keyword
MENU ▼
Read by QxMD icon Read
search

Dosage sensitivity

keyword
https://www.readbyqxmd.com/read/27918583/the-gene-regulatory-network-of-lens-induction-is-wired-through-meis-dependent-shadow-enhancers-of-pax6
#1
Barbora Antosova, Jana Smolikova, Lucie Klimova, Jitka Lachova, Michaela Bendova, Iryna Kozmikova, Ondrej Machon, Zbynek Kozmik
Lens induction is a classical developmental model allowing investigation of cell specification, spatiotemporal control of gene expression, as well as how transcription factors are integrated into highly complex gene regulatory networks (GRNs). Pax6 represents a key node in the gene regulatory network governing mammalian lens induction. Meis1 and Meis2 homeoproteins are considered as essential upstream regulators of Pax6 during lens morphogenesis based on their interaction with the ectoderm enhancer (EE) located upstream of Pax6 transcription start site...
December 2016: PLoS Genetics
https://www.readbyqxmd.com/read/27906426/continuous-monitoring-of-intracranial-pressure-for-prediction-of-postoperative-complications-of-hypertensive-intracerebral-hemorrhage
#2
S-X Yu, Q-S Zhang, Y Yin, Z Liu, J-M Wu, M-X Yang
OBJECTIVE: This study evaluates the value of continuous dynamic monitoring of intracranial pressure (ICP) in patients with hypertensive intracerebral hemorrhage to predict early postoperative complications. PATIENTS AND METHODS: Data from 80 patients treated in our hospital from February 2014 to February 2015 were analyzed. The patients all underwent decompressive craniectomies, and their ICP changes were monitored invasively and continuously for 1 to 7 days after surgery...
November 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27902742/chloroquine-sensitizes-nasopharyngeal-carcinoma-cells-but-not-nasoepithelial-cells-to-irradiation-by-blocking-autophagy
#3
Anna Makowska, Michael Eble, Kirsten Prescher, Mareike Hoß, Udo Kontny
BACKGROUND: Treatment of nasopharyngeal carcinoma requires the application of high dosages of radiation, leading to severe long-term complications in the majority of patients. Sensitizing tumor cells to radiation could be a means to increase the therapeutic window of radiation. Nasopharyngeal carcinoma cells display alterations in autophagy and blockade of autophagy has been shown to sensitize them against chemotherapy. METHODS: We investigated the effect of chloroquine, a known inhibitor of autophagy, on sensitization against radiation-induced apoptosis in a panel of five nasopharyngeal carcinoma cell lines and a SV40-transformed nasoepithelial cell line...
2016: PloS One
https://www.readbyqxmd.com/read/27900836/spectrofluorimetric-determination-of-certain-adrenergic-agonist-drugs-in-their-pure-forms-and-pharmaceutical-formulations-content-uniformity-test-application
#4
Khalid M Badr El-Din, Tamer Z Attia
A new, simple, sensitive and rapid spectrofluorimetric method has been developed for determination of certain adrenergic agonists such as isoxsuprine hydrochloride, ritodrine hydrochloride and etilefrine hydrochloride in their pure forms and pharmaceutical dosage forms. The method depends on micellar enhancement of the native fluorescence of investigated drugs by using 2% w/v sodium dodecyl sulfate (SDS) as an anionic surfactant. The enhanced fluorescence intensity of investigated drugs was measured at 305 nm after excitation at 278 nm...
November 29, 2016: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/27890838/preoperative-evaluation-of-the-renal-function-before-the-treatment-of-abdominal-aortic-aneurysms
#5
Raphael Coscas, Sandra Wagner, Eve Vilaine, Albane Sartorius, Isabelle Javerliat, Olivier Goeau-Brissonniere, Marc Coggia, Ziad Massy
OBJECTIVES: Chronic impaired renal function (IRC) constitutes a major risk factor of morbi-mortality during the treatment of an abdominal aortic aneurism (AAA). The inflammatory state due to the AAA could result in a reduction in the muscular mass and an over-estimation of the glomerular filtration rate (GFR) with the usual formulas. The objective of this study was to determine if the formulae used to evaluate the estimated GFR were adapted in patients with AAA. MATERIALS AND METHODS: Between August 2013 and November 2014, we conducted an exploratory study to evaluate the renal function before surgery for AAA in 28 patients...
