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https://www.readbyqxmd.com/read/28431434/bright-light-suppresses-form-deprivation-myopia-development-with-activation-of-dopamine-d1-receptor-signaling-in-the-on-pathway-in-retina
#1
Si Chen, Zhina Zhi, Qingqing Ruan, Qingxia Liu, Fen Li, Fen Wan, Peter S Reinach, Jiangfan Chen, Jia Qu, Xiangtian Zhou
Purpose: To determine whether dopamine receptor D1 (D1R) signaling pathway activation by bright light (BL) in specific retinal neuronal cell types contributes to inhibiting form-deprivation myopia (FDM) in mice. Methods: Mice (3-weeks old) were raised under either normal light (NL: 100-200 lux) or BL (2500-5000 lux) conditions with or without form deprivation. Refraction changes were evaluated with an eccentric infrared photorefractor, and ocular axial components with optical coherence tomography...
April 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28427565/analyzing-the-effect-of-v66m-mutation-in-bdnf-in-causing-mood-disorders-a-computational-approach
#2
P Sneha, D Thirumal Kumar, Sugandhi Saini, Kreeti Kajal, R Magesh, R Siva, C George Priya Doss
Mental disorders or mood disorders are prevalent globally irrespective of region, race, and ethnic groups. Of the types of mood disorders, major depressive disorder (MDD) and bipolar disorder (BPD) are the most prevalent forms of psychiatric condition. A number of preclinical studies emphasize the essential role of brain-derived neurotrophic factor (BDNF) in the pathophysiology of mood disorders. Additionally, BDNF is the most common growth factor in the central nervous system along with their essential role during the neural development and the synaptic elasticity...
2017: Advances in Protein Chemistry and Structural Biology
https://www.readbyqxmd.com/read/28426817/evaluation-of-machine-learning-algorithms-and-structural-features-for-optimal-mri-based-diagnostic-prediction-in-psychosis
#3
Raymond Salvador, Joaquim Radua, Erick J Canales-Rodríguez, Aleix Solanes, Salvador Sarró, José M Goikolea, Alicia Valiente, Gemma C Monté, María Del Carmen Natividad, Amalia Guerrero-Pedraza, Noemí Moro, Paloma Fernández-Corcuera, Benedikt L Amann, Teresa Maristany, Eduard Vieta, Peter J McKenna, Edith Pomarol-Clotet
A relatively large number of studies have investigated the power of structural magnetic resonance imaging (sMRI) data to discriminate patients with schizophrenia from healthy controls. However, very few of them have also included patients with bipolar disorder, allowing the clinically relevant discrimination between both psychotic diagnostics. To assess the efficacy of sMRI data for diagnostic prediction in psychosis we objectively evaluated the discriminative power of a wide range of commonly used machine learning algorithms (ridge, lasso, elastic net and L0 norm regularized logistic regressions, a support vector classifier, regularized discriminant analysis, random forests and a Gaussian process classifier) on main sMRI features including grey and white matter voxel-based morphometry (VBM), vertex-based cortical thickness and volume, region of interest volumetric measures and wavelet-based morphometry (WBM) maps...
2017: PloS One
https://www.readbyqxmd.com/read/28419606/stratified-polygenic-risk-prediction-model-with-application-to-cagi-bipolar-disorder-sequencing-data
#4
Maggie Haitian Wang, Billy Chang, Rui Sun, Inchi Hu, Xiaoxuan Xia, William Ka Kei Wu, Ka Chun Chong, Benny Chung-Ying Zee
Genetic data consists of a wide range of marker types, including common, low frequency, and rare variants. Multiple genetic markers and their interactions play central roles in the heritability of complex disease. In this study, we propose an algorithm that uses a stratified variable selection design by genetic architectures and interaction effects, achieved by a data-set adaptive W-test. The polygenic sets in all strata were integrated to form a classification rule. The algorithm was applied to the Critical Assessment of Genome Interpretation 4 bipolar challenge sequencing data...
April 17, 2017: Human Mutation
https://www.readbyqxmd.com/read/28411477/comparative-surface-energetic-study-of-matrigel-%C3%A2-and-collagen-i-interactions-with-endothelial-cells
#5
Michael J Hill, Debanjan Sarkar
Understanding of the surface energetic aspects of the spontaneously deposited proteins on biomaterial surfaces and how this influences cell adhesion and differentiation is an area of regenerative medicine that has not received adequate attention. Current controversies surround the role of the biomaterial substratum surface chemistry, the range of influence of said substratum, and the effects of different surface energy components of the protein interface. Endothelial cells (ECs) are a highly important cell type for regenerative medicine applications, such as tissue engineering, and In-vivo they interact with collagen I based stromal tissue and basement membranes producing different behavioral outcomes...
