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https://www.readbyqxmd.com/read/28520620/-epigallocatechin-3-gallate-ameliorates-memory-impairment-and-rescues-the-abnormal-synaptic-protein-levels-in-the-frontal-cortex-and-hippocampus-in-a-mouse-model-of-alzheimer-s-disease
#1
Yufang Guo, Yan Zhao, Ying Nan, Xiang Wang, Yulong Chen, Shuang Wang
(-)-Epigallocatechin-3-gallate (EGCG) is the most abundant polyphenolic extract in green tea and it has attracted increasing attention for its multiple bioactive effects. However, the mechanisms by which EGCG exerts its neuroprotective actions in Alzheimer's disease (AD) are presently lacking. In the present study, a sporadic AD transgenic mouse model known as senescence-accelerated mouse prone 8 (SAMP8) was used to investigate whether oral administration of EGCG could improve recognition and memory function through reduction of amyloid β (Aβ) and tau hyperphosphorylation...
May 17, 2017: Neuroreport
https://www.readbyqxmd.com/read/28514734/inflammatory-microrna-194-and-515-attenuate-the-biosynthesis-of-chondroitin-sulfate-during-human-intervertebral-disc-degeneration
#2
Bo Hu, Chen Xu, Ye Tian, Changgui Shi, Ying Zhang, Lianfu Deng, Hongyu Zhou, Peng Cao, Huajiang Chen, Wen Yuan
Intervertebral disc degeneration (IDD) is characterized by dehydration and loss of extracellular matrixes in the nucleus pulposus region. Chondroitin sulfate has been found to be the water-binding molecule that played a key role in IDD. Although investigators have reported that inflammatory cytokines are involved in the reduction of chondroitin sulfate in IDD, but the underlying mechanism is unrevealed. Since chondroitin sulfate synthesis is controlled by chondroitin sulfate glycosyltransferases CHSY-1/2/3 and CSGALNACT-1/2, their functional role and regulatory mechanism in IDD is not fully studied...
May 2, 2017: Oncotarget
https://www.readbyqxmd.com/read/28506045/serological-and-molecular-detection-of-toxoplasma-gondii-and-babesia-microti-in-the-blood-of-rescued-wild-animals-in-gangwon-do-province-korea
#3
Sung-Hee Hong, Hee-Jong Kim, Young-Il Jeong, Shin-Hyeong Cho, Won-Ja Lee, Jong-Tak Kim, Sang-Eun Lee
Infections of Toxoplasma gondii and Babesia microti are reported in many wild animals worldwide, but information on their incidence and molecular detection in Korean wild fields is limited. In this study, the prevalence of T. gondii and B. microti infection in blood samples of 5 animal species (37 Chinese water deer, 23 raccoon dogs, 6 roe deer, 1 wild boar, and 3 Eurasian badgers) was examined during 2008-2009 in Gangwon-do (Province), the Republic of Korea (=Korea) by using serological and molecular tests...
April 2017: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/28499986/n-acetylcysteine-treatment-attenuates-the-cognitive-impairment-and-synaptic-plasticity-loss-induced-by-streptozotocin
#4
Michael da Costa, Jamile Bernardi, Lidiane Costa, Tiago Fiuza, Ricardo Brandão, Maria F Ribeiro, Joana D Amaral, Cecília M P Rodrigues, Maria E Pereira
Alzheimer's disease (AD) is a neurodegenerative disorder pathologically characterized by severe neuronal and glial structural changes and progressive cognitive decline. N-acetylcysteine (NAC) is a well-known pharmacological agent with pro-neurogenic properties and neuroprotective effects. In this study, we evaluated NAC protective effects on cognitive impairment and associated pathological markers in a streptozotocin (STZ)-induced sporadic dementia of AD type mice model. Animals were divided into six groups: I) Sham, II) NAC, III) physostigmine (PHY), IV) STZ, V) NAC + STZ and VI) PHY + NAC...
May 9, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28486690/rhabdomyolysis-with-acute-tubular-necrosis-following-occupational-inhalation-of-thinners
#5
D Ngajilo, R Ehrlich
Thinners are mixtures of organic solvents commonly containing toluene, xylene, acetone, hexane, benzene and methyl isobutyl ketone. This report describes a case of rhabdomyolysis with acute tubular necrosis and renal failure, most likely attributable to toluene, following occupational exposure to thinners while cleaning a steel water tank. These adverse health effects have previously been reported following acute poisoning or intentional inhalation by drug abusers, but rarely in the occupational setting. Poor working conditions, lack of health and safety training and delayed treatment contributed to the onset and severity of the patient's complications...
