keyword
MENU ▼
Read by QxMD icon Read
search

Pharmacokinetics pharmacodynamics

keyword
https://www.readbyqxmd.com/read/28937021/optimized-high-dose-amoxicillin-proton-pump-inhibitor-dual-therapies-fail-to-achieve-high-cure-rates-in-china
#1
Jia-Li Hu, Jun Yang, Yin-Bin Zhou, Ping Li, Ran Han, Dian-Chun Fang
Background\Aim: Quadruple daily administration of proton-pump inhibitor (PPI) therapy achieves potent acid inhibition, and combined with amoxicillin, with its pharmacodynamic and pharmacokinetic characteristics, may be efficient for Helicobacter pylori eradication. We compared the efficacy of two optimized high-dose dual therapies with a bismuth-containing quadruple regimen for treating H. pylori infection. Rabeprazole dosages for H. pylori eradication were also evaluated. PATIENTS AND METHODS: Treatment-naive and H...
September 2017: Saudi Journal of Gastroenterology: Official Journal of the Saudi Gastroenterology Association
https://www.readbyqxmd.com/read/28936957/-pk-pd-of-vancomycin-in-patients-with-severe-acute-pancreatitis-combined-with-augmented-renal-clearance
#2
Juan He, Enqiang Mao, Feng Jing, Huiting Jiang, Wenyun Xu, Wanhua Yang, Erzhen Chen
OBJECTIVE: To evaluate the serum trough concentration and the pharmacokinetics/pharmacodynamics (PK/PD) of vancomycin in patients with severe acute pancreatitis (SAP), and analyze the effect of vancomycin continuous infusion for optimizing the characteristics of its PK/PD. METHODS: The inhospital patients with SAP received vancomycin treatment and admitted to emergency intensive care unit (EICU) of Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine from January 2011 to December 2016 were enrolled...
September 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28936389/disease-progression-modeling-key-concepts-and-recent-developments
#3
Sarah F Cook, Robert R Bies
Disease modeling involves the use of mathematical functions to describe quantitatively the time course of disease progression. In order to characterize the natural progression of disease, these models generally incorporate longitudinal data for some biomarker(s) of disease severity or can incorporate more direct measures of disease severity. Disease models are also often linked to pharmacokinetic-pharmacodynamic models so that the influence of drug treatment on disease progression can be quantified and evaluated...
October 2016: Current Pharmacology Reports
https://www.readbyqxmd.com/read/28936175/pharmacokinetics-and-pharmacodynamics-of-lisdexamfetamine-compared-with-d-amphetamine-in-healthy-subjects
#4
Patrick C Dolder, Petra Strajhar, Patrick Vizeli, Felix Hammann, Alex Odermatt, Matthias E Liechti
Rationale: Lisdexamfetamine is a prodrug of D-amphetamine used for the treatment of attention-deficit/hyperactivity disorder (ADHD). Lisdexamfetamine is thought to have a prolonged pharmacokinetic profile compared with oral D-amphetamine, possibly associated with lower drug liking and a lower risk of oral misuse. However, differences in the pharmacokinetics and pharmacodynamics of lisdexamfetamine and D-amphetamine have not been directly compared. Methods: Equimolar doses of D-amphetamine (40 mg) and lisdexamfetamine (100 mg), and placebo were administered in 24 healthy subjects in a randomized, double-blind, placebo-controlled, cross-over study...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28935919/split-dosing-of-artemisinins-does-not-improve-antimalarial-therapeutic-efficacy
#5
N J White, J Watson, E A Ashley
It has been suggested recently, based on pharmacokinetic-pharmacodynamic modelling exercises, that twice daily dosing of artemisinins increases malaria parasite killing and so could "dramatically enhance and restore drug effectiveness" in artemisinin resistant P. falciparum malaria infections. It was recommended that split dosing should be incorporated into all artemisinin combination regimen designs. To explain why parasite clearance rates were not faster with split dose regimens it was concluded that splenic malaria parasite clearance capacity was readily exceeded, resulting in the accumulation of dead parasites in the circulation, that parasite clearance was therefore an unreliable measure of drug efficacy, and instead that human immunity is the primary determinant of clearance rates...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28934207/evaluation-of-the-pharmacokinetic-pharmacodynamic-relationship-of-praziquantel-in-the-schistosoma-mansoni-mouse-model
#6
Nada Abla, Jennifer Keiser, Mireille Vargas, Natalie Reimers, Helmut Haas, Thomas Spangenberg
After more than 40 years of use, Praziquantel (PZQ) still remains the drug of choice for the treatment of intestinal and urogenital schistosomiasis. Its anti-parasitic activity resides primarily in the (R)-enantiomer. Hitherto neither the molecular target nor the pharmacokinetic-pharmacodynamic relationship have been fully elucidated. Here we investigated the efficacy and pharmacokinetics of PZQ in the Schistosoma mansoni mouse model to determine the key factors that drive its efficacy. Dose-response studies with racemic PZQ with or without addition of an irreversible pan-cytochrome P450 (CYP) inhibitor, 1-aminobenzotriazole (ABT), were performed...
