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https://www.readbyqxmd.com/read/28731433/the-effects-of-cardiotrophin-1-on-early-synaptic-mitochondrial-dysfunction-and-synaptic-pathology-in-appswe-ps1de9-mice
#1
Dongmei Wang, Xiaozhuan Liu, Yumei Liu, Sanqiang Li, Chenying Wang
The coexistence of neuronal mitochondrial pathology and synaptic dysfunction is an early pathological feature of Alzheimer's disease (AD). Cardiotrophin-1 (CT-1) has been shown to exhibit impressive neuroprotective effects. Previous studies have shown positive effects of CT-1 on brain glucose metabolism and cognition in APPswe/PS1dE9 transgenic mice; however, little is known about the effects of CT-1 on early synaptic mitochondrial dysfunction and resultant synaptic pathology in the brain. In this study, 4-month-old transgenic mice with brain tissue-specific CT-1 expression were used alone or in combination with APPswe/PS1dE9 transgenic mice to evaluate the effect of CT-1 on synaptic mitochondrial dysfunction and resultant synaptic pathology, and cryptic memory deficits in the APPswe/PS1dE9 transgenic mice...
July 19, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28731302/lead-ii-binding-in-metallothioneins
#2
Daisy L Wong, Maureen E Merrifield-MacRae, Martin J Stillman
Heavy metal exposure has long been associated with metallothionein (MT) regulation and its functions. MT is a ubiquitous, cysteine-rich protein that is involved in homeostatic metal response for the essential metals zinc and copper, as well as detoxification of heavy metals; the most commonly proposed being cadmium. MT binds in vivo to a number of metals in addition to zinc, cadmium and copper, such as bismuth. In vitro, metallation with a wide range of metals (especially mercury, arsenic, and lead) has been reported using a variety of analytical methods...
April 10, 2017: Metal Ions in Life Sciences
https://www.readbyqxmd.com/read/28730834/resveratrol-alleviates-ethanol-induced-hormonal-and-metabolic-disturbances-in-the-rat
#3
J Popelář, M Díaz Gómez, J Lindovský, N Rybalko, J Burianová, T Oohashi, J Syka
Brain-specific link protein Bral2 represents a substantial component of perineuronal nets (PNNs) enwrapping neurons in the central nervous system. To elucidate the role of Bral2 in auditory signal processing, the hearing function in knockout Bral2(-/-) (KO) mice was investigated using behavioral and electrophysiological methods and compared with wild type Bral2(+/+) (WT) mice. The amplitudes of the acoustic startle reflex (ASR) and the efficiency of the prepulse inhibition of ASR (PPI of ASR), produced by prepulse noise stimulus or gap in continuous noise, was similar in 2-week-old WT and KO mice...
July 18, 2017: Physiological Research
https://www.readbyqxmd.com/read/28730313/derivatization-free-lc-ms-ms-method-for-estrogen-quantification-in-mouse-brain-highlights-a-local-metabolic-regulation-after-oral-versus-subcutaneous-administration
#4
Ecaterina Lozan, Svitlana Shinkaruk, Shaam Alice Al Abed, Valérie Lamothe, Mylène Potier, Aline Marighetto, Jean-Marie Schmitter, Catherine Bennetau-Pelissero, Corinne Buré
17β-Estradiol (17β-E2) is a steroid with pleiotropic actions. In addition to being a sexual hormone, it is also produced in the brain where it modulates the reproductive axis. It has been shown that 17β-E2 also acts on synaptic plasticity and plays a role in neurological pathways and in neurodegenerative diseases. Assaying this steroid in the brain is thus interesting to improve our knowledge of 17β-E2 effects in the brain. However, 17β-E2 concentration in the central nervous system has been reported to be of a few nanograms per gram wet weight (nanomolar range concentration); therefore, its quantification requires both an efficient extraction process and a sensitive detection method...