May 9, 2017: Occupational Medicine
https://www.readbyqxmd.com/read/28483881/cuticle-biosynthesis-is-developmentally-regulated-by-abscisic-acid
#6
Laetitia B B Martin, Paco Romero, Eric A Fich, David Domozych, Jocelyn K C Rose
The expansion of aerial organs in plants is coupled with the synthesis and deposition of a hydrophobic cuticle, composed of cutin and waxes, which is critically important in limiting water loss. While the abiotic stress related hormone abscisic acid (ABA) is known to upregulate wax accumulation in response to drought, the hormonal regulation of cuticle biosynthesis during organ ontogeny is poorly understood. To address the hypothesis that ABA also mediates cuticle formation during organ development, we assessed the effect of ABA deficiency on cuticle formation in three ABA biosynthesis impaired tomato mutants...
May 8, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28480587/melatonin-successfully-rescues-hippocampal-bioenergetics-and-improves-cognitive-function-following-drug-intoxication-by-promoting-nrf2-are-signaling-activity
#7
Li-You Chen, Ting-Yi Renn, Wen-Chieh Liao, Fu-Der Mai, Ying-Jui Ho, George Hsiao, Ai-Wei Lee, Hung-Ming Chang
Prolonged exposure to gamma-hydroxybutyric acid (GHB) would cause drug intoxication in which impaired cognitive function results from enhanced hippocampal oxidative stress may serve as a major symptom in this deficiency. Considering melatonin possesses significant anti-oxidative efficacy, present study aims to determine whether melatonin would successfully promote the Nrf2-ARE signaling, depress oxidative stress, and rescue hippocampal bioenergetics and cognitive function following drug intoxication injury...
May 8, 2017: Journal of Pineal Research
https://www.readbyqxmd.com/read/28476949/angiotensin-iv-receptors-mediate-the-cognitive-and-cerebrovascular-benefits-of-losartan-in-a-mouse-model-of-alzheimer-s-disease
#8
Jessika Royea, Luqing Zhang, Xin-Kang Tong, Edith Hamel
The use of angiotensin receptor blockers (ARBs) correlates with reduced onset and progression of Alzheimer's disease (AD). The mechanism depicting how ARBs, such as losartan, restore cerebrovascular and cognitive deficits in AD is unknown. Here, we propose a mechanism underlying losartan's benefits by selectively blocking the effects of Angiotensin IV (AngIV) at its receptor (AT4R) with divalinal in mice overexpressing the AD-related Swedish and Indiana mutations of the human amyloid precursor protein (APP mice) and wild-type mice...
May 5, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28473768/knockdown-of-pp32-increases-histone-acetylation-and-ameliorates-cognitive-deficits
#9
Qiong Feng, Gao-Shang Chai, Zhi-Hao Wang, Yu Hu, Dong-Sheng Sun, Xiao-Guang Li, Rong-Hong Ma, Yi-Rong Li, Dan Ke, Jian-Zhi Wang, Gong-Ping Liu
Aging is a cause of cognitive decline in the elderly and the major risk factor for Alzheimer's disease, however, aging people are not all destined to develop into cognitive deficits, the molecular mechanisms underlying this difference in cognition of aging people are obscure. Epigenetic modifications, particularly histone acetylation in the nervous system, play a critical role in regulation of gene expression for learning and memory. An inhibitor of acetyltransferases (INHAT) is reported to suppress histone acetylation via a histone-masking mechanism, and pp32 is a key component of INHAT complex...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28472990/downregulating-anp32a-rescues-synapse-and-memory-loss-via-chromatin-remodeling-in-alzheimer-model
#10
Gao-Shang Chai, Qiong Feng, Zhi-Hao Wang, Yu Hu, Dong-Sheng Sun, Xiao-Guang Li, Dan Ke, Hong-Lian Li, Gong-Ping Liu, Jian-Zhi Wang
BACKGROUND: The impairment of histone acetylation is causally linked to the cognitive decline in Alzheimer's disease (AD). In addition to histone acetyltransferases (HATs) and histone deacetylases (HDACs), inhibitor of acetyltransferases (INHAT) can also regulate histone acetylation. As a key component of INHAT, level of ANP32A is selectively upregulated in the brain of AD patients. Here we investigated whether downregulating ANP32A can rescue AD-like synapse and memory deficits. METHODS: RFP-labeled lentiviral ANP32A-shRNA was infused stereotaxically into the hippocampal CA3 region of the human tau transgenic mice (termed htau)...
