharmacology
https://www.readbyqxmd.com/read/29329984/infralimbic-dopamine-d2-receptors-mediate-glucocorticoid-induced-facilitation-of-auditory-fear-memory-extinction-in-rats
#2
Masoumeh Dadkhah, Payman Raise Abdullahi, Ali Rashidy-Pour, Hamid Reza Sameni, Abbas Ali Vafaei
The infralimbic (IL) cortex of the medial prefrontal cortex plays an important role in the extinction of fear memory. Also, it has been showed that both brain glucocorticoid and dopamine receptors are involved in many processes such as fear extinction that drive learning and memory; however, the interaction of these receptors in the IL cortex remains unclear. We examined a putative interaction between the effects of glucocorticoid and dopamine receptors stimulation in the IL cortex on fear memory extinction in an auditory fear conditioning paradigm in male rats...
January 9, 2018: Brain Research
https://www.readbyqxmd.com/read/29328502/hepatocellular-carcinoma-related-cyclin-d1-is-selectively-regulated-by-autophagy-degradation-system
#3
Shan-Ying Wu, Sheng-Hui Lan, Shang-Rung Wu, Yen-Chi Chiu, Xi-Zhang Lin, Ih-Jen Su, Ting-Fen Tsai, Chia-Jui Yen, Tsung-Hsueh Lu, Fu-Wen Liang, Chung-Yi Li, Huey-Jen Su, Chun-Li Su, Hsiao-Sheng Liu
Dysfunction of degradation machineries causes cancers, including hepatocellular carcinoma (HCC). Overexpression of cyclin D1 in HCC has been reported. We previously reported that autophagy preferentially recruits and degrades the oncogenic miR-224 to prevent HCC. Therefore, in the present study we attempted to clarify whether cyclin D1 is another oncogenic factor selectively regulated by autophagy in HCC tumorigenesis. Initially, we found an inverse correlation between low autophagic activity and high cyclin D1 expression in the tumors of 147 HCC patients and three murine models, and these results taken together revealed a correlation with poor overall survival of HCC patients, indicating the importance of these two events in HCC development...
January 12, 2018: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29324797/sex-dependent-impact-of-early-life-stress-and-adult-immobilization-in-the-attribution-of-incentive-salience-in-rats
#4
Silvia Fuentes, Javier Carrasco, Abigail Hatto, Juan Navarro, Antonio Armario, Manel Monsonet, Jordi Ortiz, Roser Nadal
Early life stress (ELS) induces long-term effects in later functioning and interacts with further exposure to other stressors in adulthood to shape our responsiveness to reward-related cues. The attribution of incentive salience to food-related cues may be modulated by previous and current exposures to stressors in a sex-dependent manner. We hypothesized from human data that exposure to a traumatic (severe) adult stressor will decrease the attribution of incentive salience to reward-associated cues, especially in females, because these effects are modulated by previous ELS...
2018: PloS One
https://www.readbyqxmd.com/read/29323792/the-retinamide-vnlg-152-inhibits-ar-ar-v7-and-mnk-eif4esignaling-pathways-to-suppress-emt-and-castration-resistant-prostate-cancer-xenograft-growth
#5
Vidya P Ramamurthy, Senthilmurugan Ramalingam, Lalji K Gediya, Vincent C O Njar
VNLG-152, a lead novel retinamide (NR) shown to suppress growth and progression in genetically diverse PCa cells via inhibition of AR signaling and eIF4E translational machinery. Herein, we report therapeutic effects of VNLG-152 on castration resistant prostate cancer (CRPC) growth and metastatic phenotype in CRPC tumor xenograft model. Administration of VNLG-152 significantly and dose-dependently suppressed the growth of aggressive CWR22Rv1 tumors by 63.4% and 76.3% respectively (P = 0.001), vs. vehicle with no host toxicity...
