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https://www.readbyqxmd.com/read/29117462/striking-an-access-to-the-bacteria-via-reversible-control-of-lipophilicity
#1
Anzhela Galstyan, Johannes Putze, Ulrich Dobrindt
Development of antimicrobial photodynamic therapy (aPDT) is highly dependent on the development of suitable photosensitizers (PS): ideally affinity of PS towards bacterial cells should be much higher than towards mammalian cells. Cationic charge of PS may lead to selective binding of PS to bacteria mediated by electrostatic interaction; however, the photodynamic outcome is highly dependent on the lipophilicity of PS. Herein we report the aPDT effect of silicon(IV)phthalocyanine derivatives bearing four positive charges and methyl, phenyl or naphthyl substituents on the periphery of the macrocycle...
November 8, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29075880/endovascular-stroke-treatment-how-far-downstream-should-we-go
#2
Benjamin Friedrich, Donald Lobsien, Silke Wunderlich, Christian Maegerlein, David Pree, Karl-Titus Hoffmann, Claus Zimmer, Johannes Kaesmacher
BACKGROUND: Endovascular thrombectomy has become the de facto standard in the treatment of large vessel occlusion. Previously, a correlation between good outcome and the occlusion site, measured by the 'distance to thrombus' (DT)-as the distance from the carotid T to the beginning of the thrombus-after thrombolysis could be shown. In the present study, we analyze the differences between the chances of a good outcome in respect of DT between patients treated endovascularly or intravenously...
October 26, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/29057059/lucky-switcheroo-dramatic-potency-and-selectivity-improvement-of-imidazoline-inhibitors-of-human-carbonic-anhydrase-vii
#3
Stanislav Kalinin, Stanislav Kopylov, Tiziano Tuccinardi, Alexander Sapegin, Dmitry Dar'in, Andrea Angeli, Claudiu T Supuran, Mikhail Krasavin
A substantial improvement of potency and selectivity of imidazoline-based inhibitors of hCA VII (a promising target for the treatment of seizures and neuropathic pain) was achieved by simply switching the position of the benzenesulfonamide moiety from N(1) (as in the earlier reported series) to C(2). Selectivity indices vs the off-target isoforms (hCA I, I, I and IV) greater than 100 were reached, which is exceedingly rare for hCA VII inhibitors. The drastic profile improvement of the new series has been rationalized by an additional hydrogen bonding with the nonconserved Q69 residue in the active site of hCA VII (absent in the other three isoforms studied), which also results in a favorable accommodation of the inhibitor's lipophilic periphery in the nearby hydrophobic pocket...
October 12, 2017: ACS Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29040410/ror%C3%AE-coordinates-thalamic-and-cortical-maturation-to-instruct-barrel-cortex-development
#4
Tania Vitalis, Luce Dauphinot, Pierre Gressens, Marie-Claude Potier, Jean Mariani, Patricia Gaspar
The retinoic acid-related orphan receptor alpha (RORα) is well-known for its role in cerebellar development and maturation as revealed in staggerer mice. However, its potential involvement in the development of other brain regions has hardly been assessed. Here, we describe a new role of RORα in the development of primary somatosensory maps. Staggerer mice showed a complete disruption of barrels in the somatosensory cortex and of barreloids in the thalamus. This phenotype results from a severe reduction of thalamocortical axon (TCA) branching and a defective maturation of layer IV cortical neurons during postnatal development...
October 13, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28985760/an-improved-pre-clinical-patient-derived-liquid-xenograft-mouse-model-for-acute-myeloid-leukemia
#5
Zhisheng Her, Kylie Su Mei Yong, Kathirvel Paramasivam, Wilson Wei Sheng Tan, Xue Ying Chan, Sue Yee Tan, Min Liu, Yong Fan, Yeh Ching Linn, Kam Man Hui, Uttam Surana, Qingfeng Chen
BACKGROUND: Xenotransplantation of patient-derived AML (acute myeloid leukemia) cells in NOD-scid Il2rγ (null) (NSG) mice is the method of choice for evaluating this human hematologic malignancy. However, existing models constructed using intravenous injection in adult or newborn NSG mice have inferior engraftment efficiency, poor peripheral blood engraftment, or are difficult to construct. METHODS: Here, we describe an improved AML xenograft model where primary human AML cells were injected into NSG newborn pups intrahepatically...
