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https://www.readbyqxmd.com/read/28102888/genetic-polymorphisms-in-estrogen-metabolic-pathway-associated-with-risks-of-alzheimer-s-disease-evidence-from-a-southern-chinese-population
#1
Lu Hua Chen, Yan Hui Fan, Patrick Yu Ping Kao, Deborah Tip Yin Ho, Joyce Cheuk Tung Ha, Leung Wing Chu, You-Qiang Song
OBJECTIVES: To investigate whether genetic variations on the estrogen metabolic pathway would be associated with risk of Alzheimer's disease (AD). DESIGN: Cross-sectional study. SETTING: Individuals were recruited at the Memory Clinic, Queen Mary Hospital, Hong Kong. PARTICIPANTS: Chinese individuals with (n = 426) and without (n = 350) AD. MEASUREMENTS: All subjects underwent a standardized cognitive assessment and genotyping of four candidate genes on the estrogen metabolic pathway (estrogen receptor α gene (ESR1), estrogen receptor β gene (ESR2), cytochrome P450 19A1 gene (CYP19A1), cytochrome P450 11A1 gene (CYP11A1))...
January 19, 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/28102468/mutation-of-the-herc-1-ubiquitin-ligase-impairs-associative-learning-in-the-lateral-amygdala
#2
Eva Mª Pérez-Villegas, José V Negrete-Díaz, Mª Elena Porras-García, Rocío Ruiz, Angel M Carrión, Antonio Rodríguez-Moreno, José A Armengol
Tambaleante (tbl/tbl) is a mutant mouse that carries a spontaneous Gly483Glu substitution in the HERC1 (HECT domain and RCC1 domain) E3 ubiquitin ligase protein (HERC1). The tbl/tbl mutant suffers an ataxic syndrome given the almost complete loss of cerebellar Purkinje cells during adult life. More recent analyses have identified alterations at neuromuscular junctions in these mice, as well as in other neurons of the central nervous system, such as motor neurons in the spinal cord, or pyramidal neurons in the hippocampal CA3 region and the neocortex...
January 19, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28102395/sesamol-ameliorates-high-fat-and-high-fructose-induced-cognitive-defects-via-improving-insulin-signaling-disruption-in-the-central-nervous-system
#3
Zhigang Liu, Yali Sun, Qinglian Qiao, Tong Zhao, Wentong Zhang, Bo Ren, Qian Liu, Xuebo Liu
Sesamol, a nutritional component from sesame, possesses antioxidant, lipid lowering and antidepressant activities. Nonetheless, few studies report its effects on high-energy-dense diet-induced cognitive loss. The present research aimed to elucidate the action of sesamol on high-fat and high-fructose (HFFD) "western"-diet-induced central nervous system insulin resistance and learning and memory impairment, and further determined the possible underlying mechanism. 3 month-old C57BL/6J mice were divided into 3 groups with/without sesamol in the drinking water (0...
January 19, 2017: Food & Function
https://www.readbyqxmd.com/read/28102362/evaluation-of-region-selective-bilirubin-induced-brain-damage-as-a-basis-for-a-pharmacological-treatment
#4
Matteo Dal Ben, Cristina Bottin, Fabrizio Zanconati, Claudio Tiribelli, Silvia Gazzin
The neurologic manifestations of neonatal hyperbilirubinemia in the central nervous system (CNS) exhibit high variations in the severity and appearance of motor, auditory and cognitive symptoms, which is suggestive of a still unexplained selective topography of bilirubin-induced damage. By applying the organotypic brain culture (OBC: preserving in vitro the cellular complexity, connection and architecture of the in vivo brain) technique to study hyperbilirubinemia, we mapped the regional target of bilirubin-induced damage, demonstrated a multifactorial toxic action of bilirubin, and used this information to evaluate the efficacy of drugs applicable to newborns to protect the brain...
January 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28102288/acetylcholine-acts-through-m3-muscarinic-receptor-to-activate-the-egfr-signaling-and-promotes-gastric-cancer-cell-proliferation
#5
Huangfei Yu, Hongwei Xia, Qiulin Tang, Huanji Xu, Guoqing Wei, Ying Chen, Xinyu Dai, Qiyong Gong, Feng Bi
Acetylcholine (ACh), known as a neurotransmitter, regulates the functions of numerous fundamental central and peripheral nervous system. Recently, emerging evidences indicate that ACh also plays an important role in tumorigenesis. However, little is known about the role of ACh in gastric cancer. Here, we reported that ACh could be auto-synthesized and released from MKN45 and BGC823 gastric cancer cells. Exogenous ACh promoted cell proliferation in a does-dependent manner. The M3R antagonist 4-DAMP, but not M1R antagonist trihexyphenidyl and M2/4 R antagonist AFDX-116, could reverse the ACh-induced cell proliferation...