April 4, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28406945/predicting-3d-lip-shapes-using-facial-surface-emg
#6
Merijn Eskes, Maarten J A van Alphen, Alfons J M Balm, Ludi E Smeele, Dieta Brandsma, Ferdinand van der Heijden
AIM: The aim of this study is to prove that facial surface electromyography (sEMG) conveys sufficient information to predict 3D lip shapes. High sEMG predictive accuracy implies we could train a neural control model for activation of biomechanical models by simultaneously recording sEMG signals and their associated motions. MATERIALS AND METHODS: With a stereo camera set-up, we recorded 3D lip shapes and simultaneously performed sEMG measurements of the facial muscles, applying principal component analysis (PCA) and a modified general regression neural network (GRNN) to link the sEMG measurements to 3D lip shapes...
2017: PloS One
https://www.readbyqxmd.com/read/28406662/explicit-and-implicit-reinforcement-learning-across-the-psychosis-spectrum
#7
Deanna M Barch, Cameron S Carter, James M Gold, Sheri L Johnson, Ann M Kring, Angus W MacDonald, Diego A Pizzagalli, J Daniel Ragland, Steven M Silverstein, Milton E Strauss
Motivational and hedonic impairments are core features of a variety of types of psychopathology. An important aspect of motivational function is reinforcement learning (RL), including implicit (i.e., outside of conscious awareness) and explicit (i.e., including explicit representations about potential reward associations) learning, as well as both positive reinforcement (learning about actions that lead to reward) and punishment (learning to avoid actions that lead to loss). Here we present data from paradigms designed to assess both positive and negative components of both implicit and explicit RL, examine performance on each of these tasks among individuals with schizophrenia, schizoaffective disorder, and bipolar disorder with psychosis, and examine their relative relationships to specific symptom domains transdiagnostically...
April 13, 2017: Journal of Abnormal Psychology
https://www.readbyqxmd.com/read/28399092/-the-affective-pathology-in-patients-with-adolescent-bulimia-nervosa
#8
V V Grachev
AIM: To investigate affective pathology in patients with adolescent bulimia nervosa (BN) and to analyze comorbid mutual influences of these clinical entities. MATERIAL AND METHODS: A sample consisted of 52 young female patients, aged from 13.9 to 17.4 years, who simultaneously meet ICD-10 criteria of F50.2 - typical BN and F30-F39 - mood disorders. The Eating Attitudes Test (EAT-26) and the Beck Depression Inventory were used for psychometric assessment. Duration of follow-up ranged from 1 to 7 years...
2017: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/28398341/the-cacna1c-risk-allele-rs1006737-is-associated-with-age-related-prefrontal-cortical-thinning-in-bipolar-i-disorder
#9
M G Soeiro-de-Souza, B Lafer, R A Moreno, F G Nery, T Chile, K Chaim, C da Costa Leite, R Machado-Vieira, M C G Otaduy, H Vallada
Calcium channels control the inflow of calcium ions into cells and are involved in diverse cellular functions. The CACNA1C gene polymorphism rs1006737 A allele has been strongly associated with increased risk for bipolar disorder (BD) and with modulation of brain morphology. The medial prefrontal cortex (mPFC) has been widely associated with mood regulation in BD, but the role of this CACNA1C polymorphism in mPFC morphology and brain aging has yet to be elucidated. One hundred seventeen euthymic BD type I subjects were genotyped for CACNA1C rs1006737 and underwent 3 T three-dimensional structural magnetic resonance imaging scans to determine cortical thickness of mPFC components (superior frontal cortex (sFC), medial orbitofrontal cortex (mOFC), caudal anterior cingulate cortex (cACC) and rostral anterior cingulate cortex (rACC))...
April 11, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28397069/licl-treatment-induces-programmed-cell-death-of-schwannoma-cells-through-akt-and-mtor-mediated-necroptosis
#10
Ying Wang, Qi Zhang, Bo Wang, Peng Li, Pinan Liu
Lithium is considered a first-line therapy for the treatment of bipolar disorder and was recently shown to be associated with a reduced overall cancer risk. A growing body of evidence has indicated the potential antitumor benefits of this drug. Lithium likely functions as an antitumor agent. In this study, we found that lithium chloride (LiCl) significantly inhibits the proliferation of both RT4 cells and human NF2-associated primary schwannoma cells by inhibiting the expression of apoptosis-related proteins...
