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https://www.readbyqxmd.com/read/28099851/a-molecular-and-cellular-context-dependent-role-for-ir76b-in-detection-of-amino-acid-taste
#1
Anindya Ganguly, Lisa Pang, Vi-Khoi Duong, Angelina Lee, Hanni Schoniger, Erika Varady, Anupama Dahanukar
Amino acid taste is expected to be a universal property among animals. Although sweet, bitter, salt, and water tastes have been well characterized in insects, the mechanisms underlying amino acid taste remain elusive. From a Drosophila RNAi screen, we identify an ionotropic receptor, Ir76b, as necessary for yeast preference. Using calcium imaging, we identify Ir76b(+) amino acid taste neurons in legs, overlapping partially with sweet neurons but not those that sense other tastants. Ir76b mutants have reduced responses to amino acids, which are rescued by transgenic expression of Ir76b and a mosquito ortholog AgIr76b...
January 17, 2017: Cell Reports
https://www.readbyqxmd.com/read/28077315/inhibition-of-inos-alleviates-cognitive-deficits-and-depression-in-diabetic-mice-through-downregulating-the-no-sgc-cgmp-pkg-signal-pathway
#2
Xiao Yan Zhou, Fang Zhang, Chang Jiang Ying, Jing Chen, Ling Chen, Jing Dong, Yue Shi, Mang Tang, Xiao Tong Hu, Zhi Hua Pan, Na Na Xu, Kui Yang Zheng, Ren Xian Tang, Yuan Jian Song
Diabetes mellitus often results in a number of complications involving impaired brain function, including cognitive deficits and depression. However, the potential mechanisms for diabetes-related cognitive deficits and depression are not fully understood. Neurons in the hippocampal, cortical and amygdala functional regions are more susceptible to damage during hyperglycemia. Neuroprotection in the brain can rescue cognitive deficits and depression induced by hyperglycemia. This study investigated the potential mechanisms underlying diabetes-related congnitive deficits and depression, determined whether the inflammatory factor inducible nitric oxide synthase (iNOS) and the nitric oxide (NO)/soluble guanylyl cyclases (sGC)/cyclic guanosine monophosphate (cGMP)/protein kinase G (PKG) pathway, play key roles in cognitive deficits and depression associated...
January 8, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28073379/tau-passive-immunization-inhibits-not-only-tau-but-also-a%C3%AE-pathology
#3
Chun-Ling Dai, Yunn Chyn Tung, Fei Liu, Cheng-Xin Gong, Khalid Iqbal
BACKGROUND: Accumulation of hyperphosphorylated tau protein is a histopathological hallmark of Alzheimer's disease (AD) and related tauopathies. Currently, there is no effective treatment available for these progressive neurodegenerative diseases. In recent years, tau immunotherapy has shown great potential in animal models. We report the effect of immunization with tau antibodies 43D against tau 6-18 and 77E9 against tau 184-195 on tau and amyloid-β (Aβ) pathologies and cognition in triple-transgenic (3×Tg)-AD mice at mild to moderate stages of the disease...
January 10, 2017: Alzheimer's Research & Therapy
https://www.readbyqxmd.com/read/28057529/genetic-inhibition-of-anaplastic-lymphoma-kinase-rescues-cognitive-impairments-in-neurofibromatosis-1-mutant-mice
#4
Joseph B Weiss, Sydney J Weber, Eileen Ruth S Torres, Tessa Marzulla, Jacob Raber
Heterozygous Neurofibromatosis 1 (NF1) loss of function mutations occur in approximately 90% of patients with neurofibromatosis. A major, disabling phenotypic consequence of reduced NF1 function is cognitive impairment; a possibly related behavioral phenotype is impaired sleep. Recent results in Drosophila have demonstrated a genetic interaction between Anaplastic Lymphoma Kinase (Alk) and NF1 for both associative learning and sleep. Inhibition of Alk improves associative learning and sleep in heterozygous NF1 mutant flies...
January 3, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28043267/-investigation-of-emergency-capacities-for-occupational-hazard-accidents-in-silicon-solar-cell-producing-enterprises
#5
D D Yang, J N Xu, B L Zhu
Objective: To investigate and analyze the influential factors of occupational hazard acci-dents, emergency facilities and emergency management in Silicon solar cell producing enterprises, then to pro-vide scientific strategies. Methods: The methods of occupationally healthy field investigating, inspecting of ven-tilation effectiveness, setup of emergency program and wearing chemical suit were used. Results: The mainly occupational hazard accidents factors in the process of Silicon solar cell producing included poisoning chemi-cals, high temperature, onizing radiation and some workplaces...