January 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28101734/chondroitin-sulfates-and-their-binding-molecules-in-the-central-nervous-system
#6
REVIEW
L Djerbal, H Lortat-Jacob, Jcf Kwok
Chondroitin sulfate (CS) is the most abundant glycosaminoglycan (GAG) in the central nervous system (CNS) matrix. Its sulfation and epimerization patterns give rise to different forms of CS, which enables it to interact specifically and with a significant affinity with various signalling molecules in the matrix including growth factors, receptors and guidance molecules. These interactions control numerous biological and pathological processes, during development and in adulthood. In this review, we describe the specific interactions of different families of proteins involved in various physiological and cognitive mechanisms with CSs in CNS matrix...
January 18, 2017: Glycoconjugate Journal
https://www.readbyqxmd.com/read/28101526/rapamycin-resistant-mtor-activity-is-required-for-sensory-axon-regeneration-induced-by-a-conditioning-lesion
#7
Weitao Chen, Na Lu, Yue Ding, Yuan Wang, Leung Ting Chan, Xu Wang, Xin Gao, Songshan Jiang, Kai Liu
Neuronal mammalian target of rapamycin (mTOR) activity is a critical determinant of the intrinsic regenerative ability of mature neurons in the adult central nervous system (CNS). However, whether its action also applies to peripheral nervous system (PNS) neurons after injury remains elusive. To address this issue unambiguously, we used genetic approaches to determine the role of mTOR signaling in sensory axon regeneration in mice. We showed that deleting mTOR in dorsal root ganglion (DRG) neurons suppressed the axon regeneration induced by conditioning lesions...
November 2016: ENeuro
https://www.readbyqxmd.com/read/28101427/dynamic-imaging-and-quantitative-analysis-of-cranial-neural-tube-closure-in-the-mouse-embryo-using-optical-coherence-tomography
#8
Shang Wang, Monica D Garcia, Andrew L Lopez, Paul A Overbeek, Kirill V Larin, Irina V Larina
Neural tube closure is a critical feature of central nervous system morphogenesis during embryonic development. Failure of this process leads to neural tube defects, one of the most common forms of human congenital defects. Although molecular and genetic studies in model organisms have provided insights into the genes and proteins that are required for normal neural tube development, complications associated with live imaging of neural tube closure in mammals limit efficient morphological analyses. Here, we report the use of optical coherence tomography (OCT) for dynamic imaging and quantitative assessment of cranial neural tube closure in live mouse embryos in culture...
January 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28101364/hemodynamic-effects-of-electrical-muscle-stimulation-in-the-prophylaxis-of-deep-vein-thrombosis-for-intensive-care-unit-patients-a-randomized-trial
#9
Masahiro Ojima, Ryosuke Takegawa, Tomoya Hirose, Mitsuo Ohnishi, Tadahiko Shiozaki, Takeshi Shimazu
BACKGROUND: Deep vein thrombosis (DVT) is a major complication in critical care. There are various methods of prophylaxis, but none of them fully prevent DVT, and each method has adverse effects. Electrical muscle stimulation (EMS) could be a new effective approach to prevent DVT in intensive care unit (ICU) patients. We hypothesized that EMS increases the venous flow of the lower limbs and has a prophylactic effect against the formation of DVT. METHODS: This study included 26 patients admitted to a single ICU...
2017: Journal of Intensive Care
https://www.readbyqxmd.com/read/28100923/reductions-in-central-arterial-compliance-with-age-are-related-to-sympathetic-vasoconstrictor-nerve-activity-in-healthy-men
#10
Hirofumi Tanaka, Frank A Dinenno, Douglas R Seals
The compliance of large elastic arteries in the cardiothoracic circulation declines, whereas sympathetic nervous system activity increases markedly with advancing age in adult humans. We tested the hypothesis that the reduction in compliance of the large elastic arteries with age is associated with elevations in sympathetic tone to vascular smooth muscle in 16 young and 17 older adults. Carotid arterial compliance (via ultrasonography) was 45% lower in healthy older compared with young men (P<0.001), and was inversely related to sympathetic nerve activity (via microneurography) (r=-0...
