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https://www.readbyqxmd.com/read/28088043/hplc-uv-method-for-simultaneous-determination-of-mk-1775-and-azd-7762-in-both-acetonitrile-aqueous-solution-and-mouse-plasma
#1
REVIEW
Kareem Ebeid, Giang N Ho, Aliasger K Salem
A sensitive and precise method is described for the simultaneous determination of two small molecule kinase inhibitors: MK-1775 (MK) and AZD-7762 (AZD), in acetonitrile (ACN)-aqueous solution and in mouse plasma. A Nova-Pak C18 reversed phase column (3.9mm×150mm, 4μm, 60Å) was utilized in the separation using an isocratic mobile phase of 0.1% v/v triethylamine in phosphate buffer (pH=7.4): acetonitrile (ACN) (60:40, v/v), at a flow rate of 0.8mL/min. Detection wavelength was set at 310nm for both MK and AZD, and 431nm for the internal standard sunitinib (SUN)...
December 30, 2016: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28081501/isolation-characterization-using-lc-esi-qtof-nmr-and-in-vitro-cytotoxicity-assay-of-niclosamide-forced-degradation-products
#2
Johnsirani P, Vishnuvardhan Ch, Lingesh A, Naidu V G M, Naveen Ch, Satheeshkumar N
The present study describes the isolation, characterization and in vitro cytotoxic effect of all forced degradation products of niclosamide (NCM) an anthelmintic class of drug used specifically to treat tapeworms. NCM was subjected to forced degradation involving hydrolysis (acidic, alkaline and neutral), oxidative, photolysis and thermal stress, as per ICH (Q1A (R2)) suggested conditions. The drug under hydrolytic (acidic and basic) conditions showed extensive degradation, while it was stable under neutral hydrolytic, oxidative, photolytic and thermal stress conditions...
January 3, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28081270/outcome-and-treatment-effects-in-stroke-associated-with-acute-cervical-ica-occlusion
#3
Michael Gliem, John-Ih Lee, Aurica Barckhan, Bernd Turowski, Hans-Peter Hartung, Sebastian Jander
BACKGROUND: Endovascular therapy (EVT) with stent retrievers in addition to i.v. thrombolysis (IVT) has proven effective in acute stroke patients with middle cerebral artery (MCA, M1 segment) and distal internal carotid artery (ICA) occlusion. Limited data exist concerning acute cervical ICA occlusion, either alone or in combination with intracranial ICA occlusion (tandem occlusion). Therefore we analyzed outcome and treatment effects in stroke associated with cervical ICA occlusion, with specific focus on the impact of intracranial ICA or M1 patency...
2017: PloS One
https://www.readbyqxmd.com/read/28081031/intracranial-hemorrhage-recurrence-on-vitamin-k-antagonist-severity-of-the-first-episode-and-hasbled-score-fail-to-identify-high-risk-patients-from-the-chirone-study
#4
Daniela Poli, Emilia Antonucci, Francesco Dentali, Sophie Testa, Gualtiero Palareti
The most feared complication of vitamin K antagonists (VKAs) treatment is intracranial hemorrhage (ICH). The previously published CHIRONE Study fails to identify risk factors associated with ICH recurrence after VKAs resumption. The aim of this secondary analysis of the study is to evaluate if patients who need surgery or with severe neurological sequelae after the first episode show a higher risk of ICH recurrence. The HASBLED score was used to stratify bleeding risk and to evaluate the distribution of recurrence in relation to each class of risk...