November 24, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27887921/non-invasive-prenatal-diagnosis-of-thalassemias-using-maternal-plasma-cell-free-dna
#6
REVIEW
Irena Hudecova, Rossa W K Chiu
Non-invasive prenatal testing (NIPT) using maternal plasma cell free DNA has already reshaped the existing prenatal care system for pregnancies screened for common chromosomal aneuploidies. On the other hand, much progress has been made in developing NIPT for monogenic diseases. Thalassemia served as a disease model to develop strategies for NIPT of monogenic traits. One approach focuses on the detection or exclusion of paternally inherited fetal mutations that are absent from the mother's genome. The assessment of maternally inherited mutations in maternal plasma requires the use of highly sensitive DNA quantification techniques...
October 26, 2016: Best Practice & Research. Clinical Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/27884084/losartan-loaded-liposomes-improve-the-antitumor-efficacy-of-liposomal-paclitaxel-modified-with-ph-sensitive-peptides-by-inhibition-of-collagen-in-breast-cancer
#7
Tai Xia, Qin He, Kairong Shi, Yang Wang, Qianwen Yu, Li Zhang, Qianyu Zhang, Huile Gao, Lifang Ma, Ji Liu
The dense collagen network in tumors restricts the penetration of drugs into tumors. Free losartan could inhibit collagen, but it would cause hypotension at the dosage of 10 mg/kg/d. In this study, losartan was encapsulated in liposomes (LST-Lip) and the collagen inhibition ability of LST-Lip was investigated. Our results showed the blood pressure was not affected by LST-Lip at the dosage of 2.5 mg/kg every other day. The amount of Evans Blue in tumor in LST-Lip group was 1.98 times of that in control group...
November 25, 2016: Pharmaceutical Development and Technology
https://www.readbyqxmd.com/read/27883239/individually-dosed-omalizumab-an-effective-treatment-for-severe-peanut-allergy
#8
J Brandström, M Vetander, G Lilja, S G O Johansson, A-C Sundqvist, F Kalm, C Nilsson, A Nopp
BACKGROUND: Treatment with omalizumab has shown a positive effect on food allergies, but no dosages are established. Basophil allergen threshold sensitivity (CD-sens) can be used to objectively measure omalizumab treatment efficacy and correlates with the outcome of Double Blind Placebo Controlled Food Challenge to peanut. OBJECTIVE: To evaluate if individualized omalizumab treatment monitored by CD-sens could be an effective intervention for suppression of allergic reactions to peanut...
November 24, 2016: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/27882534/hybridizing-in-a-big-way
#9
William Hatchett
Gene regulation plays an important role in an organism's development and morphological evolution. However, the importance of regulatory divergence in speciation remains unclear. Hybrids between mammalian species often differ in size from their parents due to dramatic parent-of-origin growth effects (Vrana 2007; Brekke and Good 2014, Wolf et al. 2014). The parent-of-origin effects on growth are usually manifest in the placenta and embryo development stage, when the embryo is highly sensitive to gene dosage/expression (Haig 1996)...
November 24, 2016: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/27880013/on-demand-release-of-hydrosoluble-drugs-from-a-paramagnetic-porous-collagen-based-scaffold
#10
Simona Bettini, Valentina Bonfrate, Marta Madaghiele, Luca Salvatore, Zois Syrgiannis, Gabriele Giancane, Ludovico Valli
The specific design of a collagen scaffold containing iron oxide nanostructures capped by a TiO2 (anatase) layer is reported. The TiO2 shell is proposed with a dual role: as an innovative and biocompatible cross-linker agent, providing binding sites to the protein moiety, through the well-known TiO2 chemical affinity towards carboxyl groups, and as a protective surface layer from oxidation for the paramagnetic core. Simultaneously, the presence of the nanostructures confers to the collagen gel the sensitivity to an external stimulus, i...
November 23, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27873080/evaluation-of-the-drug-solubility-and-rush-ageing-on-drug-release-performance-of-various-model-drugs-from-the-modified-release-polyethylene-oxide-matrix-tablets
#11
Saeed Shojaee, Ali Nokhodchi, Mohammed Maniruzzaman
Hydrophilic matrix systems are currently some of the most widely used drug delivery systems for controlled-release oral dosage forms. Amongst a variety of polymers, polyethylene oxide (PEO) is considered an important material used in pharmaceutical formulations. As PEO is sensitive to thermal oxidation, it is susceptible to free radical oxidative attack. The aim of this study was to investigate the stability of PEO based formulations containing different model drugs with different water solubility, namely propranolol HCl, theophylline and zonisamide...