January 19, 2017: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/28100843/pathophysiology-and-molecular-basis-of-selected-metabolic-abnormalities-in-huntington-s-disease
#11
Jolanta Krzysztoń-Russjan
Huntington's disease (HD) is an incurable, devastating neurodegenerative disease with a known genetic background and autosomally dominant inheritance pattern. HTT gene mutation (mHTT) is associated with polymorphic fragment elongation above 35 repeats of the CAG triplet. The mHTT product is an altered protein with a poly-Q elongated fragment, with the highest expression determined in the central nervous system (CNS) and with differentiated expression outside the CNS. A drastic loss of striatal and deeper layers of the cerebral cortex neurons was determined in the CNS, but muscle and body weight mass loss with dysfunction of many organs was also observed...
December 30, 2016: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28100779/intramembrane-proteolysis-of-astrotactins
#12
Hao Chang, Philip M Smallwood, John Williams, Jeremy Nathans
Astrotactins are vertebrate-specific membrane proteins implicated in neuron-glia interactions during central nervous system development and in hair follicle polarity during skin development. By studying epitope-tagged derivatives of mouse Astrotactin2 (Astn2) produced in transfected cells, we determined that the amino- and carboxy-termini reside in the extracellular space and are initially linked by two transmembrane segments and a single cytoplasmic domain. We further show that Astn2 undergoes proteolytic cleavage in the second transmembrane domain (TM2) and that a disulfide bond holds the resulting two fragments together...
January 18, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28100653/minocycline-blocks-glial-cell-activation-and-ventilatory-acclimatization-to-hypoxia
#13
Jennifer Ann Stokes, Tara Elizabeth Arbogast, Esteban A Moya, Zhenxing Fu, Frank L Powell
Ventilatory acclimatization to hypoxia (VAH) is the time-dependent increase in ventilation, which persists upon return to normoxia, and involves plasticity in both central nervous system respiratory centers and peripheral chemoreceptors. We investigated the role of glial cells in VAH in male Sprague Dawley rats using minocycline, an antibiotic that inhibits microglia activation and has anti-inflammatory properties, and barometric pressure plethysmography to measure ventilation. Rats received either minocycline (45mg/kg, i...
January 18, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28100454/gene-therapy-targeting-oligodendrocytes-provides-therapeutic-benefit-in-a-leukodystrophy-model
#14
Elena Georgiou, Kyriaki Sidiropoulou, Jan Richter, Christos Papaneophytou, Irene Sargiannidou, Alexia Kagiava, Georg von Jonquieres, Christina Christodoulou, Matthias Klugmann, Kleopas A Kleopa
Pelizaeus-Merzbacher-like disease or hypomyelinating leukodystrophy-2 is an autosomal recessively inherited leukodystrophy with childhood onset resulting from mutations in the gene encoding the gap junction protein connexin 47 (Cx47, encoded by GJC2). Cx47 is expressed specifically in oligodendrocytes and is crucial for gap junctional communication throughout the central nervous system. Previous studies confirmed that a cell autonomous loss-of-function mechanism underlies hypomyelinating leukodystrophy-2 and that transgenic oligodendrocyte-specific expression of another connexin, Cx32 (GJB1), can restore gap junctions in oligodendrocytes to achieve correction of the pathology in a disease model...
January 18, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28099558/the-mortality-rate-after-hospital-discharge-in-patients-with-myelomeningocele-decreased-after-implementation-of-mandatory-flour-fortification-with-folic-acid
#15
Renato Manganelli Salomão, Tatiana Protzenko Cervante, José Francisco Manganelli Salomão, Soniza Vieira Alves Leon
Objective: To evaluate the mandatory folic acid fortification of flour on mortality rates after the hospital discharge of children born with myelomeningocele, the most affected age group and the most frequent cause of death. Methods: A retrospective study of 383 children born with myelomeningocele from January 1990 to December 2013 in a high-fetal-risk reference hospital. Results: A total of 39 patients died (10.1%),of which 23 (6%) died after discharge...
