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https://www.readbyqxmd.com/read/27906424/s100b-in-serum-and-saliva-a-valid-invasive-or-non-invasive-biomarker-in-obstructive-sleep-apnea
#1
M Traxdorf, O Wendler, K Tziridis, J Bauer, C Scherl
OBJECTIVE:   The aim of this prospective study was to determine whether serum or saliva S100B could be established as an invasive or non-invasive biomarker of cerebrovascular stress due to chronic intermittent hypoxia in obstructive sleep apnea (OSA). PATIENTS AND METHODS: S100B levels in serum and saliva were measured by an enzyme-linked immunosorbent assay (ELISA) in 40 patients with polysomnographically confirmed OSA (n=34) or ronchopathy (n=6) and 20 control subjects (n=20)...
November 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27903281/improving-the-clinical-management-of-traumatic-brain-injury-through-the-pharmacokinetic-modeling-of-peripheral-blood-biomarkers
#2
Aaron Dadas, Jolewis Washington, Nicola Marchi, Damir Janigro
BACKGROUND: Blood biomarkers of neurovascular damage are used clinically to diagnose the presence severity or absence of neurological diseases, but data interpretation is confounded by a limited understanding of their dependence on variables other than the disease condition itself. These include half-life in blood, molecular weight, and marker-specific biophysical properties, as well as the effects of glomerular filtration, age, gender, and ethnicity. To study these factors, and to provide a method for markers' analyses, we developed a kinetic model that allows the integrated interpretation of these properties...
November 30, 2016: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/27882497/soluble-tlr2-and-4-concentrations-in-cerebrospinal-fluid-in-hiv-siv-related-neuropathological-conditions
#3
Khutso M Mothapo, J Ten Oever, P Koopmans, F F Stelma, S Burm, J Bajramovic, M M Verbeek, M G Olde Rikkert, M G Netea, G Koopman, A J van der Ven
HIV in the central nervous system (CNS) mainly infects microglial cells which are known to express toll-like receptors (TLRs). This paper aimed to study the role of soluble TLR2 (sTLR2), sTLR4, and other inflammatory markers in cerebrospinal fluid (CSF) in HIV/Simian immunodeficiency virus (SIV)-related neurological sequelae. We determined sTLR2 and sTLR4 levels in CSF and serum/plasma of SIV-infected rhesus macaques with and without neurological sequelae, as well as in HIV-infected patients with and without cognitive impairments and Alzheimer's disease (AD) patients and matched controls...
November 23, 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27870504/chronic-licl-pretreatment-suppresses-thrombin-stimulated-intracellular-calcium-mobilization-through-trpc3-in-astroglioma-cells
#4
Takuji Uemura, Marty Green, Jerry J Warsh
OBJECTIVES: Transient receptor potential canonical type 3 (TRPC3) channels are activated in B lymphoblast cell lines from patients with bipolar disorder (BD), and its expression is reduced by chronic lithium treatment, implicating TRPC3 in the intracellular calcium (Ca(2+) ) dyshomeostasis of BD. Thrombin, via a protease-activated receptor, moderates Ca(2+) signaling and TRPC3 in astrocytes, and also cell proliferation. We examined whether lithium pretreatment attenuates thrombin-stimulated TRPC3 expression and function in astrocytes, and levels of the calcium-binding peptide, S100B, which is expressed mainly in these cells...
November 2016: Bipolar Disorders
https://www.readbyqxmd.com/read/27863321/cognitive-dysfunction-correlates-with-elevated-serum-s100b-concentration-in-drug-free-acutely-relapsed-patients-with-schizophrenia
#5
Song Chen, Li Tian, Nan Chen, Meihong Xiu, Zhiren Wang, Guigang Yang, Chuanyue Wang, Fude Yang, Yunlong Tan
S100B, a biomarker of glial dysfunction and blood-brain barrier (BBB) disruption, has been proposed to be involved in the pathophysiology of schizophrenia. In the present study, we aimed at exploring the association of serum S100B levels with cognitive deficits using MATRICS Consensus Cognitive Battery (MCCB) in schizophrenia, by excluding the impact of antipsychotics. Sixty-two unmedicated patients with schizophrenia during their acute phases were divided into a drug-naïve group (n=34) and a drug-free group (n=28)...
