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https://www.readbyqxmd.com/read/27910752/submicron-emulsions-and-their-applications-in-oral-delivery
#1
Veenu Mundada, Mitali Patel, Krutika Sawant
A "submicron emulsion" is an isotropic mixture of drug, lipids, and surfactants, usually with hydrophilic cosolvents and with droplet diameters ranging from 10 to 500 nm. Submicron emulsions are of increasing interest in medicine due to their kinetic stability, high solubilizing capacity, and tiny globule size. Because of these properties, they have been applied in various fields, such as personal care, cosmetics, health care, pharmaceuticals, and agrochemicals. Submicron emulsions are by far the most advanced nanoparticulate systems for the systemic delivery of biologically active agents for controlled drug delivery and targeting...
2016: Critical Reviews in Therapeutic Drug Carrier Systems
https://www.readbyqxmd.com/read/27907978/comparison-of-the-single-dose-pharmacokinetics-pharmacodynamics-and-safety-of-two-novel-oral-formulations-of-dimethandrolone-undecanoate-dmau-a-potential-oral-male-contraceptive
#2
R Ayoub, S T Page, R S Swerdloff, P Y Liu, J K Amory, A Leung, L Hull, D Blithe, A Christy, J H Chao, W J Bremner, C Wang
Dimethandrolone (DMA, 7α,11β-dimethyl-19-nortestosterone) has both androgenic and progestational activities, ideal properties for a male hormonal contraceptive. In vivo, dimethandrolone undecanoate (DMAU) is hydrolyzed to DMA. We showed previously that single oral doses of DMAU powder in capsule taken with food are well tolerated and effective at suppressing both LH and testosterone (T), but absorption was low. We compared the pharmacokinetics and pharmacodynamics of two new formulations of DMAU, in castor oil and in self-emulsifying drug delivery systems (SEDDS), with the previously tested powder formulation...
December 1, 2016: Andrology
https://www.readbyqxmd.com/read/27890596/monoacyl-phosphatidylcholine-inhibits-the-formation-of-lipid-multilamellar-structures-during-in-vitro-lipolysis-of-self-emulsifying-drug-delivery-systems
#3
Thuy Tran, Scheyla D V S Siqueira, Heinz Amenitsch, Thomas Rades, Anette Müllertz
The colloidal structures formed during lipolysis of self-emulsifying drug delivery systems (SEDDS) might affect the solubilisation and possibly the absorption of drugs. The aim of the current study is to elucidate the structures formed during the in vitro lipolysis of four SEDDS containing medium-chain glycerides and caprylocaproyl polyoxyl-8 glycerides (Labrasol), with or without monoacyl phosphatidylcholine (MAPC). In situ synchrotron small-angle X-ray scattering (SAXS) was combined with ex situ cryogenic transmission electron microscopy (cryo-TEM) and dynamic light scattering (DLS) to elucidate the generated structures...
November 24, 2016: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/27876599/self-emulsifying-drug-delivery-systems-sedds-proof-of-concept-how-to-make-them-mucoadhesive
#4
Gintare Leonaviciute, Nada Trivic Adamovic, Hung Thanh Lam, Julia Rohrer, Alexandra Partenhauser, Andreas Bernkop-Schnürch
AIM: The objective of this study was to provide a proof-of-concept that self-emulsifying drug delivery systems can be made mucoadhesive by the incorporation of hydrophobic mucoadhesive polymers. METHODS: In order to obtain such a hydrophobic mucoadhesive polymer, Eudragit® S100 was thiolated by covalent attachment of cysteamine. After determination of the thiol group content, in vitro mucoadhesion studies (rotating cylinder and rheological measurements) were performed...
November 19, 2016: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/27774912/development-of-self-emulsifying-formulations-of-poorly-soluble-naproxen-for-enhanced-drug-delivery
#5
Subhash Chandra Bose Penjuri, Saritha Damineni, Nagaraju Ravouru, Srikanth Reddy Poreddy Reddy Poreddy
BACKGROUND: The objective of this investigation was to develop a self emulsifying drug delivery system (SEDDS) of naproxen, a poorly water soluble drug, which could improve its solubility and oral bioavailability. Methoda: The recent patents on SEDDS of abiraterone acetate (WO2014/009434 A1) and tamoxifen (WO2013/0080083) helped in selecting the naproxen and excipients. Phase diagrams were constructed and the formulations were taken from the micro emulsion region. Formulations were subjected to thermodynamic stability, dispersibility and precipitation tests for optimization...