January 11, 2018: FEBS Journal
https://www.readbyqxmd.com/read/29321592/amyloid-%C3%AE-causes-excitation-inhibition-imbalance-through-dopamine-receptor-1-dependent-disruption-of-fast-spiking-gabaergic-input-in-anterior-cingulate-cortex
#6
Si-Qiang Ren, Wen Yao, Jing-Zhi Yan, Chunhui Jin, Jia-Jun Yin, Jianmin Yuan, Shui Yu, Zaohuo Cheng
Alzheimer's disease (AD) is the most common cause of dementia in the elderly. At the early stages of AD development, the soluble β-amyloid (Aβ) induces synaptic dysfunction, perturbs the excitation/inhibition balance of neural circuitries, and in turn alters the normal neural network activity leading to cognitive decline, but the underlying mechanisms are not well established. Here by using whole-cell recordings in acute mouse brain slices, we found that 50 nM Aβ induces hyperexcitability of excitatory pyramidal cells in the cingulate cortex, one of the most vulnerable areas in AD, via depressing inhibitory synaptic transmission...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29321393/-n-3-fatty-acids-and-the-maintenance-of-neuronal-functions
#7
Michio Hashimoto
The functions of n-3 fatty acids are known to be diverse, and they play roles in cardiovascular and neuronal systems and in lipid metabolism. Docosahexaenoic acid (DHA), which is the most abundant n-3 fatty acid in the brain, is essential for the maintenance of brain functions throughout the human lifespan. Epidemiological studies have demonstrated that reduced n-3 fatty acid intake is closely associated with the onset of mental and neurological diseases such as brain developmental disorders, depression, and Alzheimer's disease...
2018: Nihon Yakurigaku Zasshi. Folia Pharmacologica Japonica
https://www.readbyqxmd.com/read/29318708/cocaine-conditioned-place-preference-unexpected-suppression-of-preference-due-to-testing-combined-with-strong-conditioning
#8
Lucile Marion-Poll, Antoine Besnard, Sophie Longueville, Emmanuel Valjent, Olivia Engmann, Jocelyne Caboche, Denis Hervé, Jean-Antoine Girault
Conditioned place preference (CPP) is widely used for evaluating the rewarding effects of drugs. Like other memories, CPP is proposed to undergo reconsolidation during which it is unstable and sensitive to pharmacological inhibition. Previous studies have shown that cocaine CPP can be apparently erased by extracellular signal-regulated kinase (ERK) pathway inhibition during cocaine reconditioning (re-exposure to the drug-paired environment in the presence of the drug). Here, we show that blockade of D1 receptors during reconditioning prevented ERK activation and induced a loss of CPP...
January 10, 2018: Addiction Biology
https://www.readbyqxmd.com/read/29317777/a-kinase-anchoring-protein-150-akap150-promotes-cocaine-reinstatement-by-increasing-ampa-receptor-transmission-in-the-accumbens-shell
#9
Leonardo A Guercio, Mackenzie E Hofmann, Sarah E Swinford-Jackson, Julia S Sigman, Mathieu E Wimmer, Mark L Dell'Acqua, Heath D Schmidt, R Christopher Pierce
Previous work indicated that activation of D1-like dopamine receptors (D1DRs) in the nucleus accumbens shell promoted cocaine seeking through a process involving the activation of PKA and GluA1-containing AMPA receptors (AMPARs). A-kinase anchoring proteins (AKAPs) localize PKA to AMPARs leading to enhanced phosphorylation of GluA1. AKAP150, the most well-characterized isoform, plays an important role in several forms of neuronal plasticity. However, its involvement in drug addiction has been minimally explored...
December 12, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29313404/vitamin-d-diminishes-the-high-platelet-aggregation-of-type-2-diabetes-mellitus-patients
#10
Maya Sultan, Orit Twito, Tali Tohami, Erez Ramati, Eran Neumark, Gloria Rashid
Platelet activation is found in inflammatory conditions and implicated in the pathogenesis of chronic medical conditions, such as atherosclerosis, coronary vascular disease, cerebrovascular disease, and diabetes mellitus (DM). HbA1c is inversely related to vitamin D25 levels in individuals with and without DM. This study aimed to determine the relation between platelet aggregation, vitamin D and HbA1c among healthy individuals and those with Type 2 DM (T2DM). The direct effect of vitamin D1, 25 (calcitriol) on platelet aggregation was also investigated...
January 9, 2018: Platelets
https://www.readbyqxmd.com/read/29305860/rvd1-inhibits-tnf%C3%AE-induced-c-myc-expression-in-normal-intestinal-epithelial-cells-and-destabilizes-hyper-expressed-c-myc-in-colon-cancer-cells
#11
Xiancai Zhong, Ha-Na Lee, Young-Joon Surh
Inflammatory bowel diseases, including ulcerative colitis and Crohn's disease, are persistent disorders that lead to development of colitis-associated cancer (CAC). Seeking the resolution of colitis has been addressed as a new therapeutic strategy to CAC. Resolvin D1 (RvD1) is an endogenous lipid mediator that is generated from docosahexaenoic acid during the resolution of inflammation. Although the pro-resolving effects of RvDs have been extensively investigated and well defined, the role for RvD1 in CAC remains largely unknown...