July 20, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28730260/longer-survival-of-a-patient-with-glioblastoma-resected-with-5-aminolevulinic-acid-5-ala-guided-surgery-and-foreign-body-reaction-to-polyglycolic-acid-pga-suture
#5
Raluca Maria Munteanu, Lucian Eva, Bogdan IonuŢ DobrovăŢ, Alin Constantin Iordache, Liviu Pendefunda, Nicoleta Dumitrescu, Doina Mihăilă, Cristina Maria Gavrilescu, Elena Şapte, Ion Poeată
In recent years, there is a growing evidence that using 5-aminolevulinic acid (5-ALA)-guided resection of a cerebral glioblastoma, associated with chemoradiotherapy determine a prolonged survival of these patients, even though this period do not exceed 15 months. 5-ALA is a natural biochemical precursor of heme that is metabolized to fluorescent porphyrins, particularly protoporphyrin IX (PPIX) and no foreign reaction were noted until now. However, foreign body reaction developing in neurosurgery is documented in a few number of cases to suture material, surgical hemostatic material, or surgical glove starch, but up to now we could not find any article about granulomatous inflammation to polyglycolic acid (PGA) suture after brain tumor resection...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28730152/zebrafish-get-connected-investigating-neurotransmission-targets-and-alterations-in-chemical-toxicity
#6
Katharine A Horzmann, Jennifer L Freeman
Neurotransmission is the basis of neuronal communication and is critical for normal brain development, behavior, learning, and memory. Exposure to drugs and chemicals can alter neurotransmission, often through unknown pathways and mechanisms. The zebrafish (Danio rerio) model system is increasingly being used to study the brain and chemical neurotoxicity. In this review, the major neurotransmitter systems, including glutamate, GABA, dopamine, norepinephrine, serotonin, acetylcholine, histamine, and glutamate are surveyed and pathways of synthesis, transport, metabolism, and action are examined...
September 2016: Toxics
https://www.readbyqxmd.com/read/28729917/autophagy-endoplasmic-reticulum-stress-and-the-unfolded-protein-response-in-intracerebral-hemorrhage
#7
Mingming Niu, Xiaohong Dai, Wei Zou, Xueping Yu, Wei Teng, Qiuxin Chen, Xiaowei Sun, Weiwei Yu, Huihui Ma, Peng Liu
Intracerebral hemorrhage (ICH) is a subtype of stroke that is followed by primary and secondary brain injury. As a result of the injury, cell metabolism is disrupted and a series of stress responses are activated, such as endoplasmic reticulum (ER) stress and the unfolded protein response (UPR), leading to the re-establishment of cell homeostasis or cell death. As an important mechanism of cell homeostasis, autophagy has been widely studied, and the associations between autophagy, ER stress, and the UPR have also been demonstrated...
2017: Translational Neuroscience
https://www.readbyqxmd.com/read/28729834/white-matter-hyperintensity-in-elderly-patients-with-diabetes-mellitus-is-associated-with-cognitive-impairment-functional-disability-and-a-high-glycoalbumin-glycohemoglobin-ratio
#8
Yoshiaki Tamura, Yoshiyuki Kimbara, Takuya Yamaoka, Ken Sato, Yuki Tsuboi, Remi Kodera, Yuko Chiba, Seijiro Mori, Yoshinori Fujiwara, Aya M Tokumaru, Hideki Ito, Takashi Sakurai, Atsushi Araki
Aims: Although evidence has accumulated that white matter hyperintensity (WMH) is associated with the deterioration of cognitive function and impairment of activities of daily living (ADL), the clinical relevance of WMH in elderly patients with diabetes mellitus (DM) is not still clear. The aim of this study was to examine whether WMH volume is associated with ADL and cognitive function and whether glucose control and glucose variability can affect WMH volume in these patients. Methods: This cross-sectional study investigated the associations of WMH with cognitive function and instrumental ADL (IADL), as well as metabolic and vascular risk factors in a total of 178 elderly patients with diabetes...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28729678/tumor-ldh-a-expression-and-serum-ldh-status-are-two-metabolic-predictors-for-triple-negative-breast-cancer-brain-metastasis