September 22, 2016: Psychiatry Research
https://www.readbyqxmd.com/read/27861869/s100b%C3%A2-%C3%A2-a1-celisa-a-novel-potency-assay-and-screening-tool-for-redifferentiation-stimuli-of-human-articular-chondrocytes
#6
Jose Diaz-Romero, Sibylle Kürsener, Sandro Kohl, Dobrila Nesic
During monolayer expansion, a necessary step in autologous chondrocyte implantation, human articular chondrocytes (HAC) dedifferentiate and lose their capacity to produce stable hyaline cartilage. Determining HAC potency and learning how to trigger their redifferentiation would improve cell-based cartilage regeneration therapies. We previously identified S100B and S100A1 proteins as markers of HAC redifferentiation potential. Here, we aimed to: (i) demonstrate a correlation between S100B + A1-positive HAC in monolayer culture and their neochondrogenesis capacity in pellet culture; (ii) develop an S100B + A1 cell-based ELISA, and (iii) prove that S100B + A1 induction in HAC increases their chondrogenic capacity...
November 11, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27853253/generation-of-metastatic-melanoma-specific-antibodies-by-affinity-purification
#7
Birgit Schütz, Anita Koppensteiner, David Schörghofer, Katharina Kinslechner, Gerald Timelthaler, Robert Eferl, Markus Hengstschläger, Albert Missbichler, Harald Hundsberger, Mario Mikula
Melanoma is the most aggressive type of skin cancer and one of the most frequent tumours in young adults. Identification of primary tumours prone to develop metastasis is of paramount importance for further patient stratification. However, till today, no markers exist that are routinely used to predict melanoma progression. To ameliorate this problem, we generated antiserum directed against metastatic melanoma tissue lysate and applied a novel approach to purify the obtained serum via consecutive affinity chromatography steps...
November 17, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27847933/the-role-of-s100b-protein-as-a-potential-marker-in-affective-disorders
#8
REVIEW
Aleksandra Rajewska-Rager, Magdalena Pawlaczyk
INTRODUCTION: Both recurrent depressive disorders and affective bipolar disorders are characterized by the changes in glial tissue. S100B protein is a calcium-binding molecule, mainly secreted by glial cells, which, depending on its concentration, has a trophic or toxic effect on neuronal cells. In the recent years, due to the postulated glial hypothesis of affective disorders and the ideas concerning brain neuroplasticity, there has been a growing interest in S100B protein and its role in affective disorders...
2016: Psychiatria Polska
https://www.readbyqxmd.com/read/27834852/tonsil-derived-mesenchymal-stem-cells-differentiate-into-a-schwann-cell-phenotype-and-promote-peripheral-nerve-regeneration
#9
Namhee Jung, Saeyoung Park, Yoonyoung Choi, Joo-Won Park, Young Bin Hong, Hyun Ho Choi Park, Yeonsil Yu, Geon Kwak, Han Su Kim, Kyung-Ha Ryu, Jae Kwang Kim, Inho Jo, Byung-Ok Choi, Sung-Chul Jung
Schwann cells (SCs), which produce neurotropic factors and adhesive molecules, have been reported previously to contribute to structural support and guidance during axonal regeneration; therefore, they are potentially a crucial target in the restoration of injured nervous tissues. Autologous SC transplantation has been performed and has shown promising clinical results for treating nerve injuries and donor site morbidity, and insufficient production of the cells have been considered as a major issue. Here, we performed differentiation of tonsil-derived mesenchymal stem cells (T-MSCs) into SC-like cells (T-MSC-SCs), to evaluate T-MSC-SCs as an alternative to SCs...
November 9, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27829338/electrochemical-biosensor-for-detection-of-glycated-albumin
#10
Edyta Mikuła, Aleksandra Wysłouch-Cieszyńska, Liliya Zhukova, Peter Verwilst, Wim Dehaen, Jerzy Radecki, Hanna Radecka
This paper presents an electrochemical biosensor based on a thiol derivative of a pentetic acid (DPTA) complex with Cu (II) created on a gold electrode surface. His-tagged domains of Receptors for Advanced Glycation End Products (RAGE) have been applied as an analytical active element for the determination of the glycated albumin. DPTA-Cu(II) complex molecules play a double role. They are sites for covalent immobilization of His6- RAGE domains, as well as transducers of the analytical signal. The binding of glycated albumin by His6- RAGE domains causes a variation in the electrochemical properties of the Cu(II) redox centers tethered to the electrode surface...