November 20, 2016: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/28032667/caffeine-alleviates-progressive-motor-deficits-in-a-transgenic-mouse-model-of-spinocerebellar-ataxia
#6
Nélio Gonçalves, Ana T Simões, Rui S Prediger, Hirokazu Hirai, Rodrigo A Cunha, Luís Pereira de Almeida
OBJECTIVE: Machado-Joseph disease (MJD) is a neurodegenerative spinocerebellar ataxia (SCA) associated with an expanded polyglutamine tract within ataxin-3 for which there is currently no available therapy. We previously showed that caffeine, a non-selective adenosine receptor antagonist, delays the appearance of striatal damage resulting from expression of full-length mutant ataxin-3. Here we investigated the ability of caffeine to alleviate behavioral deficits and cerebellar neuropathology in transgenic mice with a severe ataxia resulting from expression of a truncated fragment of polyglutamine-expanded ataxin-3 in Purkinje cells...
December 29, 2016: Annals of Neurology
https://www.readbyqxmd.com/read/28025042/quercetin-ameliorates-chronic-unpredicted-stress-mediated-memory-dysfunction-in-male-swiss-albino-mice-by-attenuating-insulin-resistance-and-elevating-hippocampal-glut4-levels-independent-of-insulin-receptor-expression
#7
Vineet Mehta, Arun Parashar, Arun Sharma, Tiratha Raj Singh, Malairaman Udayabanu
Chronic stress is associated with impaired neuronal functioning, altered insulin signaling, and behavioral dysfunction. Quercetin has shown neuroprotective and antidiabetic effects, besides modulating cognition and insulin signaling. Therefore, in the present study, we explored whether or not quercetin ameliorates stress-mediated cognitive dysfunction and explored the underlying mechanism. Swiss albino male mice were subjected to an array of unpredicted stressors for 21days, during which 30mg/kg quercetin treatment was given orally...
December 23, 2016: Hormones and Behavior
https://www.readbyqxmd.com/read/28004064/-secondary-hyperuricemia-in-chronic-renal-failure-promotes-vascular-calcification-in-rats
#8
Zhe Song, Yang Zhao, Xian Wang, Ming-Jiang Xu
The present study was aimed to explore the effects of hyperuricemia on vascular calcification in chronic renal failure (CRF) and the mechanisms. Adenine diet-induced CRF rat model was used. Twenty-three male 8-week-old Wistar rats were randomly divided into control group (Ctr, n = 5), CRF group (n = 8) and CRF plus allopurinol group (CRF + ALL, n = 10), and the rats were given standard diet plus standard drinking water, adenine diet plus standard drinking water and adenine diet plus allopurinol drinking for 6 weeks, respectively...
December 25, 2016: Sheng Li Xue Bao: [Acta Physiologica Sinica]
https://www.readbyqxmd.com/read/28003243/interleukin-2-improves-amyloid-pathology-synaptic-failure-and-memory-in-alzheimer-s-disease-mice
#9
Sandro Alves, Guillaume Churlaud, Mickael Audrain, Kristin Michaelsen-Preusse, Romain Fol, Benoit Souchet, Jérôme Braudeau, Martin Korte, David Klatzmann, Nathalie Cartier
Interleukin-2 (IL-2)-deficient mice have cytoarchitectural hippocampal modifications and impaired learning and memory ability reminiscent of Alzheimer's disease. IL-2 stimulates regulatory T cells whose role is to control inflammation. As neuroinflammation contributes to neurodegeneration, we investigated IL-2 in Alzheimer's disease. Therefore, we investigated IL-2 levels in hippocampal biopsies of patients with Alzheimer's disease relative to age-matched control individuals. We then treated APP/PS1ΔE9 mice having established Alzheimer's disease with IL-2 for 5 months using single administration of an AAV-IL-2 vector...
December 20, 2016: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/27984208/oral-administration-of-grape-seed-polyphenol-extract-restores-memory-deficits-in-chronic-cerebral-hypoperfusion-rats
#10
Chen Chen, Yake Zheng, Tianwen Wu, Chuanjie Wu, Xuan Cheng
Chronic cerebral hypoperfusion (CCH) has been recognized as an important cause of both vascular dementia and Alzheimer's disease (AD), the two most prominent neurodegenerative diseases causing memory impairment in the elderly. However, an effective therapy for CCH-induced memory impairment has not yet been established. Grape seed polyphenol extract (GSPE) has powerful antioxidant properties and protects neurons and glia during ischemic injury, but its potential use in the prevention of CCH-induced memory impairment has not yet been investigated...