#9
Tieying Dong, Zhaoliang Liu, Qijia Xuan, Zhuozhong Wang, Wenjie Ma, Qingyuan Zhang
There are limited therapeutic methods for triple negative breast cancer in the clinic, which is easy to progress into the brain to form metastatic lesions and evolve into the terminal stage. Because both the primary cancer and the brain metastasis have high glycolysis, we hypothesize that lactate dehydrogenase (LDH), which catalyzes the final step of glycolysis, may be a predictor, as well as a treatment target, for breast cancer brain metastasis. Therefore, the expression of LDH-A was detected on 119 triple negative breast cancer tissues with immunohistochemistry, and the serum LDH levels were also measured...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28729663/a-comparative-strategy-for-single-nucleus-and-single-cell-transcriptomes-confirms-accuracy-in-predicted-cell-type-expression-from-nuclear-rna
#10
Blue B Lake, Simone Codeluppi, Yun C Yung, Derek Gao, Jerold Chun, Peter V Kharchenko, Sten Linnarsson, Kun Zhang
Significant heterogeneities in gene expression among individual cells are typically interrogated using single whole cell approaches. However, tissues that have highly interconnected processes, such as in the brain, present unique challenges. Single-nucleus RNA sequencing (SNS) has emerged as an alternative method of assessing a cell's transcriptome through the use of isolated nuclei. However, studies directly comparing expression data between nuclei and whole cells are lacking. Here, we have characterized nuclear and whole cell transcriptomes in mouse single neurons and provided a normalization strategy to reduce method-specific differences related to the length of genic regions...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28729418/myc-regulated-mevalonate-metabolism-maintains-brain-tumor-initiating-cells
#11
Xiuxing Wang, Zhi Huang, Qiulian Wu, Briana C Prager, Stephen C Mack, Kailin Yang, Leo J Y Kim, Ryan C Gimple, Yu Shi, Sisi Lai, Qi Xie, Tyler E Miller, Christopher G Hubert, Anne Song, Zhen Dong, Wenchao Zhou, Xiaoguang Fang, Zhe Zhu, Vaidehi Mahadev, Shideng Bao, Jeremy N Rich
Metabolic dysregulation drives tumor initiation in a subset of glioblastomas harboring isocitrate dehydrogenase (IDH) mutations, but metabolic alterations in glioblastomas with wildtype IDH are poorly understood. MYC promotes metabolic reprogramming in cancer, but targeting MYC has proven notoriously challenging. Here, we link metabolic dysregulation in patient-derived brain tumor initiating cells (BTICs) to a nexus between MYC and mevalonate signaling, which can be inhibited by statin or 6-fluoromevalonate treatment...
July 20, 2017: Cancer Research
https://www.readbyqxmd.com/read/28729192/butyrylcholinesterase-knockout-reduces-fibrillar-%C3%AE-amyloid-and-conserves-18-fdg-retention-in-5xfad-mouse-model-of-alzheimer-s-disease
#12
D R DeBay, G A Reid, I R Macdonald, G Mawko, S Burrell, E Martin, C V Bowen, S Darvesh
Alzheimer's disease (AD) is the most common neurodegenerative disorder causing dementia. One hallmark of the AD brain is the deposition of β-amyloid (Aβ) plaques. AD is also a state of cholinergic dysfunction and butyrylcholinesterase (BChE) associates with Aβ pathology. A transgenic mouse (5XFAD) is an aggressive amyloidosis model, producing Aβ plaques of which BChE also associates. A derived strain (5XFAD/BChE-KO), with the BChE gene knocked out, has significantly lower fibrillar Aβ than 5XFAD mice at the same age...