October 6, 2017: Journal of Hematology & Oncology
https://www.readbyqxmd.com/read/28808085/sub-mitochondrial-localization-of-the-genetic-tagged-mitochondrial-intermembrane-space-bridging-components-mic19-mic60-and-sam50
#6
Mira Sastri, Manjula Darshi, Mason Mackey, Ranjan Ramachandra, Saeyeon Ju, Sebastien Phan, Stephen Adams, Kathryn Stein, Christopher R Douglas, Jiwan John Kim, Mark H Ellisman, Susan S Taylor, Guy A Perkins
Each mitochondrial compartment contains varying protein compositions that underlie a diversity of localized functions. Insights into the localization of mitochondrial intermembrane space-bridging (MIB) components will have an impact on our understanding of mitochondrial architecture, dynamics and function. By using the novel visualizable genetic tags miniSOG and APEX2 in cultured mouse cardiac and human astrocyte cell lines and performing electron tomography, we have mapped at nanoscale resolution three key MIB components, Mic19, Mic60 and Sam50 (also known as CHCHD3, IMMT and SAMM50, respectively), in the environment of structural landmarks such as cristae and crista junctions (CJs)...
October 1, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28780628/surgical-excision-of-symptomatic-mature-posttraumatic-myositis-ossificans-characteristics-and-outcomes-in-32-athletes
#7
Sakari Orava, Juha-Jaakko Sinikumpu, Janne Sarimo, Lasse Lempainen, Gideon Mann, Iftach Hetsroni
PURPOSE: The purpose of this study was to report characteristics and outcomes of surgical excision of symptomatic mature posttraumatic myositis ossificans in adult athletes. The hypothesis was that surgical excision of the ossified mass in these circumstances can effectively relief symptoms and result in return to high-level sports with minimal postoperative complications. METHODS: All operations involving excision of posttraumatic heterotopic ossifications performed between 1987 and 2015 were reviewed...
August 5, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28767130/tumor-associated-microglia-macrophages-predict-poor-prognosis-in-high-grade-gliomas-and-correlate-with-an-aggressive-tumor-subtype
#8
Mia D Sørensen, Rikke H Dahlrot, Henning B Boldt, Steinbjørn Hansen, Bjarne W Kristensen
AIMS: Glioblastomas are highly aggressive and treatment-resistant. Increasing evidence suggests that tumor-associated macrophages/microglia (TAMs) facilitate tumor progression by acquiring a M2-like phenotype. Our objective was to investigate the prognostic value of TAMs in gliomas using automated quantitative double immunofluorescence. METHODS: Samples from 240 patients with primary glioma were stained with antibodies against ionized calcium-binding adaptor molecule-1 (IBA-1) and CD204 to detect TAMs and M2-like TAMs...
August 2, 2017: Neuropathology and Applied Neurobiology
https://www.readbyqxmd.com/read/28758044/deep-brain-stimulation-of-hemiparkinsonian-rats-with-unipolar-and-bipolar-electrodes-for-up-to-6-weeks-behavioral-testing-of-freely-moving-animals
#9
Kathrin Badstuebner, Ulrike Gimsa, Immo Weber, Armin Tuchscherer, Jan Gimsa
Although the clinical use of deep brain stimulation (DBS) is increasing, its basic mechanisms of action are still poorly understood. Platinum/iridium electrodes were inserted into the subthalamic nucleus of rats with unilateral 6-OHDA-induced lesions of the medial forebrain bundle. Six behavioral parameters were compared with respect to their potential to detect DBS effects. Locomotor function was quantified by (i) apomorphine-induced rotation, (ii) initiation time, (iii) the number of adjusting steps in the stepping test, and (iv) the total migration distance in the open field test...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/28717612/intratendinous-tears-of-the-achilles-tendon-a-new-pathology-analysis-of-a-large-4-year-cohort
#10
Otto Chan, Sarah Morton, Mel Pritchard, Tina Parkes, Peter Malliaras, Tom Crisp, Nat Padhiar, Nicola Maffulli, John King, Dylan Morrissey
BACKGROUND: Achillodynia is common and includes Achilles tendinopathy, partial Achilles tears and Achilles tendon ruptures. However, we believe an additional pathology should be considered for Achillodynia differentials - the intratendinous tear (ITT). METHODS: Examinations of 740 achillodynic patients in one specialist centre were reviewed. ITTs were defined as a clearly visualised echopoor area situated centrally and extending to, but not through the tendon periphery, with pain on palpation and no clinical findings consistent with Achilles rupture...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28712861/a-novel-golgi-cox-staining-method-for-detecting-and-characterizing-roles-of-the-hepatic-stellate-cells-in-liver-injury
#11
Ma de Jesús Gómez Villalobos, Susana Vidrio, Ruth Giles López, Gabriel Flores Gómez, Victoria Chagoya de Sánchez
The aim of this study was to investigate the utility of the Golgi-Cox method to characterize the distribution and morphological changes of the hepatic stellate cells (HSCs) in CCl4 liver damaged rats. Six-week-old male Wistar rats were injected with CCl4 for ten weeks. The livers were processed with the Golgi-Cox method, reticuline, and Massońs Trichrome stains, and analyzed under light microscopy. Histological evaluation of livers was made through the METAVIR score. In normal livers, the HSCs show stellate form with abundant thin cytoplasmic processes, distributed into hepatic lobule, mainly in zone 1...
