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Journal of Pharmaceutical and Biomedical Analysis

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https://www.readbyqxmd.com/read/28094095/analysis-of-stereoselective-drug-interactions-with-serum-proteins-by-high-performance-affinity-chromatography-a-historical-perspective
#1
Zhao Li, David S Hage
The interactions of drugs with serum proteins are often stereoselective and can affect the distribution, activity, toxicity and rate of excretion of these drugs in the body. A number of approaches based on affinity chromatography, and particularly high-performance affinity chromatography (HPAC), have been used as tools to study these interactions. This review describes the general principles of affinity chromatography and HPAC as related to their use in drug binding studies. The types of serum agents that have been examined with these methods are also discussed, including human serum albumin, α1-acid glycoprotein, and lipoproteins...
January 11, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28092857/universal-efavirenz-determination-in-transport-study-rat-placenta-perfusion-and-placenta-lysate-by-hplc-uv
#2
Lucie Zelena, Josef Reznicek, Martina Ceckova, Hana Sklenarova
Efavirenz is an antiretroviral drug used in the treatment of HIV-positive patients. A simple, fast and sensitive high-performance liquid chromatography (HPLC) method was developed in order to determine efavirenz in three types of samples provided from pharmacokinetic studies. The analysis took 5min and was performed using a C18 analytical column (Discovery HS C18, 150×4.6mm, particle size of 5μm) in isocratic mode with a mobile phase containing acetonitrile and water (65:35, v/v), a flow rate of 1.6mLmin(-1), a sample volume of 10μL and UV detection at 245nm...
January 11, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28092856/separation-of-antibody-drug-conjugate-species-by-rplc-a-generic-method-development-approach
#3
Szabolcs Fekete, Imre Molnár, Davy Guillarme
This study reports the use of modelling software for the successful method development of IgG1 cysteine conjugated antibody drug conjugate (ADC) in RPLC. The goal of such a method is to be able to calculate the average drug to antibody ratio (DAR) of and ADC product. A generic method development strategy was proposed including the optimization of mobile phase temperature, gradient profile and mobile phase ternary composition. For the first time, a 3D retention modelling was presented for large therapeutic protein...
January 11, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28092854/biopharmaceutical-characterization-of-praziquantel-cocrystals-and-cyclodextrin-complexes-prepared-by-grinding
#4
Martina Cugovčan, Jasna Jablan, Jasmina Lovrić, Dominik Cinčić, Nives Galić, Mario Jug
Mechanochemical activation using several different co-grinding additives was applied as a green chemistry approach to improve physiochemical and biopharmaceutical properties of praziquantel (PZQ). Liquid assisted grinding with an equimolar amount of citric acid (CA), malic acid (MA), salicylic acid (SA) and tartaric acid (TA) gained in cocrystal formation, which all showed pH-dependent solubility and dissolution rate. However, the most soluble cocrystal of PZQ with MA was chemically unstable, as seen during the stability testing...
January 10, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28088662/metabolic-profiles-of-exudates-from-chronic-leg-ulcerations
#5
Adam Junka, Wojciech Wojtowicz, Adam Ząbek, Grzegorz Krasowski, Danuta Smutnicka, Barbara Bakalorz, Agnieszka Boruta, Mariusz Dziadas, Piotr Młynarz, Parish Paymon Sedghizadeh, Marzenna Bartoszewicz
Chronic leg ulceration is a disease usually associated with other comorbidities, and significantly reduces patient quality of life. Infected leg ulcers can lead to limb-threatening sequelae or mortality. Leg ulcerations are colonized by a number of microbes that are able to cause life-threating infections in susceptible patients. Wound exudate is a body fluid that collects metabolites from patient eukaryotic cells and from prokaryotic bacterial communities inhabiting the wound. This study aimed at identification of metabolites in exudates collected from chronic leg ulcers, and correlation of this metabolome with patient comorbidities and microbiological status of the wound...
