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Pharmaceutics

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https://www.readbyqxmd.com/read/27854292/the-influence-of-solid-microneedles-on-the-transdermal-delivery-of-selected-antiepileptic-drugs
#1
Julia Nguyen, Kevin B Ita, Matthew J Morra, Inna E Popova
The aim of this project was to examine the effect of microneedle rollers on the percutaneous penetration of tiagabine hydrochloride and carbamazepine across porcine skin in vitro. Liquid chromatography-mass spectrometric analysis was carried out using an Agilent 1200 Series HPLC system coupled to an Agilent G1969A TOF-MS system. Transdermal flux values of the drugs were determined from the steady-state portion of the cumulative amount versus time curves. Following twelve hours of microneedle roller application, there was a 6...
November 15, 2016: Pharmaceutics
https://www.readbyqxmd.com/read/27854289/contribution-of-the-hair-follicular-pathway-to-total-skin-permeation-of-topically-applied-and-exposed-chemicals
#2
Fadli Mohd, Hiroaki Todo, Masato Yoshimoto, Eddy Yusuf, Kenji Sugibayashi
Generally, the blood and skin concentration profiles and steady-state skin concentration of topically applied or exposed chemicals can be calculated from the in vitro skin permeation profile. However, these calculation methods are particularly applicable to chemicals for which the main pathway is via the stratum corneum. If the contribution of hair follicles to the total skin permeation of chemicals can be obtained in detail, their blood and skin concentrations can be more precisely predicted. In the present study, the contribution of the hair follicle pathway to the skin permeation of topically applied or exposed chemicals was calculated from the difference between their permeability coefficients through skin with and without hair follicle plugging, using an in vitro skin permeation experiment...
November 15, 2016: Pharmaceutics
https://www.readbyqxmd.com/read/27827989/activated-carbon-based-system-for-the-disposal-of-psychoactive-medications
#3
Yang Song, Mahima Manian, William Fowler, Andrew Korey, Ajay Kumar Banga
The misuse and improper disposal of psychoactive medications is a major safety and environmental concern. Hence, the proper disposal of these medications is critically important. A drug deactivation system which contains activated carbon offers a unique disposal method. In the present study, deactivation efficiency of this system was tested by using three model psychoactive drugs. HPLC validation was performed for each drug to ensure that the analytical method employed was suitable for its intended use. The method was found to be specific, accurate and precise for analyzing the drugs...
November 7, 2016: Pharmaceutics
https://www.readbyqxmd.com/read/27740594/cross-linked-dependency-of-boronic-acid-conjugated-chitosan-nanoparticles-by-diols-for-sustained-insulin-release
#4
Nabil A Siddiqui, Nashiru Billa, Clive J Roberts, Yaa Asantewaa Osei
Boronic acids have been widely investigated for their potential use as glucose sensors in glucose responsive polymeric insulin delivery systems. Interactions between cyclic diols and boronic acids, anchored to polymeric delivery systems, may result in swelling of the delivery system, releasing the drug. In this study, 4-formylphenylboronic acid conjugated chitosan was formulated into insulin containing nanoparticles via polyelectrolyte complexation. The nanoparticles had an average diameter of 140 ± 12.8 nm, polydispersity index of 0...
October 8, 2016: Pharmaceutics
https://www.readbyqxmd.com/read/27649231/rapid-quantification-and-validation-of-lipid-concentrations-within-liposomes
#5
Carla B Roces, Elisabeth Kastner, Peter Stone, Deborah Lowry, Yvonne Perrie
Quantification of the lipid content in liposomal adjuvants for subunit vaccine formulation is of extreme importance, since this concentration impacts both efficacy and stability. In this paper, we outline a high performance liquid chromatography-evaporative light scattering detector (HPLC-ELSD) method that allows for the rapid and simultaneous quantification of lipid concentrations within liposomal systems prepared by three liposomal manufacturing techniques (lipid film hydration, high shear mixing, and microfluidics)...