November 21, 2016: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/27871859/alpha2-3-sialyltransferase-iii-knockdown-sensitized-ovarian-cancer-cells-to-cisplatin-induced-apoptosis
#12
Xiaoyu Wang, Yiting Zhang, Haiyingjie Lin, Yan Liu, Yi Tan, Jie Lin, Fenze Gao, Shaoqiang Lin
Emerging evidence indicates that β-galactoside-α2,3-sialyltransferase III (ST3Gal3) involves in development, inflammation, neoplastic transformation, and metastasis. However, the role of ST3Gal3 in regulating cancer chemoresistance remains elusive. Herein, we investigated the functional effects of ST3Gal3 in cisplatin-resistant ovarian cancer cells. We found that the levels of ST3Gal3 mRNA differed significantly among ovarian cancer cell lines. HO8910PM cells that have high invasive and metastatic capacity express elevated ST3Gal3 mRNA and are resistant to cisplatin, comparing to SKOV3 cells that have a lower level of ST3Gal3 expression and are more chemosensitive to cisplatin...
November 18, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27866169/competitive-binding-by-transcription-factors-a-new-mechanism-for-mendelian-dominance-in-regulatory-genetic-pathways
#13
Adam H Porter, Norman A Johnson, Alexander Y Tulchinsky
We report a new mechanism for allelic dominance in regulatory genetic interactions that we call binding dominance. We investigated a biophysical model of gene regulation, where the fractional occupancy of a transcription factor (TF) on the cis-regulated promoter site it binds to is determined by binding energy (-ΔG) and TF dosage. Transcription and gene expression proceed when the TF is bound to the promoter. In diploids, individuals may be heterozygous at the cis-site, at the TF's coding region, or at the TF's own promoter, which determines allele-specific dosage...
November 18, 2016: Genetics
https://www.readbyqxmd.com/read/27864702/selective-spectrofluorimetric-method-with-enhanced-sensitivity-for-determination-of-silodosine-in-dosage-form-and-human-plasma-application-to-stability-studies-and-content-uniformity-testing
#14
Mahmoud A Omar, Abdel-Maaboud I Mohamed, Sayed M Derayea, Mohamed A Hammad, Abobakr A Mohamed
A novel, sensitive and selective spectrofluorimetric method has been developed and validated for determination of silodosine (SLD) in its dosage form and human plasma. The method is based on nucleophilic substitution reaction of SLD with 5-(dimethylamino) naphthalene-1-sulfonyl chloride (dansyl chloride) in presence of 5.0 × 10(-4) M sodium carbonate (pH 10.50) to yield a highly fluorescent derivative that was measured at 435 nm after excitation at 347 nm. The different experimental parameters affecting the development and stability of the reaction product were carefully studied and optimized...
November 19, 2016: Journal of Fluorescence
https://www.readbyqxmd.com/read/27862011/effective-reduction-of-acute-ethanol-withdrawal-by-the-tetracycline-derivative-tigecycline-in-female-and-male-dba-2j-mice
#15
Joseph M Martinez, Jessica A Groot, David C Curtis, Clayton L Allison, Patrick C Marquardt, Ashley N Holmes, David S Edwards, David R M Trotter, Peter J Syapin, Deborah A Finn, Susan E Bergeson
BACKGROUND: Alcohol use disorder (AUD) is a spectrum disorder characterized by mild to severe symptoms, including potential withdrawal signs upon cessation of consumption. Approximately five hundred thousand patients with AUD undergo clinically relevant episodes of withdrawal annually (New Engl J Med, 2003, 348, 1786). Recent evidence indicates potential for drugs that alter neuroimmune pathways as new AUD therapies. We have previously shown the immunomodulatory drugs, minocycline and tigecycline, were effective in reducing ethanol (EtOH) consumption in both the 2-bottle choice and drinking-in-the-dark paradigms...