November 8, 2016: Current Alzheimer Research
https://www.readbyqxmd.com/read/27819296/serum-neurofilament-light-protein-predicts-clinical-outcome-in-traumatic-brain-injury
#11
Pashtun Shahim, Magnus Gren, Victor Liman, Ulf Andreasson, Niklas Norgren, Yelverton Tegner, Niklas Mattsson, Niels Andreasen, Martin Öst, Henrik Zetterberg, Bengt Nellgård, Kaj Blennow
Axonal white matter injury is believed to be a major determinant of adverse outcomes following traumatic brain injury (TBI). We hypothesized that measurement of neurofilament light protein (NF-L), a protein found in long white-matter axons, in blood samples, may serve as a suitable biomarker for neuronal damage in TBI patients. To test our hypotheses, we designed a study in two parts: i) we developed an immunoassay based on Single molecule array technology for quantification of NF-L in blood, and ii) in a proof-of-concept study, we tested our newly developed method on serial serum samples from severe TBI (sTBI) patients (n = 72) and controls (n = 35)...
November 7, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27819158/diagnostic-and-prognostic-significance-of-neurofilament-light-chain-nf-l-but-not-progranulin-and-s100b-in-the-course-of-amyotrophic-lateral-sclerosis-data-from-the-german-mnd-net
#12
Petra Steinacker, André Huss, Benjamin Mayer, Torsten Grehl, Julian Grosskreutz, Guntram Borck, Jens Kuhle, Dorothée Lulé, Thomas Meyer, Patrick Oeckl, Susanne Petri, Jochen Weishaupt, Albert C Ludolph, Markus Otto
There is a need for diagnostic, prognostic, and monitoring blood biomarkers for ALS. We aimed to analyse and compare proposed candidate markers for disease progression in the course of ALS. Blood samples were taken from 125 ALS patients, including nine patients with C9orf72 or SOD1 mutation, at regular intervals of six months. ALS patients were characterized by the ALS functional rating scale (ALSFRS-R) and the Edinburgh Cognitive and Behavioural ALS Screen (ECAS). We quantified neurofilament light chain (NF-L), S100B, and progranulin (PGRN) and analysed it in relation to disease progression...
November 5, 2016: Amyotrophic Lateral Sclerosis and Frontotemporal Degeneration
https://www.readbyqxmd.com/read/27814616/microglia-glioma-cross-talk-a-two-way-approach-to-new-strategies-against-glioma
#13
Cataldo Arcuri, Bernard Fioretti, Roberta Bianchi, Carmen Mecca, Claudia Tubaro, Tommaso Beccari, Fabio Franciolini, Ileana Giambanco, Rosario Donato
Glioblastoma (GBM) is the most malignant and aggressive among primary brain tumors, characterized by very low life expectancy. In vivo, glioma and glioblastoma in particular contain large numbers of immune cells (myeloid cells) such as microglia and tumour-infiltrating macrophages (or glioma associated macrophages). These glioma-infiltrating myeloid cells comprise up to 30% of total tumor mass and have been suggested to play several roles in glioma progression including proliferation, survival, motility and immunosuppression...
January 1, 2017: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/27805577/sex-differences-in-mouse-hippocampal-astrocytes-after-in-vitro-ischemia
#14
Vishal Chanana, Abdulfettah Tumturk, Douglas Kintner, Eshwar Udho, Peter Ferrazzano, Pelin Cengiz
Astrogliosis following hypoxia/ischemia (HI)-related brain injury plays a role in increased morbidity and mortality in neonates. Recent clinical studies indicate that the severity of brain injury appear to be sex dependent, and that the male neonates are more susceptible to the effects of HI-related brain injury, resulting in more severe neurological outcomes as compared to females with comparable brain injuries. The development of reliable methods to isolate and maintain highly enriched populations of sexed hippocampal astrocytes is essential to understand the cellular basis of sex differences in the pathological consequences of neonatal HI...
October 25, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27772534/glial-cells-as-key-elements-in-the-pathophysiology-and-treatment-of-bipolar-disorder
#15
Mojtaba Keshavarz
OBJECTIVE: The exact pathophysiology of bipolar disorder (BD) is not yet fully understood, and there are many questions in this area which should be answered. This review aims to discuss the roles of glial cells in the pathophysiology of BD and their contribution to the mechanism of action of mood-stabilising drugs. METHODS: We critically reviewed the most recent advances regarding glial cell roles in the pathophysiology and treatment of BD and the neuroprotective and neurotrophic effects of these cells...
