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https://www.readbyqxmd.com/read/28081294/xenogeneic-bio-root-prompts-the-constructive-process-characterized-by-macrophage-phenotype-polarization-in-rodents-and-nonhuman-primates
#1
Hui Li, Jingjing Sun, Jie Li, Hefeng Yang, Xiangyou Luo, Jinlong Chen, Li Xie, Fangjun Huo, Tian Zhu, Weihua Guo, Weidong Tian
Tissue or organ regeneration using xenogeneic matrices is a promising approach to address the shortage of donor matrices for allotransplantation. Success of such approach has been demonstrated to correlate with macrophage-mediated fibrotic homeostasis and tissue remodeling. The previous studies have demonstrated that treated dentin matrix (TDM) could be a suitable bioactive substrate for allogeneic tooth root regeneration. This study constructed xenogeneic bioengineered tooth root (bio-root) via a combination of porcine TDM (pTDM) with allogeneic dental follicle cells (DFCs)...
January 12, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28080998/determination-of-oxycodone-and-its-major-metabolites-noroxycodone-and-oxymorphone-by-ultra-high-performance-liquid-chromatography-tandem-mass-spectrometry-in-plasma-and-urine-application-to-real-cases
#2
Flaminia Pantano, Stefano Brauneis, Alexandre Forneris, Roberta Pacifici, Enrico Marinelli, Chrystalla Kyriakou, Simona Pichini, Francesco Paolo Busardò
BACKGROUND: Oxycodone is a narcotic drug widely used to alleviate moderate and severe acute and chronic pain. Variability in analgesic efficacy could be explained by inter-subject variations in plasma concentrations of parent drug and its active metabolite, oxymorphone. To evaluate patient compliance and to set up therapeutic drug monitoring (TDM), an ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) assay was developed and validated for the parent drug and its major metabolites noroxycodone and oxymorphone...
January 12, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28079969/molecular-polygons-probe-the-role-of-intramolecular-strain-in-the-photophysics-of-%C3%AF-conjugated-chromophores
#3
Philipp Wilhelm, Jan Vogelsang, Georgiy Poluektov, Nina Schönfelder, Tristan J Keller, Stefan-Sven Jester, Sigurd Höger, John M Lupton
π-Conjugated segments, chromophores, are the electronically active units of polymer materials used in organic electronics. To elucidate the effect of the bending of these linear moieties on elementary electronic properties, such as luminescence color and radiative rate, we introduce a series of molecular polygons. The π-system in these molecules becomes so distorted in bichromophores (digons) that these absorb and emit light of arbitrary polarization: any part of the chain absorbs and emits radiation with equal probability...
January 12, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28076304/the-use-of-liquid-chromatography-tandem-mass-spectrometry-for-therapeutic-drug-monitoring-of-antibiotics-in-cancer-patients
#4
Nahed El-Najjar, Jonathan Jantsch, André Gessner
Cancer remains a leading cause of mortality and morbidity worldwide. In addition to organ failure, the most frequent reasons for admission of cancer patients to intensive care units (ICU) are: infections and sepsis. As critically ill, the complexity of the health situation of cancer patients renders the standard antimicrobial regimen more complex and even inadequate which results in increased mortality rates. This is due to pathophysiological changes in the volume of distribution, increased clearance, as well as to organ dysfunction...
January 11, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28069654/reduced-chance-of-hearing-loss-associated-with-therapeutic-drug-monitoring-of-aminoglycosides-in-the-treatment-of-multidrug-resistant-tuberculosis
#5
R van Altena, J A Dijkstra, M E van der Meer, J F Borjas Howard, J G W Kosterink, D van Soolingen, T S van der Werf, J W C Alffenaar
Hearing loss and nephrotoxicity are associated with prolonged treatment duration and higher dosage of amikacin and kanamycin. In our Tuberculosis Center, we have employed therapeutic drug monitoring (TDM) targeting pre-set pharmacokinetic/pharmacodynamic (PK/PD) surrogate endpoints in an attempt to maintain efficacy while preventing (oto-)toxicity. To evaluate this strategy, we retrospectively evaluated medical charts of TB patients treated with amikacin or kanamycin in the period 2000 - 2012.Patients with culture-confirmed multi- or extensively drug resistant tuberculosis (MDR/XDR-TB) receiving amikacin or kanamycin as part of their TB treatment for at least 3 days were eligible for inclusion in this retrospective study...
