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https://www.readbyqxmd.com/read/29346275/a-review-on-recent-advances-in-stabilizing-peptides-proteins-upon-fabrication-in-hydrogels-from-biodegradable-polymers
#1
REVIEW
Faisal Raza, Hajra Zafar, Ying Zhu, Yuan Ren, Aftab -Ullah, Asif Ullah Khan, Xinyi He, Han Han, Md Aquib, Kofi Oti Boakye-Yiadom, Liang Ge
Hydrogels evolved as an outstanding carrier material for local and controlled drug delivery that tend to overcome the shortcomings of old conventional dosage forms for small drugs (NSAIDS) and large peptides and proteins. The aqueous swellable and crosslinked polymeric network structure of hydrogels is composed of various natural, synthetic and semisynthetic biodegradable polymers. Hydrogels have remarkable properties of functionality, reversibility, sterilizability, and biocompatibility. All these dynamic properties of hydrogels have increased the interest in their use as a carrier for peptides and proteins to be released slowly in a sustained manner...
January 18, 2018: Pharmaceutics
https://www.readbyqxmd.com/read/29342879/ophthalmic-drug-delivery-systems-for-antibiotherapy-a-review
#2
REVIEW
Marion Dubald, Sandrine Bourgeois, Véronique Andrieu, Hatem Fessi
The last fifty years, ophthalmic drug delivery research has made much progress, challenging scientists about the advantages and limitations of this drug delivery approach. Topical eye drops are the most commonly used formulation in ocular drug delivery. Despite the good tolerance for patients, this topical administration is only focus on the anterior ocular diseases and had a high precorneal loss of drugs due to the tears production and ocular barriers. Antibiotics are popularly used in solution or in ointment for the ophthalmic route...
January 13, 2018: Pharmaceutics
https://www.readbyqxmd.com/read/29342839/calcium-phosphates-as-delivery-systems-for-bisphosphonates
#3
REVIEW
Adriana Bigi, Elisa Boanini
Bisphosphonates (BPs) are the most utilized drugs for the treatment of osteoporosis, and are usefully employed also for other pathologies characterized by abnormally high bone resorption, including bone metastases. Due to the great affinity of these drugs for calcium ions, calcium phosphates are ideal delivery systems for local administration of BPs to bone, which is aimed to avoid/limit the undesirable side effects of their prolonged systemic use. Direct synthesis in aqueous medium and chemisorptions from solution are the two main routes proposed to synthesize BP functionalized calcium phosphates...
January 13, 2018: Journal of Functional Biomaterials
https://www.readbyqxmd.com/read/29342360/sustained-delivery-of-doxorubicin-via-acetalated-dextran-scaffold-prevents-glioblastoma-recurrence-after-surgical-resection
#4
Elizabeth G Graham-Gurysh, Kathryn M Moore, Andrew B Satterlee, Kevin T Sheets, Feng-Chang Lin, Eric M Bachelder, C Ryan Miller, Shawn Hingtgen, Kristy M Ainslie
The primary cause of mortality for glioblastoma (GBM) is local tumor recurrence following standard-of-care therapies, including surgical resection. With most tumors recurring near the site of surgical resection, local delivery of chemotherapy at the time of surgery is a promising strategy. Herein drug loaded polymer scaffolds with two distinct degradation profiles were fabricated to investigate the effect of local drug delivery rate on GBM recurrence following surgical resection. The novel biopolymer, acetalated dextran (Ace-DEX), was compared to commercially available polyester, poly(L-lactide) (PLA)...
January 17, 2018: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29342359/semiconducting-photothermal-nanoagonist-for-remote-controlled-specific-cancer-therapy
#5
Xu Zhen, Chen Xie, Yuyan Jiang, Xiangzhao Ai, Bengang Xing, Kanyi Pu
Nanomedicines have shown success in cancer therapy, but the pharmacological actions of most nanomedicine are often nonspecific to cancer cells because of utilization of the therapeutic agents that induce cell apoptosis from inner organelles. We herein report the development of semiconducting photothermal nanoagonists that can remotely and specifically initiate the apoptosis of cancer cells from cell membrane. The organic nanoagonists comprise semiconducting polymer nanoparticles (SPNs) and capsaicin (Cap) as the photothermally-responsive nanocarrier and the agonist for activation of transient receptor potential cation channel subfamily V member 1 (TRPV1), respectively...