October 24, 2016: Acta Neuropsychiatrica
https://www.readbyqxmd.com/read/27765016/the-addition-of-s100b-to-guidelines-for-management-of-mild-head-injury-is-potentially-cost-saving
#16
Olga Calcagnile, Anders Anell, Johan Undén
BACKGROUND: Mild traumatic brain injury (TBI) is associated with substantial costs due to over-triage of patients to computed tomography (CT) scanning, despite validated decision rules. Serum biomarker S100B has shown promise for safely omitting CT scans but the economic impact from clinical use has never been reported. In 2007, S100B was adapted into the existing Scandinavian management guidelines in Halmstad, Sweden, in an attempt to reduce CT scans and save costs. METHODS: Consecutive adult patients with mild TBI (GCS 14-15, loss of consciousness and/or amnesia), managed with the aid of S100B, were prospectively included in this study...
October 20, 2016: BMC Neurology
https://www.readbyqxmd.com/read/27752625/treatment-of-acute-carbon-monoxide-poisoning-with-induced-hypothermia
#17
Byoung-Joon Oh, Yong-Gyun Im, Eunjung Park, Young-Gi Min, Sang-Cheon Choi
OBJECTIVE: The effect of induced hypothermia on severe acute carbon monoxide (CO) poisoning remains to be addressed further. We investigated the effect of induced hypothermia on severe acute CO poisoning. METHODS: Retrospective chart review was conducted for patients who diagnosed as severe acute CO poisoning in emergency department and underwent induced hypothermia from May 2013 to May 2014. Hospital courses with critical medication and major laboratory results were investigated through the chart review...
June 2016: Clinical and Experimental Emergency Medicine
https://www.readbyqxmd.com/read/27728898/relevance-of-serum-biomarkers-associated-with-melanoma-during-follow-up-of-anti-ctla-4-immunotherapy
#18
Joana Felix, Bruno Cassinat, Raphael Porcher, Marie-Hélène Schlageter, Eve Maubec, Cécile Pages, Barouyr Baroudjian, Laurence Homyrda, Wahid Boukouaci, Ryad Tamouza, Martine Bagot, Anne Caignard, Antoine Toubert, Céleste Lebbé, Hélène Moins-Teisserenc
Metastatic melanoma is a rapidly spreading cancer whose prognosis remains poor although important therapy advances in recent years. Ipilimumab, an anti-CTLA-4 immunotherapy used in advanced melanoma, is an effective immunotherapy alone or combined with other agents but with few predictive biomarkers of response. Here, we sought to analyze the potential of S100B, MIA, soluble MICA, anti-MICA antibodies and LDH as serum biomarkers of response and survival in a cohort of 77 advanced melanoma patients subjected to ipilimumab...
October 8, 2016: International Immunopharmacology
https://www.readbyqxmd.com/read/27722926/mpp-lesioned-mice-an-experimental-model-of-motor-emotional-memory-learning-and-striatal-neurochemical-dysfunctions
#19
Mauricio P Cunha, Francis L Pazini, Vicente Lieberknecht, Josiane Budni, Ágatha Oliveira, Júlia M Rosa, Gianni Mancini, Leidiane Mazzardo, André R Colla, Marina C Leite, Adair R S Santos, Daniel F Martins, Andreza F de Bem, Carlos Alberto S Gonçalves, Marcelo Farina, Ana Lúcia S Rodrigues
The neurotoxin 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) induces motor and nonmotor dysfunctions resembling Parkinson's disease (PD); however, studies investigating the effects of 1-methyl-4-phenylpyridinium (MPP(+)), an active oxidative product of MPTP, are scarce. This study investigated the behavioral and striatal neurochemical changes (related to oxidative damage, glial markers, and neurotrophic factors) 24 h after intracerebroventricular administration of MPP(+) (1.8-18 μg/mouse) in C57BL6 mice...
October 8, 2016: Molecular Neurobiology
https://www.readbyqxmd.com/read/27705749/high-gdf-15-serum-levels-independently-correlate-with-poorer-overall-survival-of-tumor-free-stage-iii-and-unresectable-stage-iv-melanoma-patients
#20
Benjamin Weide, Tina Schäfer, Alexander Martens, Anastasia Kuzkina, Laura Uder, Seema Noor, Claus Garbe, Patrick N Harter, Michel Mittelbronn, Jörg Wischhusen
Biomarkers are strongly needed for diagnostic surveillance of metastatic melanoma patients. Based on its known association with tumor metastasis and its ability to induce cancer cachexia we investigated serum levels of growth and differentiation factor 15 (sGDF-15) as marker for overall survival (OS). sGDF-15 was retrospectively measured by ELISA in 761 samples obtained at distinct time points during routine clinical care of stage III/IV melanoma patients. In the entire cohort sGDF-15 ≥1.5ng/mL was strongly associated with reduced OS after assessment...
July 22, 2016: Journal of Investigative Dermatology
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