April 10, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28393474/application-of-ipscs-to-understand-neurobiological-basis-of-bipolar-disorder-and-schizophrenia
#11
Yao-Nan Liu, Si-Yao Lu, Jun Yao
The etiology of neuropsychiatric disorders such as schizophrenia and bipolar disorder usually involves complex combinations of genetic defects/variations and environmental impacts, which hindered, for a long time, research efforts based on animal models and patients' non-neuronal cells or postmortem tissues. However, the development of human induced pluripotent stem cell technology by the Yamanaka group was immediately applied to establish cell research models for neuronal disorders. Since then, techniques to achieve highly efficient differentiation of different types of neural cells following iPSC modeling have made much progress...
April 10, 2017: Psychiatry and Clinical Neurosciences
https://www.readbyqxmd.com/read/28392359/intracranial-self-stimulation-reward-induces-neurite-extension-in-pc12m3-cells-and-activation-of-the-p38-mapk-pathway
#12
Yutaka Gomita, Satoru Esumi, Naoya Sugiyama, Yoshihisa Kitamura, Yoshihisa Koike, Hirotoshi Motoda, Toshiaki Sendo, Yoshio Kano
Factors that trigger emotional expression may be divided into two patterns according to the type of motivation, acquiring reward (pleasure) and avoiding aversion (punishment). Repeated exposure to certain external stimuli accompanied by aberrant motivation may produce psychiatric diseases such as bipolar disorder and addiction via dysregulation of the central nervous system. However, neurobiological underpinnings of such diseases have not been clarified, especially at the neuronal level. In the present study, plasma from rats undergoing intracranial self-stimulation (ICSS) produced neurite outgrowth in PC12-variant cells (PC12m3)...
April 6, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28391185/bipolar-microsecond-pulses-and-insulated-needle-electrodes-for-reducing-muscle-contractions-during-irreversible-electroporation
#13
Chenguo Yao, Shoulong Dong, Yajun Zhao, Yanpeng Lv, Hongmei Liu, Lingyu Gong, Jianhao Ma, Haifeng Wang, Yinghao Sun
To minimize the effect of muscle contractions during irreversible electroporation (IRE), this paper attempts to research the ablation effect and muscle contractions by applying high-frequency irreversible electroporation (H-FIRE) ablation to liver tissue in vivo. METHODS: Insulated needle electrode was designed by painting insulating-coating on the outer surface of the needle electrode tip. Series experiments were conducted using insulated needle electrodes and traditional needle electrodes to apply H-FIRE pulses and traditional monopolar IRE pulses to rabbit liver tissues...
April 4, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28386219/ncam-regulates-inhibition-and-excitability-in-layer-2-3-pyramidal-cells-of-anterior-cingulate-cortex
#14
Xuying Zhang, Chelsea S Sullivan, Megan B Kratz, Michael R Kasten, Patricia F Maness, Paul B Manis
The neural cell adhesion molecule (NCAM), has been shown to be an obligate regulator of synaptic stability and pruning during critical periods of cortical maturation. However, the functional consequences of NCAM deletion on the organization of inhibitory circuits in cortex are not known. In vesicular gamma-amino butyric acid (GABA) transporter (VGAT)-channelrhodopsin2 (ChR2)-enhanced yellow fluorescent protein (EYFP) transgenic mice, NCAM is expressed postnatally at perisomatic synaptic puncta of EYFP-labeled parvalbumin, somatostatin and calretinin-positive interneurons, and in the neuropil in the anterior cingulate cortex (ACC)...
2017: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/28384714/organotypic-cultures-of-adult-mouse-retina-morphologic-changes-and-gene-expression
#15
Brigitte Müller, Franziska Wagner, Birgit Lorenz, Knut Stieger
Purpose: The purpose of this study was characterization of adult murine neuroretina in organ culture to investigate its suitability for use in preclinical therapeutic applications. In retinal disorders, neurodegeneration of mature retinal cells takes place. Therefore, neonatal retina cultures are not adequate for therapeutic applications, such as genome editing, as the retina is still developing with cells dividing and differentiating into highly specialized cell types such as photoreceptors...