January 17, 2018: Nano Letters
https://www.readbyqxmd.com/read/29340981/nanolipid-gel-of-an-antimycotic-drug-for-treating-vulvovaginal-candidiasis-development-and-evaluation
#6
Dnyanesh Takalkar, Namita Desai
This paper focuses on the development and evaluation of mucoadhesive vaginal gel of fluconazole using nanolipid carriers to enhance tissue deposition in treating vulvovaginal candidiasis. Treatment of vulvovaginal candidiasis includes antimycotic agents prescribed for 1 to 7 days or longer, in relapse either orally or topically. The delivery of fluconazole as nanolipid carriers in vaginal gel can be proposed as suitable alternative to the existing conventional formulations to improve the patient acceptability, compliance and localized drug action...
January 16, 2018: AAPS PharmSciTech
https://www.readbyqxmd.com/read/29340346/effects-of-local-drug-and-chemical-compound-delivery-on-bone-regeneration-around-dental-implants-in-animal-models-a-systematic-review-and-meta-analysis
#7
Ali Alenezi, Bruno Chrcanovic, Ann Wennerberg
PURPOSE: One of the suggested methods for enhancing osseointegration is the local application of drug agents around implant surfaces. The aim of this review was to evaluate the methods most commonly used for local drug and chemical compound delivery to implant sites and assess their influence on osseointegration. MATERIALS AND METHODS: An electronic search was undertaken in three databases (PubMed, Scopus, Embase). The search was limited to animal experiments using endosseous implants combined with local drug delivery systems...
January 2018: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29339580/advantages-of-soft-subdural-implants-for-the-delivery-of-electrochemical-neuromodulation-therapies-to-the-spinal-cord
#8
Marco Capogrosso, Jérôme Gandar, Nathan Greiner, Eduardo Martin Moraud, Nikolaus Wenger, Polina Shkorbatova, Pavel E Мusienko, Ivan Minev, Stephanie P Lacour, Gregoire Courtine
We recently developed soft neural interfaces enabling the delivery of electrical and chemical stimulation to the spinal cord. These stimulations restored locomotion in animal models of paralysis. Soft interfaces can be placed either below or above the dura mater. Theoretically, the subdural location combines many advantages, including increased selectivity of electrical stimulation, lower stimulation thresholds, and targeted chemical stimulation through local drug delivery. However, these advantages have not been documented, nor have their functional impact been studied in-silico or in a relevant animal model of neurological disorders using a multimodal neural interface...
January 17, 2018: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29339249/semifluorinated-alkane-based-systems-for-enhanced-corneal-penetration-of-poorly-soluble-drugs
#9
Priyanka Agarwal, Dieter Scherer, Bernhard Günther, Ilva D Rupenthal
Semifluorinated alkanes (SFAs) are amphiphilic liquids that can dissolve hydrophobic drugs to form clear solutions. This study evaluated the potential of two SFAs to act as vehicle for topical ocular drug delivery. After confirming ocular safety, an ex vivo corneal penetration model was developed to determine drug distribution and corneal bioavailability. Hydrophobic dye distribution in the different corneal layers was visualised under a confocal microscope. Corneal bioavailability of cyclosporine A (CsA) dissolved in perfluorobutylpentane (F4H5) or perfluorohexyloctane (F6H8) was compared to commercially available CsA ophthalmic emulsions, Restasis® and Ikervis®...
January 12, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29339187/doxorubicin-loaded-dendritic-fe3o4-supramolecular-nanoparticles-for-magnetic-drug-targeting-and-tumor-regression-in-spheroid-murine-melanoma-model
#10
Saumya Nigam, D Bahadur
This work evaluates the magnetically-guided delivery of DOX-loaded dendritic-Fe3O4 nanoparticles and their tumor regression efficacy in subcutaneous melanoma in C57BL/6 mice. The hematological, biochemical and histopathological parameters were minimally affected. The nanoparticles localized in lungs, liver and spleen suggesting non-specific uptake. However, in tumor-bearing mice, substantially higher localization in magnetically-targeted tumor was observed when compared to passive localization in non-targeted tumor...