January 10, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28088664/powerful-combination-of-analytical-and-chemometric-methods-for-the-photodegradation-of-5-fluorouracil
#6
Cristian Gómez-Canela, Gabino Bolivar-Subirats, Romà Tauler, Silvia Lacorte
The photodegradation of the antineoplastic drug 5-fluorouracil (5-FU) under the action of UV light was studied using UV-vis spectroscopy and High Performance Liquid Chromatography coupled to Diode Array Detector and High Resolution Mass Spectrometry (HPLC-DAD-HRMS). To analyze, integrate and interpret the degradation kinetics, the Multivariate Curve Resolution-Alternating Least Squares (MCR-ALS) chemometric method has been applied. The high complexity of the photodegradation process of this drug involving up to seven different photoproducts showed the advantages of the proposed approach which provides simultaneously mechanistic and structural information explaining the 5-FU photodegradability...
January 9, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28088663/development-and-validation-of-a-sensitive-and-fast-uplc-ms-ms-method-for-simultaneous-determination-of-seven-bioactive-compounds-in-rat-plasma-after-oral-administration-of-guizhi-gancao-decoction
#7
Bin Ji, Limeng Zhuo, Bin Yang, Yang Wang, Lin Li, Miao Yu, Yunli Zhao, Zhiguo Yu
Rapid, sensitive, selective and accurate UPLC-MS/MS method was developed and fully validated for simultaneous determination of cinnamaldehyde, cinnamic acid, 2-methoxy cinnamic acid, glycyrrhizic acid, glycyrrhetinic acid, liquiritigenin and isoliquiritin in rat plasma after oral administration of Guizhi-gancao decoction. Plasma samples were processed with a simple protein precipitation technique using acetonitrile, followed by chromatographic separation using a Thermo Hypersil GOLD C18 column. A 11.0min linear gradient elution was used at a flow rate of 0...
January 9, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28086165/simultaneous-quantification-of-twenty-one-ginsenosides-and-their-three-aglycones-in-rat-plasma-by-a-developed-uflc-ms-ms-assay-application-to-a-pharmacokinetic-study-of-red-ginseng
#8
Qi-Le Zhou, Di-Na Zhu, Yan-Fang Yang, Wei Xu, Xiu-Wei Yang
To track the pharmacokinetic features of red ginseng (RG), a rapid and sensitive ultra fast liquid chromatographic coupled with electrospray ionization triple quadrupole tandem mass spectrometry (UFLC-MS/MS) method was developed for simultaneous quantification of twenty-one ginsenosides and their three aglycones, including 18 prototype compounds (ginsenosides Rb1, Rb2, Rc, Rd, Re, Rg1, Rg5, Rh4, Rk1, Rk3, 20(S)-Rf, 20(S)-Rg2, 20(R)-Rg2, 20(S)-Rg3, 20(R)-Rg3, 20(S)-Rh1, 20(R)-Rh1, 20(S)-NG-R2), and 6 metabolites (ginsenosides 20(S)-Rh2 and Rh3, 20(S)-protopanaxadiol (PPD), 20(S)-protopanaxatriol (PPT), 20(R)-PPT, ginseng saponin compound K) of RG in rat plasma after oral administration of RG water extract at a single dose of 4g/kg body weight to rats...
January 6, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28081499/screening-active-compounds-from-corydalis-yanhusuo-by-combining-high-expression-vegf-receptor-hek293-cell-membrane-chromatography-with-hplc-esi-it-tof-msn-method
#9
Fen Wei, Qi Hu, Jing Huang, Shengli Han, Sicen Wang
Corydalis Thizoma,or Yuanhu in China, is a common herbal drug used for thousands of years as analgesic in Chinese medicine that has been reported to have potential anti-angiogenic effects. In this study, a VEGFR/cell membrane chromatography (VEGFR/CMC) coupled with HPLC- ESI-IT-TOF-MSn system was developed and successfully applied for identifying active components from YuanHu extract acting on VEGFR. We identified tetrahydropalmatine and corydaline as bioactive components with VEGFR activity, thus confirming their inhibitory activity on VEGFR engineered HEK293 cell growth by MTT assay...