July 17, 2017: Brain Research
https://www.readbyqxmd.com/read/28729191/hypothermia-pretreatment-improves-cognitive-impairment-via-enhancing-synaptic-plasticity-in-a-traumatic-brain-injury-model
#13
Bingjin Liu, Lin Wang, Yun Cao, Weiqi Xu, Fangxiao Shi, Qing Tian, Xinwen Zhou
PosttraumatichypothermiaattenuatescognitivedeficitscausedbyTBIwhen it is administered at an early stage. However, little is known regarding the effect of hypothermia pretreatment on cognitive deficits one month after TBI. In the current study, the behavior test revealed that hypothermia pretreatment mitigates the learning and memory impairment induced by TBI in mice. Hypothermia treatment significantly increased the expression of PSD93, PSD95 and NR2B one month after TBI in the cortex and hippocampus compared with the normothermia group...
July 17, 2017: Brain Research
https://www.readbyqxmd.com/read/28729160/echo-time-dependence-of-the-bold-response-transients-a-window-into-brain-functional-physiology
#14
Martin Havlicek, Dimo Ivanov, Benedikt A Poser, Kamil Uludag
The blood oxygenation level-dependent (BOLD) fMRI response to neuronal activation results from a complex interplay of induced metabolic and vascular changes. Thus, its transients, such as initial overshoot and post-stimulus undershoot, provide a window into the dynamic relationships of the underlying physiological variables. In this study, we propose multi-echo fMRI as a tool to investigate the physiological underpinnings of the BOLD signal, in particular, and brain functional physiology, in general. In the human visual cortex at 3 T, we observed that the BOLD response is nonlinearly dependent on echo-time (TE) and the amount of nonlinearity varies during the entire time-course...
July 17, 2017: NeuroImage
https://www.readbyqxmd.com/read/28729002/phosphenes-retinal-discrete-dark-noise-negative-afterimages-and-retinogeniculate-projection-a-review-of-a-new-explanatory-framework-based-on-endogenous-ocular-luminescence
#15
REVIEW
Vahid Salari, Felix Scholkmann, Ram Lakhan Pandey Vimal, Noémi Császár, Mehdi Aslani, István Bókkon
Cellular luminescence is the emission of photons by living cells due to various biophysical and biochemical processes, mostly associated with cellular metabolism. In this review paper we summarize today's understanding of four luminescence-dependent phenomena in the eye, i.e., phosphenes, retinal discrete dark noise, negative afterimages and the development of retinogeniculate projections in the brain. We review the phenomena above in the context of knowledge gained from experimental and theoretical works. Finally we discuss this knowledge in terms of its physiological significance...
July 17, 2017: Progress in Retinal and Eye Research
https://www.readbyqxmd.com/read/28728462/increased-binding-potential-of-brain-adenosine-a-sub-1-sub-receptor-in-chronic-stages-of-patients-with-diffuse-axonal-injury-measured-with-1-methyl-sup-11-sup-c-8-dicyclopropylmethyl-1-methyl-3-propylxanthine-pet-imaging
#16
Shihori Hayashi, Motoki Inaji, Tadashi Nariai, Keiichi Oda, Muneyuki Sakata, Jun Toyohara, Kenji Ishii, Kiichi Ishiwata, Taketoshi Maehara
The positron emission tomography (PET) radioligand for adenosine A <sub>1</sub> receptor (A1R) [1-methyl- <sup>11</sup>C] 8-dicyclopropylmethyl-1-methyl-3-propylxanthine (MPDX) has recently been developed for human brain imaging. In the present study, we evaluated the alteration of the A1R in patients with diffuse axonal injury (DAI) in chronic stage <i>in vivo</i>. Ten patients with DAI (7 men and 3 women) were included in this study. Three PET examinations were sequentially performed to measure A1R binding with <sup>11</sup>C-MPDX, glucose metabolism with <sup>18</sup>F-fluorodeoxyglucose (FDG), and central benzodiazepine receptor binding with <sup>11</sup>C-flumazenil (FMZ), decreases of <sup>11</sup>C-FMZ uptake indicate neuronal loss...
