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https://www.readbyqxmd.com/read/28618985/dendrimers-general-aspects-applications-and-structural-exploitations-as-prodrug-drug-delivery-vehicles-in-current-medicine
#1
Merina Mariyam, Kajal Ghosal, Anne George, Sabu Thomas, Nandakumar Kalarikkal, Mahima S Latha
Dendrimers are hyper branched macro molecules with well-defined structure and high degree of functionality on the surface. The dendrimer architecture allows control over properties such as shape, size, density, polarity, reactivity, solubility etc. This can be manipulated to design molecules with desired properties in biomedical applications. Recent advancement in correlating structure to biodegradability and invivo performance opens up new avenue for these molecules in biological applications like drug delivery and tissue engineering...
May 11, 2017: Mini Reviews in Medicinal Chemistry
https://www.readbyqxmd.com/read/28611319/assessing-alpha-tocopherol-levels-in-patients-with-keratocystic-odontogenic-tumor-a-cross-sectional-study
#2
Bhargavi Krishna Ayinampudi, Sushmita Bhargavi Varikoti, Pacha Venkat Baghirath, B Hari Vinay, Ch Gayathri, Ashalata Gannepalli
AIMS AND OBJECTIVES: A keratocystic odontogenic tumour (KCOT) is a benign uni- or multicystic, intraosseous tumour of odontogenic origin, with a characteristic lining of parakeratinized stratified squamous epithelium and potential for aggressive, infiltrative behaviour. Various studies in hamsters showed that, alpha-Tocopherol, which is an active biological form of Vitamin E, is a potent antioxidant known to inhibit tumour formation and also regression of established tumours. So, the aim of the present pilot study was to assess the levels of Alpha-Tocopherol(Vitamin E) in Patients with KCOT and compare them with Vitamin E levels in normal healthy individuals...
March 2017: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28599130/negligible-interaction-of-ru-phen-3-2-with-human-serum-albumin-makes-it-promising-for-a-reliable-invivo-assessment-of-the-tissue-oxygenation
#3
Dominik Belej, Zuzana Jurasekova, Michal Nemergut, Georges Wagnieres, Daniel Jancura, Veronika Huntosova
The interaction between a ruthenium - based water soluble oxygen probe ([Ru(Phen)3](2+), phen - phenanthroline) and human serum albumin (HSA) was investigated with the aim of describing the influence of HSA on the [Ru(Phen)3](2+) luminescence properties. Nowadays, several oxygen sensitive luminescent probes are used to determine the oxygen level in different compartments of living organisms. However, they can interact, depending on their hydrophilic/hydrophobic characters, with various serum proteins, and/or lipids, during their utilization for invivo oxygen measurement...
May 31, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/28588629/in-vitro-and-in-vivo-activity-of-artemisia-sieberi-against-trichomonas-gallinae
#4
M R Youssefi, M Abouhosseini Tabari, A A Moghadamnia
In Iranian folk medicine Artemisia sieberi has been used for treatment of parasite infections in human and animals. The present study was designed to evaluate the in vitro and in vivo effects of A. sieberi essential oil (EO) against Trichomonas gallinae. Trichomonas gallinae were recovered by wet mount method from infected native pigeons. The in vitro assays were accomplished in multi-well plates containing metronidazole (MTZ) as a standard antitrichomonal and EO in final concentrations of 2.5, 5, 10, 20, 50, and 100 μg/ml of culture medium containing 10(4) parasites...
2017: Iranian journal of veterinary research
https://www.readbyqxmd.com/read/28529065/brown-adipose-tissue-and-lipid-metabolism-imaging
#5
REVIEW
Andreas Paulus, Wouter van Marken Lichtenbelt, Felix M Mottaghy, Matthias Bauwens
PURPOSE: Brown adipose tissue (BAT) research has evolved from an underestimated to a fast developing field. Its assumed curing properties for the world wide epidemic obesity, and its related diseases, makes this tissue an interesting target for a broad amount of non-invasive molecular BAT tracers. Apart from (18)F-FDG PET/CT there are several methods to detect BAT and measure its metabolism in a more appropriate way. Especially interesting is the measure of lipid turnover, because fatty acids comprise the main fuel for active BAT...