September 21, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28933618/novel-cns-drug-discovery-and-development-approach-model-based-integration-to-predict-neuro-pharmacokinetics-and-pharmacodynamics
#7
Elizabeth C M de Lange, Willem van den Brink, Yumi Yamamoto, Wilhelmus E A de Witte, Yin Cheong Wong
CNS drug development has been hampered by inadequate consideration of CNS pharmacokinetic (PK), pharmacodynamics (PD) and disease complexity (reductionist approach). Improvement is required via integrative model-based approaches. Areas covered: The authors summarize factors that have played a role in the high attrition rate of CNS compounds. Recent advances in CNS research and drug discovery are presented, especially with regard to assessment of relevant neuro-PK parameters. Suggestions for further improvements are also discussed...
September 21, 2017: Expert Opinion on Drug Discovery
https://www.readbyqxmd.com/read/28933303/cardioprotective-potential-of-iron-chelators-and-prochelators
#8
Hana Jansova, Tomas Simunek
Heart is a particularly sensitive organ to iron overload and cardiomyopathy due to the excessive cardiac iron deposition causes most deaths in disorders such as beta-thalassemia major. Free or loosely bound iron ions readily cycle between ferrous and ferric states and catalyze Haber-Weiss reaction that yields highly reactive and toxic hydroxyl radicals. Treatment with iron chelators (desferrioxamine, deferiprone, and deferasirox) substantially improved cardiovascular morbidity and mortality in iron overloaded patients...
September 20, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28933124/-analysis-on-pharmacokinetics-pharmacodynamics-correlation-of-effective-ingredients-of-qing-e-wan
#9
Ling Liu, Ze-Bin Weng, Heng Wang, Xing-Yu Zhu, Zhi-Peng Chen, Li Wu, Wei-Dong Li
To study the pharmacokinetics of three active ingredients in Qing'e wan, namely geniposidic acid, psoralen and isopsoralen, in rats, in order to investigate their correlation in the anti-osteoporotic effect. The rats were taken blood from their eye sockets at different time points after being orally administered with raw and salt-processed Qing'e wan. Geniposidic acid, psoralen and isopsoralen in rats plasma were determined by means of UHPLC-MS/MS to draw the concentration-time curve. The proliferation rate of osteoblasts was taken as the pharmacodynamic index, and determined by MTT method to draw effect-time curve...
December 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28932995/pharmacokinetics-and-preliminary-pharmacodynamics-of-single-and-multiple-dose-lyophilized-recombinant-glucagon-like-peptide-1-receptor-agonist-re-4-in-chinese-patients-with-type-2-diabetes-mellitus
#10
Yitong Wang, Bingfeng Xu, Lixia Zhu, Kun Lou, Yingli Chen, Xia Zhao, Qian Wang, Ling Xu, Xiaohui Guo, Linong Ji, Yimin Cui, Yi Fang
BACKGROUND AND OBJECTIVES: Recombinant glucagon-like peptide-1 receptor agonist (rE-4) is a glucagon-like peptide-1 receptor agonist, which has the same amino acid sequence to exenatide, except for the C-terminal deamidated. This study assessed the pharmacokinetics and preliminary pharmacodynamics of rE-4, following single and multiple subcutaneous injections in Chinese patients with type 2 diabetes mellitus (T2DM). DESIGN AND METHODS: In the randomized, open-label study, Chinese patients with T2DM (n = 36) were randomly assigned to three groups of rE-4 (n = 12), rE-4 with metformin (n = 12) and exenatide (n = 12, as the control group) for 12 weeks...