April 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28382556/acute-progressive-paravascular-placoid-neuroretinopathy-with-negative-type-electroretinography-in-paraneoplastic-retinopathy
#16
Fred K Chen, Avenell L Chew, Dan Zhang, Shang-Chih Chen, Enid Chelva, Erandi Chandrasekera, Eleanor M H Koay, John Forrester, Samuel McLenachan
PURPOSE: Paraneoplastic retinopathy can be the first manifestation of systemic malignancy. A subset of paraneoplastic retinopathy is characterized by negative-type electroretinography (ERG) without fundus abnormality. Here we describe the multimodal imaging and clinico-pathological correlation of a unique case of acute progressive paravascular placoid neuroretinopathy with suspected retinal depolarizing bipolar cell dysfunction preceding the diagnosis of metastatic small cell carcinoma of the prostate...
April 5, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28376926/cancer-and-central-nervous-system-disorders-protocol-for-an-umbrella-review-of-systematic-reviews-and-updated-meta-analyses-of-observational-studies
#17
Ferrán Catalá-López, Brian Hutton, Jane A Driver, Matthew J Page, Manuel Ridao, José M Valderas, Adolfo Alonso-Arroyo, Jaume Forés-Martos, Salvador Martínez, Ricard Gènova-Maleras, Diego Macías-Saint-Gerons, Benedicto Crespo-Facorro, Eduard Vieta, Alfonso Valencia, Rafael Tabarés-Seisdedos
BACKGROUND: The objective of this study will be to synthesize the epidemiological evidence and evaluate the validity of the associations between central nervous system disorders and the risk of developing or dying from cancer. METHODS/DESIGN: We will perform an umbrella review of systematic reviews and conduct updated meta-analyses of observational studies (cohort and case-control) investigating the association between central nervous system disorders and the risk of developing or dying from any cancer or specific types of cancer...
April 4, 2017: Systematic Reviews
https://www.readbyqxmd.com/read/28373806/serum-brain-derived-neurotrophic-factor-levels-among-euthymic-adolescents-with-bipolar-disorder-type-i
#18
Nagihan Cevher Binici, Fatma Neslihan Inal Emiroğlu, Halil Resmi, Hülya Ellidokuz
INTRODUCTION: Bipolar disorder (BD) has been increasingly associated with abnormalities in neuroplasticity and cellular resilience in brain regions that are involved in mood and that affect regulation. Brain-derived neurotrophic factor (BDNF) is a member of the neurotrophin family that regulates neuroplasticity. The aims of the current study were to compare serum BDNF levels in euthymic adolescents with BD type I with those in controls and to investigate the relationship between clinical variables and serum BDNF levels in adolescents with BD type I...
September 2016: Noro Psikiyatri Arsivi
https://www.readbyqxmd.com/read/28373392/deafferented-adult-rod-bipolar-cells-create-new-synapses-with-photoreceptors-to-restore-vision
#19
Corinne Beier, Anahit Hovhannisyan, Sydney Weiser, Jennifer Kung, Seungjun Lee, Dae Yeong Lee, Philip Huie, Roopa Dalal, Daniel Palanker, Alexander Sher
Upon degeneration of photoreceptors in the adult retina, interneurons, including bipolar cells, exhibit a plastic response leading to their aberrant rewiring. Photoreceptor reintroduction has been suggested as a potential approach to sight restoration, but the ability of deafferented bipolar cells to establish functional synapses with photoreceptors is poorly understood. Here we use photocoagulation to selectively destroy photoreceptors in adult rabbits, while preserving the inner retina. We find that rods and cones shift into the ablation zone over several weeks, reducing the blind spot at scotopic and photopic luminances...
April 3, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28370454/direct-free-carrier-photogeneration-in-single-layer-and-stacked-organic-photovoltaic-devices
#20
Hrisheekesh Thachoth Chandran, Tsz-Wai Ng, Yishu Foo, Ho-Wa Li, Jian Qing, Xiao-Ke Liu, Chiu-Yee Chan, Fu-Lung Wong, Juan Antonio Zapien, Sai-Wing Tsang, Ming-Fai Lo, Chun-Sing Lee
High performance organic photovoltaic devices typically rely on type-II P/N junctions for assisting exciton dissociation. Heremans and co-workers recently reported a high efficiency device with a third organic layer which is spatially separated from the active P/N junction; but still contributes to the carrier generation by passing its energy to the P/N junction via a long-range exciton energy transfer mechanism. In this study the authors show that there is an additional mechanism contributing to the high efficiency...
April 3, 2017: Advanced Materials
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