January 4, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28081501/isolation-characterization-using-lc-esi-qtof-nmr-and-in-vitro-cytotoxicity-assay-of-niclosamide-forced-degradation-products
#10
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/28081500/a-highly-sensitive-quantum-dots-dna-nanobiosensor-based-on-fluorescence-resonance-energy-transfer-for-rapid-detection-of-nanomolar-amounts-of-human-papillomavirus-18
#11
Mojtaba Shamsipur, Vahid Nasirian, Kamran Mansouri, Ali Barati, Asad Veisi-Raygani, Soheila Kashanian
A very sensitive and convenient nanobiosensor based on fluorescence resonance energy transfer (FRET) was developed for the detection of a 22-mer oligonucleotides sequence in Human Papillomavirus 18 virus (HPV18) gene. For this purpose, water-soluble CdTe quantum dots (QDs) were synthesized and, subsequently, amino-modified 11-mer oligonucleotide as one of the two necessary probes was attached to QDs surface to form functional QDs-DNA conjugates. Right after addition of the QDs-DNA and a second Cyanine5 (Cy5)-labeled 11-mer oligonucleotide probe to the DNA target solution, the sandwiched hybrids were formed...
January 3, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28068518/impact-of-space-environment-on-stability-of-medicines-challenges-and-prospects
#12
REVIEW
Priti Mehta, Dhara Bhayani
To upkeep health of astronauts in a unique, isolated, and extreme environment of space is the primary goal for a successful space mission, hence, safe and efficacious medications are essential for the wellness of astronauts. Space medication has been challenged with problems related to efficacy. Along with altered physiology, one of the possible reasons could be instability of space medications in the presence of harsh spaceflight environmental conditions. Altered physical and chemical stability can result in reduced potency which can result in reduced efficacy...
January 3, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28081895/cyclodextrins-as-inhibitors-of-the-precipitation-of-riboflavin-5-phosphate-due-to-presence-of-zinc-chloride-a-nmr-investigation
#13
Federica Aiello, Gloria Uccello-Barretta, Niccolò Falugiani, Francesca Nardelli, Federica Balzano
Several cyclodextrins (CDs) were probed in order to counteract the precipitation of riboflavin-5'-phosphate (or flavin mononucleotide, FMN-P) due to the presence of divalent cations, by exploiting Nuclear Magnetic Resonance (NMR) spectroscopy both for quantitative analyses and stereochemical characterizations. Among CDs, β-cyclodextrin (β-CD) showed the best solubilizing power in virtue of the formation of a 1-2 FMN-P/β-CD complex, the stereochemistry of which was ascertained by ROESY (Rotating-frame Overhauser Enhanced SpectroscopY) measurements...
December 31, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28081502/quantitative-determinations-using-portable-raman-spectroscopy
#14
Chelliah V Navin, Chaitanya Tondepu, Roxana Toth, Latevi S Lawson, Jason D Rodriguez
A portable Raman spectrometer was used to develop chemometric models to determine percent (%) drug release and potency for 500mg ciprofloxacin HCl tablets. Parallel dissolution and chromatographic experiments were conducted alongside Raman experiments to assess and compare the performance and capabilities of portable Raman instruments in determining critical drug attributes. All batches tested passed the 30min dissolution specification and the Raman model for drug release was able to essentially reproduce the dissolution profiles obtained by ultraviolet spectroscopy at 276nm for all five batches of the 500mg ciprofloxacin tablets...
December 30, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28064091/dose-response-characteristics-of-clematis-triterpenoid-saponins-and-clematichinenoside-ar-in-rheumatoid-arthritis-rats-by-liquid-chromatography-mass-spectrometry-based-serum-and-urine-metabolomics
#15
Rui Li, Lin-Xiu Guo, Yi Li, Wen-Qi Chang, Jian-Qun Liu, Li-Fang Liu, Gui-Zhong Xin
Clematidis Radix et Rhizoma is a traditional Chinese medicine widely used for treating arthritic disease. Clematis triterpenoid saponins (TS) and clematichinenoside AR (C-AR) have been considered to be responsible for its antiarthritic effects. However, the underling mechanism is still unclear because of their low bioavailability. To address of this issue, metabolomics tools were performed to determine metabolic variations associated with rheumatoid arthritis (RA) and responses to Clematis TS, C-AR and positive drug (Triptolide, TP) treatments...