January 3, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29305058/altered-gastrointestinal-motility-in-an-animal-model-of-lesch-nyhan-disease
#12
Maria G Zizzo, Monica Frinchi, Domenico Nuzzo, Hyder A Jinnah, Giuseppa Mudò, Daniele F Condorelli, Francesco Caciagli, Renata Ciccarelli, Patrizia Di Iorio, Flavia Mulè, Natale Belluardo, Rosa Serio
Mutations in the HGPRT1 gene, which encodes hypoxanthine-guanine phosphoribosyltransferase (HGprt), housekeeping enzyme responsible for recycling purines, lead to Lesch-Nyhan disease (LND). Clinical expression of LND indicates that HGprt deficiency has adverse effects on gastrointestinal motility. Therefore, we aimed to evaluate intestinal motility in HGprt knockout mice (HGprt¯). Spontaneous and neurally evoked mechanical activity was recorded in vitro as changes in isometric tension in circular muscle strips of distal colon...
December 20, 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29301581/activation-of-dopamine-d1-receptor-decreased-nlrp3-mediated-inflammation-in-intracerebral-hemorrhage-mice
#13
Tian Wang, Derek Nowrangi, Lingyan Yu, Tai Lu, Jiping Tang, Bing Han, Yuxin Ding, Fenghua Fu, John H Zhang
BACKGROUND: Inflammasomes are involved in diverse inflammatory diseases. Previous study reported that the neurotransmitter dopamine inhibited NLRP3 inflammasome activation via dopamine D1 receptor (DRD1). The present study aims to investigate the role of DRD1 on neuroinflammation in intracerebral hemorrhage (ICH) mice and the potential mechanism mediated by NLRP3 inhibition. METHODS: One hundred and six male CD-1 mice were subjected to intrastriatal injection of bacterial collagenase or PBS...
January 4, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29299155/neuroprotection-by-aripiprazole-against-%C3%AE-amyloid-induced-toxicity-by-p-ck2%C3%AE-activation-via-inhibition-of-gsk-3%C3%AE
#14
So Youn Park, Hwa Kyoung Shin, Won Suk Lee, Sun Sik Bae, Koanhoi Kim, Ki Whan Hong, Chi Dae Kim
Psychosis is reported over 30% of patients with Alzheimer's disease (AD) in clinics. Aripiprazole is an atypical antipsychotic drug with partial agonist activity at the D2 dopamine and 5-HT1A receptors with low side-effect profile. We identified aripiprazole is able to overcome the amyloid-β (Aβ)-evoked neurotoxicity and then increase the cell viability. This study elucidated the mechanism(s) by which aripiprazole ameliorates Aβ1-42-induced decreased neurite outgrowth and viability in neuronal cells. Pretreatment with aripiprazole increased Brain-derived neurotrophic factor (BDNF) mRNA and protein expressions in N2a cells...
December 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/29296214/ncoa5-promotes-proliferation-migration-and-invasion-of-colorectal-cancer-cells-via-activation-of-pi3k-akt-pathway
#15
Kailv Sun, Sheng Wang, Jun He, Yufeng Xie, Yang He, Zhenxin Wang, Lei Qin
The nuclear receptor coactivator 5 (NCOA5) displays both coactivator and corepressor functions. Previous studies showed that alteration of NCOA5 participates in carcinogenesis and progression. However, its roles in colorectal cancer (CRC) remain unknown. Herein, we demonstrated that expression of NCOA5 in human CRC tissues was notably higher than that in adjacent tissues, which significantly correlated with clinicopathological features such as length of tumor, regional lymph node staging and cancer staging...
December 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/29290921/gut-brain-crosstalk-regulates-craving-for-fatty-food
#16
REVIEW
Rajendra Raghow
Patients undergoing Roux-en-Y gastric bypass (RYGB) surgery elicit striking loss of body weight. Anatomical re-structuring of the gastrointestinal (GI) tract, leading to reduced caloric intake and changes in food preference, are thought to be the primary drivers of weight loss in bariatric surgery patients. However, the mechanisms by which RYGB surgery causes a reduced preference for fatty foods remain elusive. In a recent report, Hankir et al described how RYGB surgery modulated lipid nutrient signals in the intestine of rats to blunt their craving for fatty food...