January 2017: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
https://www.readbyqxmd.com/read/28079139/blood-occludin-level-as-a-potential-biomarker-for-early-blood-brain-barrier-damage-following-ischemic-stroke
#5
Rong Pan, Kewei Yu, Theodore Weatherwax, Handong Zheng, Wenlan Liu, Ke Jian Liu
Concern about intracerebral hemorrhage (ICH) is the primary reason for withholding tPA therapy from patients with ischemic stroke. Early blood brain barrier (BBB) damage is the major risk factor for fatal post-thrombolysis ICH, but rapidly assessing BBB damage before tPA administration is highly challenging. We recently reported that ischemia induced rapid degradation of tight junction protein occludin in cerebromicrovessels. The present study investigates whether the cleaved occludin is released into the blood stream and how blood occludin levels correlate to the extent of BBB damage using a rat model of ischemic stroke...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28070645/middle-cerebral-artery-aneurysms-with-intracerebral-hematoma-the-impact-of-side-and-volume-on-final-outcome
#6
Ondrej Navratil, Kamil Duris, Vilem Juran, Eduard Neuman, Karel Svoboda, Martin Smrcka
BACKGROUND: Middle cerebral artery aneurysms (MCA aneurysms) belong to the most frequent type of intracranial aneurysms forming an intracerebral hematoma. The consequences of the hematoma-the laterality, the impact of ICH volume and size of the aneurysm with the final outcome of these patients had not been studied in detail in this location, and we focused on the analysis of these factors. METHODS: Patients with MCA aneurysms and associated intracerebral hematomas with a volume ≥10 ml were studied; these were treated from January 2006 to December 2015...
January 9, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28069357/control-strategies-for-drug-product-continuous-direct-compression-state-of-control-product-collection-strategies-and-startup-shutdown-operations-for-the-production-of-clinical-trial-materials-and-commercial-products
#7
Ahmad Almaya, Lawrence De Belder, Robert Meyer, Karthik Nagapudi, Hung-Ren Homer Lin, Ian Leavesley, Jayanthy Jayanth, Gurjit Bajwa, James DiNunzio, Anthony Tantuccio, Dan Blackwood, Admassu Abebe
Continuous Manufacturing (CM) has emerged in the pharmaceutical industry as a paradigm shift with significant advantages related to cost, efficiency, flexibility and higher assurance of quality. The inherent differences from batch processes justify examining the CM control strategy more holistically. This paper describes the current thinking for the control and implementation of CM, using the example of a direct compression process and taking into consideration the ICH Q10 definition of "state of control" and process validation requirements...
January 6, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28066914/cortical-hemorrhage-associated-neurological-deficits-and-tissue-damage-in-mice-are-ameliorated-by-therapeutic-treatment-with-nicotine
#8
Junpei Anan, Masanori Hijioka, Yuki Kurauchi, Akinori Hisatsune, Takahiro Seki, Hiroshi Katsuki
Intracerebral hemorrhage (ICH) is associated with diverse sets of neurological symptoms and prognosis, depending on the site of bleeding. Relative rate of hemorrhage occurring in the cerebral cortex (lobar hemorrhage) has been increasing, but there is no report on effective pharmacotherapeutic approaches for cortical hemorrhage either in preclinical or clinical studies. The present study aimed to establish an experimental model of cortical hemorrhage in mice for evaluation of effects of therapeutic drug candidates...
January 9, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/28064406/up-regulation-of-vps4a-promotes-neuronal-apoptosis-after-intracerebral-hemorrhage-in-adult-rats
#9
Jianbing Ren, Debin Yuan, Lili Xie, Xuelei Tao, Chenwei Duan, Yifeng Bao, Yunfeng He, Jianbin Ge, Hongjian Lu
Vps4, vacuolar protein sorting 4, belongs to ATPases Associated with diverse cellular Activities (AAA) protein family which is made up of Vps4A and Vps4B. Previous studies demonstrated that Vps4A plays vital roles in diverse aspects such as virus budding, the efficient transport of H-Ras to the PM (plasma membrane) and the involvement in the MVB (multivesiculate bodies) pathway. Interestingly, Vps4A is also expressed in the brain. However, the distribution and function of Vps4A in ICH diseases remain unclear...
January 7, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/28063097/ideal-cardiovascular-health-and-liver-enzyme-levels-in-european-adolescents-the-helena-study
#10
Idoia Labayen, Jonatan R Ruiz, Inge Huybrechts, Francisco B Ortega, Manuel Castillo, Michael Sjöstrom, Marcela González-Gross, Yannis Manios, Kurt Widhalm, Anthony Kafatos, Christina Breidenassel, Gerardo Rodríguez, Jean Dallongeville, Frédéric Gottrand, Luis A Moreno
There is an increasing interest for the role of liver enzymes as predictors of non-liver-related morbidity and mortality. The American Heart Association (AHA) described the ideal cardiovascular health concept as a score of seven cardiovascular health behaviors and factors that can be used to monitor and predict ideal cardiovascular health over time. This study aimed to examine the association of the ideal cardiovascular health (ICH), as defined by the AHA, with liver enzyme levels in European adolescents. A total of 637 adolescents (54...
