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Drug Delivery and Translational Research

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https://www.readbyqxmd.com/read/28812281/preclinical-development-of-an-automated-injection-device-for-intradermal-delivery-of-a-cell-based-therapy
#1
Giulia Leoni, Alex Lyness, Patrick Ginty, Rindi Schutte, Gopalan Pillai, Gayatri Sharma, Paul Kemp, Natalie Mount, Michaela Sharpe
Current methods for intradermal delivery of therapeutic products in clinical use include manual injection via the Mantoux technique and the use of injection devices, primarily developed for the delivery of vaccines and small molecules. A novel automated injection device is presented specifically designed for accurate delivery of multiple doses of product through a number of adjustable injection parameters, including injection depth, dose volume and needle insertion speed. The device was originally conceived for the delivery of a cell-based therapy to patients with skin wounds caused by epidermolysis bullosa...
August 15, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28812250/miv-150-and-zinc-acetate-combination-provides-potent-and-broad-activity-against-hiv-1
#2
Olga Mizenina, Mayla Hsu, Ninochka Jean-Pierre, Meropi Aravantinou, Keith Levendosky, Gabriela Paglini, Thomas M Zydowsky, Melissa Robbiani, José A Fernández-Romero
We previously showed that the combination of the non-nucleoside reverse transcriptase inhibitor (NNRTI) MIV-150 with zinc acetate (ZA) formulated in a carrageenan (CG; MZC) gel provided macaques significant protection against vaginal simian-human immunodeficiency virus-RT (SHIV-RT) challenge, better than either MIV-150/CG or ZA/CG. The MZC gel was shown to be safe in a phase 1 clinical trial. Herein, we used in vitro approaches to study the antiviral properties of ZA and the MIV-150/ZA combination, compared to other NNRTIs...
August 15, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28812225/enhancement-of-ocular-efficacy-of-aceclofenac-using-biodegradable-plga-nanoparticles-formulation-and-characterization
#3
Rajesh Katara, Sameer Sachdeva, Dipak K Majumdar
In the present study, an effort was made to design poly (D, L-lactide-co-glycolide) acid nanoparticles of aceclofenac by direct precipitation method. The nanoparticles were found to have adequate particle size range for ocular administration of 162.6 to 244.13 nm with nearly spherical shape and with zeta potential of - 21.5 to - 25.5 mV. Drug entrapment efficiency of nanoparticle formulations ranged from 42.9 to 92.68%. Differential scanning calorimetric (DSC) and powder X-ray diffraction (PXRD) studies depicted that the drug incorporated in nanoparticles was found to be in amorphous state...
August 15, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28801835/fabrication-of-acyclovir-loaded-flexible-membrane-vesicles-fmvs-evidence-of-preclinical-efficacy-of-antiviral-activity-in-murine-model-of-cutaneous-hsv-1-infection
#4
Gajanand Sharma, Kanika Thakur, Arvind Setia, Basant Amarji, Mini P Singh, Kaisar Raza, Om Prakash Katare
The present investigation focuses on the development and evaluation of acyclovir-loaded flexible membrane vesicles (ACY-FMVs) and evaluates their targeting potential to localize the drug into skin layers. The drug-loaded FMVs were prepared by thin-film hydration method and characterized for various attributes including micromeritics, entrapment efficiency, vesicle shape, size, and degree of deformability. The values of particle size and zeta potential of the developed carrier system were found to be 453.7 nm and - 11...
August 11, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28799125/non-polymer-drug-eluting-coronary-stents
#5
REVIEW
Nagavendra Kommineni, Raju Saka, Wahid Khan, Abraham J Domb
Cardiovascular complications are leading causes of most fatalities. Coronary artery disease and surgical failures contribute to the death of the majority of patients. Advanced research in the field of medical devices like stents has efficiently resolved these problems. Clinically, drug-eluting stents have proven their efficacy and safety compared to bare metal stents, which have problems of in-stent restenosis. However, drug-loaded stents coated with polymers have shown adverse effects related to the stability and deterioration of the polymer coating over time...