June 30, 2017: Pathophysiology: the Official Journal of the International Society for Pathophysiology
https://www.readbyqxmd.com/read/28674504/antigliadin-antibodies-aga-igg-are-related-to-neurochemistry-in-schizophrenia
#12
Laura M Rowland, Haley K Demyanovich, S Andrea Wijtenburg, William W Eaton, Katrina Rodriguez, Frank Gaston, Daniela Cihakova, Monica V Talor, Fang Liu, Robert R McMahon, L Elliot Hong, Deanna L Kelly
Inflammation may play a role in schizophrenia; however, subgroups with immune regulation dysfunction may serve as distinct illness phenotypes with potential different treatment and prevention strategies. Emerging data show that about 30% of people with schizophrenia have elevated antigliadin antibodies of the IgG type, representing a possible subgroup of schizophrenia patients with immune involvement. Also, recent data have shown a high correlation of IgG-mediated antibodies between the periphery and cerebral spinal fluid in schizophrenia but not healthy controls, particularly AGA IgG suggesting that these antibodies may be crossing the blood-brain barrier with resulting neuroinflammation...
2017: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/28623974/increased-placental-phospholipase-a2-gene-expression-and-free-f2-isoprostane-levels-in-response-to-oxidative-stress-in-preeclampsia
#13
M Brien, J Larose, K Greffard, P Julien, J F Bilodeau
Vasoactive eicosanoids such as thromboxane (TX) A2 and F2-isoprostanes (F2-isoPs) were shown to be increased in the preeclamptic placenta. Only one of the 64 possible isomers of F2-isoPs derived from the oxidation of arachidonic acid was investigated in the placenta so far. F2-isoPs are released from membrane phospholipids by phospholipases A2 (PLA2) and were shown to act on the TXA2 receptor (TBXA2R). However, the PLA2 deregulated in preeclampsia (PE) remains to be determined. In this study, we analyzed the concentrations of six isomers of F2-isoPs; 8-iso-PGF2α, 8-iso-15(R)-PGF2α, 15(R)-PGF2α, iPF2α-IV, iPF2α-VI, 5-iPF2α-VI and the concentrations of the stable metabolites of TXA2, TXB2, by high performance liquid chromatography coupled with tandem mass spectrometry in placentas of PE (n = 17) and normotensive (n = 15) pregnancies according to the biopsy site: peri-insertion or periphery...
July 2017: Placenta
https://www.readbyqxmd.com/read/28617726/comparative-analysis-of-peripheral-corneal-geometry-in-health-and-keratoconus
#14
Enric Mas-Aixala, Joan Gispets, Núria Lupón, Genís Cardona
OBJECTIVES: To describe and compare corneal peripheral angles in normal and keratoconic eyes, to gain a better understanding of the topography of the periphery of the cornea in keratoconus and assist practitioners in the selection and fitting of large diameter contact lenses. METHODS: Eighty-eight eyes were included in the study, divided into three groups: healthy (A0, 28 eyes), keratoconus at stage I according to the Amsler-Krumeich classification (AI, 33 eyes) and keratoconus at stages II to IV (AII, 27 eyes)...
June 14, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28607094/pharmacology-of-the-nav1-1-domain-iv-voltage-sensor-reveals-coupling-between-inactivation-gating-processes
#15
Jeremiah D Osteen, Kevin Sampson, Vivek Iyer, David Julius, Frank Bosmans
The Nav1.1 voltage-gated sodium channel is a critical contributor to excitability in the brain, where pathological loss of function leads to such disorders as epilepsy, Alzheimer's disease, and autism. This voltage-gated sodium (Nav) channel subtype also plays an important role in mechanical pain signaling by primary afferent somatosensory neurons. Therefore, pharmacologic modulation of Nav1.1 represents a potential strategy for treating excitability disorders of the brain and periphery. Inactivation is a complex aspect of Nav channel gating and consists of fast and slow components, each of which may involve a contribution from one or more voltage-sensing domains...
