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https://www.readbyqxmd.com/read/28926265/tobacco-mosaic-virus-delivered-cisplatin-restores-efficacy-in-platinum-resistant-ovarian-cancer-cells
#1
Christina E Franke, Anna E Czapar, Ravi B Patel, Nicole F Steinmetz
Platinum resistance in ovarian cancer is the major determinant of disease prognosis. Resistance can first appear at the onset of disease or develop in response to platinum-based chemotherapy. Due to poor response to alternate chemotherapies and lack of targeted therapies, there is an urgent clinical need for a new avenue toward treatment of platinum-resistant (PR) ovarian cancer. Nanoscale delivery systems hold potential to overcome resistance mechanisms. In this work, we present tobacco mosaic virus (TMV) as a nanocarrier for cisplatin for treatment of PR ovarian cancer cells...
September 19, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28925698/an-ultraviolet-resonance-raman-spectroscopic-study-of-cisplatin-and-transplatin-interactions-with-genomic-dna
#2
Jiafeng Geng, Mena Aioub, Mostafa A El-Sayed, Bridgette A Barry
Ultraviolet resonance Raman (UVRR) spectroscopy is a label-free method to define biomacromolecular interactions with anticancer compounds. Using UVRR, we describe the binding interactions of two Pt(II) compounds, cisplatin (cis-diamminedichloroplatinum(II)) and its isomer, transplatin, with nucleotides and genomic DNA. Cisplatin binds to DNA and other cellular components and triggers apoptosis, whereas transplatin is clinically ineffective. Here, a 244 nm UVRR study shows that purine UVRR bands are altered in frequency and intensity when mononucleotides are treated with cisplatin...
September 19, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28921908/biphasic-insulin-aspart-30-reduces-glycemic-variability-to-a-greater-degree-than-insulin-detemir-a-randomized-controlled-trial-of-once-daily-insulin-regimens-using-continuous-glucose-monitoring
#3
Daisuke Tsujino, Rimei Nishimura, Yoshiko Onda, Chiaki Seo, Kiyotaka Ando, Kazunori Utsunomiya
INTRODUCTION: We compared the efficacy of insulin detemir and biphasic insulin aspart-30 given in the morning as an add-on to oral hypoglycemic agents (OHAs) in type 2 diabetic patients. MATERIALS AND METHODS: This study enrolled 30 patients with poorly controlled type 2 diabetes (8%≤HbA1c<11%) being treated with OHA mono- or combination therapy with biguanides, sulfonylureas, or thiazolidinediones. The patients were randomly assigned to insulin detemir (group D) or insulin aspart-30 (group A) given in the morning as add-on to OHAs...
September 16, 2017: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/28919451/biphasic-modulation-of-neuro-and-interrenal-steroidogenesis-in-juvenile-african-sharptooth-catfish-clarias-gariepinus-exposed-to-waterborne-di-2-ethylhexyl-phthalate
#4
Augustine Arukwe, Oju R Ibor, Aina O Adeogun
Receptor (i.e genomic) and non-receptor (or non-genomic) effects of endocrine toxicology have received limited or almost non-existent attention for tropical species and regions. In the present study, we have studied the effects of di-(2-ethylhexyl) phthalate (DEHP) on neuro- and interrenal steroidogenesis of the African catfish (Clarias gariepinus) using molecular, immunochemical and physiological approaches. Juvenile fish (mean weight and length: 5.6 ± 0.6g and 8.2 ± 1.2 cm, respectively), were randomly distributed into ten 120 L rectangular glass tanks containing 60 L of dechlorinated tap water, at 50 fish per exposure group...
September 14, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28919384/the-combination-of-gis-and-biphasic-to-better-predict-in-vivo-dissolution-of-bcs-class-iib-drugs-ketoconazole-and-raloxifene
#5
Yasuhiro Tsume, Naoto Igawa, Adam J Drelich, Gregory E Amidon, Gordon L Amidon
The formulation developments and the in vivo assessment of Biopharmaceutical Classification System (BCS) class II drugs are challenging due to their low solubility and high permeability in the human gastrointestinal (GI) tract. Since the GI environment influences the drug dissolution of BCS class II drugs, the human GI characteristics should be incorporated into the in vitro dissolution system to predict bioperformance of BCS class II drugs. An absorptive compartment may be important in dissolution apparatus for BCS class II drugs, especially for bases (BCS IIb) because of high permeability, precipitation and supersaturation...