January 6, 2017: Journal of Physiology and Biochemistry
https://www.readbyqxmd.com/read/28062218/mirna-144-induces-microglial-autophagy-and-inflammation-following-intracerebral-hemorrhage
#11
Anyong Yu, Tianxi Zhang, Wenyi Zhong, Haizhen Duan, Song Wang, Peng Ye, Juan Wang, Shanchuan Zhong, Zhao Yang
Autophagic activation mediated inflammation contributes to brain injury of intracerebral hemorrhage (ICH). MiRNAs play a key role in inflammation, which negatively and posttranscriptionally regulate gene expression and function. Modulating the mTOR signal, a central regulator of autophagy, could be of great significance for ICH. However, the specific of miRNA is unknown. In the current study, we detected the miRNA-144 expression, autophagic activity and inflammation of microglia in ICH. We also knocked down endogenous miRNA-144 to regulate autophagy and inflammation in ICH...
January 3, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28060219/multicenter-study-of-adverse-events-after-intravenous-tissue-type-plasminogen-activator-treatment-of-acute-ischemic-stroke
#12
Hannah Fernandez-Gotico, Tiffany Lightfoot, Melissa Meighan
BACKGROUND AND PURPOSE: The approved treatment by the Food and Drug Administration for acute ischemic stroke is intravenous tissue-type plasminogen activator (IV tPA). After IV tPA administration, patients are monitored for adverse events using an American Heart Association/American Stroke Association guideline instituted in 1996. There is limited evidence describing the safest and most efficient method to monitor patients during the first 24 hours after tPA administration. Although the overall rates of adverse events have been reported, the time when patients may be at most risk for an event has not been studied...
February 2017: Journal of Neuroscience Nursing: Journal of the American Association of Neuroscience Nurses
https://www.readbyqxmd.com/read/28057482/distinguishing-between-expert-and-statistical-systems-for-application-under-ich-m7
#13
Chris Barber, Thierry Hanser, Philip Judson, Richard Williams
The ICH M7 guideline for the identification of DNA reactive (genotoxic) impurities draws a distinction between expert and statistical systems. This paper describes factors that can help discriminate between the two systems and how to avoid co-developing them in a way that undermines either their independence or the orthogonality expected by the guidelines.
January 2, 2017: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/28054290/treatment-of-hyponatremia-in-patients-with-acute-neurological-injury
#14
Theresa Human, Aaron M Cook, Brian Anger, Kathleen Bledsoe, Amber Castle, David Deen, Haley Gibbs, Christine Lesch, Norah Liang, Karen McAllen, Christopher Morrison, Dennis Parker, A Shaun Rowe, Denise Rhoney, Kiranpal Sangha, Elena Santayana, Scott Taylor, Eljim Tesoro, Gretchen Brophy
BACKGROUND: Little data exist regarding the practice of sodium management in acute neurologically injured patients. This study describes the practice variations, thresholds for treatment, and effectiveness of treatment in this population. METHODS: This retrospective, multicenter, observational study identified 400 ICU patients, from 17 centers, admitted for ≥48 h with subarachnoid hemorrhage (SAH), traumatic brain injury (TBI), intraparenchymal hemorrhage, or intracranial tumors between January 1, 2011 and July 31, 2012...
January 4, 2017: Neurocritical Care
https://www.readbyqxmd.com/read/28052979/prevalence-incidence-and-mortality-of-stroke-in-china-results-from-a-nationwide-population-based-survey-of-480-687-adults
#15
Wenzhi Wang, Bin Jiang, Haixin Sun, Xiaojuan Ru, Dongling Sun, Linhong Wang, Limin Wang, Yong Jiang, Yichong Li, Yilong Wang, Zhenghong Chen, Shengping Wu, Yazhuo Zhang, David Wang, Yongjun Wang, Valery L Feigin
BACKGROUND: -China bears the biggest stroke burden in the world. However, little is known about the current prevalence, incidence, and mortality of stroke at the national level, and the trend in the last 30 years. METHODS: -In 2013 a nationally-representative door-to-door survey was conducted in 155 urban and rural centres in 31 provinces in China, totalling 480,687 adults aged ≥20 years. All stroke survivors were considered as prevalent stroke cases at the prevalent time (August 31, 2013)...