December 14, 2016: Behavioural Pharmacology
https://www.readbyqxmd.com/read/27982458/risk-factors-for-long-term-post-traumatic-stress-disorder-among-medical-rescue-workers-appointed-to-the-2008-wenchuan-earthquake-response-in-china
#11
Ellen J Schenk, Jun Yuan, Lise D Martel, Guo-Qing Shi, Ke Han, Xing Gao
This study aims to determine the risk factors for clinically-significant post-traumatic stress disorder (PTSD) among Chinese medical rescue workers one year after the response to the Wenchuan earthquake on 12 May 2008. A sample of 337 medical workers who performed response work within the first three months of the event completed an online questionnaire, which included information on demographics, social support, the management and organisation of the disaster response, and an assessment of PTSD. Symptoms consistent with PTSD were prevalent in 17 per cent of the rescue workers...
December 16, 2016: Disasters
https://www.readbyqxmd.com/read/27966205/increasing-the-probability-of-surviving-loss-of-consciousness-underwater-when-using-a-rebreather
#12
REVIEW
Paul Haynes
Re-circulating underwater breathing apparatus (rebreathers) have become increasingly popular amongst sport divers. In comparison to open-circuit scuba, rebreathers are complex life support equipment that incorporates many inherent failure modes and potential for human error. This individually or in combination can lead to an inappropriate breathing gas. Analysis of rebreather diving incidents suggests that inappropriate breathing gas is the most prevalent disabling agent. This can result in spontaneous loss of consciousness (LoC), water aspiration and drowning...
December 2016: Diving and Hyperbaric Medicine: the Journal of the South Pacific Underwater Medicine Society
https://www.readbyqxmd.com/read/27936013/%C3%AE-asarone-rescues-pb-induced-impairments-of-spatial-memory-and-synaptogenesis-in-rats
#13
Qian-Qian Yang, Wei-Zhen Xue, Rong-Xin Zou, Yi Xu, Yang Du, Shuang Wang, Lai Xu, Yuan-Zhi Chen, Hui-Li Wang, Xiang-Tao Chen
Chronic lead (Pb) exposure causes cognitive deficits. This study aimed to explore the neuroprotective effect and mechanism of β-asarone, an active component from Chinese Herbs Acorus tatarinowii Schott, to alleviate impairments of spatial memory and synaptogenesis in Pb-exposed rats. Both Sprague-Dawley developmental rat pups and adult rats were used in the study. Developmental rat pups were exposed to Pb throughout the lactation period and β-asarone (10, 40mg kg-1, respectively) was given intraperitoneally from postnatal day 14 to 21...
2016: PloS One
https://www.readbyqxmd.com/read/27933491/nlrp3-is-required-for-complement-mediated-caspase-1-and-il-1beta-activation-in-ich-short-title-for-running-head-nlrp3-is-required-for-ich
#14
Sheng-Tao Yao, Fang Cao, Jia-Lin Chen, Wei Chen, Rui-Ming Fan, Gang Li, You-Chao Zeng, Song Jiao, Xiang-Ping Xia, Chong Han, Qi-Shan Ran
Complement-mediated inflammation plays a vital role in intracerebral hemorrhage (ICH), implicating pro-inflammatory factor interleukin-1beta (IL-1β) secretion. Brain samples and contralateral hemiencephalon were all collected and detected by Western blot. NLRP3 expression was located by dual immunofluorescence staining at 1, 3, and 5 days post-ICH. Brain water content was examined post-ICH. The neural deficit scores were evaluated by observers blindly. ILs were detected by ELISA. SiRNAs targeting NLRP3 (siNLRP3), siASC, and siControl were injected to inhibit NLRP3 function...
December 8, 2016: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/27931146/d-cycloserine-restores-experience-dependent-neuroplasticity-after-tbi-in-the-developing-rat-brain
#15
Naomi Sulit Sta Maria, Maxine Lane Reger, Yan Cai, Mary Anne Tezheart Mercado Baquing, Floyd Buen, Aditya Ponnaluri, David Hovda, Neil G Harris, Christopher C Giza
Traumatic brain injury (TBI) in children can cause persisting cognitive and behavioral dysfunction and inevitably raises concerns about lost potential in these injured youths. Lateral fluid percussion injury (FPI) in weanling rats pathologically affects hippocampal NMDAR- and AMPAR-mediated glutamatergic neurotransmission subacutely, within the first post-injury week. FPI to weanling rats has also been shown to impair enriched-environment (EE) induced enhancement of Morris water maze (MWM) learning and memory in adulthood...