September 13, 2016: Pharmaceutics
https://www.readbyqxmd.com/read/27598191/an-accelerated-release-study-to-evaluate-long-acting-contraceptive-levonorgestrel-containing-in-situ-forming-depot-systems
#6
Dileep R Janagam, Lizhu Wang, Suryatheja Ananthula, James R Johnson, Tao L Lowe
Biodegradable polymer-based injectable in situ forming depot (ISD) systems that solidify in the body to form a solid or semisolid reservoir are becoming increasingly attractive as an injectable dosage form for sustained (months to years) parenteral drug delivery. Evaluation of long-term drug release from the ISD systems during the formulation development is laborious and costly. An accelerated release method that can effectively correlate the months to years of long-term release in a short time such as days or weeks is economically needed...
September 1, 2016: Pharmaceutics
https://www.readbyqxmd.com/read/27589789/tolterodine-tartrate-proniosomal-gel-transdermal-delivery-for-overactive-bladder
#7
Rajan Rajabalaya, Guok Leen, Jestin Chellian, Srikumar Chakravarthi, Sheba R David
The goal of this study was to formulate and evaluate side effects of transdermal delivery of proniosomal gel compared to oral tolterodine tartrate (TT) for the treatment of overactive bladder (OAB). Proniosomal gels are surfactants, lipids and soy lecithin, prepared by coacervation phase separation. Formulations were analyzed for drug entrapment efficiency (EE), vesicle size, surface morphology, attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy, in vitro skin permeation, and in vivo effects...
August 31, 2016: Pharmaceutics
https://www.readbyqxmd.com/read/27589788/performance-parameters-and-characterizations-of-nanocrystals-a-brief-review
#8
REVIEW
Manasi M Chogale, Vinod N Ghodake, Vandana B Patravale
Poor bioavailability of drugs associated with their poor solubility limits the clinical effectiveness of almost 40% of the newly discovered drug moieties. Low solubility, coupled with a high log p value, high melting point and high dose necessitates exploration of alternative formulation strategies for such drugs. One such novel approach is formulation of the drugs as "Nanocrystals". Nanocrystals are primarily comprised of drug and surfactants/stabilizers and are manufactured by "top-down" or "bottom-up" methods...
August 30, 2016: Pharmaceutics
https://www.readbyqxmd.com/read/27571096/influence-of-the-encapsulation-efficiency-and-size-of-liposome-on-the-oral-bioavailability-of-griseofulvin-loaded-liposomes
#9
Sandy Gim Ming Ong, Long Chiau Ming, Kah Seng Lee, Kah Hay Yuen
The objective of the present study was to investigate the influence of the encapsulation efficiency and size of liposome on the oral bioavailability of griseofulvin-loaded liposomes. Griseofulvin-loaded liposomes with desired characteristics were prepared from pro-liposome using various techniques. To study the effect of encapsulation efficiency, three preparations of griseofulvin, namely, griseofulvin aqueous suspension and two griseofulvin-loaded liposomes with different amounts of griseofulvin encapsulated [i...
August 26, 2016: Pharmaceutics
https://www.readbyqxmd.com/read/27537907/tpgs-stabilized-curcumin-nanoparticles-exhibit-superior-effect-on-carrageenan-induced-inflammation-in-wistar-rat
#10
Heni Rachmawati, Dewi Safitri, Aditya Trias Pradana, I Ketut Adnyana
Curcumin, a hydrophobic polyphenol compound derived from the rhizome of the Curcuma genus, has a wide spectrum of biological and pharmacological applications. Previously, curcumin nanoparticles with different stabilizers had been produced successfully in order to enhance solubility and per oral absorption. In the present study, we tested the anti-inflammatory effect of d-α-Tocopheryl polyethylene glycol 1000 succinate (TPGS)-stabilized curcumin nanoparticles in vivo. Lambda-carrageenan (λ-carrageenan) was used to induce inflammation in rats; it was given by an intraplantar route and intrapelurally through surgery in the pleurisy test...