December 29, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28064090/molecular-insight-into-atypical-instability-behavior-of-fixed-dose-combination-containing-amlodipine-besylate-and-losartan-potassium
#16
Tarun Handa, Shalu Jhajra, Shweta Bhagat, P V Bharatam, Asit K Chakraborti, Saranjit Singh
Combination therapy with the use of fixed-dose combinations (FDCs) is evincing increasing interest of prescribers, manufacturers and even regulators, evidently due to the primary benefit of improved patient compliance. However, owing to potential of drug-drug interaction, FDCs require closer scrutiny with respect to their physical and chemical stability. Accordingly, the purpose of the present study was to explore stability behavior of a popular antihypertensive combination of amlodipine besylate (AML) and losartan potassium (LST)...
December 29, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28063336/evaluation-of-size-exclusion-chromatography-for-the-analysis-of-phosphorothioate-oligonucleotides
#17
Atsuko Shimoyama, Aki Fujisaka, Satoshi Obika
We evaluated size exclusion chromatography (SEC) for the detection of high-order structure of phosphorothioate oligonucleotides (PS-oligo). Because of strong interaction between PS-oligo and column packing material, peaks were broader and elution time was longer than those of the corresponding natural DNA oligonucleotides. However, single- and double-stranded structures of PS-oligo were clearly separated and discriminated, while single-stranded with high-order structures such as G-quadruplex and hairpin structure were not distinguished from each other...
December 29, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28063335/-1-h-nmr-based-metabolomics-study-of-liver-damage-induced-by-ginkgolic-acid-15-1-in-mice
#18
Lei Jiang, Zhi-Hong Si, Ming-Hui Li, He Zhao, Yong-Hong Fu, Yue-Xiao Xing, Wei Hong, Ling-Yu Ruan, Pu-Min Li, Jun-Song Wang
Ginkgolic acid (15:1) is a major toxic component in extracts obtained from Ginkgo biloba (EGb) that has allergic and genotoxic effects. This study is the first to explore the hepatotoxicity of ginkgolic acid (15:1) using a NMR (nuclear magnetic resonance)-based metabolomics approach in combination with biochemistry assays. Mice were orally administered two doses of ginkgolic acid (15:1), and mouse livers and serum were then collected for NMR recordings and biochemical assays. The levels of activity of alanine aminotransferase (ALT) and glutamic aspartate transaminase (AST) observed in the ginkgolic acid (15:1)-treated mice suggested that it had induced severe liver damage...
December 29, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28063333/development-and-validation-of-a-liquid-chromatography-mass-spectrometric-assay-for-simultaneous-determination-of-tacrolimus-and-13-o-desmethyl-tacrolimus-in-rat-kidney-tissue
#19
Tatian Kirresh, Sony Tuteja, D Russo, P D Brophy, D J Murry
A sensitive and robust LC-MS/MS method has been developed and validated to determine the concentrations of tacrolimus and its major metabolite 13-O-desmethyl tacrolimus (13-ODMT) in kidney tissue from rats who received tacrolimus intra-peritoneally at doses of 0.5mg/kg and 2mg/kg. The samples were prepared by a liquid-liquid extraction procedure using ethyl ether as the extraction solvent and ascomycin as the internal standard. Chromatographic separation was achieved using Phenomenex Kinetex column (2.6μm C18 100Å, 100×2...
December 29, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28063332/metabolomics-a-potential-way-to-know-the-role-of-vitamin-d-on-multiple-sclerosis
#20
REVIEW
Diego Luque-Córdoba, María D Luque de Castro
The literature about the influence of vitamin D on multiple sclerosis (MS) is very controversial, possibly as a result of the way through which the research on the subject has been conducted. The studies developed so far have been focused exclusively on gene expression: the effect of a given vitamin D metabolite on target receptors. The influence of the vitamin D status (either natural or after supplementation) on MS has been studied by measurement of the 25 monohydroxylated metabolite (also known as circulating form), despite the 1,25 dihydroxylated metabolite is considered the active form...
December 29, 2016: Journal of Pharmaceutical and Biomedical Analysis
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