December 8, 2016: Journal of Neurotrauma
https://www.readbyqxmd.com/read/27918851/influence-of-a-100-m-simulated-in-water-rescue-on-cardiopulmonary-parameters
#16
Ana Sousa, Ricardo J Fernandes, Núria Rodríguez, J Arturo Abraldes
OBJECTIVE: Cardiopulmonary resuscitation (CPR) after a drowning episode is performed under fatigue conditions. However, the characterization of CPR in this context is still unknown. Our purpose was to investigate the effect of a 100-m simulated in-water rescue on CPR and physiological parameters in trained certified lifeguards. METHODS: Thirty trained certified lifeguards (age 24.6 ± 3.8 yrs; height 178.2 ± 7.4 cm and weight 76.9 ± 10.6 kg) completed two protocols using an adult manikin: (i) 4-min CPR after 4-min baseline conditions (CPR), and (ii) 4-min CPR after a 100-m simulated in-water rescue in the sea (CPR Rescue), both with a compression-ventilation ratio of 30:2...
December 5, 2016: Prehospital Emergency Care
https://www.readbyqxmd.com/read/27917356/response-and-recovery-measures-for-two-floods-in-north-china-during-the-nineteenth-century-a-comparative-study
#17
Yu Ye, Xiuqi Fang, Fan Li
BACKGROUND: The process of human response to natural disasters and its mechanisms as revealed by historical events still has a broad significance for modern society. This study analyzed the disaster relief process and the social response for two floods in China: the Yongding River flood in 1801 and the Yellow River flood in 1841. These two floods reflect the different response processes between the national and provincial capitals during a stage of climate cooling and social transition in the Qing dynasty...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27913309/sequence-determinants-of-the-caenhorhabditis-elegans-dopamine-transporter-dictating-in-vivo-axonal-export-and-synaptic-localization
#18
Sarah B Robinson, J Andrew Hardaway, Shannon L Hardie, Jane Wright, Ryan M Glynn, Daniel P Bermingham, Qiao Han, Sarah M Sturgeon, Phyllis Freeman, Randy D Blakely
The monoamine neurotransmitter dopamine (DA) acts across phylogeny to modulate both simple and complex behaviors. The presynaptic DA transporter (DAT) is a major determinant of DA signaling capacity in ensuring efficient extracellular DA clearance. In humans, DAT is also a major target for prescribed and abused psychostimulants. Multiple structural determinants of DAT function and regulation have been defined, though largely these findings have arisen from heterologous expression or ex vivo cell culture studies...
January 2017: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/27904994/rapamycin-protects-sepsis-induced-cognitive-impairment-in-mouse-hippocampus-by-enhancing-autophagy
#19
Wenyu Liu, Jia'nan Guo, Jie Mu, Linyu Tian, Dong Zhou
The purpose of this study is to test the hypothesis that the mammalian target of rapamycin (mTOR) signaling pathway might mediate neuroprotection in a mouse model of septic encephalopathy and also to identify the role of autophagy. Mice were subjected to cecal ligation and puncture (CLP) or a sham operation, and all 50 mice were randomly assigned to five groups: sham, CLP+ saline, CLP+ rapamycin (1, 5, 10 mg/kg) groups. Two weeks after the operation, Morris water maze was conducted for behavioral test; Nissl staining was used for observing glia infiltration; immunohistochemical staining and biochemical measures in hippocampi were performed to detect mTOR targets and autophagy indicators...
December 1, 2016: Cellular and Molecular Neurobiology
https://www.readbyqxmd.com/read/27904674/bmi1-plays-an-important-role-in-dentin-and-mandible-homeostasis-by-maintaining-redox-balance
#20
Ying Yin, Xian Xue, Qian Wang, Ning Chen, Dengshun Miao
To explore whether polycomb repressor Bmi1 plays an important role in dentin and mandible development homeostasis by maintaining redox balance, 3-week-old Bmi1 gene knockout (Bmi1(-/-)) mice were treated with the antioxidant N-acetylcysteine (NAC) for 2 weeks in their drinking water and phenotypes of the tooth and mandibles were compared with vehicle-treated Bmi1(-/-) mice and wild-type mice by radiograph, histochemistry and immunohistochemistry. Alterations of oxidative stress, DNA damage, cell proliferation and cell cycle-related parameters were also examined in mandibles...
2016: American Journal of Translational Research
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