August 16, 2016: Pharmaceutics
https://www.readbyqxmd.com/read/27447664/drug-delivery-approaches-for-the-treatment-of-cervical-cancer
#11
REVIEW
Farideh Ordikhani, Mustafa Erdem Arslan, Raymundo Marcelo, Ilyas Sahin, Perry Grigsby, Julie K Schwarz, Abdel Kareem Azab
Cervical cancer is a highly prevalent cancer that affects women around the world. With the availability of new technologies, researchers have increased their efforts to develop new drug delivery systems in cervical cancer chemotherapy. In this review, we summarized some of the recent research in systematic and localized drug delivery systems and compared the advantages and disadvantages of these methods.
July 20, 2016: Pharmaceutics
https://www.readbyqxmd.com/read/27438850/2-o-acyl-3-o-1-acyloxyalkyl-prodrugs-of-5-6-isopropylidene-l-ascorbic-acid-and-l-ascorbic-acid-antioxidant-activity-and-ability-to-permeate-silicone-membranes
#12
Nikki A Thiele, Jennifer McGowan, Kenneth B Sloan
2-O-Acyl-3-O-(1-acyloxyalkyl) prodrug derivatives, 15, of 5,6-isopropylidene-l-ascorbic acid, VCA, and l-ascorbic acid, VC, have been characterized by measuring (1) their solubilities in water (SAQ) and in 1-octanol (SOCT); (2) the ability of one member of the homologous series, 15a, to diffuse through a silicone membrane from its application in propylene glycol:water (PG:AQ), 30:70; (3) the ability of another member of the series, 15e, to express cellular antioxidant activity (CAA) in HaCaT cells; and (4) the ability of 15e to support cell viability in HaCaT cells...
July 18, 2016: Pharmaceutics
https://www.readbyqxmd.com/read/27399763/investigation-of-the-dermal-absorption-and-irritation-potential-of-sertaconazole-nitrate-anhydrous-gel
#13
Mahima Manian, Kumpal Madrasi, Ayyappa Chaturvedula, Ajay K Banga
Effective topical therapy of cutaneous fungal diseases requires the delivery of the active agent to the target site in adequate concentrations to produce a pharmacological effect and inhibit the growth of the pathogen. In addition, it is important to determine the concentration of the drug in the skin in order to evaluate the subsequent efficacy and potential toxicity for topical formulations. For this purpose, an anhydrous gel containing sertaconazole nitrate as a model drug was formulated and the amount of the drug in the skin was determined by in vitro tape stripping...
2016: Pharmaceutics
https://www.readbyqxmd.com/read/27355963/novel-solid-self-nanoemulsifying-drug-delivery-system-s-snedds-for-oral-delivery-of-olmesartan-medoxomil-design-formulation-pharmacokinetic-and-bioavailability-evaluation
#14
Ali Nasr, Ahmed Gardouh, Mamdouh Ghorab
The main purpose of this study was to develop a solid self-nanoemulsifying drug delivery system (S-SNEDDS) of Olmesartan (OLM) for enhancement of its solubility and dissolution rate. In this study, liquid SNEDDS containing Olmesartan was formulated and further developed into a solid form by the spray drying technique using Aerosil 200 as a solid carrier. Based on the preliminary screening of different unloaded SNEDDS formulae, eight formulae of OLM loaded SNEEDS were prepared using Capryol 90, Cremophor RH40 and Transcutol HP as oil, surfactant and cosurfactant, respectively...
2016: Pharmaceutics
https://www.readbyqxmd.com/read/27231934/liposomes-in-drug-delivery-how-it-all-happened
#15
EDITORIAL
Gregory Gregoriadis
Effective delivery of drugs via liposomes in the treatment or prevention of disease is the aim of numerous researchers worldwide.[...].