September 14, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28918839/prostaglandin-e2-induces-prorenin-dependent-activation-of-pro-renin-receptor-and-upregulation-of-cyclooxygenase-2-in-collecting-duct-cells
#6
Nicolás Salinas-Parra, Cristian Reyes-Martínez, Minolfa C Prieto, Alexis A Gonzalez
BACKGROUND: Prostaglandin E2 (PGE2) regulates renin expression in renal juxtaglomerular cells. PGE2 acts through E-prostanoid (EP) receptors in the renal collecting duct (CD) to regulate sodium and water balance. CD cells express EP1 and EP4, which are linked to protein kinase C (PKC) and PKA downstream pathways, respectively. Previous studies showed that the presence of renin in the CD, and that of PKC and PKA pathways, activate its expression. The (pro)renin receptor (PRR) is also expressed in CD cells, and its activation enhances cyclooxygenase-2 (COX-2) through extracellular signal-regulated kinase (ERK)...
September 2017: American Journal of the Medical Sciences
https://www.readbyqxmd.com/read/28918418/new-aspects-in-the-pathomechanism-of-diseases-of-civilization-particularly-psychosomatic-disorders-part-1-theoretical-background-of-a-hypothesis
#7
Andras Sikter, Zoltan Rihmer, Roberto de Guevara
The stress defence-cascade is mostly not biphasic as Cannon thought, the sympathicotonic stress response is preceded by a vagotonic phase called freeze response. Alteration of the carbon dioxide level plays an important role during defence-cascade as its changes interfere with stress hormones, e.g. with catecholamines, thus affecting the degree of arousal. In case of humans, learned behaviour dominates instead of instinctive, so the fight-or-flight often lags; the consequence can be persistent hypocapnia or hypercapnia...
June 2017: Neuropsychopharmacologia Hungarica
https://www.readbyqxmd.com/read/28917911/injectable-glycosaminoglycan-protein-nano-complex-in-semi-interpenetrating-networks-a-biphasic-hydrogel-for-hyaline-cartilage-regeneration
#8
Janani Radhakrishnan, Anuradha Subramanian, Swaminathan Sethuraman
Articular hyaline cartilage regeneration remains challenging due to its less intrinsic reparability. The study develops injectable biphasic semi-interpenetrating polymer networks (SIPN) hydrogel impregnated with chondroitin sulfate (ChS) nanoparticles for functional cartilage restoration. ChS loaded zein nanoparticles (∼150nm) prepared by polyelectrolyte-protein complexation were interspersed into injectable SIPNs developed by blending alginate with poly(vinyl alcohol) and calcium crosslinking. The hydrogel exhibited interconnected porous microstructure (39...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28917889/fabrication-of-cellulose-nanocrystal-from-carex-meyeriana-kunth-and-its-application-in-the-adsorption-of-methylene-blue
#9
Xue Yang, Hui Liu, Fuyi Han, Shuai Jiang, Lifang Liu, Zhaopeng Xia
Cellulose nanocrystal (CNC) was extracted from Carex meyeriana Kunth (CMK) by a combination of TEMPO oxidation and mechanical homogenization method, and used to remove methylene blue (MB) from aqueous solution. After alkali-oxygen treatment, the aqueous biphasic system (polyethylene glycol/inorganic salt) was applied to further remove lignin from CMK. The characteriazation of CNC, and the effects of H2O2 dosage, CNC dosage, adsorption time, and initial MB concentration on the MB removal capacity of CNC were investigated...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28916496/designer-bacteria-as-intratumoural-enzyme-biofactories
#10
Panos Lehouritis, Glenn Hogan, Mark Tangney
Bacterial-directed enzyme prodrug therapy (BDEPT) is an emerging form of treatment for cancer. It is a biphasic variant of gene therapy in which a bacterium, armed with an enzyme that can convert an inert prodrug into a cytotoxic compound, induces tumour cell death following tumour-specific prodrug activation. BDEPT combines the innate ability of bacteria to selectively proliferate in tumours, with the capacity of prodrugs to undergo contained, compartmentalised conversion into active metabolites in vivo. Although BDEPT has undergone clinical testing, it has received limited clinical exposure, and has yet to achieve regulatory approval...