October 19, 2016: Recent Patents on Drug Delivery & Formulation
https://www.readbyqxmd.com/read/27693677/development-in-vitro-and-in-vivo-evaluation-of-a-self-emulsifying-drug-delivery-system-sedds-for-oral-enoxaparin-administration
#6
Ožbej Zupančič, Julia Anita Grieβinger, Julia Rohrer, Irene Pereira de Sousa, Lukas Danninger, Alexandra Partenhauser, Nadine Elli Sündermann, Flavia Laffleur, Andreas Bernkop-Schnürch
AIM: The aim of this study was to develop SEDDS for oral enoxaparin administration and evaluate it in vitro and in vivo. METHODS: The emulsifying properties of SEDDS composed of long chain lipids (LC-SEDDS), medium chain lipids (MC-SEDDS), short chain lipids (SC-SEDDS) and no lipids (NL-SEDDS) were evaluated. Thereafter, enoxaparin was incorporated via hydrophobic ion pairing in the chosen SEDDS, which were evaluated regarding their mucus permeating properties, stability towards pancreatic lipase, drug release profile and cytotoxicity...
December 2016: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/27685505/controversies-with-self-emulsifying-drug-delivery-system-from-pharmacokinetic-point-of-view
#7
Bappaditya Chatterjee, Samah Hamed Almurisi, Ather Ahmed Mahdi Dukhan, Uttam Kumar Mandal, Pinaki Sengupta
Self-emulsifying drug delivery system (SEDDS) is an isotropic mixture of lipid, surfactant and co-surfactant, which forms a fine emulsion when comes in contact of an aqueous medium with mild agitation. SEDDS is considered as a potential platform for oral delivery of hydrophobic drug in order to overcome their poor and irregular bioavailability challenges. In spite of fewer advantages like improved solubility of drug, bypassing lymphatic transport etc., SEDDS faces different controversial issues such as the use of appropriate terminology (self-microemulsifying drug delivery system; SMEDDS or self-nanoemulsifying drug delivery system; SNEDDS), presence of high amount of surfactant, correlation of in vitro model to in vivo studies, lack of human volunteer study and effect of conversion of SEDDS to final administrable dosage form on pharmacokinetic behavior of the drug...
November 2016: Drug Delivery
https://www.readbyqxmd.com/read/27615708/in-vivo-evaluation-of-lipid-based-formulations-for-oral-delivery-of-apomorphine-and-its-diester-prodrugs
#8
Nrupa Borkar, René Holm, Mingshi Yang, Anette Müllertz, Huiling Mu
In the present study, the differences in oral absorption of apomorphine and its diester prodrugs and the effect of lipid-based formulations on the absorption of apomorphine or its prodrugs were investigated. Apomorphine, dilauroyl apomorphine (DLA) and dipalmitoyl apomorphine (DPA) were orally administered (0.24mmol/kg) to rats as: DLA-o/w emulsion, DPA-o/w emulsion, apomorphine-o/w emulsion, apomorphine aqueous suspension, DLA-Maisine, DLA-soybean oil, DLA-self-emulsifying drug delivery systems (SEDDS), and DLA-w/o emulsion...
September 9, 2016: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27608983/time-dependent-density-functional-theory-td-dft-coupled-with-reference-interaction-site-model-self-consistent-field-explicitly-including-spatial-electron-density-distribution-rism-scf-sedd
#9
D Yokogawa
Theoretical approach to design bright bio-imaging molecules is one of the most progressing ones. However, because of the system size and computational accuracy, the number of theoretical studies is limited to our knowledge. To overcome the difficulties, we developed a new method based on reference interaction site model self-consistent field explicitly including spatial electron density distribution and time-dependent density functional theory. We applied it to the calculation of indole and 5-cyanoindole at ground and excited states in gas and solution phases...
September 7, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27329673/development-and-in-vitro-evaluation-of-zeta-potential-changing-self-emulsifying-drug-delivery-systems-for-enhanced-mucus-permeation
#10
Wongsakorn Suchaoin, Irene Pereira de Sousa, Kesinee Netsomboon, Hung Thanh Lam, Flavia Laffleur, Andreas Bernkop-Schnürch
The aim of this study was the development of zeta potential changing self-emulsifying drug delivery systems (SEDDS). Various cationic surfactants were incorporated into a formulation consisting of 30% Cremophor EL, 30% Capmul MCM, 30% Captex 355 and 10% propylene glycol (w/w). A substrate of intestinal alkaline phosphatase (IAP), 1,2-dipalmitoyl-sn-glycero-3-phosphatidic acid sodium (PA), was thereafter incorporated into SEDDS. Size, zeta potential and polydispersity index were determined. Phosphate release studies were performed using three different models, namely, isolated IAP, Caco-2 cell monolayer and rat intestinal mucosa and the amount of released phosphate was quantified by malachite green assay...
