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Advanced Drug Delivery Reviews

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https://www.readbyqxmd.com/read/29339146/microspheres-as-intraocular-therapeutic-tools-in-chronic-diseases-of-the-optic-nerve-and-retina
#1
Irene Bravo-Osuna, Vanessa Andrés-Guerrero, Alicia Arranz-Romera, Sergio Esteban-Pérez, Irene T Molina-Martínez, Rocío Herrero-Vanrell
Pathologies affecting the optic nerve and the retina are one of the major causes of blindness. These diseases include age-related macular degeneration (AMD), diabetic Retinopathy (DR) and glaucoma, among others. Also, there are genetic disorders that affect the retina causing visual impairment. The prevalence of neurodegenerative diseases of the posterior segment are increased as most of them are related with the elderly. Even with the access to different treatments, there are some challenges in managing patients suffering retinal diseases...
January 12, 2018: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29339145/ocular-delivery-of-proteins-and-peptides-challenges-and-novel-formulation-approaches
#2
Abhirup Mandal, Dhananjay Pal, Vibhuti Agrahari, Hoang My Trinh, Mary Joseph, Ashim K Mitra
The impact of proteins and peptides on the treatment of various conditions including ocular diseases over the past few decades has been advanced by substantial breakthroughs in structural biochemistry, genetic engineering, formulation and delivery approaches. Formulation and delivery of proteins and peptides, such as monoclonal antibodies, aptamers, recombinant proteins and peptides to ocular tissues poses significant challenges owing to their large size, poor permeation and susceptibility to degradation. A wide range of advanced drug delivery systems including polymeric controlled release systems, cell-based delivery and nanowafers are being exploited to overcome the challenges of frequent administration to ocular tissues...
January 12, 2018: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29339144/addressing-barriers-to-effective-cancer-immunotherapy-with-nanotechnology-achievements-challenges-and-roadmap-to-the-next-generation-of-nanoimmunotherapeutics
#3
Enping Hong, Marina A Dobrovolskaia
Cancer is a complex systemic disorder that affects many organs and tissues and arises from the altered function of multiple cellular and molecular mechanisms. One of the systems malfunctioning in cancer is the immune system. Restoring and improving the ability of the immune system to effectively recognize and eradicate cancer is the main focus of immunotherapy, a topic which has garnered recent and significant interest. The initial excitement about immunotherapy, however, has been challenged by its limited efficacy in certain patient populations and the development of adverse effects such as therapeutic resistance and autoimmunity...
January 12, 2018: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29329995/multifunctional-hybrid-graphene-oxide-for-circulating-tumor-cell-isolation-and-analysis
#4
Avijit PramaniK, Stacy Jones, Ye Gao, Carrie Sweet, Aruna Vangara, Salma Begum, Paresh Chandra Ray
Even in 21st century, >90% cancer-associated deaths are caused by metastatic disease. Circulating tumor cells (CTCs), which circulate in the blood stream after release from primary tumors, extravasate and form fatal metastases in different organs. Several clinical trials indicate that CTCs can be used as a liquid biopsy of tumors for early diagnosis of cancers. Since CTCs are extremely rare and exhibit heterogeneous biology due to epithelial-mesenchymal transition (EMT), oncologists continue to face enormous challenges in using CTCs as a true "liquid biopsy" for cancer patients...
January 9, 2018: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29326054/size-based-separation-methods-of-circulating-tumor-cells
#5
Si-Jie Hao, Yuan Wan, Yi-Qiu Xia, Xin Zou, Si-Yang Zheng
Circulating tumor cells (CTCs) originate from the primary tumor mass and enter into the peripheral bloodstream. Compared to other "liquid biopsy" portfolios such as exosome, circulating tumor DNA/RNA (ctDNA/RNA), CTCs have incomparable advantages in analyses of transcriptomics, proteomics, and signal colocalization. Hence, CTCs hold the key to understanding the biology of metastasis and play a vital role in cancer diagnosis, treatment monitoring, and prognosis. Size-based enrichment featureS prominently in CTC isolation...
January 8, 2018: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29326053/molecular-analysis-of-circulating-tumors-cells-biomarkers-beyond-enumeration
#6
William L Hwang, Haley M Pleskow, David T Miyamoto
Advances in our molecular understanding of cancer biology have paved the way to an expanding compendium of molecularly-targeted therapies, accompanied by the urgent need for biomarkers that enable the precise selection of the most appropriate therapies for individual cancer patients. Circulating biomarkers such as circulating tumor cells (CTCs) are poised to fill this need, since they are "liquid biopsies" that can be performed non-invasively and serially, and may capture the spectrum of spatial and temporal tumor heterogeneity better than conventional tissue biopsies...