May 18, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/28524239/oral-contraceptive-pills-risky-or-protective-in-case-of-trichinella-spiralis-infection
#6
Marwa A Hasby Saad, Dina A Radi, Eiman A Hasby
AIM: to investigate how Trichinella spiralis infection can be affected by contraceptive pills invivo. METHODS: included six groups of female Wistar rats; healthy, Trichinella infected, receiving combined contraceptive pills (COCPs), receiving progestin only pills (POPs), infected receiving COCPs and infected receiving POPs. Parasite burden was measured (two gender worm counts, gravidity, larvae/muscle and RCI). Histopathological examination, immunohistochemical detection of C-kit mast cells & Foxp3+ T-reg...
May 19, 2017: Parasite Immunology
https://www.readbyqxmd.com/read/28463479/phanerochaete-chrysosporium-multienzyme-catabolic-system-for-in-vivo-modification-of-synthetic-lignin-to-succinic-acid
#7
Chang-Young Hong, Sun-Hwa Ryu, Hanseob Jeong, Sung-Suk Lee, Myungkil Kim, In-Gyu Choi
Whole cells of the basidiomycete fungus Phanerochaete chrysosporium (ATCC 20696) were applied to induce the biomodification of lignin in an in vivo system. Our results indicated that P. chrysosporium has a catabolic system that induces characteristic biomodifications of synthetic lignin through a series of redox reactions, leading not only to the degradation of lignin but also to its polymerization. The reducing agents ascorbic acid and α-tocopherol were used to stabilize the free radicals generated from the ligninolytic process...
May 10, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28438938/a-tick-antivirulence-protein-potentiates-antibiotics-against-staphylococcus-aureus
#8
Nabil M Abraham, Lei Liu, Brandon L Jutras, Kristen Murfin, Ali Acar, Timur O Yarovinsky, Erica Sutton, Martin Heisig, Christine Jacobs-Wagner, Erol Fikrig
New strategies are needed to combat antibiotic resistance, especially against pathogens such as methicillin-resistant Staphylococcus aureus A tick antifreeze glycoprotein, IAFGP, possess potent anti-biofilm properties against a variety of clinical pathogens including S. aureus Synergy between IAFGP, or a peptide (P1) representative of a repeat region of the protein, with different antibiotics was assessed in vitro Antibiotics that synergized with either IAFPG or P1 were further evaluated in vivo using vertebrate and invertebrate infection models...
April 24, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28438061/the-pattern-and-magnitude-of-invivo-thrombin-generation-differ-in-women-with-preeclampsia-and-in-those-with-sga-fetuses-without-preeclampsia
#9
Offer Erez, Roberto Romero, Edi Vaisbuch, Juan Pedro Kusanovic, Shali Mazaki-Tovi, Tinnakorn Chaiworapongsa, Francesca Gotsch, Pooja Mittal, Samuel S Edwin, Chia-Ling Nhan-Chang, Nandor Gabor Than, Chong Jai Kim, Sun Kwon Kim, Lami Yeo, Moshe Mazor, Sonia S Hassan
OBJECTIVE: We aimed to determine the differences in the pattern and magnitude of thrombin generation between patients with preeclampsia (PE) and those with SGA. METHODS: This cross-sectional study included women in the following groups: 1) normal pregnancy (NP) (n = 49); 2) PE (n = 56); and 3) SGA (n = 28). Maternal plasma thrombin generation (TGA) was measured, calculating: a) lag time (LT); b) velocity index (VI); c) peak thrombin concentration (PTC); d) time-to-peak thrombin concentration (TPTC); and e) endogenous thrombin potential (ETP)...
April 24, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28411451/anisotropic-tough-double-network-hydrogel-from-fish-collagen-and-its-spontaneous-in%C3%A2-vivo-bonding-to-bone
#10
Md Tariful Islam Mredha, Nobuto Kitamura, Takayuki Nonoyama, Susumu Wada, Keiko Goto, Xi Zhang, Tasuku Nakajima, Takayuki Kurokawa, Yasuaki Takagi, Kazunori Yasuda, Jian Ping Gong
Soft supporting tissues in the human body, such as cartilages and ligaments, are tough materials and firmly fixed to bones. These soft tissues, once injured, cannot regenerate spontaneously in vivo. Developing tough and biocompatible hydrogels as artificial soft supporting tissues would substantially improve outcomes after soft tissue injury. Collagen is the main rigid component in soft connective tissues which is organized in various hierarchical arrays. We have successfully developed a novel class of collagen fibril-based tough hydrogels based on the double network (DN) concept using swim bladder collagen (SBC) extracted from Bester sturgeon fish...