January 9, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28051809/pregnancy-related-changes-of-antiretroviral-pharmacokinetics-an-argument-for-tdm
#6
Francesco R Simonetti, Dario Cattaneo, Nadia Zanchetta, Vania Giacomet, Valeria Micheli, Nadia Ciminera, Cristina Gervasoni
Here we describe a case of an HIV-infected young woman with extensive drug-resistant virus, who was successfully switched from a raltegravir-based regimen to a dolutegravir-based intensified antiretroviral regimen a few days before scheduled caesarean section because of the still detectable viral load. The trough concentrations of all antiretroviral drugs before and after delivery are also described.Our case underlines both the difficult management of young women, HIV-infected at young age with very limited treatment options and the great variability in the pregnancy-related physiologic changes affecting the pharmacokinetics of antiretrovirals...
January 4, 2017: Antiviral Therapy
https://www.readbyqxmd.com/read/28045782/fast-and-adequate-liquid-chromatography-tandem-mass-spectrometric-determination-of-z-endoxifen-serum-levels-for-therapeutic-drug-monitoring
#7
S de Krou, H Rosing, B Nuijen, J H M Schellens, J H Beijnen
BACKGROUND: Z-endoxifen (further referred to as endoxifen, unless stated otherwise) is proposed as the most important metabolite of tamoxifen. Patients receiving adjuvant tamoxifen treatment with endoxifen levels below the threshold of 5.9 ng/mL may have an increased risk of breast cancer recurrence. Several factors, such as genetic polymorphisms, drug interactions, and (non-)adherence, lead to large inter-patient variability in endoxifen exposure, resulting in a substantial number of patients showing sub therapeutic levels...
December 30, 2016: Therapeutic Drug Monitoring
https://www.readbyqxmd.com/read/28043603/individualized-treatment-of-multidrug-resistant-tuberculosis-using-therapeutic-drug-monitoring
#8
Mathieu S Bolhuis, Onno W Akkerman, Marieke G G Sturkenboom, Wiel C M de Lange, Tjip S van der Werf, Jan-Willem C Alffenaar
OBJECTIVE/BACKGROUND: Globally, approximately 50% of patients with multidrug-resistant tuberculosis (MDR-TB) experience treatment failure. MDR-TB treatment is hindered by adverse events, toxicity of the second-line anti-TB drugs, logistics and costs, especially in low-income countries, and problems with medication adherence. Pharmacokinetic variability is also attributed as one of the reasons contributing to treatment failure. In our reference Tuberculosis Center Beatrixoord (University Medical Center Groningen, Groningen, The Netherlands), we strive to individualize treatment of all MDR-TB patients based on drug-susceptibility testing using minimal inhibitory concentrations and pharmacokinetic parameters...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043062/pharmacokinetic-variability-efficacy-and-tolerability-of-eslicarbazepine-acetate-a-national-approach-to-the-evaluation-of-therapeutic-drug-monitoring-data-and-clinical-outcome
#9
Torleiv Svendsen, Eylert Brodtkorb, Arne Reimers, Espen Molden, Erik Sætre, Svein I Johannessen, Cecilie Johannessen Landmark
BACKGROUND: Eslicarbazepine acetate (ESL) is a new antiepileptic drug (AED), still insufficiently studied regarding pharmacokinetic variability, efficacy and tolerability. The purpose of this study was to evaluate therapeutic drug monitoring (TDM) data in Norway and relate pharmacokinetic variability to clinical efficacy and tolerability in a long-term clinical setting in patients with refractory epilepsy. METHODS: This retrospective observational study included TDM-data from the main laboratories and population data from the Norwegian Prescription Database in Norway, in addition to clinical data from medical records of adult patients using ESL for up to three years, whenever possible...
December 5, 2016: Epilepsy Research
https://www.readbyqxmd.com/read/28029150/incorporating-single-step-strategy-into-random-regression-model-to-enhance-genomic-prediction-of-longitudinal-trait
#10
H Kang, L Zhou, R Mrode, Q Zhang, J-F Liu
In prediction of genomic values, single-step method has been demonstrated to outperform multi-step methods. In statistical analyses of longitudinal traits, random regression test-day model (RR-TDM) has clear advantages over other models. Our goal in this study was to evaluate the performance of the model integrating both single-step and RR-TDM prediction methods, called single-step random regression test-day model (SS RR-TDM), in comparison with the pedigree-based RR-TDM and genomic best linear unbiased prediction (GBLUP) model...
