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Mariana Matias, Samuel Silvestre, Amílcar Falcão, Gilberto Alves
Purpose - During the discovery and development of new drugs, compounds with low aqueous solubility pose special challenges in their pharmacological evaluation and, therefore, the selection of appropriate vehicles to administer the compounds of interest is determinant for the quality of the results generated during the in vivo non-clinical studies. This work aimed to evaluate the motor deficit (as a surrogate of neurotoxicity) of several administration/delivery vehicles through the rotarod performance test. Methods - Trained male CD-1 mice were intraperitoneally administered with the following vehicles: dimethyl sulfoxide (DMSO), aqueous sodium chloride (NaCl) 0...
2018: Journal of Pharmacy & Pharmaceutical Sciences: a Publication of the Canadian Society for Pharmaceutical Sciences
Alistair M Middleton, Cristina Dal Bosco, Phillip Chlap, Robert Bensch, Hartmann Harz, Fugang Ren, Stefan Bergmann, Sabrina Wend, Wilfried Weber, Ken-Ichiro Hayashi, Matias D Zurbriggen, Rainer Uhl, Olaf Ronneberger, Klaus Palme, Christian Fleck, Alexander Dovzhenko
In plants, the phytohormone auxin acts as a master regulator of developmental processes and environmental responses. The best characterized process in the auxin regulatory network occurs at the subcellular scale, wherein auxin mediates signal transduction into transcriptional programs by triggering the degradation of Aux/IAA transcriptional repressor proteins in the nucleus. However, whether and how auxin movement between the nucleus and the surrounding compartments is regulated remain elusive. Using a fluorescent auxin analog, we show that its diffusion into the nucleus is restricted...
March 13, 2018: Cell Reports
Hannu Kokki, Martin Maaroos, Sten Ellam, Jari Halonen, Ilkka Ojanperä, Merja Ranta, Veli-Pekka Ranta, Aleksandra Tolonen, Oscar Lindberg, Matias Viitala, Juha Hartikainen
PURPOSE: Cardiac surgery and conventional extracorporeal circulation (CECC) impair the bioavailability of drugs administered by mouth. It is not known whether miniaturized ECC (MECC) or off-pump surgery (OPCAB) affect the bioavailability in similar manner. We evaluated the metoprolol bioavailability in patients undergoing CABG surgery with CECC, MECC, or having OPCAB. METHODS: Thirty patients, ten in each group, aged 44-79 years, scheduled for CABG surgery were administered 50 mg metoprolol by mouth on the preoperative day at 8-10 a...
March 9, 2018: European Journal of Clinical Pharmacology
Kathleen R Cho, Kumarasen Cooper, Sabrina Croce, Bojana Djordevic, Simon Herrington, Brooke Howitt, Pei Hui, Philip Ip, Martin Koebel, Sigurd Lax, Bradley J Quade, Patricia Shaw, August Vidal, Anna Yemelyanova, Blaise Clarke, Lora Hedrick Ellenson, Teri A Longacre, Ie-Ming Shih, W Glenn McCluggage, Anais Malpica, Esther Oliva, Vinita Parkash, Xavier Matias-Guiu
The aim of this article is to propose guidelines and recommendations in problematic areas in pathologic reporting of endometrial carcinoma (EC) regarding special techniques and ancillary studies. An organizing committee designed a comprehensive survey with different questions related to pathologic features, diagnosis, and prognosis of EC that was sent to all members of the International Society of Gynecological Pathologists. The special techniques/ancillary studies group received 4 different questions to be addressed...
March 8, 2018: International Journal of Gynecological Pathology
Natércia Matias, Filipa Ferreira, José Saldanha Matos, Asbjørn Haaning Nielsen, Jes Vollertsen
  Mass transfer of a range of volatile substances was studied under highly turbulent conditions. The applied setup mimicked drop structures, where the release of volatile organic carbons likely occurs at a high rate. The experiments covered several substances in a range of resistances from residing entirely in the liquid film to being fully in the gas film. The two-film theory yielded a good prediction of the whole measured range. This allowed the experimental validation of a method where two reference substances are applied, to determine the transfer of any other substance - independently of where its resistance to mass transfer resides...
March 1, 2018: Water Environment Research: a Research Publication of the Water Environment Federation
Giulio Calza, Elisabeth Nyberg, Matias Mäkinen, Rabah Soliymani, Annunziata Cascone, Dan Lindholm, Emanuele Barborini, Marc Baumann, Maciej Lalowski, Ove Eriksson
Metformin is the first line drug for type 2 diabetes but its molecular mechanisms remain unclear. Here, we have studied the acute effect of a therapeutically relevant intrahepatic concentration of metformin on glucose production from lactate. We selected the perfused rat liver as experimental system since it enables the complete control of drug dosage. We used MALDI (matrix-assisted laser desorption/ionization) mass spectrometry imaging to estimate the concentration of metformin in the livers and we measured the concentration of glucose in the effluent medium under basal conditions and following lactate addition...