December 2016: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/27859395/photodynamic-diagnosis-with-5-aminolevulinic-acid-for-intraoperative-detection-of-peritoneal-metastases-of-ovarian-cancer-a-feasibility-and-dose-finding-study
#16
Peter Hillemanns, Pauline Wimberger, Jessica Reif, Herbert Stepp, Rüdiger Klapdor
OBJECTIVE: With a prospective feasibility study, we aimed to analyse the effect of different time points for application and dosage of preoperative oral 5-aminolevulinic acid administration for photodynamic diagnosis of peritoneal metastases in ovarian cancer patients. MATERIALS AND METHODS: In this prospective cohort study patients were randomly divided into three different groups. 5-Aminolevulinic acid was orally administered 3-14 hours before surgery using a dosage of 1 mg/kg, 4-9 hours using 10 mg/kg, and 9-16 hours using 10 mg/kg, respectively...
November 16, 2016: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/27856053/reduction-of-nitrate-by-nay-zeolite-supported-fe-cu-fe-and-mn-fe-nanoparticles
#17
Yubin Zeng, Harold Walker, Qingzhi Zhu
Nano particles Fe, Cu/Fe and Mn/Fe supported on NaY zeolite (F@Y, CF@Y, and MF@Y) were prepared by two-step processes consisting of ion exchange and liquid-phase reduction. The characterization by XRD, SEM-EDX and BET-N2 adsorption demonstrated that Fe, Cu/Fe and Mn/Fe nano particles were successfully loaded onto NaY zeolite and exhibited larger BET surface area compared to nano-Fe(0) (nZVI). Laboratory experiments showed that nitrate removal by metals@Y in unbuffered conditions reached nearly 100% at a dosage of 4g/L after 6h of reaction...
November 10, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27843131/adsorptive-granulocyte-and-monocyte-apheresis-in-the-treatment-of-ulcerative-colitis-the-first-multicenter-study-in-china
#18
Ya-Min Lai, Wei-Yan Yao, Yao He, Xuan Jiang, Yu-Bei Gu, Min-Hu Chen, Yu-Lan Liu, Yao-Zong Yuan, Jia-Ming Qian
Background/Aims: Patients with active ulcerative colitis (UC) have elevated levels of activated myeloid-derived leukocytes as a source of inflammatory cytokines. The selective depletion of these leukocytes by adsorptive granulocyte/monocyte apheresis (GMA) with an Adacolumn should alleviate inflammation, promote remission and enhance drug efficacy. However, studies have reported contrasting efficacy outcomes based on patients' baseline demographic variables. This study was undertaken to understand the demographic features of GMA responders and nonresponders...
November 16, 2016: Gut and Liver
https://www.readbyqxmd.com/read/27831633/therapeutic-effect-of-tenecteplase-on-treatment-of-cerebral-arterial-thrombosis-a-meta-analysis
#19
Y Zang, J Hou, L-Y Wang
OBJECTIVE: To evaluate the clinical efficacy between tenecteplase (TNK) and alteplase (rt-PA). Furthermore, suitable dosage of TNK in cerebral arterial thrombosis treatment was explored. MATERIALS AND METHODS: The studies met with the predefined selection criteria were selected for the present study. The quality of each study was evaluated by Cochrane quality evaluation. The outcome indexes including early major neurological improvement (MNI), excellent recovery, good recovery, recanalization at 24 hours-complete or partial, symptomatic intracranial hemorrhage, any parenchymal hematoma and deaths were analyzed by using RevMan and Stata statistical software, under a random-effects model or a fixed-effects model...
October 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27829203/precision-combination-therapy-for-triple-negative-breast-cancer-via-biomimetic-polydopamine-polymer-core-shell-nanostructures
#20
Yanping Ding, Shishuai Su, Ruirui Zhang, Leihou Shao, Yinlong Zhang, Bin Wang, Yiye Li, Long Chen, Qun Yu, Yan Wu, Guangjun Nie
Photothermal-based combination therapy using functional nanomaterials shows great promise in eradication of aggressive tumors and improvement of drug sensitivity. The therapeutic efficacy and adverse effects of drug combinations depend on the precise control of timely tumor-localized drug release. Here a polymer-dopamine nanocomposite is designed for combination therapy, thermo-responsive drug release and prevention of uncontrolled drug leakage. The thermo-sensitive co-polymer poly (2-(2-methoxyethoxy) ethyl methacrylate-co-oligo (ethylene glycol) methacrylate)-co-2-(dimethylamino) ethyl methacrylate-b-poly (D, l-lactide-co-glycolide) is constructed into core-shell structured nanoparticles for co-encapsulation of two cytotoxic drugs and absorption of small interfering RNAs against survivin...
November 2, 2016: Biomaterials
keyword
keyword
99367
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"