May 4, 2017: Molecular Neurodegeneration
https://www.readbyqxmd.com/read/28467418/a-kcnc3-mutation-causes-a-neurodevelopmental-non-progressive-sca13-subtype-associated-with-dominant-negative-effects-and-aberrant-egfr-trafficking
#11
Swati Khare, Jerelyn A Nick, Yalan Zhang, Kira Galeano, Brittany Butler, Habibeh Khoshbouei, Sruti Rayaprolu, Tyisha Hathorn, Laura P W Ranum, Lisa Smithson, Todd E Golde, Martin Paucar, Richard Morse, Michael Raff, Julie Simon, Magnus Nordenskjöld, Karin Wirdefeldt, Diego E Rincon-Limas, Jada Lewis, Leonard K Kaczmarek, Pedro Fernandez-Funez, Harry S Nick, Michael F Waters
The autosomal dominant spinocerebellar ataxias (SCAs) are a diverse group of neurological disorders anchored by the phenotypes of motor incoordination and cerebellar atrophy. Disease heterogeneity is appreciated through varying comorbidities: dysarthria, dysphagia, oculomotor and/or retinal abnormalities, motor neuron pathology, epilepsy, cognitive impairment, autonomic dysfunction, and psychiatric manifestations. Our study focuses on SCA13, which is caused by several allelic variants in the voltage-gated potassium channel KCNC3 (Kv3...
2017: PloS One
https://www.readbyqxmd.com/read/28453731/shear-stress-regulated-mir-27b-controls-pericyte-recruitment-by-repressing-sema6a-and-sema6d
#12
Shemsi Demolli, Anuradha Doddaballapur, Kavi Devraj, Konstantin Stark, Yosif Manavski, Annekathrin Eckart, Christoph M Zehendner, Tina Lucas, Thomas Korff, Markus Hecker, Steffen Massberg, Stefan Liebner, David Kaluza, Reinier A Boon, Stefanie Dimmeler
Aims: Vessel maturation involves the recruitment of mural cells such as pericytes and smooth muscle cells. Laminar shear stress is a major trigger for vessel maturation, but the molecular mechanisms by which shear stress affects recruitment of pericytes are unclear. MicroRNAs (miRs) are small non-coding RNAs, which post-transcriptionally control gene expression. The aim of the present study was to unveil the mechanism by which shear stress-regulated microRNAs contribute to vessel maturation...
May 1, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28395091/morbidity-among-the-israeli-defense-force-response-team-during-nepal-post-earthquake-mission-2015
#13
Tamar Lachish, Aviad Bar, Heli Alalouf, Ofer Merin, Eli Schwartz
Background: On 25 April 2015, a 7.8-magnitude earthquake struck Nepal. Soon after, the Israel Defense Force (IDF) dispatched a rapid-response team and opened a tertiary field hospital in Kathmandu. There is limited data regarding the spectrum of diseases among rescue teams to disease-stricken areas. The aim of this study was to assess the morbidity among the field-hospital staff during the mission. Methods: The rescue team was deployed for a 2-week mission in Kathmandu...
March 1, 2017: Journal of Travel Medicine
https://www.readbyqxmd.com/read/28384531/proteome-analysis-reveals-an-energy-dependent-central-process-for-populus%C3%A3-canadensis-seed-germination
#14
Hong Zhang, Ke-Xin Zhou, Wei-Qing Wang, Shu-Jun Liu, Song-Quan Song
Poplar (Populus×canadensis) seeds rapidly germinated in darkness at 10, 15, and 20°C and reached 50% seed germination after about 22, 4.5, and 3.5h, respectively. Germination of poplar seeds was markedly inhibited by abscisic acid (ABA) at 50μM and cycloheximide (CHX) at 100μM, and these inhibitive roles were temperature-dependent. In the present study, mature poplar seeds were used to investigate the differentially changed proteome of seeds germinating in water, ABA, and CHX. A total of 130 protein spots showed a significant change (1...
March 18, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28339741/shear-stress-regulated-mir-27b-controls-pericyte-recruitment-by-repressing-sema6a-and-sema6d
#15
Shemsi Demolli, Anuradha Doddaballapur, Kavi Devraj, Konstantin Stark, Yosif Manavski, Annekathrin Eckart, Christoph Zehendner, Tina Lucas, Thomas Korff, Markus Hecker, Steffen Massberg, Stefan Liebner, David Kaluza, Reinier A Boon, Stefanie Dimmeler
Aims: Vessel maturation involves the recruitment of mural cells such as pericytes and smooth muscle cells. Laminar shear stress is a major trigger for vessel maturation, but the molecular mechanisms by which shear stress affects recruitment of pericytes are unclear. MicroRNAs (miRs) are small non-coding RNAs, which post-transcriptionally control gene expression. The aim of the present study was to unveil the mechanism by which shear stress-regulated microRNAs contribute to vessel maturation...