2018: Frontiers in Pharmacology
Leonardo Iula, Irene A Keitelman, Florencia Sabbione, Federico Fuentes, Mauricio Guzman, Jeremías Gastón Galletti, Pehuén Pereyra Gerber, Matías Ostrowski, Jorge R Geffner, Carolina C Jancic, Analía S Trevani
Interleukin-1β (IL-1β), a major pro-inflammatory cytokine, is a leaderless cytosolic protein whose secretion does not follow the classical endoplasmic reticulum-to-Golgi pathway, and for which a canonical mechanism of secretion remains to be established. Neutrophils are essential players against bacterial and fungi infections. These cells are rapidly and massively recruited from the circulation into infected tissues and, beyond of displaying an impressive arsenal of toxic weapons effective to kill pathogens, are also an important source of IL-1β in infectious conditions...
2018: Frontiers in Immunology
Giovanni Ulloa, Carolina P Quezada, Mabel Araneda, Blanca Escobar, Edwar Fuentes, Sergio A Álvarez, Matías Castro, Nicolás Bruna, Rodrigo Espinoza-González, Denisse Bravo, José M Pérez-Donoso
Recently, we reported the production of Cadmium sulfide (CdS) fluorescent semiconductor nanoparticles (quantum dots, QDs) by acidophilic bacteria of the Acidithiobacillus genus. Here, we report that the addition of inorganic phosphate to Acidithiobacillus thiooxidans ATCC 19703 cultures favors the biosynthesis of CdS QDs at acidic conditions (pH 3.5). The effect of pH, phosphate and cadmium concentrations on QDs biosynthesis was studied by using Response Surface Methodology (RSM), a multivariate technique for analytical optimization scarcely used in microbiological studies to date...
2018: Frontiers in Microbiology
Cyprian Olchowy, Matías de Albert, Manuel Perez, Nikaoly Ciriaco, Rosa Dominguez Oronoz
The original version of this article unfortunately contained mistakes. The authornames of Matías de Albert, Manuel Perez, and Rosa Dominguez Oronoz as well as the affiliation of Dr. Perez are now corrected in this article.
March 7, 2018: Skeletal Radiology
Chantal Desdouets, Matías A Avila
No abstract text is available yet for this article.
March 3, 2018: Gastroenterology
Federico Piñero, Sebastián Marciano, Nora Fernández, Jorge Silva, Yanina Zambelo, Manuel Cobos, Alina Zerega, Ezequiel Ridruejo, Carlos Miguez, Beatriz Ameigeiras, Claudia D'Amico, Luis Gaite, Matías Coronel, Carla Bermúdez, Carlos Rosales, Gustavo Romero, Lucas McCormack, Virginia Reggiardo, Luis Colombato, Adrián Gadano, Fernando Rubinstein, Marcelo Silva
BACKGROUND AND AIM: Adherence to the Barcelona Clinic Liver Cancer (BCLC) staging algorithm for the treatment of hepatocellular carcinoma is challenging in the daily practice. We aimed to analyze adherence to BCLC along with its effect on patient survival. PATIENTS AND METHODS: A cohort study was conducted in 14 hospitals from Argentina including patients with newly diagnosed hepatocellular carcinoma (2009-2016). Adherence was considered when the first treatment was the one recommended by the BCLC...
April 2018: European Journal of Gastroenterology & Hepatology
Tjalling Bosse, Remi A Nout, Jessica N McAlpine, Melissa K McConechy, Heidi Britton, Yaser R Hussein, Carlene Gonzalez, Raji Ganesan, Jane C Steele, Beth T Harrison, Esther Oliva, August Vidal, Xavier Matias-Guiu, Nadeem R Abu-Rustum, Douglas A Levine, C Blake Gilks, Robert A Soslow
Our aim was to investigate whether molecular classification can be used to refine prognosis in grade 3 endometrial endometrioid carcinomas (EECs). Grade 3 EECs were classified into 4 subgroups: p53 abnormal, based on mutant-like immunostaining (p53abn); MMR deficient, based on loss of mismatch repair protein expression (MMRd); presence of POLE exonuclease domain hotspot mutation (POLE); no specific molecular profile (NSMP), in which none of these aberrations were present. Overall survival (OS) and recurrence-free survival (RFS) rates were compared using the Kaplan-Meier method (Log-rank test) and univariable and multivariable Cox proportional hazard models...
March 2, 2018: American Journal of Surgical Pathology
Matías A Medina, Víctor M Andrade, Mario O Caracci, Miguel E Avila, Daniela A Verdugo, Macarena F Vargas, Giorgia D Ugarte, Ariel E Reyes, Carlos Opazo, Giancarlo V De Ferrari
Synaptic abnormalities have been described in individuals with autism spectrum disorders (ASD). The cell-adhesion molecule Neuroligin-3 (Nlgn3) has an essential role in the function and maturation of synapses and NLGN3 ASD-associated mutations disrupt hippocampal and cortical function. Here we show that Wnt/β-catenin signaling increases Nlgn3 mRNA and protein levels in HT22 mouse hippocampal cells and primary cultures of rat hippocampal neurons. We characterized the activity of mouse and rat Nlgn3 promoter constructs containing conserved putative T-cell factor/lymphoid enhancing factor (TCF/LEF)-binding elements (TBE) and found that their activity is significantly augmented in Wnt/β-catenin cell reporter assays...