July 20, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28726961/functional-single-walled-carbon-nanotubes-car-for-targeting-dopamine-delivery-into-the-brain-of-parkinsonian-mice
#17
Qing Guo, Huihui You, Xu Yang, Bencheng Lin, Zhihong Zhu, Zhisong Lu, Xiaoxiao Li, Yun Zhao, Lin Mao, Shiping Shen, Haoyan Cheng, Jiting Zhang, Lingfu Deng, Jianhua Fan, Zhuge Xi, Rui Li, Chang Ming Li
Current treatments for Parkinson's disease (PD) are limited, partly due to the difficulties posed by the blood brain barrier (BBB) when delivering drugs to the brain. Herein, we explore the feasibility and efficacy of functional single-walled carbon nanotubes 'CAR' (SWCNT-PEGs-Lf) which carry and target-deliver dopamine (DA) to the brain in PD mice for treatment. SWCNTs can penetrate the cell-membrane remarkably, with the characteristics including high drug-loading and pH-dependent therapeutic unloading capacities...
July 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28726511/how-do-probiotics-and-prebiotics-function-at-distant-sites
#18
G Reid, T Abrahamsson, M Bailey, L B Bindels, R Bubnov, K Ganguli, C Martoni, C O'Neill, H M Savignac, C Stanton, N Ship, M Surette, K Tuohy, S van Hemert
The realisation that microbes regarded as beneficial to the host can impart effects at sites distant from their habitat, has raised many possibilities for treatment of diseases. The objective of a workshop hosted in Turku, Finland, by the International Scientific Association for Probiotics and Prebiotics, was to assess the evidence for these effects and the extent to which early life microbiome programming influences how the gut microbiota communicates with distant sites. In addition, we examined how probiotics and prebiotics might affect the skin, airways, heart, brain and metabolism...
July 20, 2017: Beneficial Microbes
https://www.readbyqxmd.com/read/28726205/dipeptidyl-peptidase-4-inhibitors-diprotin-a-and-sitagliptin-administered-on-weeks-2-3-of-postnatal-development-modulate-monoamine-metabolism-in-the-striatum-of-adult-rats
#19
N N Khlebnikova, E V Orshanskaya, V B Narkevich, V S Kudrin, N A Krupina
The levels of monoamines and their metabolites in brain structures of adult (3-month-old) rats with emotional and motivational disorders induced by inhibitors of dipeptidyl peptidase 4 (DPP-4; EC 3.4.14.5) diprotin A and sitagliptin on weeks 2-3 of postnatal development (postnatal days 5-18) were studied by HPLC with electrochemical detection. A significant decrease in the level of serotonin metabolite, 5-hydroxyindoleacetic acid, and a pronounced tendency towards reduced serotonin level were detected in the striatum of rats in both study groups...
July 18, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28725988/interim-18-f-fgd-pet-ct-may-not-predict-the-outcome-in-primary-central-nervous-system-lymphoma-patients-treated-with-sequential-treatment-with-methotrexate-and-cytarabine
#20
Jae-Cheol Jo, Dok Hyun Yoon, Shin Kim, Kyoungmin Lee, Eun Hee Kang, Jung Sun Park, Jin-Sook Ryu, Jooryung Huh, Chan-Sik Park, Jong Hoon Kim, Sang Wook Lee, Cheolwon Suh
(18)F-fluoro-2-dexoy-D-glucose-positron emission tomography (PET)/computed tomography (CT) is a useful imaging technique for monitoring the treatment response in lymphoma cases. We investigated the value of interim brain PET/CT (I-PET/CT) for monitoring the response to intensive methotrexate-based chemotherapy in primary central nervous system lymphoma (PCNSL) patients with diffuse large B cell lymphoma (DLBCL). Of the 76 PCNSL patients treated with intensive methotrexate and cytarabine chemotherapy between September 2006 and December 2012, 66 patients with DLBCL were included in this study...
July 19, 2017: Annals of Hematology
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