August 10, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28776220/nanostructured-lipid-carriers-to-enhance-transdermal-delivery-and-efficacy-of-diclofenac
#6
Chien Ngoc Nguyen, Thi Thuy Trang Nguyen, Hanh Thuy Nguyen, Tuan Hiep Tran
Lipid carrier-mediated transdermal drug delivery offers several advantages because it is non-irritating and non-toxic, provides effective control of drug release, and forms an adhesive film that hydrates the outer skin layers. However, to penetrate the deeper skin layers, these formulations need to overcome several barriers in the stratum corneum. This study evaluates factors influencing particle size and drug-loading capacity, which play a key role in drug permeation and efficacy. Diclofenac sodium was chosen as the model drug...
August 3, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28755158/optimizing-endothelial-cell-functionalization-for-cell-therapy-of-vascular-proliferative-disease-using-a-direct-contact-co-culture-system
#7
Mark R Battig, Ilia Fishbein, Robert J Levy, Ivan S Alferiev, David Guerrero, Michael Chorny
Increased susceptibility to thrombosis, neoatherosclerosis, and restenosis due to incomplete regrowth of the protective endothelial layer remains a critical limitation of the interventional strategies currently used clinically to relieve atherosclerotic obstruction. Rapid recovery of endothelium holds promise for both preventing the thrombotic events and reducing post-angioplasty restenosis, providing the rationale for developing cell delivery strategies for accelerating arterial reendothelialization. The successful translation of experimental cell therapies into clinically viable treatment modalities for restoring vascular endothelium critically depends on identifying strategies for enhancing the functionality of endothelial cells (EC) derived from high cardiovascular risk patients, the target group for the majority of angioplasty procedures...
July 28, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28752299/silica-microparticles-for-sustained-zero-order-release-of-an-anti-cd40l-antibody
#8
Puneet Tyagi, Mika Koskinen, Jari Mikkola, Lasse Leino, Alexander Schwarz
Silica microparticle hydrogel depot (HG) formulation was prepared using spray drying of silica-based sol-gels for the sustained delivery of MR1 antibody which binds to CD40 ligand (CD40L). The formulation was tested in vitro for antibody release, surface morphology, particle size, rheology, and injectability. In vivo pharmacokinetic evaluation was performed for the microparticle formulation and free MR1 antibody in BALB/c female mice. Serum samples up to day 62 were assessed using an enzyme-linked immunosorbent assay...
July 27, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28744782/storage-of-nitroglycerin-ntg-admixed-with-hboc-201-for-30%C3%A2-days-in-polyolefin-plastic-bags-a-pilot-study
#9
Savita Nigam, Richard McCarron, Francoise Arnaud
Hemorrhaged animals have benefited from resuscitation with the hemoglobin-based oxygen carrier (HBOC-201). Co-infusion of nitric oxide (NO) via separate intravascular lines is effective in attenuating HBOC-induced elevation of blood pressure. We tested whether nitroglycerin (NTG) and HBOC-201 can be packaged together as a single drug for resuscitation. Since NTG binds easily to plastics such as polyvinylchloride, we assessed the stability of this combination in oxygen barrier double-layer ethylene-vinyl alcohol/polyolefin bags over a 30-day period...
July 25, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28741113/approaches-to-prevent-bleeding-associated-with-anticoagulants-current-status-and-recent-developments
#10
REVIEW
Manu Thomas Kalathottukaren, Charles A Haynes, Jayachandran N Kizhakkedathu
Anticoagulants are widely used for the prophylaxis and treatment of cardiovascular disorders and to prevent blood clotting during surgeries. However, the major limitation associated with anticoagulant therapy is bleeding; all the current anticoagulants do have a bleeding risk. The propensity to bleed is much higher among the elderly population and patients with renal insufficiency. Therefore, there is an utmost and urgent clinical need for a highly efficient, nontoxic antidote with excellent anticoagulant reversal activity...