March 5, 2018: Translational Psychiatry
Matias Iglicki, Dinah Zur, Catharina Busch, Mali Okada, Anat Loewenstein
PURPOSE: Intravitreal anti-vascular endothelial growth factor agents have been shown to reduce diabetic retinopathy (DR) progression; data on the effects of intravitreal corticosteroids on modifying disease severity are limited. This study evaluates the long-term effect of intravitreal dexamethasone implant (DEX) on the severity and progression of non-proliferative DR (NPDR). METHODS: This was a retrospective cohort study. Sixty eyes from 60 consecutive patients with NPDR and diabetic macular edema (DME) treated with dexamethasone implant (DEX group) and 49 eyes from consecutive 49 patients without DME requiring observation only...
March 1, 2018: Acta Diabetologica
Matias E Czerwonko, Pablo Huespe, Cristina M Elizondo, Juan Pekolj, Adrian Gadano, Laura Barcán, Sung-Ho Hyon, Eduardo de Santibañes, Martín de Santibañes
BACKGROUND: Adult liver recipients (ALR) differ from the general population with pyogenic liver abscess (PLA) as they exhibit: reconstructed biliary anatomy, recurrent hospitalizations, poor clinical condition and are subjected to immunosuppression. The aim of this study was to identify risk factors associated with PLA in ALR and to analyze the management experience of these patients. METHODS: Between 1996 and 2016, 879 adult patients underwent liver transplantation (LT), 26 of whom developed PLA...
February 26, 2018: HPB: the Official Journal of the International Hepato Pancreato Biliary Association
Janet Trujillo, Matias Costa Vieira, Jaqueline Lepsch, Fernanda Rebelo, Lucilla Poston, Dharmintra Pasupathy, Gilberto Kac
BACKGROUND: Nutritional requirements need to be met in order to adapt to pre- and postnatal changes. Our aim was to systematically review the evidence of associations between nutritional biomarkers and psychological distress during pregnancy and in the first postnatal year. METHODS: MEDLINE, EMBASE, PsycINFO, Scielo, LILACS,, International Clinical Trials Registry, Cochrane Library, Scopus and Web of Science databases were searched for articles from inception to 4/15/2016...
February 15, 2018: Journal of Affective Disorders
Mariane Beatriz Sordi, Thaís Altoé Moreira, Juan Felipe Dumes Montero, Luis Cláudio Barbosa, César Augusto Magalhães Benfatti, Ricardo de Souza Magini, Andréa de Lima Pimenta, Júlio César Matias de Souza
Considering oral diseases, antibiofilm compounds can decrease the accumulation of pathogenic species such as Streptococcus mutans at micro-areas of teeth, dental restorations or implant-supported prostheses. OBJECTIVE: To assess the effect of thirteen different novel lactam-based compounds on the inhibition of S. mutans biofilm formation. MATERIAL AND METHODS: We synthesized compounds based on γ-lactones analogues from rubrolides by a mucochloric acid process and converted them into their corresponding γ-hydroxy-γ-lactams by a reaction with isobutylamine and propylamine...
2018: Journal of Applied Oral Science: Revista FOB
Daniela Fluxá, Jorge Segovia, Matías Florenzano, Jessica Salinas, Lilian Flores, Daniela Simian, Rodrigo Quera
There are no evidence-based guidelines about prophylaxis against Pneumocystis jiroveci pneumonia in inflammatory bowel disease. We report a case of P. jiroveci pneumonia in patient with Crohn's disease receiving infliximab and methotrexate. This case emphasizes the importance of considering the possibility of this infection in inflammatory bowel disease patients treated on biological therapy.
October 2017: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
Manuel Barrera O, Rodrigo Barrera M, Matías de la Rivera V, Javier Vela U, Gustavo Mönckeberg F
Although gastrointestinal symptoms are not rare in Systemic lupus erythematosus, enteritis is an atypical manifestation of the disease. We report a 54 year-old woman who presented acute symptoms of diarrhea, fever and abdominal pain, receiving empiric antibiotic therapy for bacterial enteritis with no response. Computed tomography showed diffuse small intestine inflammation and serositis. Antinuclear antibodies, anti-Ro and anti-La were positive on blood tests. A lupic enteropathy was diagnosed and steroid treatment was initiated, with subsequent clinical improvement...
October 2017: Revista Médica de Chile
Marcela Bitran, Matías González, Pía Nitsche, Denisse Zúñiga, Arnoldo Riquelme
At the end of May 2017, the third version of the Latin American Conference on Resident Education, LACRE, was held in Chile; it convened 433 people from 14 regional countries. Chronic stress and emotional exhaustion of residents was one of the topics discussed. Reports from different countries documented that about half of residents suffer from burnout. This is, they are emotionally drained, indifferent towards their patients and with a sense of low personal fulfillment at work. This article describes the contributions presented in LACRE about interventions or institutional programs designed to reduce burnout and promote self-care of residents...
October 2017: Revista Médica de Chile
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