January 2017: Arquivos de Neuro-psiquiatria
https://www.readbyqxmd.com/read/28099463/the-differential-effects-of-anesthetics-on-bacterial-behaviors
#16
Matthew Chamberlain, Sophia Koutsogiannaki, Matthew Schaefers, Hasan Babazada, Renyu Liu, Koichi Yuki
Volatile anesthetics have been in clinical use for a long period of time and are considered to be promiscuous by presumably interacting with several ion channels in the central nervous system to produce anesthesia. Because ion channels and their existing evolutionary analogues, ion transporters, are very important in various organisms, it is possible that volatile anesthetics may affect some bacteria. In this study, we hypothesized that volatile anesthetics could affect bacterial behaviors. We evaluated the impact of anesthetics on bacterial growth, motility (swimming and gliding) and biofilm formation of four common bacterial pathogens in vitro...
2017: PloS One
https://www.readbyqxmd.com/read/28099414/neurotoxic-reactive-astrocytes-are-induced-by-activated-microglia
#17
Shane A Liddelow, Kevin A Guttenplan, Laura E Clarke, Frederick C Bennett, Christopher J Bohlen, Lucas Schirmer, Mariko L Bennett, Alexandra E Münch, Won-Suk Chung, Todd C Peterson, Daniel K Wilton, Arnaud Frouin, Brooke A Napier, Nikhil Panicker, Manoj Kumar, Marion S Buckwalter, David H Rowitch, Valina L Dawson, Ted M Dawson, Beth Stevens, Ben A Barres
Reactive astrocytes are strongly induced by central nervous system (CNS) injury and disease, but their role is poorly understood. Here we show that a subtype of reactive astrocytes, which we termed A1, is induced by classically activated neuroinflammatory microglia. We show that activated microglia induce A1 astrocytes by secreting Il-1α, TNF and C1q, and that these cytokines together are necessary and sufficient to induce A1 astrocytes. A1 astrocytes lose the ability to promote neuronal survival, outgrowth, synaptogenesis and phagocytosis, and induce the death of neurons and oligodendrocytes...
January 18, 2017: Nature
https://www.readbyqxmd.com/read/28099138/role-of-glial-cell-line-derived-neurotrophic-factor-in-the-pathogenesis-and-treatment-of-mood-disorders
#18
Anton S Tsybko, Tatiana V Ilchibaeva, Nina K Popova
Glial cell line-derived neurotrophic factor (GDNF) is widely recognized as a survival factor for dopaminergic neurons, but GDNF has also been shown to promote development, differentiation, and protection of other central nervous system neurons and was thought to play an important role in various neuropsychiatric disorders. Severe mood disorders, such as primarily major depressive disorder and bipolar affective disorder, attract particular attention. These psychopathologies are characterized by structural alterations accompanied by the dysregulation of neuroprotective and neurotrophic signaling mechanisms required for the maturation, growth, and survival of neurons and glia...
January 18, 2017: Reviews in the Neurosciences
https://www.readbyqxmd.com/read/28098958/perilesional-hyperintensity-on-t1-weighted-images-in-intra-axial-brain-masses-other-than-cavernous-malformations
#19
S Ali Nabavizadeh, Dasha Pechersky, J Eric Schmitt, MacLean Nasrallah, Ronald Wolf, Laurie Loevner, Alexander C Mamourian
BACKGROUND AND PURPOSE: Hyperintensity on T1-weighted imaging in perilesional vasogenic edema has been reported as a useful sign for differentiating cavernous malformation from other hemorrhagic intra-axial masses. In this study, we investigated the frequency of perilesional hyperintensity on T1-weighted imaging in patients with intra-axial hemorrhagic and nonhemorrhagic brain masses. METHODS: The study was performed with the approval of the institutional review board...
January 18, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28098881/overexpression-of-grp75-inhibits-inflammation-in-a-rat-model-of-intracerebral-hemorrhage
#20
Lian-Jie Lv, Jia Li, Hai-Bo Qiao, Ben-Jin Nie, Peng Lu, Feng Xue, Zhi-Ming Zhang
Glucose‑regulated protein 75 (GRP75) is a member of the heat shock protein 70 family and previous studies have demonstrated that GRP75 is involved in diseases of the central nervous system. However, the biological function of GRP75 in intracerebral hemorrhage (ICH) remains to be clarified. Thus, the aim of the present study was to evaluate the effects of GRP75 in a rat model of ICH. Western blotting was used to detect the protein expression of GRP75, active caspase‑3, Bax, Bcl‑2, p‑Akt and Akt in brain tissues following ICH...
January 17, 2017: Molecular Medicine Reports
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