July 2017: Biomaterials
https://www.readbyqxmd.com/read/28405827/mgmt-promoter-methylation-status-in-merkel-cell-carcinoma-in-vitro-versus-invivo
#11
Giuseppina Improta, Cathrin Ritter, Angela Pettinato, Valeria Vasta, David Schrama, Filippo Fraggetta, Jürgen C Becker
PURPOSE: Expression of O6-methylguanine-DNA methyltransferase (MGMT) in Merkel cell carcinoma (MCC) is very variable; thus, we tested whether this may be due to differential methylation of the MGMT gene promoter. METHODS: Quantitative analysis of MGMT mRNA and protein expression, as well as MGMT promoter methylation status, was performed in a series of tissue samples of MCC tumors, representing both primary and metastatic lesions, as well as in six MCC cell lines...
April 12, 2017: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/28394817/comparative-bone-regeneration-potential-studies-of-collagen-heparin-and-polydopamine-coated-multichannelled-bcp-granules
#12
Gun Hee Lee, Preeti Makkar, Kallyanshis Paul, Byong Taek Lee
The present work is a comparative assessment of the bone regeneration potentiality of bone substitutes comprised of bioactive polymer coated biphasic calcium phosphate (BCP) granules. The bone substitutes were primarily composed of multichanneled BCP granules which were coated separately with biochemical polymer coatings, namely collagen, heparin or polydopamine, using chemical methods. The morphological features and chemical structure of the granules and surface coatings were characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) respectively...
April 6, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28390086/virtual-screening-and-biological-evaluation-of-novel-antipyretic-compounds
#13
Thamires Quadros Froes, Miriam C C Melo, Gloria E P Souza, Marcelo Santos Castilho, Denis M Soares
Due to the absence of safety of the antipyretics to patients with cardiovascular dysfunction, new targets to treat inflammation have been pursued. mPGES-1 is a promising target because its inhibition would not cause the side-effects related to COX inhibition. To identify novel inhibitors of mPGES-1, we developed a ligand-based pharmacophore model that differentiates true inhibitors from decoys and enlightens the structure-activity relationships for known mPGES-1 inhibitors. The model (four hydrophobic centers, two hydrogen bond acceptor and two hydrogen bond donor points) was employed to select lead-like compounds from ZINC database for in vivo evaluation...
April 8, 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/28371660/exposure-of-heligmosomoides-polygyrus-and-trichuris-muris-to-albendazole-albendazole-sulfoxide-mebendazole-and-oxantel-pamoate-in%C3%A2-vitro-and-in%C3%A2-vivo-to-elucidate-the-pathway-of-drug-entry-into-these-gastrointestinal-nematodes
#14
Noemi Cowan, Charles Meier, Anna Neodo, Jennifer Keiser
Millions of people are treated with anthelmintics to control soil-transmitted helminth infections; yet, drug distribution in the plasma and gastrointestinal tract compartments and the pathway of drug uptake into gastrointestinal nematodes responsible for the pharmacological effect are unknown. We assessed the distribution and uptake of albendazole, albendazole sulfoxide, albendazole sulfone in the hookworm Heligmosomoides polygyrus in vitro and in vivo as well as the distribution and uptake of albendazole, mebendazole, and oxantel pamoate in the whipworm Trichuris muris in vitro and invivo...
March 24, 2017: International Journal for Parasitology, Drugs and Drug Resistance
https://www.readbyqxmd.com/read/28362770/pupil-segmentation-adaptive-optics-for-invivo-mouse-retinal-fluorescence-imaging
#15
Daniel J Wahl, Christine Huang, Stefano Bonora, Yifan Jian, Marinko V Sarunic
Adaptive Optics (AO) for scanning laser ophthalmoscopy enables high-resolution retinal imaging that can be used for preclinical research of diseases causing vision loss. Pupil Segmentation (PS) is an approach to wavefront-sensorless AO that acquires images within subregions across the imaging pupil to measure the wavefront slopes at the corresponding locations of the beam. We present PS-AO as an approach to correct ocular aberrations in ∼7  s, implemented to minimize respiratory motion from an anesthetized mouse...