August 20, 2016: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27279337/current-trends-in-self-emulsifying-drug-delivery-systems-seddss-to-enhance-the-bioavailability-of-poorly-water-soluble-drugs
#11
Rohit Karwal, Tarun Garg, Goutam Rath, Tanmay S Markandeywar
The main object of the self-emulsifying drug-delivery system (SEDDS) is oral bioavailability (BA) enhancement of a poorly water-soluble drug. Low aqueous solubility and low oral BA are major concerns for formulation scientists. As many drugs are lipophilic in nature, their lower solubility and dissolution are major drawbacks for their successful formulation into oral dosage forms. More than 60% of drugs have a lipophilic nature and exhibit poor aqueous solubility. Various strategies are reported in the literature to improve the solubility and enhance BA of lipophilic drugs, including the formation of a cyclodextrin complex, solid dispersions, and micronization...
2016: Critical Reviews in Therapeutic Drug Carrier Systems
https://www.readbyqxmd.com/read/27241877/formulation-optimization-of-docetaxel-loaded-self-emulsifying-drug-delivery-system-to-enhance-bioavailability-and-anti-tumor-activity
#12
Guru R Valicherla, Kandarp M Dave, Anees A Syed, Mohammed Riyazuddin, Anand P Gupta, Akhilesh Singh, Wahajuddin, Kalyan Mitra, Dipak Datta, Jiaur R Gayen
Poor bioavailability of Docetaxel (DCT) arising due to its low aqueous solubility and permeability limits its clinical utility. The aim of the present study was to develop DCT loaded self-emulsified drug delivery systems (D-SEDDS) and evaluate its potential ability to improve the oral bioavailability and therapeutic efficacy of DCT. D-SEDDS were characterized for their in vitro antitumor activity, in situ single pass intestinal perfusion (SPIP), bioavailability, chylomicron flow blocking study and bio-distribution profile...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27230902/development-and-optimization-of-self-emulsifying-drug-delivery-systems-sedds-for-enhanced-dissolution-and-permeability-of-rosuvastatin
#13
H Y Karasulu, E Gündoğdu, T Turgay, U Ö Türk, S Apaydın, I Yildırım Şimşir, C Yilmaz, E Karasulu
Rosuvastatin calcium is commonly used statin for treatment of dyslipidemia. It has low bioavailability. The aim of this study was to develop new rosuvastatin calcium self-emulsifying drug delivery systems (SEDDS) as an alternative formulation and to evaluate the permeability of rosuvastatin calcium SEDDS by using Caco-2 cells. Rosuvastatin calcium SEDDSs were developed by using pseudo ternary phase diagram and characterized by using heating cooling cycle, robustness to dilution, stability and in vitro drug release and permeability...
2016: Current Drug Delivery
https://www.readbyqxmd.com/read/27143595/impact-of-lipases-on-the-protective-effect-of-sedds-for-incorporated-peptide-drugs-towards-intestinal-peptidases
#14
Gintare Leonaviciute, Ožbej Zupančič, Felix Prüfert, Julia Rohrer, Andreas Bernkop-Schnürch
AIM: The aim of this study is the development of self-emulsifying drug delivery systems (SEDDS) differing in amounts of ester substructures and to evaluate their stability in presence of pancreatic lipase and protective effect against luminal enzymatic metabolism using leuprorelin as model peptide drug. METHODS: Hydrophobic leuprolide oleate was incorporated into three different SEDDS formulations and their stability towards pancreatic lipases was investigated utilizing a dynamic in vitro digestion model...
July 11, 2016: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27088585/decline-in-emergency-department-visits-for-acute-gastroenteritis-among-children-in-10-us-states-after-implementation-of-rotavirus-vaccination-2003-to-2013
#15
Minesh P Shah, Jacqueline E Tate, Claudia A Steiner, Umesh D Parashar
BACKGROUND: Rotavirus vaccination of all infants began in the United States in 2006. Although the effect of vaccination on childhood hospitalizations for rotavirus has been well described, the effects of rotavirus vaccine on emergency department (ED) visits are less well documented. METHODS: Using the State Emergency Department Databases for 10 US states, we compared the rates of gastroenteritis- and rotavirus-coded ED visits among children <5 years of age in prevaccine (2003 to 2006) with those in postvaccine (2008-2013) years; 2007 was excluded as a transition year...