September 20, 2017: Clinical Drug Investigation
https://www.readbyqxmd.com/read/28930444/the-potential-of-phenylbutyrate-as-adjuvant-chemotherapy-an-overview-of-cellular-and-molecular-anticancer-mechanisms
#11
Maha Al-Keilani, Nour A Al-Sawalha
Despite the advancement in cancer therapy, a high number of patients fail treatment because of drug resistance. Several preclinical in vitro data suggest that phenylbutyrate has antiproliferative, antiangiogenic, antimetastatic, immunomodulatory, and differentiating properties. Moreover, phenylbutyrate administration in vivo provided an oncoprotective effect. However, the results of clinical trials indicate that the antineoplastic potential of phenylbutyrate is hindered by its pharmacokinetic and pharmacodynamic properties...
September 20, 2017: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/28930109/abcg2-regulatory-single-nucleotide-polymorphisms-alter-in-vivo-enhancer-activity-and-expression
#12
Rachel J Eclov, Mee J Kim, Aparna Chhibber, Robin P Smith, Nadav Ahituv, Deanna L Kroetz
OBJECTIVES: The expression and activity of the breast cancer resistance protein (ABCG2) contributes toward the pharmacokinetics of endogenous and xenobiotic substrates. The effect of genetic variation on the activity of cis-regulatory elements and nuclear response elements in the ABCG2 locus and their contribution toward ABCG2 expression have not been investigated systematically. In this study, the effect of genetic variation on the in-vitro and in-vivo enhancer activity of six previously identified liver enhancers in the ABCG2 locus was examined...
September 18, 2017: Pharmacogenetics and Genomics
https://www.readbyqxmd.com/read/28929804/fluorinated-nucleosides-as-an-important-class-of-anticancer-and-antiviral-agents
#13
Alessandra Cavaliere, Katrin C Probst, Andrew D Westwell, Magdalena Slusarczyk
Fluorine-containing nucleoside analogs (NAs) represent a significant class of the US FDA-approved chemotherapeutics widely used in the clinic. The incorporation of fluorine into drug-like agents modulates lipophilic, electronic and steric parameters, thus influencing pharmacodynamic and pharmacokinetic properties of drugs. Fluorine can block oxidative metabolism of drugs and the formation of undesired metabolites by changing H-bonding interactions. In this review, we focus our attention on chemical fluorination reagents and methods used in the NAs field, including positron emission tomography radiochemistry...
September 20, 2017: Future Medicinal Chemistry
https://www.readbyqxmd.com/read/28927064/bortezomib-carfilzomib-and-ixazomib-do-not-mediate-relevant-transporter-based-drug-drug-interactions
#14
Jannick Clemens, Lukas Welti, Julia Schäfer, Anja Seckinger, Jürgen Burhenne, Dirk Theile, Johanna Weiss
In order to optimize the clinical application of an increasing number of proteasome inhibitors, investigations into the differences between their respective pharmacodynamic and pharmacokinetic profiles, including their ability to act as a perpetrator in drug-drug interactions, are warranted. Therefore, in the present in vitro study, it was investigated whether bortezomib, carfilzomib and ixazomib are able to alter the expression, and/or the activity, of specific drug transporters generally relevant for pharmacokinetic drug-drug interactions...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28926841/beneficial-combination-of-lacosamide-with-retigabine-in-experimental-animals-an-isobolographic-analysis
#15
Jarogniew J Luszczki, Mirosław Zagaja, Barbara Miziak, Maria W Kondrat-Wrobel, Katarzyna Zaluska, Paula Wroblewska-Luczka, Piotr Adamczuk, Stanislaw J Czuczwar, Magdalena Florek-Luszczki
BACKGROUND/AIM: To isobolographically determine the types of interactions that occur between retigabine and lacosamide (LCM; two third-generation antiepileptic drugs) with respect to their anticonvulsant activity and acute adverse effects (sedation) in the maximal electroshock-induced seizures (MES) and chimney test (motor performance) in adult male Swiss mice. METHODS: Type I isobolographic analysis for nonparallel dose-response effects for the combination of retigabine with LCM (at the fixed-ratio of 1:1) in both the MES and chimney test in mice was performed...