December 28, 2016: Heredity
https://www.readbyqxmd.com/read/28028995/recommendations-for-optimizing-tuberculosis-treatment-therapeutic-drug-monitoring-pharmacogenetics-and-nutritional-status-considerations
#11
REVIEW
Rihwa Choi, Byeong Ho Jeong, Won Jung Koh, Soo Youn Lee
Although tuberculosis is largely a curable disease, it remains a major cause of morbidity and mortality worldwide. Although the standard 6-month treatment regimen is highly effective for drug-susceptible tuberculosis, the use of multiple drugs over long periods of time can cause frequent adverse drug reactions. In addition, some patients with drug-susceptible tuberculosis do not respond adequately to treatment and develop treatment failure and drug resistance. Response to tuberculosis treatment could be affected by multiple factors associated with the host-pathogen interaction including genetic factors and the nutritional status of the host...
March 2017: Annals of Laboratory Medicine
https://www.readbyqxmd.com/read/28025029/neutropenia-is-independently-associated-with-sub-therapeutic-serum-concentration-of-vancomycin
#12
Min Hyuk Choi, Yeon Hwa Choe, Sang-Guk Lee, Seok Hoon Jeong, Jeong-Ho Kim
BACKGROUND: We aimed to identify the impact of the presence of neutropenia on serum vancomycin concentration (SVC). METHODS: A retrospective study was conducted from January 2005 to December 2015. The study population was comprised of adult patients who were performed serum concentration of vancomycin. Patients with renal failure or using non-conventional dosages of vancomycin were excluded. RESULTS: A total of 1307 adult patients were included in this study, of whom 163 (12...
December 23, 2016: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28018954/regression-of-metastatic-radiation-chemotherapy-resistant-uterine-serous-carcinoma-overexpressing-her2-neu-with-trastuzumab-emtansine-tdm-1
#13
Alessandro D Santin, Stefania Bellone, Natalia Buza, Peter E Schwartz
BACKGROUND: The management of uterine-serous-carcinoma (USC) no longer amenable to treatment with surgery, radiation and/or chemotherapy remains dismal. Alternative therapeutic options are desperately needed. CASE: We describe the case of a heavily pretreated 74-year-old patient with a recurrent USC overexpressing HER2/neu at 3 + level by IHC treated with the anti-HER2/neu antibody-drug-conjugate (ADC) trastuzumab-emtansine (TDM-1-Kadcyla-Genentech/Roche). She experienced a remarkable clinical response to TDM-1 with a complete resolution of a large metastatic, radiation/chemotherapy resistant tumor deposit in her abdominal wall muscle confirmed by multiple CAT scans and a prolonged systemic control of her disease...
February 2017: Gynecologic Oncology Reports
https://www.readbyqxmd.com/read/28012683/might-real-time-pharmacokinetic-pharmacodynamic-optimisation-of-high-dose-continuous-infusion-meropenem-improve-clinical-cure-in-infections-caused-by-kpc-producing-klebsiella-pneumoniae
#14
Federico Pea, Paola Della Siega, Piergiorgio Cojutti, Assunta Sartor, Massimo Crapis, Claudio Scarparo, Matteo Bassetti
The effect of real-time pharmacokinetic/pharmacodynamic (PK/PD) optimisation of high-dose continuous-infusion meropenem on the clinical outcome of patients receiving combination antimicrobial therapy for treatment of KPC-producing Klebsiella pneumoniae (KPC-Kp) infections was retrospectively assessed. Data for all patients with KPC-Kp-related infections who received antimicrobial combination therapy containing high-dose continuous-infusion meropenem optimised by means of therapeutic drug monitoring (TDM) were retrieved...
December 8, 2016: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/27993531/effect-of-smoking-on-risperidone-pharmacokinetics-a-multifactorial-approach-to-better-predict-the-influence-on-drug-metabolism
#15
Georgios Schoretsanitis, Ekkehard Haen, Benedikt Stegmann, Christoph Hiemke, Gerhard Gründer, Michael Paulzen
PURPOSE: To disentangle an association between tobacco smoking, smoking habits and pharmacokinetic patterns such as plasma concentrations of risperidone (RIS), its active metabolite 9-hydroxyrisperidone (9-OH-RIS) and the active moiety, AM, (RIS+9-OH-RIS) in a naturalistic sample. METHODS: Plasma concentrations, dose adjusted plasma concentrations (C/D) of RIS, 9-OH-RIS and AM in patients out of a therapeutic drug monitoring (TDM) database were compared between smokers (n=401) and non-smokers (n=292)...
