Abstract:
BACKGROUND:The advent of therapeutic proteins highlights the need for delivery systems that protect and extend the duration of its action. Ranibizumab-VEGF is one such drug used for treating wet AMD. This paper describes a facile method to sustain bioactive ranibizumab release from PLGA-based particles. METHODS:Two emulsion techniques were explored namely: water-in-oil-in-water (WOW) and solid-in-oil-in-water (SOW) emulsion. The bioactivity of ranibizumab was evaluated by comparing its binding capability to VEGF, measured with ELISA to total protein measured by microBCA. RESULTS:During the emulsion process, contact of ranibizumab with the water-oil interface is the main destabilizing factor and this can be prevented with the use of amphiphilic PVA and solid-state protein in WOW and SOW emulsion respectively. In vitro release of the ranibizumab-loaded particles indicated that a 15-day release could be achieved with SOW particles while the WOW particles generally suffered from a burst release. Released ranibizumab was capable of inhibiting endothelial cell growth indicating its retention of bioactivity. The suppression of burst release from the SOW particles was attributed to the relatively smooth surface morphology of the SOW microparticles. CONCLUSIONS:The use of SOW encapsulation in modulating ranibizumab release while maintaining their bioactivity has been highlighted.
journal_name
Expert Opin Drug Delivjournal_title
Expert opinion on drug deliveryauthors
Chua HY,Lui YS,Bhuthalingam R,Agrawal R,Wong T,Preiser PR,Venkatraman Sdoi
10.1080/17425247.2018.1538209subject
Has Abstractpub_date
2018-12-01 00:00:00pages
1143-1156issue
12eissn
1742-5247issn
1744-7593journal_volume
15pub_type
杂志文章abstract:INTRODUCTION:Most vaccines are administered by intramuscular injection using a hypodermic needle and syringe. Some limitations of this procedure include reluctance to be immunized because of fear of needlesticks, and concerns associated with the safe disposal of needles after their use. Skin delivery is an alternate ro...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1517/17425247.2014.885947
更新日期:2014-04-01 00:00:00
abstract:INTRODUCTION:In the therapy of clinical diseases such as cancer, it is important to deliver drugs directly to tumor sites in order to maximize local drug concentration and reduce side effects. This objective may be realized by using 'smart' nanoparticles (NPs) as drug delivery systems, because they enable dramatic conf...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1517/17425247.2015.1071352
更新日期:2015-01-01 00:00:00
abstract:INTRODUCTION:Superparamagnetic iron oxide nanoparticle (SPION)-based carrier systems have many advantages over other nanoparticle-based systems. They are biocompatible, biodegradable, facilely tunable and superparamagnetic and thus controllable by an external magnetic field. These attributes enable their broad biomedic...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1517/17425247.2013.747507
更新日期:2013-01-01 00:00:00
abstract:INTRODUCTION:Gastroretentive floating drug delivery systems have emerged as efficient approaches for enhancing the bioavailability and controlled delivery of various therapeutic agents. Significant advancements exploiting chitosan have been made worldwide, in order to investigate these systems according to patient requ...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1517/17425247.2012.673581
更新日期:2012-05-01 00:00:00
abstract::Noninvasive, transient and local image-guided blood-brain barrier disruption can be accomplished using focused ultrasound exposure with intravascular injection of preformed microbubbles. MRI-guided blood-brain barrier disruption has been demonstrated and has been shown to heal in within a few hours after exposure. The...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1517/17425247.4.1.27
更新日期:2007-01-01 00:00:00
abstract:BACKGROUND:Pressurized metered-dose inhalers (pMDIs) include hydrofluoroalkane (HFA) propellant to generate a drug aerosol upon actuation and drugs can be formulated as solution or suspension. Suspended particles can cream or sediment depending on density differences between drug and propellant and shaking the pMDI is ...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章
doi:10.1080/17425247.2020.1767066
更新日期:2020-07-01 00:00:00
abstract:OBJECTIVES:This study focuses on the development of amlodipine bilayer buccal tablets of hydroxypropyl methylcellulose (HPMC) matrix system containing polyacrylate polymer (Carbopol(®))/β-cyclodextrin as the drug layer and ethylcellulose as the non-swellable backing layer, and their biointerfacial phenomena. METHODS:T...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章
doi:10.1517/17425247.2016.1154038
更新日期:2016-01-01 00:00:00