July 2016: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/27051286/enhanced-dissolution-and-oral-absorption-of-tacrolimus-by-supersaturable-self-emulsifying-drug-delivery-system
#16
Dae Ro Lee, Myoung Jin Ho, Hyuck Jun Jung, Ha Ra Cho, Jun Seo Park, Suk-Hyun Yoon, Yong Seok Choi, Young Wook Choi, Chung-Hun Oh, Myung Joo Kang
A new Soluplus (polyvinyl caprolactam-polyvinyl acetate-polyethylene glycol graft copolymer)-based supersaturable self-emulsifying drug delivery system (S-SEDDS) was formulated to enhance oral absorption of tacrolimus (FK506) with minimal use of oil, surfactant, and cosurfactant. A high payload supersaturable system (S-SEDDS) was prepared by incorporating Soluplus, as a precipitation inhibitor, to SEDDS consisting of Capmul MCM, Cremophor EL, and Transcutol (FK506:vehicle:Soluplus =1:15:1). In vitro dissolution profile and in vitro pharmacokinetic aspect of S-SEDDS in rats were comparatively evaluated with those of conventional SEDDS formulas containing four times greater content of vehicle components (FK506:vehicle =1:60)...
2016: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/27049443/evaluation-of-environmental-sample-analysis-methods-and-results-reporting-in-the-national-children-s-study-vanguard-study
#17
Maire S A Heikkinen, Abdisalam Khalaf, Barbara Beard, Susan M Viet, Michael Dellarco
During the initial Vanguard phase of the U.S. National Children's Study (NCS), about 2000 tap water, surface wipe, and air samples were collected and analyzed immediately. The shipping conditions, analysis methods, results, and laboratory performance were evaluated to determine the best approaches for use in the NCS Main Study. The main conclusions were (1) to employ established sample analysis methods, when possible, and alternate methodologies only after careful consideration with method validation studies; (2) lot control and prescreening sample collection materials are important quality assurance procedures; (3) packing samples correctly requires careful training and adjustment of shipping conditions to local conditions; (4) trip blanks and spiked samples should be considered for samplers with short expiration times and labile analytes; (5) two study-specific results reports should be required: laboratory electronic data deliverables (EDD) of sample results in a useable electronic format (CSV or SEDD XML/CSV) and a data package with sample results and supporting information in PDF format...
May 3, 2016: Analytical Chemistry
https://www.readbyqxmd.com/read/27037924/formulation-and-evaluation-of-self-emulsifying-orlistat-tablet-to-enhance-drug-release-and-in-vivo-performance-factorial-design-approach
#18
Mukund Maruti Gade, Pramod Jayadevappa Hurkadale
The purpose of the present research work was to formulate, evaluate, and optimize self-emulsifying orlistat tablet to enhance drug release followed by in vivo antiobesity activity in Wistar rats. Initially, the solubility of orlistat was determined in different natural oils, surfactant, and co-surfactants. Self-emulsifying drug delivery system (SEDDS) was prepared by using castor oil, Tween 80, and Capryol PGMC as components. Liquid SEDDS evaluated for globule size and emulsification time. A 3(2) full factorial design was utilized for the optimization purpose...
June 2016: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/26923905/development-and-in-vitro-evaluation-of-an-oral-sedds-for-desmopressin
#19
Ožbej Zupančič, Gintare Leonaviciute, Hung Thanh Lam, Alexandra Partenhauser, Snežana Podričnik, Andreas Bernkop-Schnürch
CONTEXT: Self-emulsifying drug delivery systems (SEDDS) are among most promising tools for improving oral peptide bioavailability. OBJECTIVE: In this study, in vitro protective effect of SEDDS containing desmopressin against presystemic inactivation by glutathione and α-chymotrypsin was evaluated. MATERIALS AND METHODS: The partitioning coefficient (log P) of desmopressin was increased via hydrophobic ion pairing using anionic surfactants...
July 2016: Drug Delivery
https://www.readbyqxmd.com/read/26682191/formulation-optimization-and-evaluation-of-self-emulsifying-drug-delivery-systems-of-nevirapine
#20
Ramprasad Chintalapudi, T E G K Murthy, K Rajya Lakshmi, G Ganesh Manohar
BACKGROUND: The aim of the present study was to formulate and optimize the self-emulsifying drug delivery systems (SEDDS) of nevirapine (NVP) by use of 2(2) factorial designs to enhance the oral absorption of NVP by improving its solubility, dissolution rate, and diffusion profile. SEDDS are the isotropic mixtures of oil, surfactant, co-surfactant and drug that form oil in water microemulsion when introduced into the aqueous phase under gentle agitation. MATERIALS AND METHODS: Solubility of NVP in different oils, surfactants, and co-surfactants was determined for the screening of excipients...
October 2015: International Journal of Pharmaceutical Investigation
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