July 24, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28707265/editorial
#11
EDITORIAL
Michael R Doschak, Christine Allen, Emmanuel Ho
No abstract text is available yet for this article.
July 13, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28707264/evaluation-of-propylene-glycol-nanoliposomes-containing-curcumin-on-burn-wound-model-in-rat-biocompatibility-wound-healing-and-anti-bacterial-effects
#12
Nooshin Kianvash, Abbas Bahador, Maryam Pourhajibagher, Homanaz Ghafari, Vahid Nikoui, Sayed Mehdi Rezayat, Ahmad Reza Dehpour, Alireza Partoazar
Curcumin is an effective wound healing agent in burn therapy, but due to its low bioavailability, it is required to be formulated for topical therapy. Liposomal nanocarriers are developed as stable and efficient dermal delivery systems. In this study, we prepared curcumin-propylene glycol liposomes (Cur-PgL) to treat animals subjected to second degree burns. The characterization tests confirmed the production of monodisperse nanoliposomes of average size of about 145 nm with high entrapment efficiency percentage and a sustained release behavior...
July 13, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28707263/delivery-of-viral-vectors-for-gene-therapy-in-intimal-hyperplasia-and-restenosis-in-atherosclerotic-swine
#13
REVIEW
Sannette Hall, Devendra K Agrawal
Cardiovascular diseases including atherosclerosis are a major financial and health burden globally. Inflammation associated with atherosclerosis results in the development of plaques that can rupture causing thrombosis, stroke, or death. The most widely used treatment for the removal of atherosclerotic plaques is percutaneous transluminal coronary angioplasty (PTCA) with or without stenting. Although this is a safer and minimally invasive method, restenosis and intimal hyperplasia after interventional procedure remains a major hurdle and more refined approaches are needed...
July 13, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28695431/the-antitumor-efficacy-of-docetaxel-is-enhanced-by-encapsulation-in-novel-amphiphilic-polymer-cholesterol-coupled-tocopheryl-polyethylene-glycol-1000-succinate-micelles
#14
Qingjing Tian, Jia Shi, Xiaoyun Zhao, Donghua Di, Yihui Deng, Yanzhi Song
Tocopheryl polyethylene glycol 1000 succinate (TPGS) is considered a promising surfactant, but its high critical micelle concentration (CMC) limits its application. Cholesterol is hydrophobic, can act as a tumor-targeting ligand, and has strong binding ability with taxoids. Based on this information, we coupled cholesterol with TPGS to synthesize cholesterol-coupled TPGS (TPGS-CHMC), which had a lower CMC than pure TPGS. The TPGS-CHMC was used to prepare micelles loading with docetaxel (DTX) by a self-assembly method...
July 10, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28677033/preparation-and-evaluation-of-self-microemulsions-for-improved-bioavailability-of-ginsenoside-rh1-and-rh2
#15
Feifei Yang, Jing Zhou, Xiao Hu, Stephanie Kyoungchun Yu, Chunyu Liu, Ruile Pan, Qi Chang, Xinmin Liu, Yonghong Liao
Due to intestinal cytochrome P450 (CYP450)-mediated metabolism and P-glycoprotein (P-gp) efflux, poor oral bioavailability hinders ginsenoside-Rh1 (Rh1) and ginsenoside-Rh2 (Rh2) from clinical application. In this study, Rh1 and Rh2 were incorporated into two self-microemulsions (SME-1 and SME-2) to improve oral bioavailability. SME-1 contained both CYP450 and P-gp inhibitory excipients while SME-2 only consisted of P-gp inhibitory excipients. Results for release, cellular uptake, transport, and lymph node distribution demonstrated no significant difference between either self-microemulsions in vivo, but were elevated significantly in comparison to the free drug...