abstract:INTRODUCTION:RNA interference (RNAi) is a powerful mechanism for gene silencing with the potential to greatly impact the development of new therapies for many human diseases. Short interfering RNAs (siRNAs) may be the ideal molecules for therapeutic RNAi. However, therapeutic siRNAs face significant challenges that mus...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1517/17425247.2014.866089
更新日期:2014-02-01 00:00:00
abstract:BACKGROUND:Augmentation of simvastatin (SMV) cytotoxicity in breast carcinoma cell lines MCF-7, by: improvement of cellular uptake and loading on alpha lipoic acid (ALA). METHODS:In this study, SMV was loaded on ALA nanoparticles and characterized for surface morphology, SMV entrapment efficiency percent (%EE), zeta p...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章
doi:10.1080/17425247.2016.1236788
更新日期:2016-12-01 00:00:00
abstract:INTRODUCTION:Transportation of the nutrients and other substances from the blood to the brain is selectively controlled by the brain capillary endothelial cells that form a restrictive barrier, so-called blood-brain barrier (BBB). Currently, there is no unimpeachable approach to overcome the BBB obstructiveness because...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1080/17425247.2019.1614911
更新日期:2019-06-01 00:00:00
abstract::Introduction: Pulmonary drug delivery is a complex field of research combining physics which drive aerosol transport and deposition and biology which underpins efficacy and toxicity of inhaled drugs. A myriad of preclinical methods, ranging from in-silico to in-vitro, ex-vivo and in-vivo, can be implemented.Areas cove...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1080/17425247.2020.1730807
更新日期:2020-04-01 00:00:00
abstract:INTRODUCTION:Macrophages are involved in the normal defense of the body; however, the varying phenotypes of macrophages and imbalance in their ratio lead to the impairment of immune response initiating the production of inflammation. As the role of macrophages in immunological disorders and their surface receptors modu...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1080/17425247.2020.1783237
更新日期:2020-09-01 00:00:00
abstract:BACKGROUND:Injectable life-saving drugs should not be exposed to temperatures <4°C/39°F or >30°C/86°F. Frequently, weather conditions exceed these temperature thresholds in many countries. Insulin is to be kept at 4-8°C/~ 39-47°F until use and once opened, is supposed to be stable for up to 31 days at room temperature ...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章
doi:10.1080/17425247.2017.1316261
更新日期:2017-06-01 00:00:00
abstract:INTRODUCTION:Diseases of the inner ear include those of the auditory and vestibular systems, and frequently result in disabling hearing loss or vertigo. Despite a rapidly expanding pipeline of potential cochlear therapeutics, the inner ear remains a challenging organ for targeted drug delivery, and new technologies are...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1517/17425247.2015.974548
更新日期:2015-03-01 00:00:00
abstract:BACKGROUND:Liposomes, phospholipids, nanosized bubbles with a bilayered membrane structure, have drawn a lot of interest as pharmaceutical carriers for drugs and genes. In particular, liposomes are widely used for drug delivery into tumors. OBJECTIVE:In many cases, to enhance the efficacy of the liposomal drugs, drug-...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1517/17425247.5.9.1003
更新日期:2008-09-01 00:00:00
abstract:INTRODUCTION:A major problem in ocular therapeutics with classical formulations is the maintenance of an effective drug concentration at the site of action for a long period of time. Enhancement of ocular bioavailability with increased dose penetration and longer retention time at desired sites can be achieved by recen...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1517/17425247.2012.681775
更新日期:2012-06-01 00:00:00
abstract:INTRODUCTION:Cancer is a leading cause of death worldwide and efficient new strategies are urgently needed to combat its high mortality and morbidity statistics. Fortunately, over the years, nanotechnology has evolved as a frontrunner in the areas of imaging, diagnostics and therapy, giving the possibility of monitorin...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1080/17425247.2016.1205585
更新日期:2017-01-01 00:00:00
abstract:INTRODUCTION:Polymeric microspheres have been established as a valuable parenteral drug delivery system for sustained release of therapeutic agents via subcutaneous or intramuscular injection. AREAS COVERED:Biodegradable polymers which are either synthetic or from natural sources are reviewed with respect to recent ad...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1517/17425247.2012.709844
更新日期:2012-09-01 00:00:00
abstract::Introduction: Incorrect inhaler technique is one reason why the efficacies of inhaled asthma treatments in clinical trials and effectiveness in the real world differ. Inhaler technique is critical for drug delivery to the lungs; incorrect technique negatively impacts asthma control and long-term outcomes. Breath-trigg...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1080/17425247.2019.1689957