September 20, 2017: Pharmacology
https://www.readbyqxmd.com/read/28925046/in-vivo-pharmacodynamic-and-pharmacokinetic-interactions-of-hibiscus-sabdariffa-calyces-extracts-with-simvastatin
#16
S J Showande, O M Adegbolagun, S I Igbinoba, T O Fakeye
WHAT IS KNOWN AND OBJECTIVES: Increasing number of patients use herbs with their medications. Such practice may result in beneficial or harmful herb-drug interactions. A recent survey reported that some participants co-administered Hibiscus sabdariffa, a widely used beverage, or tea, with their antihyperlipidaemic medications. This study therefore evaluated the effect of concomitant administration of Hibiscus sabdariffa calyces' extracts with simvastatin on hyperlipidaemia and pharmacokinetics of the drug in vivo...
September 18, 2017: Journal of Clinical Pharmacy and Therapeutics
https://www.readbyqxmd.com/read/28923321/nose-to-brain-delivery-of-rivastigmine-by-in-situ-gelling-cationic-nanostructured-lipid-carriers-enhanced-brain-distribution-and-pharmacodynamics
#17
Preeti Wavikar, Rohan Pai, Pradeep Vavia
Present investigation explores the potential of Nanostructured Lipid Carriers (NLCs) for nose to brain delivery of Rivastigmine (RV), which is further enhanced by incorporating into an in-situ gelling system, increasing retention in nasal cavity. NLC's having particle size of 123.2±2.3 nm, entrapment efficiency of 68.3±3.4% and zeta potential of 32±1.2 mV was fabricated by a scalable method. Pharmacokinetics showed sustained release of intranasal (IN) and intravenous (IV) NLC's compared to RV solution by same route, with significantly higher AUC and Thalf...
September 15, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28923301/clinical-pharmacokinetics-and-pharmacodynamic-target-attainment-of-pazufloxacin-in-prostate-tissue-dosing-considerations-for-prostatitis
#18
Kogenta Nakamura, Kazuro Ikawa, Genya Nishikawa, Ikuo Kobayashi, Masahiro Narushima, Hiroyuki Muramatsu, Shingo Morinaga, Keishi Kajikawa, Yoshiharu Kato, Masahito Watanabe, Kenji Zennami, Kent Kanao, Norifumi Morikawa, Makoto Sumitomo
The present study examined the clinical pharmacokinetics of pazufloxacin in prostate tissue and estimated the probability of target attainment for tissue-specific pharmacodynamic goals related to treating prostatitis using various intravenous dosing regimens. Patients with prostatic hypertrophy received prophylactic infusions of pazufloxacin (500 mg, n = 23; 1000 mg, n = 25) for 0.5 h prior to transurethral prostate resection. Drug concentrations in plasma (0.5-5 h) and prostate tissue (0.5-1.5 h) were measured by high-performance liquid chromatography and used for subsequent noncompartmental and three-compartmental analysis...
September 8, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28922979/a-review-of-drug-drug-interactions-in-older-hiv-infected-patients
#19
Aarthi Chary, Nancy N Nguyen, Kimberly Maiton, Mark Holodniy
The number of older HIV-infected people is growing due to increasing life expectancies resulting from the use of antiretroviral therapy (ART). Both HIV and aging increase the risk of other comorbidities, such as cardiovascular disease, osteoporosis, and some malignancies, leading to greater challenges in managing HIV with other conditions. This results in complex medication regimens with the potential for significant drug-drug interactions and increased morbidity and mortality. Area covered: We review the metabolic pathways of ART and other medications used to treat medical co-morbidities, highlight potential areas of concern for drug-drug interactions, and where feasible, suggest alternative approaches for treating these conditions as suggested from national guidelines or articles published in the English language...
September 19, 2017: Expert Review of Clinical Pharmacology
https://www.readbyqxmd.com/read/28922811/a-programme-to-create-short-course-chemotherapy-for-pulmonary-mycobacterium-avium-disease-based-on-pharmacokinetics-pharmacodynamics-and-mathematical-forecasting
#20
Devyani Deshpande, Shashikant Srivastava, Tawanda Gumbo
Objectives: Pulmonary Mycobacterium avium complex (MAC) prevalence is on the rise worldwide. The average therapy duration is 1.5 years, which is associated with poor cure rates. Our objective was to develop a programme to design a combination therapy regimen for pulmonary MAC to be administered for 6 months or less with efficacy in > 90% of patients. Methods: We performed a literature search for the following MeSH headings 'Mycobacterium avium' AND 'pharmacokinetics/pharmacodynamics' in PubMed up to 2016...
September 1, 2017: Journal of Antimicrobial Chemotherapy
keyword
keyword
72812
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"