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S100B protein

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https://www.readbyqxmd.com/read/27925190/s100a1-and-s100b-calcium-sensors-at-the-cross-roads-of-multiple-chondrogenic-pathways
#1
REVIEW
José Diaz-Romero, Dobrila Nesic
The S100 protein family comprises more than 20 members of small calcium binding proteins operating as Ca2 + -activated switches that interact and modulate the activity of a large number of targets. S100A1 and S100B, two members of this family, have been recently associated with the differentiation status of human articular chondrocytes. Both proteins are homogeneously expressed in all cartilage zones, their expression decreases during chondrocyte dedifferentiation, and can be induced under conditions promoting redifferentiation...
December 7, 2016: Journal of Cellular Physiology
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/27863321/cognitive-dysfunction-correlates-with-elevated-serum-s100b-concentration-in-drug-free-acutely-relapsed-patients-with-schizophrenia
#4
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
#5
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
#6
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
#7
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/27829338/electrochemical-biosensor-for-detection-of-glycated-albumin
#8
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
#9
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/27814616/microglia-glioma-cross-talk-a-two-way-approach-to-new-strategies-against-glioma
#10
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
#11
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/27752625/treatment-of-acute-carbon-monoxide-poisoning-with-induced-hypothermia
#12
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/27722926/mpp-lesioned-mice-an-experimental-model-of-motor-emotional-memory-learning-and-striatal-neurochemical-dysfunctions
#13
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/27697434/elevation-of-oxidative-stress-indicators-in-a-pilot-study-of-plasma-following-traumatic-brain-injury
#14
Alison Halstrom, Ellen MacDonald, Claire Neil, Glenn Arendts, Daniel Fatovich, Melinda Fitzgerald
Traumatic brain injury (TBI) encompasses a broad range of injury mechanisms and severity. A detailed determination of TBI severity can be a complex challenge, with current clinical tools sometimes insufficient to tailor a clinical response to a spectrum of patient needs. Blood biomarkers of TBI may supplement clinical assessments but currently available biomarkers have limited sensitivity and specificity. While oxidative stress is known to feature in damage mechanisms following TBI, investigation of blood biomarkers of oxidative stress has been limited...
September 30, 2016: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/27695697/a-novel-model-for-acute-peripheral-nerve-injury-in-the-horse-and-evaluation-of-the-effect-of-mesenchymal-stromal-cells-applied-in-situ-on-nerve-regeneration-a-preliminary-study
#15
Claudia Cruz Villagrán, Jim Schumacher, Robert Donnell, Madhu S Dhar
Transplantation of mesenchymal stromal cells (MSCs) to sites of experimentally created nerve injury in laboratory animals has shown promising results in restoring nerve function. This approach for nerve regeneration has not been reported in horses. In this study, we first evaluated the in vitro ability of equine bone marrow-derived MSCs (EBM-MSCs) to trans-differentiate into Schwann-like cells and subsequently tested the MSCs in vivo for their potential to regenerate a transected nerve after implantation. The EBM-MSCs from three equine donors were differentiated into SCLs for 7 days, in vitro, in the presence of specialized differentiation medium and evaluated for morphological characteristics, by using confocal microscopy, and for protein characteristics, by using selected Schwann cell markers (GFAP and S100b)...
2016: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/27695398/integrative-signaling-networks-of-membrane-guanylate-cyclases-biochemistry-and-physiology
#16
Rameshwar K Sharma, Teresa Duda, Clint L Makino
This monograph presents a historical perspective of cornerstone developments on the biochemistry and physiology of mammalian membrane guanylate cyclases (MGCs), highlighting contributions made by the authors and their collaborators. Upon resolution of early contentious studies, cyclic GMP emerged alongside cyclic AMP, as an important intracellular second messenger for hormonal signaling. However, the two signaling pathways differ in significant ways. In the cyclic AMP pathway, hormone binding to a G protein coupled receptor leads to stimulation or inhibition of an adenylate cyclase, whereas the cyclic GMP pathway dispenses with intermediaries; hormone binds to an MGC to affect its activity...
2016: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/27652205/s100b-and-s100b-autoantibody-as-biomarkers-for-early-detection-of-brain-metastases-in-lung-cancer
#17
Humberto Choi, Vikram Puvenna, Chanda Brennan, Shamseldeen Mahmoud, Xiao-Feng Wang, Michael Phillips, Damir Janigro, Peter Mazzone
BACKGROUND: S100B is an astrocytic protein that enters the blood stream when there is disruption of the blood-brain barrier (BBB). Over time, antibodies against S100B develop in the sera of patients who experience persistent or repeated BBB disruptions. We explored the use of serum S100B protein and S100B autoantibodies for the detection of brain metastasis in patients with lung cancer. METHODS: One hundred and twenty eight untreated patients with lung cancer who had brain imaging performed as part of their routine evaluation, participated...
August 2016: Translational Lung Cancer Research
https://www.readbyqxmd.com/read/27623738/acetazolamide-mitigates-astrocyte-cellular-edema-following-mild-traumatic-brain-injury
#18
Nasya M Sturdivant, Sean G Smith, Syed F Ali, Jeffrey C Wolchok, Kartik Balachandran
Non-penetrating or mild traumatic brain injury (mTBI) is commonly experienced in accidents, the battlefield and in full-contact sports. Astrocyte cellular edema is one of the major factors that leads to high morbidity post-mTBI. Various studies have reported an upregulation of aquaporin-4 (AQP4), a water channel protein, following brain injury. AZA is an antiepileptic drug that has been shown to inhibit AQP4 expression and in this study we investigate the drug as a therapeutic to mitigate the extent of mTBI induced cellular edema...
September 14, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27604350/utility-of-neuron-specific-enolase-in-traumatic-brain-injury-relations-to-s100b-levels-outcome-and-extracranial-injury-severity
#19
Eric Peter Thelin, Emma Jeppsson, Arvid Frostell, Mikael Svensson, Stefania Mondello, Bo-Michael Bellander, David W Nelson
BACKGROUND: In order to improve assessment and outcome prediction in patients suffering from traumatic brain injury (TBI), cerebral protein levels in serum have been suggested as biomarkers of injury. However, despite much investigation, biomarkers have yet to reach broad clinical utility in TBI. This study is a 9-year follow-up and clinical experience of the two most studied proteins, neuron-specific enolase (NSE) and S100B, in a neuro-intensive care TBI population. Our aims were to investigate to what extent NSE and S100B, independently and in combination, could predict outcome, assess injury severity, and to investigate if the biomarker levels were influenced by extracranial factors...
September 8, 2016: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/27601207/s100b-suppresses-the-differentiation-of-c3h-10t1-2-murine-embryonic-mesenchymal-cells-into-osteoblasts
#20
Dong Li, Kaihua Li, Gang Chen, Jianlong Xia, Ting Yang, Ping Cai, Chen Yao, Yongjiang Yang, Shichang Yan, Rihua Zhang, Hui Chen
S100 calcium-binding protein B (S100B) is expressed and released by adipocytes, and is positively correlated with body mass index, however, the direct effects of S100B on adipocytes remain unclear. Bone marrow‑derived mesenchymal stem cells have the capacity to differentiate into osteoblasts and adipocytes, which is important for bone metabolism. The current study aimed to determine the effect of S100B on adipogenesis and osteogenesis. The mouse embryo cell line C3H/10T1/2 was used to build cell models with varying levels of S100B protein expression...
October 2016: Molecular Medicine Reports
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