更新日期:2019-12-01 00:00:00
abstract:INTRODUCTION:Reversible Addition Fragmentation Chain Transfer (RAFT) polymerisation is now an established tool for polymer chemists to create various polymer architectures with precise control over the molecular weight, and to install a variety of different moieties onto the polymer chain ends. Recently, there seems to...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1517/17425247.2011.548381
更新日期:2011-02-01 00:00:00
abstract:INTRODUCTION:Amphiphilic block copolymers are recognized components of parenteral drug nanocarriers. However, their performance in oral administration has barely been evaluated to any great extent. AREAS COVERED:This review provides an overview of the methods used to prepare drug-loaded polymeric micelles and to evalu...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1517/17425247.2015.960841
更新日期:2015-02-01 00:00:00
abstract::With the advent of new, and often expensive, therapeutics designed for aerosol delivery to the lung, there is a need to improve the targeting and efficiency of their delivery. By controlling breathing patterns associated with inhaled aerosols, it has been shown that deposition in the lung can be both maximised and tar...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章
doi:10.1517/17425247.2.4.763
更新日期:2005-07-01 00:00:00
abstract::Cancer is the second leading cause of death in the US. Currently, protocols for cancer treatment include surgery to remove diseased and suspect tissues, focused radiation, systemic chemotherapy, immunotherapy and their combinations. With conventional chemotherapy, it is almost impossible to deliver anticancer drugs sp...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1517/17425240903085128
更新日期:2009-08-01 00:00:00
abstract:OBJECTIVES:The aim of the present study is to evaluate the influence of factors such as biopharmaceutical properties and study protocol on the emptying of pellets from the human stomach in a fed state. METHODS:A systematic literature search for data on human gastric emptying of pellets from a fed stomach state investi...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章
doi:10.1517/17425247.2015.1035707
更新日期:2015-08-01 00:00:00
abstract:IMPORTANCE OF THE FIELD:Active targeting of bioactive molecules by physicochemical association with hyaluronic acid (HA) is an attractive approach in current nanomedicine because HA is biocompatible, non-toxic and non-inflammatory. AREAS COVERED IN THIS REVIEW:This review focuses on synthesis, physicochemical characte...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1517/17425241003730399
更新日期:2010-06-01 00:00:00
abstract:IMPORTANCE OF THE FIELD:The prediction of the in vivo drug release characteristics of modified release (MR) oral dosage forms by in vitro dissolution tests is a prerequisite for successful product development. AREAS COVERED IN THIS REVIEW:To improve the predictive power of dissolution testing, the authors recently dev...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1517/17425247.2010.527943
更新日期:2010-11-01 00:00:00
abstract:INTRODUCTION:In any manufacturing process, the success of producing an end product with the desired properties and yield depends on a range of factors that include the equipment, process and formulation variables. It is the interest of manufacturers and researchers to understand each manufacturing process better and as...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1517/17425247.2014.915805
更新日期:2014-07-01 00:00:00
abstract:INTRODUCTION:Neurodegenerative diseases (NDs) represent a group of different clinical entities that, despite the specific primary etiologies, share a common signature in terms of a general mitochondrial dysfunction with consequent oxidative stress accumulation. As these two events occur early during neurodegenerative p...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1080/17425247.2016.1218461
更新日期:2017-04-01 00:00:00
abstract:INTRODUCTION:Oral delivery of therapeutic peptide hormones offers the promise of greater patient compliance when compared to parenteral administration routes. However, it is a huge challenge in the pharmaceutical field. Due to increasing demand for oral delivery of peptide hormones such as insulin, gonadotropin-releasi...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1517/17425247.2016.1142526
更新日期:2016-01-01 00:00:00
abstract::Skin diseases are prevalent and can significantly affect quality of life. Empirical mathematical models retrospectively analyse data to predict skin permeation from the physico-chemical properties of drugs. Quantitative structure permeability relationships are discussed, along with alternatives to linear modelling. Me...
journal_title:Expert opinion on drug delivery
pub_type: 杂志文章,评审
doi:10.1517/17425240902865561
更新日期:2009-04-01 00:00:00