June 27, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28588779/pancreatic-acinar-cell-carcinoma-presenting-with-panniculitis-successfully-treated-with-folfirinox-a-case-report
#16
Tomoyasu Yoshihiro, Kenta Nio, Kenji Tsuchihashi, Hiroshi Ariyama, Kenichi Kohashi, Nobuhiro Tsuruta, Fumiyasu Hanamura, Kyoko Inadomi, Mamoru Ito, Kosuke Sagara, Yuta Okumura, Michitaka Nakano, Shuji Arita, Hitoshi Kusaba, Yoshinao Oda, Koichi Akashi, Eishi Baba
Pancreatic acinar cell carcinoma (PACC) is a rare tumor of the exocrine pancreas, representing only 1% of all pancreatic malignancies. A 50-year-old man presented with edema of the thumb joints bilaterally, followed by an appearance of masses in the bilateral lower extremities and fever (38°C). The masses were diagnosed as panniculitis by skin biopsy, and multiple intraperitoneal masses were incidentally detected on pelvic magnetic resonance imaging performed to investigate the leg abnormalities. The patient was referred to the Kyushu University Hospital for further investigation, and fluorodeoxyglucose-positron emission tomography/computed tomography (CT) revealed high-uptake tumors in the pancreatic tail, in the periphery of the liver, and in the pelvis...
June 2017: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/28556833/blockade-of-interleukin-6-receptor-in-the-periphery-promotes-rapid-and-sustained-antidepressant-actions-a-possible-role-of-gut-microbiota-brain-axis
#17
J-C Zhang, W Yao, C Dong, C Yang, Q Ren, M Ma, K Hashimoto
Depression is a common, severe and chronic psychiatric disease. Although the currently available antidepressants have been used in the treatment of depression, their beneficial effects are limited. Accumulating evidence suggests that pro-inflammatory cytokines such as interleukin-6 (IL-6) have an important role in the pathogenesis of depression. This study was undertaken to examine whether anti-mouse IL-6 receptor antibody (MR16-1) induces antidepressant effects in a social defeat stress model. Intravenous injection of MR16-1 induced rapid-onset and long-lasting antidepressant effects in susceptible mice after social defeat stress through its anti-inflammatory actions...
May 30, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28525331/an-immunohistochemical-analysis-of-lymphocytic-infiltrations-in-canine-skin-cancers
#18
J A Madej, J P Madej, S Dzimira, M Nowak
Lymphocytic infiltrations located in the extracellular matrix often accompany canine skin cancer. They can be characterised as an inflammatory infiltration and/or a second tumour - lymphoma. The aim of this study was an immunohistochemical analysis of a lymphocytic infiltration which accompanies spontaneous skin cancer. Twenty basal cell carcinoma, 20 non-keratinizing squamous cell carcinoma, 20 keratinizing squamous cell carcinoma and 8 sebaceous gland carcinoma samples which were accompanied by a lymphocytic infiltration and/or secondary lymphatic follicles were verified histopathologically...
March 28, 2017: Polish Journal of Veterinary Sciences
https://www.readbyqxmd.com/read/28497026/chchd4-regulates-intracellular-oxygenation-and-perinuclear-distribution-of-mitochondria
#19
Luke W Thomas, Oliver Staples, Mark Turmaine, Margaret Ashcroft
Hypoxia is a characteristic of the tumor microenvironment and is known to contribute to tumor progression and treatment resistance. Hypoxia-inducible factor (HIF) dimeric transcription factors control the cellular response to reduced oxygenation by regulating the expression of genes involved in metabolic adaptation, cell motility, and survival. Alterations in mitochondrial metabolism are not only a downstream consequence of HIF-signaling but mitochondria reciprocally regulate HIF signaling through multiple means, including oxygen consumption, metabolic intermediates, and reactive oxygen species generation...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28483796/imaging-of-viral-neuroinvasion-in-the-zebrafish-reveals-that-sindbis-and-chikungunya-viruses-favour-different-entry-routes
#20
Gabriella Passoni, Christelle Langevin, Nuno Palha, Bryan C Mounce, Valérie Briolat, Pierre Affaticati, Elodie De Job, Jean-Stéphane Joly, Marco Vignuzzi, Maria-Carla Saleh, Philippe Herbomel, Pierre Boudinot, Jean-Pierre Levraud
Alphaviruses, such as chikungunya virus (CHIKV) and Sindbis virus (SINV), are vector-borne pathogens that cause acute illnesses in humans and are sometimes associated with neuropathies, especially in infants and elderly patients. Little is known about their mechanism of entry into the central nervous system (CNS), even for SINV, which has been used extensively as a model for viral encephalopathies. We previously established a CHIKV infection model in the optically transparent zebrafish larva; here we describe a new SINV infection model in this host...
July 1, 2017: Disease Models & Mechanisms
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