2016: Pharmaceutics
https://www.readbyqxmd.com/read/27231933/current-trends-in-development-of-liposomes-for-targeting-bacterial-biofilms
#16
REVIEW
Zora Rukavina, Željka Vanić
Biofilm targeting represents a great challenge for effective antimicrobial therapy. Increased biofilm resistance, even with the elevated concentrations of very potent antimicrobial agents, often leads to failed therapeutic outcome. Application of biocompatible nanomicrobials, particularly liposomally-associated nanomicrobials, presents a promising approach for improved drug delivery to bacterial cells and biofilms. Versatile manipulations of liposomal physicochemical properties, such as the bilayer composition, membrane fluidity, size, surface charge and coating, enable development of liposomes with desired pharmacokinetic and pharmacodynamic profiles...
2016: Pharmaceutics
https://www.readbyqxmd.com/read/27213435/stabilizing-agents-for-drug-nanocrystals-effect-on-bioavailability
#17
REVIEW
Annika Tuomela, Jouni Hirvonen, Leena Peltonen
Drug nanocrystals are a versatile option for drug delivery purposes, and while the number of poorly soluble drug materials is all the time increasing, more research in this area is performed. Drug nanocrystals have a simple structure-a solid drug core is surrounded by a layer of stabilizing agent. However, despite the considerably simple structure, the selection of an appropriate stabilizer for a certain drug can be challenging. Mostly, the stabilizer selection is based purely on the requirement of physical stability, e...
2016: Pharmaceutics
https://www.readbyqxmd.com/read/27213434/nanomilling-of-drugs-for-bioavailability-enhancement-a-holistic-formulation-process-perspective
#18
REVIEW
Meng Li, Mohammad Azad, Rajesh Davé, Ecevit Bilgili
Preparation of drug nanoparticles via wet media milling (nanomilling) is a very versatile drug delivery platform and is suitable for oral, injectable, inhalable, and buccal applications. Wet media milling followed by various drying processes has become a well-established and proven formulation approach especially for bioavailability enhancement of poorly water-soluble drugs. It has several advantages such as organic solvent-free processing, tunable and relatively high drug loading, and applicability to a multitude of poorly water-soluble drugs...
2016: Pharmaceutics
https://www.readbyqxmd.com/read/27110816/challenges-solutions-and-quality-metrics-of-personal-genome-assembly-in-advancing-precision-medicine
#19
REVIEW
Wenming Xiao, Leihong Wu, Gokhan Yavas, Vahan Simonyan, Baitang Ning, Huixiao Hong
Even though each of us shares more than 99% of the DNA sequences in our genome, there are millions of sequence codes or structure in small regions that differ between individuals, giving us different characteristics of appearance or responsiveness to medical treatments. Currently, genetic variants in diseased tissues, such as tumors, are uncovered by exploring the differences between the reference genome and the sequences detected in the diseased tissue. However, the public reference genome was derived with the DNA from multiple individuals...
2016: Pharmaceutics
https://www.readbyqxmd.com/read/27104555/nanoparticle-laden-contact-lens-for-controlled-ocular-delivery-of-prednisolone-formulation-optimization-using-statistical-experimental-design
#20
Amr ElShaer, Shelan Mustafa, Mohamad Kasar, Sapana Thapa, Baljit Ghatora, Raid G Alany
Human eye is one of the most accessible organs in the body, nonetheless, its physiology and associated precorneal factors such as nasolacrimal drainage, blinking, tear film, tear turnover, and induced lacrimation has significantly decreased the residence time of any foreign substances including pharmaceutical dosage forms. Soft contact lenses are promising delivery devices that can sustain the drug release and prolong residence time by acting as a geometric barrier to drug diffusion to tear fluid. This study investigates experimental parameters such as composition of polymer mixtures, stabilizer and the amount of active pharmaceutical ingredient on the preparation of a polymeric drug delivery system for the topical ocular administration of Prednisolone...
2016: Pharmaceutics
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