July 5, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28677032/molecular-mechanism-of-polymer-assisting-supersaturation-of-poorly-water-soluble-loratadine-based-on-experimental-observations-and-molecular-dynamic-simulations
#16
Shenwu Zhang, Mengchi Sun, Yongshan Zhao, Xuyang Song, Zhonggui He, Jian Wang, Jin Sun
Polymers have been usually used to retard nucleation and crystal growth in order to maintain supersaturation, yet their roles in inhibition of nucleation and crystal growth are poorly understood. In our work, the polymer-based supersaturation performances and molecular mechanisms of poorly aqueous soluble loratadine were investigated. Two common hydrophilic polymers (hydroxylpropylmethyl cellulose acetate succinate (HPMC-AS) and poly(vinylpyrrolidone-co-vinyl-acetate) (PVP-VA)) were used. It was found that HPMC-AS was a better polymer to prevent drug molecules from aggregation and to maintain the supersaturated state in solution than PVP-VA...
July 5, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28656488/the-role-of-monocyte-subpopulations-in-vascular-injury-following-partial-and-transient-depletion
#17
Etty Grad, Ksenia Zolotarevsky, Haim D Danenberg, Mirjam M Nordling-David, Dikla Gutman, Gershon Golomb
The innate immunity system plays a critical role in vascular repair and restenosis development. Liposomes encapsulating bisphosphonates (LipBPs), but not free BPs, suppress neointima formation following vascular injury mediated in part by monocytes. The objective of this study was to elucidate the role of monocyte subpopulations on vascular healing following LipBP treatment. The potency- and dose-dependent treatment effect of clodronate (CLOD) and alendronate (ALN) liposomes on restenosis inhibition, total monocyte depletion, and monocytes subpopulation was studied...
June 27, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28653286/user-input-in-iterative-design-for-prevention-product-development-leveraging-interdisciplinary-methods-to-optimize-effectiveness
#18
Kate M Guthrie, Rochelle K Rosen, Sara E Vargas, Melissa Guillen, Arielle L Steger, Melissa L Getz, Kelley A Smith, Jaime J Ramirez, Erna M Kojic
The development of HIV-preventive topical vaginal microbicides has been challenged by a lack of sufficient adherence in later stage clinical trials to confidently evaluate effectiveness. This dilemma has highlighted the need to integrate translational research earlier in the drug development process, essentially applying behavioral science to facilitate the advances of basic science with respect to the uptake and use of biomedical prevention technologies. In the last several years, there has been an increasing recognition that the user experience, specifically the sensory experience, as well as the role of meaning-making elicited by those sensations, may play a more substantive role than previously thought...
June 26, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28639139/ex-vivo-permeation-of-erythropoietin-through-porcine-conjunctiva-cornea-and-sclera
#19
Ana Paula Resende, Beatriz Silva, Berta São Braz, Telmo Nunes, Lídia Gonçalves, Esmeralda Delgado
The aim of this study is to test the permeation of human recombinant erythropoietin (rHuEPO) across conjunctiva, cornea, and sclera in an ex vivo model. Thirty fresh pig eyes were collected from a slaughterhouse. Conjunctivas (n = 10), corneas (n = 10), and scleras (n = 10) were surgically dissected from surrounding tissues. Ocular membranes were placed into Franz diffusion cells and rHuEPO was administered into the donor phase of each cell, except for control samples. Samples were collected from the receptor phase at seven time points, from 30 min to 6 h of incubation...
June 21, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28612340/long-acting-systemic-hiv-pre-exposure-prophylaxis-an-examination-of-the-field
#20
REVIEW
William R Lykins, Ellen Luecke, Daniel Johengen, Ariane van der Straten, Tejal A Desai
Oral pre-exposure prophylaxis for the prevention of HIV-1 transmission (HIV PrEP) has been widely successful as demonstrated by a number of clinical trials. However, studies have also demonstrated the need for patients to tightly adhere to oral dosing regimens in order to maintain protective plasma and tissue concentrations. This is especially true for women, who experience less forgiveness from dose skipping than men in clinical trials of HIV PrEP. There is increasing interest in long-acting (LA), user-independent forms of HIV PrEP that could overcome this adherence challenge...
June 13, 2017: Drug Delivery and Translational Research
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