January 4, 2017: Circulation
https://www.readbyqxmd.com/read/28049196/refining-prognosis-for-intracerebral-hemorrhage-by-early-reassessment
#16
Matthew B Maas, Brandon A Francis, Rajbeer S Sangha, Bryan D Lizza, Eric M Liotta, Andrew M Naidech
BACKGROUND: Prognostic assessments, which are crucial for decision-making in critical illnesses, have shown unsatisfactory reliability. We compared the accuracy of a widely used prognostic score against a model derived from clinical data obtained 5 days after admission for patients with intracerebral hemorrhage (ICH), a condition for which prognostication has proven notoriously challenging and prone to bias. METHODS: Patients enrolled in a prospective observational cohort study of spontaneous ICH underwent hourly Glasgow Coma Scale (GCS) assessment...
January 4, 2017: Cerebrovascular Diseases
https://www.readbyqxmd.com/read/28049189/functional-long-term-outcome-after-left-versus-right-sided-intracerebral-hemorrhage
#17
Vanessa D Beuscher, Joji B Kuramatsu, Stefan T Gerner, Julia Köhn, Hannes Lücking, Stephan P Kloska, Hagen B Huttner
BACKGROUND AND PURPOSE: Hemispheric location might influence outcome after intracerebral hemorrhage (ICH). INTERACT suggested higher short-term mortality in right hemispheric ICH, yet statistical imbalances were not addressed. This study aimed at determining the differences in long-term functional outcome in patients with right- vs. left-sided ICH with a priori-defined sub-analysis of lobar vs. deep bleedings. METHODS: Data from a prospective hospital registry were analyzed including patients with ICH admitted between January 2006 and August 2014...
January 4, 2017: Cerebrovascular Diseases
https://www.readbyqxmd.com/read/28049058/development-and-validation-of-stability-indicating-hplc-methods-for-related-substances-and-assay-analyses-of-amoxicillin-and-potassium-clavulanate-mixtures
#18
Esen Bellur Atici, Yücel Yazar, Çağan Ağtaş, Nurten Ridvanoğlu, Bekir Karlığa
Antibacterial combinations consisting of the semisynthetic antibiotic amoxicillin (amox) and the β-lactamase inhibitor potassium clavulanate (clav) are commonly used and several chromatographic methods were reported for their quantification in mixtures. In the present work, single HPLC method for related substances analyses of amoxicillin and potassium clavulanate mixtures was developed and validated according to international conference on harmonization (ICH) guidelines. Eighteen amoxicillin and six potassium clavulanate impurities were successfully separated from each other by using triple gradient elution using a Thermo Hypersil Zorbax BDS C18 (250 mm×4...
December 27, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28049035/mis-score-prediction-model-for-minimally-invasive-surgery
#19
Yuanyuan Hu, Jingwei Cao, Xianzeng Hou, Guangcun Liu
BACKGROUND: and Purpose Reports suggest that patients with spontaneous intracerebral hemorrhage can benefit from minimally invasive surgery, but the inclusion criterion for operation is controversial. The paper analyzes factors affecting the 30-day prognoses of patients who have received minimally invasive surgery and proposes a simple grading scale that represents clinical operation effectiveness. METHODS: The records of 101 patients with spontaneous intracerebral hemorrhage presenting to Qianfoshan Hospital were reviewed...
December 31, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/28046516/we-ab-207a-03-a-cbct-head-scanner-for-point-of-care-imaging-of-intracranial-hemorrhage
#20
J Xu, A Sisniega, W Zbijewski, H Dang, J Stayman, X Wang, D Foos, N Aygun, V Koliatsos, J Siewerdsen
PURPOSE: This work reports the design, development, and first technical assessment of a cone-beam CT (CBCT) scanner developed specifically for imaging of acute intracranial hemorrhage (ICH) at the point of care, with target applications in diagnosis and monitoring of traumatic brain injury, stroke, and postsurgical hemorrhage. METHODS: System design employed a task-based image quality model to quantify the influence of factors such as additive noise and high-gain (HG) detector readout on ICH detectability...
June 2016: Medical Physics
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