April 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/28267666/rf-inhomogeneity-compensation-using-method-of-fourier-synthesis
#16
Navin Khaneja
In this paper, we propose a new method for design of composite pulses that are robust to rf-amplitude (rf-inhomogeneity). We call this, the method of Fourier synthesis. The method is general enough to design excitation, inversion, refocusing or arbitary flip angle pulses that are robust to rf-amplitude. The method can be tailored to have amplitude selective excitation. We experimentally show rf-compensation over a order of magnitude (20db) variation in rf-amplitude. The method is expected to find use in invivo NMR studies using surface coils, where there is large dispersion in rf-amplitude over the sample...
February 15, 2017: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/28223335/cooperation-of-musashi-2-numb-mdm2-and-p53-in-drug-resistance-and-malignant-biology-of-pancreatic-cancer
#17
Weiwei Sheng, Ming Dong, Chuanping Chen, Zixin Wang, Yunwei Li, Kewei Wang, Yuji Li, Jianping Zhou
Our earlier work showed that Musashi (MSI)-2 promoted the development of pancreatic cancer (PC) by down-regulating Numb, which prevented murine double-minute (MDM)-2-mediated p53 ubiquitin degradation. Thus, we investigate the relationship among MSI2, Numb, MDM2, and p53 in PC in vitro and invivo, an association that has not been reported to our knowledge. MSI2 had no relationship with mutant p53 (mtp53) and wild-type p53 (wtp53) in normal PC cells. However, in response to gemcitabine or cisplatin treatment, MSI2 silencing simultaneously down-regulated MDM2 and up-regulated Numb and wtp53 protein levels...
February 21, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28193696/astrocytic-orosomucoid-2-modulates-microglial-activation-and-neuroinflammation
#18
Myungjin Jo, Jong-Heon Kim, Gyunjee Song, Minchul Seo, Eun Mi Hwang, Kyoungho Suk
Orosomucoid (ORM) is an acute-phase protein that belongs to the immunocalin subfamily, a group of small-molecule binding proteins with immunomodulatory functions. Little is known about the role of ORM proteins in the central nervous system. The aim of the present study was to investigate the brain expression of ORM and its role in neuroinflammation. Expression of Orm2, but not Orm1 or Orm3, was highly induced in the mouse brain after systemic injection of lipopolysaccharide (LPS). Plasma levels of ORM2 were also significantly higher in patients with cognitive impairment than in normal subjects...
February 13, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28179526/a-sequence-independent-unstructured-internal-ribosome-entry-site-is-responsible-for-internal-expression-of-the-coat-protein-of-turnip-crinkle-virus
#19
Jared May, Philip Johnson, Huma Saleem, Anne E Simon
To maximize the coding potential of viral genomes, internal ribosome entry sites (IRES) can be used to bypass the traditional requirement of a 5' cap and some/all of the associated translation initiation factors. Although viral IRES typically contain higher-order RNA structure, an unstructured sequence of about 84 nucleotides (nt) immediately upstream of the Turnip crinkle virus (TCV) coat protein (CP) open reading frame (ORF) has been found to promote internal expression of the CP from the genomic RNA (gRNA) both in vitro and in vivo An absence of extensive RNA structure was predicted using RNA folding algorithms and confirmed by selective 2'-hydroxyl acylation analyzed by primer extension (SHAPE) RNA structure probing...
April 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28089609/de-immunized-and-functional-therapeutic-deft-versions-of-a-long-lasting-recombinant-alpha-interferon-for-antiviral-therapy
#20
Eduardo F Mufarrege, Sofía Giorgetti, Marina Etcheverrigaray, Frances Terry, William Martin, Anne S De Groot
Interferon α (IFN-α) exerts potent antiviral, immunomodulatory, and antiproliferative activity and have proven clinical utility in chronic hepatitis B and C virus infections. However, repeated IFN-α administration induces neutralizing antibodies (NAb) against the therapeutic in a significant number of patients. Associations between IFN-α immunogenicity and loss of efficacy have been described. So as to improve the in vivo biological efficacy of IFN-α, a long lasting hyperglycosylated protein (4N-IFN) derived from IFN-α2b wild type (WT-IFN) was developed...
March 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
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