January 12, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29336552/engineering-the-surface-of-therapeutic-living-cells
#11
Jooyeon Park, Brenda Andrade, Yongbeom Seo, Myung-Joo Kim, Steven C Zimmerman, Hyunjoon Kong
Biological cells are complex living machines that have garnered significant attention for their potential to serve as a new generation of therapeutic and delivery agents. Because of their secretion, differentiation, and homing activities, therapeutic cells have tremendous potential to treat or even cure various diseases and injuries that have defied conventional therapeutic strategies. Therapeutic cells can be systemically or locally transplanted. In addition, with their ability to express receptors that bind specific tissue markers, cells are being studied as nano- or microsized drug carriers capable of targeted transport...
January 16, 2018: Chemical Reviews
https://www.readbyqxmd.com/read/29336463/protein-corona-in-drug-delivery-for-multimodal-cancer-therapy-in-vivo
#12
Eugenia Li Ling Yeo, Patricia Soo Ping Thong, Khee Chee Soo, James Chen Yong Kah
The protein corona is inevitably formed on nanoparticles (NPs) when they are introduced in vivo and has been associated with a reduction in targeting yield, immune recognition and rapid blood clearance, leading to poor tumor accumulation. We have recently shown that it is possible to exploit the protein corona for drug delivery by exploiting it for loading and triggering the release of a photosensitizer Chlorin e6 (Ce6) for simultaneous photodynamic (PDT) and photothermal therapy (PTT) in vitro. Here, we extended our previous in vitro studies to evaluate its effectiveness in vivo...
January 16, 2018: Nanoscale
https://www.readbyqxmd.com/read/29336451/the-uptake-retention-and-clearance-of-drug-loaded-dendrimer-nanoparticles-in-astrocytes-electrophysiological-quantification
#13
Helena H Chowdhury, Susana R Cerqueira, Nuno Sousa, Joaquim M Oliveira, Rui L Reis, Robert Zorec
Nanoparticle-based drug delivery systems may impose risks to patients due to potential toxicity associated with a lack of clearance from cells or prolonged carrier-cell retention. This work evaluates vesicular cell uptake, retention and the possible transfer of endocytosed methylprednisolone-loaded carboxymethylchitosan/poly(amidoamine) dendrimer nanoparticles (NPs) into secretory vesicles of rat cultured astrocytes. The cells were incubated with NPs and unitary vesicle fusions/fissions with the plasma membrane were monitored employing high-resolution membrane capacitance measurements...
January 16, 2018: Biomaterials Science
https://www.readbyqxmd.com/read/29336264/taxifolin-evaluation-through-ex-vivo-permeations-on-human-skin-and-porcine-vaginal-mucosa
#14
Michele Campos Alves, Priscila Aparecida de Almeida, Hudson Caetano Polonini, Carla Aparecida Pereira Bhering, Anderson de Oliveira Ferreira, Marcos Antonio Fernandes Brandao, Nadia Rezende Barbosa Raposo
BACKGROUND: Taxifolin (TAX) is a flavonoid that has numerous pharmacological properties, including an antioxidant ability superior to that of other flavonoids due to its particular structure. Nevertheless, it has low oral bioavailability, which limits its therapeutic application. In this context, potentially important approaches for systemic drug delivery could be by alternative routes such as skin and vaginal mucosa, once both routes have a variety of advantages compared with the oral route, including the ability to bypass both first-pass hepatic metabolism and the consequent degradation in the gastrointestinal tract...
January 15, 2018: Current Drug Delivery
https://www.readbyqxmd.com/read/29336261/formulation-and-investigation-of-a-lipid-based-delivery-system-containing-antimicrobials-for-the-treatment-of-periodontal-disease
#15
Attila Leber, Maria Budai-Szucs, Edit Urban, Peter Valyi, Anita Kovacs, Szilvia Berko, Erzsebet Csanyi
BACKGROUND: Periodontitis is a chronic inflammatory disease, which affects the supporting tissues of the teeth, and without proper treatment it may lead to tooth loss. Antibiotics - dministered orally - have been widely used in the treatment of periodontitis. With the conventional administration routes, adequate drug levels cannot be reached in the periodontal pockets and oral application of antimicrobials could lead to side effects. Drug delivery systems containing antibiotics, administered at the site of infection, could possibly help eliminate pathogen bacteria and treat periodontitis...