September 12, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/28916442/acute-stress-promotes-post-injury-brain-regeneration-in-fish
#11
Michael S Sinyakov, Amihai Haimovich, Ramy R Avtalion
The central nervous system and the immune system, the two major players in homeostasis, operate in the ongoing bidirectional interaction. Stress is the third player that exerts strong effect on these two 'supersystems'; yet, its impact is studied much less. In this work employing carp model, we studied the influence of preliminary stress on neural and immune networks involved in post-injury brain regeneration. The relevant in-vivo models of air-exposure stress and precisely directed cerebellum injury have been developed...
September 12, 2017: Brain Research
https://www.readbyqxmd.com/read/28915830/biological-effects-of-combined-resveratrol-and-vitamin-d3-on-ovarian-tissue
#12
Francesca Uberti, Vera Morsanuto, Silvio Aprile, Sabrina Ghirlanda, Ian Stoppa, Andrea Cochis, Giorgio Grosa, Lia Rimondini, Claudio Molinari
BACKGROUND: Resveratrol (3,5,4'-trihydroxy-trans-stilbene) is a natural antioxidant polyphenol able to exert a wide range of biological effect on several tissues. Despite its important beneficial properties, it has a low water solubility, which limits its therapeutic applications in humans. Resveratrol also acts as a phytoestrogen that modulates estrogen receptor (ER)-mediated transcription. In addition, it has been shown that ovarian tissues benefit greatly from vitamin D3, which exerts its beneficial effects through VDR receptors...
September 15, 2017: Journal of Ovarian Research
https://www.readbyqxmd.com/read/28915032/ion-pair-formation-between-tertiary-aliphatic-amines-and-perchlorate-in-the-biphasic-water-dichloromethane-system
#13
Denis Badocco, Valerio Di Marco, Alfonso Venzo, Marco Frasconi, Diego Frezzato, Paolo Pastore
The ability of aliphatic amines (AA), namely tripropylamine (TPrA), trisobutylamine (TisoBuA), and tributylamine (TBuA), to form ion pairs with perchlorate anion (ClO4-) in biphasic aqueous/dichloromethane (CH2Cl2) mixtures with ClO4- 0.1 M has been demonstrated by GC with flame ionization (FID) and mass detectors (MS), and by NMR measurements. The extraction efficiency of the AA to the organic phase was modelled by equations which were used to fit the experimental GC data, allowing to determine values for KP (partition constant of the free AA), K(IP) (formation constant of the ion pair), and KP(IP) (partition constant of the ion pair), for TPrA, TisoBuA, TBuA at 25 °C...
September 15, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28914295/a-novel-photo-active-cd-1-4-benzene-dicarboxylate-metal-organic-framework-templated-using-ru-ii-2-2-bipyridine-3-2-synthesis-and-photophysics-of-rwlc-5
#14
Randy W Larsen, Jacob M Mayers, Lukasz Wojtas
The development of photoactive porous materials is of significant importance for applications ranging from sustainable energy to pharmaceutical development and catalysis. A particularly attractive class of photo-active materials is the metal-organic framework (MOF)-based platform in which the photo-active elements are components of the framework itself or photo-active guests encapsulated within the MOF cavities. It has now been demonstrated that the photo-active [Ru(2,2'-bipyridine)3](2+) (RuBpy) complex can template the formation of MOFs with varying three dimensional structures...
September 15, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28913927/the-efficacy-and-safety-of-a-monophasic-hyaluronic-acid-filler-in-the-correction-of-nasolabial-folds-a-randomized-multicenter-single-blinded-split-face-study
#15
Hyun Jung Kwon, Eun Jung Ko, Sun Young Choi, Eun Ja Choi, Yu-Jin Jang, Beom Joon Kim, Yang Won Lee
BACKGROUND: The different rheological properties of hyaluronic acid (HA) filler reflect their specific manufacturing processes and resultant physicochemical characteristics. However, there are few researches about the relationship between product differences and clinical outcome when HA fillers are used for nasolabial folds (NLFs). AIMS: This study sought to compare the rheological properties, efficacy and safety of a monophasic HA filler, and a well-studied biphasic HA filler, in the treatment of NLFs...