February 23, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28306747/hypothermic-stunning-of-green-sea-turtles-in-a-western-gulf-of-mexico-foraging-habitat
#16
Donna J Shaver, Philippe E Tissot, Mary M Streich, Jennifer Shelby Walker, Cynthia Rubio, Anthony F Amos, Jeffrey A George, Michelle R Pasawicz
Texas waters provide one of the most important developmental and foraging habitats for juvenile green turtles (Chelonia mydas) in the western Gulf of Mexico, but hypothermic stunning is a significant threat and was the largest cause of green turtle strandings in Texas from 1980 through 2015; of the 8,107 green turtles found stranded, 4,529 (55.9%) were victims of hypothermic stunning. Additionally, during this time, 203 hypothermic stunned green turtles were found incidentally captured due to power plant water intake entrapment...
2017: PloS One
https://www.readbyqxmd.com/read/28298519/abnormal-inflorescence-meristem1-functions-in-salicylic-acid-biosynthesis-to-maintain-proper-reactive-oxygen-species-levels-for-root-meristem-activity-in-rice
#17
Lei Xu, Hongyu Zhao, Wenyuan Ruan, Minjuan Deng, Fang Wang, Jinrong Peng, Jie Luo, Zhixiang Chen, Keke Yi
Root meristem activity determines root growth and root architecture and consequently affects water and nutrient uptake in plants. However, our knowledge about the regulation of root meristem activity in crop plants is very limited. Here, we report the isolation and characterization of a short root mutant in rice (Oryza sativa) with reduced root meristem activity. This root growth defect is caused by a mutation in ABNORMAL INFLORESCENCE MERISTEM1 (AIM1), which encodes a 3-hydroxyacyl-CoA dehydrogenase, an enzyme involved in β-oxidation...
March 2017: Plant Cell
https://www.readbyqxmd.com/read/28298306/il-1%C3%AE-induces-nf-%C3%AE%C2%BAb-and-upregulates-microrna-372-to-inhibit-spinal-cord-injury-recovery
#18
Wei Zhou, Tongzhou Yuan, Youshui Gao, Peipei Yin, Wei Liu, Chenhao Pan, Yingjie Liu, Xiaowei Yu
Excessive inflammation including IL-1β-initiated signaling is among the earlies reactions that can cause neuronal damage following spinal cord injury (SCI). It has been suggested that microRNAs may participate in stem cell repair to facilitate functional recovery after SCI. Here we showed that in cultured human neural stem cells (hNSC) IL-1β reduced the expressions of both KIF3B (kinesin family member 3B) and NOSIP (nitric oxide synthase interacting protein), two key modulators for restricting inflammation and promoting neuronal regeneration...
March 15, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28294536/acetylglutamate-kinase-is-required-for-both-gametophyte-function-and-embryo-development-in-arabidopsis-thaliana
#19
Jie Huang, Dan Chen, Hailong Yan, Fei Xie, Ying Yu, Liyao Zhang, Mengxiang Sun, Xiongbo Peng
The specific functions of the genes encoding arginine biosynthesis enzymes in plants are not well characterized. We report the isolation and characterization of Arabidopsis thaliana N-acetylglutamate kinase (NAGK), which catalyzes the second step of arginine biosynthesis. NAGK is a plastid-localized protein and is expressed in most developmental processes in Arabidopsis. Heterologous expression of the Arabidopsis NAGK gene in a NAGK-deficient Escherichia coli strain fully restores bacterial growth on arginine-deficient medium...
March 15, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28285915/adamantyl-and-other-polycyclic-cage-based-conjugates-of-desferrioxamine-b-dfob-for-treating-iron-mediated-toxicity-in-cell-models-of-parkinson-s-disease
#20
Thomas J Telfer, Jeffrey R Liddell, Clare Duncan, Anthony R White, Rachel Codd
The death of dopaminergic neurons is a major pathological hallmark of Parkinson's disease (PD). Elevated iron within the substantia nigra of the PD brain is thought to catalyze this neuronal death through hydroxyl radical-derived oxidative damage. Removing this excess iron presents a potential therapeutic strategy for PD. Seventeen derivatives of the non-toxic iron chelator desferrioxamine B (DFOB) were prepared by the conjugation of adamantyl- (1-4, 8-12), deconstructed adamantyl units (5-7), norborna(e)ne- (13-16) or bicyclo[2...
March 2, 2017: Bioorganic & Medicinal Chemistry Letters
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