January 15, 2018: Current Drug Delivery
https://www.readbyqxmd.com/read/29334814/dual-ligand-modified-liposomes-provide-effective-local-targeted-delivery-of-lung-cancer-drug-by-antibody-and-tumor-lineage-homing-cell-penetrating-peptide
#16
Congcong Lin, Xue Zhang, Hubiao Chen, Zhaoxiang Bian, Ge Zhang, Muhammad Kashif Riaz, Deependra Tyagi, Ge Lin, Yanbo Zhang, Jinjin Wang, Aiping Lu, Zhijun Yang
The abilities of a drug delivery system to target and penetrate tumor masses are key factors in determining the system's chemotherapeutic efficacy. Here, we explored the utility of an anti-carbonic anhydrase IX (anti-CA IX) antibody and CPP33 dual-ligand modified triptolide-loaded liposomes (dl-TPL-lip) to simultaneously enhance the tumor-specific targeting and increase tumor cell penetration of TPL. In vitro, the dl-TPL-lip increased the cytotoxicity of TPL in CA IX-positive lung cancer cells, which showed tunable size (137...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29334759/redox-nano-architectures-perspectives-and-implications-in-diagnosis-and-treatment-of-human-diseases
#17
Shamim Akhtar Sufi, Sankar Pajaniradje, Victor Mukherjee, Rukkumani Rajagopalan
Significance - Efficient targeted therapy with minimal side effects is the need of the hour.. Locally altered redox state is observed in several human ailments, such as inflammation, sepsis, and cancer. This has been taken advantage in designing redox-responsive nano-drug carriers. Redox-responsive nanosystems open a door to multitude of possibilities for the control of diseases over other drug delivery systems. Recent Advances -The first generation nanotherapy relies on novel properties of nanomaterials to shield the drug and deliver it to the diseased tissue or organ...
January 15, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29334299/mucoadhesive-buccal-film-containing-ornidazole-and-dexamethasone-for-oral-ulcers-in-vitro-and-in-vivo-studies
#18
Chengliang Zhang, Yanan Liu, Wei Li, Ping Gao, Dong Xiang, Xiuhua Ren, Dong Liu
A bilayered mucoadhesive buccal film containing a combination of ornidazole (OD) and dexamethasone sodium phosphate (DEX) was prepared using solvent casting to treat oral ulcers. Films were systematically evaluated in vitro to obtain the optimum formulation. The therapeutic effects of these films were investigated in the rabbit oral ulcer model and the in vivo release of OD and DEX in the human oral cavity was also evaluated. The backing layer contained ethyl cellulose and an optimal mucoadhesive layer containing both OD and DEX was produced...
January 15, 2018: Pharmaceutical Development and Technology
https://www.readbyqxmd.com/read/29333521/nanomaterials-for-convection-enhanced-delivery-of-agents-to-treat-brain-tumors
#19
Young-Eun Seo, Tom Bu, W Mark Saltzman
Nanomaterials represent a promising and versatile platform for the delivery of therapeutics to the brain. Treatment of brain tumors has been a long-standing challenge in the field of neuro-oncology. The current standard of care - a multimodal approach of surgery, radiation and chemotherapy - yields only a modest therapeutic benefit for patients with malignant gliomas. A major obstacle for treatment is the failure to achieve sufficient delivery of therapeutics at the tumor site. Recent advances in local drug delivery techniques, along with the development of highly effective brain-penetrating nanocarriers, have significantly improved treatment and imaging of brain tumors in preclinical studies...
December 2017: Current Opinion in Biomedical Engineering
https://www.readbyqxmd.com/read/29332842/ligand-cascading-nano-delivery-devices-to-enable-multiscale-targeting-of-anti-neurodegenerative-therapeutics
#20
Adam Mullis, Benjamin William Schlichtmann, Balaji Narasimhan, Rebecca Cademartiri, Surya K Mallapragada
Neurodegenerative diseases are a debilitating set of conditions that affect a significant fraction of the world's population, and this fraction is expected to increase as the population ages. Many therapeutic strategies have been explored to treat the pathological mechanisms of neurodegenerative disease, but multiple sequential hurdles to central nervous system delivery, including the blood-brain barrier, diseased neuronal membranes, and the organelle barrier, make drug delivery challenging and necessitate the use of innovative strategies to target and cross each barrier...
January 15, 2018: Biomedical Materials
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