September 14, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28912879/a-crossover-study-of-the-combination-therapy-of-metformin-and-exenatide-or-biphasic-insulin-aspart-30-in-overweight-or-obese-patients-newly-diagnosed-with-type-2-diabetes-mellitus
#16
Huibiao Quan, Huachuan Zhang, Weiping Wei, Tuanyu Fang, Daoxiong Chen, Kaining Chen
The aim of the present study was to explore the effects of various combinations of exenatide, metformin (MET) and biphasic insulin aspart 30 (BIA30) on type 2 diabetes mellitus (T2DM). Two hundred overweight or obese patients newly diagnosed with T2DM were evenly randomized into two groups: A (twice daily for all: Phase I, 5 µg exenatide + 0.5 g MET for 4 weeks, then 10 µg exenatide + 0.5 g MET for 8 weeks; Phase II, 0.5 g MET for 12 weeks; Phase III, 0.3-0.4 U/kg/day BIA30 + 0.5 g MET for 12 weeks) and B (Phases I, II, III matched the phases III, II and I in group A)...
October 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28912809/the-biphasic-effect-of-vitamin-d-on-the-musculoskeletal-and-cardiovascular-system
#17
REVIEW
Armin Zittermann
This narrative review summarizes beneficial and harmful vitamin D effects on the musculoskeletal and cardiovascular system. Special attention is paid to the dose-response relationship of vitamin D with clinical outcomes. In infants and adults, the risk of musculoskeletal diseases is highest at circulating 25-hydroxyvitamin D (25OHD) concentrations below 25 nmol/L and is low if 40-60 nmol/L are achieved. However, evidence is also accumulating that in elderly people the risk of falls and fractures increases again at circulating 25OHD levels > 100 nmol/L...
2017: International Journal of Endocrinology
https://www.readbyqxmd.com/read/28910667/properties-of-afterdischarges-from-electrical-stimulation-in-patients-with-epilepsy
#18
Chang Liu, Tao Yu, Zhi-Wei Ren, Cui-Ping Xu, Xue-Yuan Wang, Liang Qiao, Duan-Yu Ni, Guo-Jun Zhang, Yong-Jie Li
OBJECTIVE: To investigate the properties of afterdischarges (ADs) from intracerebral electrical stimulation (ES) in patients with epilepsy who underwent stereotactic electroencephalography (SEEG) and determine the relationship between epileptogenic zone (EZ) or irritative zone (IZ) and ADs. METHODS: We retrospectively analyzed 10 patients with intractable epilepsy who underwent SEEG. ESs were delivered following the given parameters: bipolar, biphasic, 50Hz, 0.2ms pulse duration, 0...
September 7, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28904578/rosette-forming-glioneuronal-tumor-a-rare-posterior-fossa-tumor-in-an-adolescent
#19
Goutam Bera, Amitabha Das, Sandip Chatterjee, Uttara Chatterjee
Rosette-forming glioneuronal tumor (RGNT) is a rare variety of slow growing mixed glioneuronal tumor involving primarily fourth ventricular region and occurring predominantly in young adults. We present a case of a 16-year-old boy who presented with dizziness and occipital headache. On radiological evaluation, a fairly large hypodense posterior fossa mass lesion in relation to the left side of the vermis, with a large cystic component was found. Surgical resection of the tumor was performed. Histopathological examination showed a biphasic tumor composed of bland neurocytic cells, arranged in the form of neurocytic rosettes along with glial areas resembling low-grade glioma...
April 2017: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/28902902/multiscale-biphasic-modelling-of-peritumoural-collagen-microstructure-the-effect-of-tumour-growth-on-permeability-and-fluid-flow
#20
Peter A Wijeratne, John H Hipwell, David J Hawkes, Triantafyllos Stylianopoulos, Vasileios Vavourakis
We present an in-silico model of avascular poroelastic tumour growth coupled with a multiscale biphasic description of the tumour-host environment. The model is specified to in-vitro data, facilitating biophysically realistic simulations of tumour spheroid growth into a dense collagen hydrogel. We use the model to first confirm that passive mechanical remodelling of collagen fibres at the tumour boundary is driven by solid stress, and not fluid pressure. The model is then used to demonstrate the influence of collagen microstructure on peritumoural permeability and interstitial fluid flow...
2017: PloS One
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