January 8, 2018: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29307632/co-association-of-mucus-modulating-agents-and-nanoparticles-for-mucosal-drug-delivery
#7
Catherine Taylor Nordgård, Kurt I Draget
Nanoparticulate drug delivery systems (nDDS) offer a variety of options when it comes to routes of administration. One possible path is crossing mucosal barriers, such as in the airways and in the GI tract, for systemic distribution or local treatment. The main challenge with this administration route is that the size and surface properties of the nanoparticles, as opposed to small molecular drugs, very often results in mucosal capture, immobilization and removal, which in turn results in a very low bioavailability...
January 4, 2018: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29288733/ophthalmic-gels-past-present-and-future
#8
Ali A Al-Kinani, Ghada Zidan, Naba Elsaid, Ali Seyfoddin, Adam W G Alani, Raid G Alany
Aqueous gels formulated using hydrophilic polymers (hydrogels) along with those based on stimuli responsive polymers (in situ gelling or gel forming systems) continue to attract increasing interest for various eye health-related applications. They allow the incorporation of a variety of ophthalmic pharmaceuticals to achieve sustained and therapeutic levels of drugs and bioactives at target ocular sites. The integration of sophisticated drug delivery technologies such as nanotechnology-based, intelligent and environment responsive systems can extend current treatment duration to provide more clinically relevant time courses (weeks and months instead of hours and days) which will inevitably reduce dose frequency, increase patient compliance and improve clinical outcomes...
December 27, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29288732/blood-derivatives-awaken-in-regenerative-medicine-strategies-to-modulate-wound-healing
#9
Bárbara B Mendes, Manuel Gómez-Florit, Pedro S Babo, Rui L Reis, Rui M A Domingues, Manuela E Gomes
Blood components play key roles in the modulation of the wound healing process and, together with the provisional fibrin matrix ability to selectively bind bioactive molecules and control its spatial-temporal presentation, define the complex microenvironment that characterize this biological process. As a biomimetic approach, the use of blood derivatives in regenerative strategies has awaken as a source of multiple therapeutic biomolecules. Nevertheless, and despite their clinical relevance, blood derivatives have been showing inconsistent therapeutic results due to several factors, including proper control over their delivery mechanisms...
December 27, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29288033/targeting-renal-fibrosis-mechanisms-and-drug-delivery-systems
#10
Madalina V Nastase, Jinyang Zeng-Brouwers, Malgorzata Wygrecka, Liliana Schaefer
Renal fibrosis is the common outcome of many chronic kidney diseases (CKD) independent of the underlying etiology. Despite a host of promising experimental data, currently available strategies only ameliorate or delay the progression of CKD but do not reverse fibrosis. One of the major impediments of translating novel antifibrotic strategies from bench to bedside is due to the intricacies of the drug delivery process. In this review, we briefly describe mechanisms of renal fibrosis and methods of drug transfer into the kidney...
December 26, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29278683/rescue-plan-for-achilles-therapeutics-steering-the-fate-and-functions-of-stem-cells-in-tendon-wound-healing
#11
Magdalena Schneider, Peter Angele, Tero A H Järvinen, Denitsa Docheva
Due to the increasing age of our society and a rise in engagement of young people in extreme and/or competitive sports, both tendinopathies and tendon ruptures present a clinical and financial challenge. Tendon has limited natural healing capacity and often responds poorly to treatments, hence it requires prolonged rehabilitation in most cases. Till today, none of the therapeutic options has provided successful long-term solutions, meaning that repaired tendons do not recover their complete strength and functionality...
December 23, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29277543/microfluidics-for-producing-poly-lactic-co-glycolic-acid-based-pharmaceutical-nanoparticles
#12
Xuanyu Li, Xingyu Jiang
Microfluidic chips allow the rapid production of a library of nanoparticles (NPs) with distinct properties by changing the precursors and the flow rates, significantly decreasing the time for screening optimal formulation as carriers for drug delivery compared to conventional methods. The batch-to-batch reproducibility which is essential for clinical translation is achieved by precisely controlling the precursors and the flow rate, regardless of operators. Poly (lactic-co-glycolic acid) (PLGA) is the most widely used Food and Drug Administration (FDA)-approved biodegradable polymers...
December 22, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29273517/mirna-delivery-for-skin-wound-healing
#13
Zhao Meng, Dezhong Zhou, Yongsheng Gao, Ming Zeng, Wenxin Wang
The wound healing has remained a worldwide challenge as one of significant public health problems. Pathological scars and chronic wounds caused by injury, aging or diabetes lead to impaired tissue repair and regeneration. Due to the unique biological wound environment, the wound healing is a highly complicated process, efficient and targeted treatments are still lacking. Hence, research-driven to discover more efficient therapeutics is a highly urgent demand. Recently, the research results have revealed that microRNA (miRNA) is a promising tool in therapeutic and diagnostic fields because miRNA is an essential regulator in cellular physiology and pathology...