December 15, 2017: World Journal of Diabetes
https://www.readbyqxmd.com/read/29289835/antinociceptive-anti-inflammatory-and-toxicological-evaluation-of-semi-synthetic-molecules-obtained-from-a-benzyl-isothiocyanate-isolated-from-moringa-oleifera-lam-in-a-temporomandibular-joint-inflammatory-hypernociception-model-in-rats
#17
Alain Oliveira Dos Santos, Danielle Rocha do Val, Felipe Dantas da Silveira, Francisco Isaac Fernandes Gomes, Hermany Capistrano Freitas, Ellen Lima de Assis, Diana Kelly Castro de Almeida, Igor Iuco Castro da Silva, Francisco Geraldo Barbosa, Jair Mafezoli, Marcos Reinaldo da Silva, Gerly Anne de Castro Brito, Juliana Trindade Clemente-Napimoga, Vicente de Paulo Teixeira de Paulo Teixera Pinto, Gerardo Cristino Filho, Mirna Marques Bezerra, Hellíada Vasconcelos Chaves
Inflammation is a key component of many clinical conditions that affect the temporomandibular joint (TMJ) and Moringa oleifera Lam. has been used to treat inflammatory diseases. Here, we evaluated the toxicological effects on mice of a naturally-occurring isothiocyanate from M. oleifera and its seven analogue molecules. Further, the anti-nociceptive and anti-inflammatory effects on a rat model of TMJ inflammatory hypernociception were assessed. The systemic toxicological profile was determined in mice over a 14-day period: MC-1 1 μg/kg; MC-D1 1 μg/kg, MC-D3 100 μg/kg, MC-D6 1 μg/kg, MC-D7 1 μg/kg, MC-D8 1 μg/kg, MC-D9 10 μg/kg, and MC-H 1 μg/kg...
December 28, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29289668/involvement-of-the-dopaminergic-system-in-the-antidepressant-like-effect-of-the-lectin-isolated-from-the-red-marine-alga-solieria-filiformis-in-mice
#18
Ticiana Monteiro Abreu, Valdécio Silvano Monteiro, Ana Beatriz Souza Martins, Felipe Barros Teles, Renata Line da Conceição Rivanor, Érika Freitas Mota, Danielle S Macedo, Silvânia Maria Mendes de Vasconcelos, José Eduardo Ribeiro Honório Júnior, Norma Maria Barros Benevides
This study aimed at evaluating the antidepressant-like action of the marine alga Solieria filiformis lectin (SfL) and to investigate the participation of the monoaminergic system in this action. For this, male Swiss mice (n=10) were pretreated with intravenous injections (i.v.) of SfL (1, 3 or 9mg/kg) and submitted to open field (OFT), tail suspension (TST), forced swimming (FST), elevated plus-maze (EPMT) and hole-board tests (HBT). As controls, mice received sterile saline (i.v.), imipramine (10 or 30mg/kg; intraperitoneally - i...
December 28, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29288746/a-new-synthetic-drug-5-2-aminopropyl-indole-5-it-induces-rewarding-effects-and-increases-dopamine-d1-receptor-and-dopamine-transporter-mrna-levels
#19
Chrislean Jun Botanas, Seong Shoon Yoon, June Bryan de la Peña, Irene Joy Dela Peña, Mikyung Kim, Raly James Custodio, Taeseon Woo, Joung-Wook Seo, Choon-Gon Jang, Ji Seul Yang, Yoon Mi Yoon, Yong Sup Lee, Hee Jin Kim, Jae Hoon Cheong
In recent years, there has been a marked increase in the use of recreational synthetic psychoactive substances, which is a cause of concern among healthcare providers and legal authorities. In particular, there have been reports on the misuse of 5-(2-aminopropyl)indole (5-API; 5-IT), a new synthetic drug, and of fatal and non-fatal intoxication. Despite these reports, little is known about its psychopharmacological effects and abuse potential. Here, we investigated the abuse potential of 5-IT by evaluating its rewarding and reinforcing effects through conditioned place preference (CPP) (1, 10, and 30 mg/kg, i...
December 27, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/29287200/gramine-attenuates-egfr-mediated-inflammation-and-cell-proliferation-in-oral-carcinogenesis-via-regulation-of-nf-%C3%AE%C2%BAb-and-stat3-signaling
#20
Arunkumar Ramu, Suresh Kathiresan, Hemavardhini Ramadoss, Anandhi Nallu, Ramachandran Kaliyan, Theerthu Azamuthu
Gramine, a natural indole alkaloid found in Hordeum vulgare has been possesses anti-mutagenic properties. The aim of the present study was to evaluate the effect of gramine on inflammation and proliferation in 7,12-dimethylbenz[a]anthracene(DMBA)-induced hamster buccal pouch (HBP) carcinogenesis. Epidermal growth factor receptor (EGFR) tyrosine kinase phosphorylation trigged PI3K/Akt/mTOR and JAK signaling that activates NF-κB and STAT3. In contrast, gramine suppressed EGFR tyrosine kinase phosphorylation and simultaneously inhibiting PI3K/Akt/mTOR and JAK phosphorylation, thereby blockage NF-κB and STAT3 nuclear translocation...
December 26, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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