December 16, 2016: Schizophrenia Research
https://www.readbyqxmd.com/read/27988326/everolimus-tdm-using-thermo-fisher-qms-immunoassay-on-indiko-beckman-dxc-au680-and-au5800-analyzers
#16
Steven Hy Wong, Kamisha L Johnson-Davis, Krista Garrison, Joe D Rankin, Chro S Muhammad
OBJECTIVES: Everolimus (EVR), a mTOR inhibitor immunosuppressant approved for renal, liver and cardiac transplants. This study established the appropriate TDM performances of the Thermo Scientific QMS EVR Assay by using the Beckman DxC, followed by comparison to the Thermo Scientific Indiko and a previously published LC-MS/MS assay, and Beckman AU680 and AU5800 analyzers. DESIGN AND METHODS: The study initially established acceptable linearity, precision and accuracy of the QMS EVR turbidimetric assay...
December 15, 2016: Clinical Biochemistry
https://www.readbyqxmd.com/read/27977867/simultaneous-uplc-ms-ms-determination-of-antiepileptic-agents-for-dose-adjustment
#17
Faten Farouk, Ehab F ElKady, Hassan M E Azzazy
Therapeutic drug monitoring (TDM) of anti-epileptic drugs (AED) is a routine application. Carbamazepine (CRB) is monitored as the parent drug while oxcarbazepine (OXC) and eslicarbazepine acetate (ESL) are monitored as their active metabolite (eslicarbazepine; MHD). We have developed a UPLC-MS/MS method for determining CRB, OXC, ESL and MHD in plasma or serum with a simplified extraction protocol. The developed method detects sildenafil (SLD) which clinically interferes with AED and is likely to be co-administered in epileptic patients suffering from sexual insufficiency (60%)...
December 15, 2016: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/27965183/dosing-strategies-for-antiepileptic-drugs-from-a-standard-dose-for-all-to-individualised-treatment-by-implementation-of-therapeutic-drug-monitoring
#18
Cecilie Johannessen Landmark, Svein I Johannessen, Torbjörn Tomson
This review focuses on the evolution of approaches to dosing of antiepileptic drugs (AEDs) in clinical practice through history. There has been a shift in the view of treatment of epilepsy, from "one dose fits all patients" in the early days to individualisation of treatment. Over the past 50 years, our knowledge of pharmacological variability of AEDs has markedly increased through implementation of therapeutic drug monitoring (TDM). The use of TDM has demonstrated extensive pharmacokinetic variability for AEDs and a need to individualise the treatment for an optimal outcome...
December 1, 2016: Epileptic Disorders: International Epilepsy Journal with Videotape
https://www.readbyqxmd.com/read/27957480/the-utility-of-infliximab-therapeutic-drug-monitoring-among-patients-with-inflammatory-bowel-disease-and-concerns-for-loss-of-response-a-retrospective-analysis-of-a-real-world-experience
#19
Robert A Mitchell, Constantin Shuster, Neal Shahidi, Cherry Galorport, Mari L DeMarco, Gregory Rosenfeld, Robert A Enns, Brian Bressler
Background. Infliximab (IFX) therapeutic drug monitoring (TDM) allows for objective decision making in patients with inflammatory bowel disease (IBD) and loss of response. Questions remain about whether IFX TDM improves outcomes. Methods. Patients with IBD who had IFX TDM due to concerns for loss of response were considered for inclusion. Serum IFX trough concentration and anti-drug antibody (ADA) concentrations were measured. Patients were grouped by TDM results: group 1, low IFX/high ADA; group 2, low IFX/low ADA; group 3, therapeutic IFX...
2016: Canadian Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/27931193/coagulase-negative-staphylococcal-sepsis-in-neonates-do-we-need-to-adapt-vancomycin-dose-or-target
#20
Helgi Padari, Kersti Oselin, Tõnis Tasa, Tuuli Metsvaht, Krista Lõivukene, Irja Lutsar
BACKGROUND: Despite differences in types of infection and causative organisms, pharmacokinetic-pharmacodynamic (PKPD) targets of vancomycin therapy derived from adult studies are suggested for neonates. We aimed to identify doses needed for the attainment of AUC/MIC > 400 and AUC/MIC > 300 in neonates with sepsis and correlate these targets with recommended doses and treatment outcome. METHODS: Neonates who had Vancomycin therapeutic drug monitoring (TDM) performed between January 1, 2010 and December 31, 2012 were studied...
December 8, 2016: BMC Pediatrics
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