December 19, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29273516/current-and-future-technological-advances-in-transdermal-gene-delivery
#14
Xianfeng Chen
Transdermal gene delivery holds significant advantages as it is able to minimize the problems of systemic administration such as enzymatic degradation, systemic toxicity, and poor delivery to target tissues. This technology has the potential to transform the treatment and prevention of a range of diseases. However, the skin poses a great barrier for gene delivery because of the "bricks-and-mortar" structure of the stratum corneum and the tight junctions between keratinocytes in the epidermis. This review systematically summarizes the typical physical and chemical approaches to overcome these barriers and facilitate gen delivery via skin for applications in vaccination, wound healing, skin cancers and skin diseases...
December 19, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29269274/engineered-cell-and-tissue-models-of-pulmonary-fibrosis
#15
Aswin Sundarakrishnan, Ying Chen, Lauren D Black, Bree B Aldridge, David L Kaplan
Pulmonary fibrosis includes several lung disorders characterized by scar formation and Idiopathic Pulmonary Fibrosis (IPF) is a particularly severe form of pulmonary fibrosis of unknown etiology with a mean life expectancy of 3 years' post diagnosis. Treatments for IPF are limited to two FDA approved treatments, pirfenidone and nintedanib. Most lead candidate drugs that are identified in pre-clinical animal studies fail in human clinical trials. Thus, there is a need for advanced humanized in vitro models of the lung to improve candidate treatments prior to moving to human clinical trials...
December 18, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29262296/electroactive-biomaterials-vehicles-for-controlled-delivery-of-therapeutic-agents-for-drug-delivery-and-tissue-regeneration
#16
Biranche Tandon, Adrián Magaz, Richard Balint, Jonny J Blaker, Sarah H Cartmell
Electrical stimulation for delivery of biochemical agents such as genes, proteins and RNA molecules amongst others, holds great potential for controlled therapeutic delivery and in promoting tissue regeneration. Electroactive biomaterials have the capability of delivering these agents in a localized, controlled, responsive and efficient manner. These systems have also been combined for the delivery of both physical and biochemical cues and can be programmed to achieve enhanced effects on healing by establishing control over the microenvironment...
December 17, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29248480/functional-therapies-for-cutaneous-wound-repair-in-epidermolysis-bullosa
#17
Patricia Peking, Ulrich Koller, Eva M Murauer
Chronic wounding as a result of recurrent skin blistering in the painful genetic skin disease epidermolysis bullosa, may lead to life-threatening infections, increased risk of tumor formation, and other serious medical complications. Therefore, epidermolysis bullosa patients have an urgent need for optimal wound care and tissue regeneration. Therapeutic strategies using gene-, protein-, and cell-therapies are being developed to improve clinical symptoms, and some of them have already been investigated in early clinical trials...
December 14, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29248479/nanomaterials-and-molecular-transporters-to-overcome-the-bacterial-envelope-barrier-towards-advanced-delivery-of-antibiotics
#18
Rita S Santos, Céu Figueiredo, Nuno F Azevedo, Kevin Braeckmans, Stefaan C De Smedt
With the dramatic consequences of bacterial resistance to antibiotics, nanomaterials and molecular transporters have started to be investigated as alternative antibacterials or anti-infective carrier systems to improve the internalization of bactericidal drugs. However, the capability of nanomaterials/molecular transporters to overcome the bacterial cell envelope is poorly understood. It is critical to consider the sophisticated architecture of bacterial envelopes and reflect how nanomaterials/molecular transporters can interact with these envelopes, being the major aim of this review...
December 14, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29248478/expression-activity-and-pharmacokinetic-impact-of-ocular-transporters
#19
Kati-Sisko Vellonen, Laura Pelkonen, Eliisa Mannermaa, Marika Ruponen, Arto Urtti, Heidi Kidron
The eye is protected by several tissues that limit the permeability and entry of potentially harmful substances, but also hamper the delivery of drugs in the treatment of ocular diseases. Active transport across the ocular barriers may affect drug distribution, but the impact of drug transporters on ocular drug delivery is not well known. We have collected and critically reviewed the literature for ocular expression and activity of known drug transporters. The review concentrates on drug transporters that have been functionally characterized in ocular tissues or primary cells and on transporters for which there is available expression data at the protein level...
December 14, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29247767/implications-of-melanin-binding-in-ocular-drug-delivery
#20
Anna-Kaisa Rimpelä, Mika Reinisalo, Laura Hellinen, Evgeni Grazhdankin, Heidi Kidron, Arto Urtti, Eva M Del Amo
Pigmented ocular tissues contain melanin within the intracellular melanosomes. Drugs bind to melanin at varying extent that ranges from no binding to extensive binding. Binding may lead to drug accumulation to the pigmented tissues and prolonged drug retention in the melanin containing cells. Therefore, melanin binding is an important feature that affects ocular drug delivery and biodistribution, but this topic has not been reviewed since 1998. In this review, we present current knowledge on ocular melanin, melanosomes and binding of drugs to pigmented cells and tissues...
December 13, 2017: Advanced Drug Delivery Reviews
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